Surface treatment method for powder, powder surface-treated by said method, treatment agent for powder, powder surface-treated by said treatment agent, and cosmetic composition

Abstract

The purpose of the present invention is to provide a treatment agent that can be applied with less man-hours, that can surface-treat a powder by a simple method without requiring a special device, and that has excellent storage stability. The present invention pertains to a surface treatment method for a powder, the method comprising (i) a step for treating a powder by using a treating liquid A, and (ii) a step for treating the powder by using a treating liquid B. The treating liquid A contains (a) at least one compound selected from N-acylamino acids having an acyl group and having a carbon chain length of C8-C22 and salts thereof, (b) at least one compound selected from fatty acids having a carbon chain length of C8-C22 and salts thereof, (c) a polyhydric alcohol and / or (d) arginine, and (e) water. The concentration of the compound (a) in the treating liquid A is 5 mass% or more. When the treating liquid A does not contain arginine, the mass ratio (compound (b) / compound (a)) of the compound (b) and the compound (a) in the treating liquid A is 0.13 or less. When the treating liquid A does not contain a polyhydric alcohol, the mass ratio (compound (b) / compound (a)) of the compound (b) and the compound (a) in the treating liquid A is 0.25 or less. The treating liquid B is an aqueous solution containing (f) metal ions, and the metal ions (f) include ions of an alkaline earth metal or ions of zinc.

Description

Powder surface treatment method, powder surface-treated by the method, powder treatment agent, powder surface-treated with the treatment agent, and cosmetic composition

[0001] The present invention relates to a powder treatment agent having excellent storage stability.

[0002] Powders used in cosmetics are subjected to various surface treatments for the purposes of improving usability (smoothness upon application to the skin, spreadability, moist feeling, non-greasy feeling, adhesion, etc.), cosmetic effects (coverage, soft focus properties, light absorption / dispersion, color development, etc.), cosmetic durability (prevention of makeup dulling or discoloration caused by wetting the powder with sweat or sebum, adhesion, resistance to removal and smudging, etc.), formulation stability (dispersibility, emulsion stability), and moldability. Since the desired effects vary depending on the application, numerous surface treatment agents have been proposed. One example is the long-standing attempt to treat the surface of powders with N-acylamino acids, and a surface treatment method using an aluminum salt, magnesium salt, calcium salt, zinc salt, zirconia salt, or titanium salt of N-acylamino acid has been disclosed (Japanese Patent Laid-Open Publication No. 58-72512). In order to maintain the adhesion of N-acylamino acids to the surface of cosmetics containing water or oil after incorporation, it is not sufficient to simply mix the N-acylamino acid with a powder. Patent Document 1 discloses that metal ions with a positive charge of two or more valences are used to bond the negatively charged hydroxyl groups on the powder surface with the negatively charged carboxyl groups of the N-acylamino acid, thereby achieving oriented adsorption in water or an aqueous solvent solution. This method requires the steps of filtration, washing, drying, and pulverization, which limits its commercial merits. Furthermore, the need for drying and pulverization can lead to the powder's tendency to aggregate, resulting in insufficient balance between hydrophilicity and hydrophobicity, cosmetic durability, evenness, and antiseptic effect. It also places a significant burden on the environment.

[0003] On the other hand, a modification method (JP 2014-19783 A) is also known in which plasma is applied to a powder to be treated before surface treatment, and an acylamino acid is directly reacted with the powder surface. This method requires special equipment such as an electrode for generating plasma.

[0004] JP 58-72512 A JP 2014-19783 A

[0005] The present invention aims to provide a treatment agent that can be used to surface treat powder by a simple method that can be carried out with a small number of steps and does not require special equipment, and that has excellent storage stability.

[0006] As a result of extensive research, the present inventors have found for the first time that the above-mentioned problems can be solved by using a treatment solution A containing an N-acylamino acid or a salt thereof having an acyl group with a carbon chain length of C8 to C22, a fatty acid or a salt thereof having an acyl group with a carbon chain length of C8 to C22, a polyhydric alcohol and / or arginine, and water, and a treatment solution B which is an aqueous solution containing metal ions, and have completed the present invention based on this finding. [1] A method for surface treatment of powder, comprising: (i) a step of treating the powder with treatment liquid A; and (ii) a step of treating the powder with treatment liquid B, wherein treatment liquid A contains (a) one or more compounds selected from N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof, (b) one or more compounds selected from fatty acids having a carbon chain length of C8 to C22 and salts thereof, (c) a polyhydric alcohol and / or (d) arginine, and (e) water, wherein the concentration of compound (a) in treatment liquid A is 5% by mass or more, and when treatment liquid A does not contain arginine, the mass ratio of compound (b) to compound (a) in treatment liquid A (compound (b) / compound (a)) is 0.13 or less, A method in which, when treatment liquid A does not contain a polyhydric alcohol, the mass ratio of compound (b) to compound (a) in treatment liquid A (compound (b) / compound (a)) is 0.25 or less, and treatment liquid B is an aqueous solution containing metal ions (f), the metal ions (f) including alkaline earth metal ions or zinc ions. [2] The method according to [1] above, in which the metal ions (f) include ions of one or more metals selected from the group consisting of calcium, zinc, and magnesium. [3] The method according to [1] above, in which treatment liquid B is a weakly acidic, neutral, or alkaline aqueous solution. [4] The method according to [1] above, in which the molar ratio of metal ions (f) in treatment liquid B to compound (a) in treatment liquid A is 0.3 to 10. [5] The method according to [1] above, in which the mass ratio of powder to treatment liquid A is 0.1 to 10,000. [6] The method according to [1] above, wherein the mass ratio of the powder to the treatment solution B is 0.5 to 10,000. [7] The method according to [1] above, wherein the treatment solution A does not contain (d) arginine, and the concentration of the compound (b) in the treatment solution A is 6 mass% or less.[8] The method according to [1] above, wherein treatment liquid A contains (d) arginine, and the concentration of compound (b) in treatment liquid A is 6% by mass or less. [9] The method according to [1] above, wherein treatment liquid A contains (c) a polyhydric alcohol.

[10] The method according to [1] above, wherein the mixture obtained by mixing treatment liquid A and treatment liquid B forms a gel composition.

[11] The method according to [1] above, wherein the mixture obtained by mixing treatment liquid A and treatment liquid B has a dynamic friction coefficient of 0.7 or more.

[12] The method according to [1] above, wherein the mixture obtained by mixing treatment liquid A and treatment liquid B has a water retention capacity (%) of 8 to 50.

[13] A powder that has been surface-treated by the method according to [1] above.

[14] A cosmetic composition containing the powder according to

[13] above.

[15] A powder treatment agent comprising treatment liquid A and treatment liquid B, wherein treatment liquid A comprises (a) one or more compounds selected from N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof, (b) one or more compounds selected from fatty acids having a carbon chain length of C8 to C22 and salts thereof, (c) a polyhydric alcohol and / or (d) arginine, and (e) water, wherein the concentration of compound (a) in treatment liquid A is 5 mass% or more, and when treatment liquid A does not contain arginine, the mass ratio of compound (b) to compound (a) in treatment liquid A (compound (b) / compound (a)) is 0.13 or less, and when treatment liquid A does not contain polyhydric alcohol, the mass ratio of compound (b) to compound (a) in treatment liquid A (compound (b) / compound (a)) is 0.25 or less, and treatment liquid B is (f) an aqueous solution containing metal ions, The treatment agent, wherein the metal ion (f) includes an ion of an alkaline earth metal or a zinc ion.

[16] The treatment agent according to

[15] above, wherein the metal ion (f) includes, as the metal ion, an ion of one or more metals selected from the group consisting of calcium, zinc, and magnesium.

[17] The treatment agent according to

[15] above, wherein treatment liquid B is a weakly acidic, neutral, or alkaline aqueous solution.

[18] The treatment agent according to

[15] above, wherein the molar ratio of the metal ion (f) in treatment liquid B to the compound (a) in treatment liquid A is 0.3 to 10.

[19] The treatment agent according to

[15] above, wherein the mass ratio of powder to treatment liquid A used for treatment is 0.1 to 10,000.

[20] The treatment agent according to

[15] above, wherein the mass ratio of powder to treatment liquid B is 0.5 to 10,000.

[21] The treatment agent according to

[15] above, wherein treatment liquid A does not contain (d) arginine, and the concentration of compound (b) in treatment liquid A is 6% by mass or less.

[22] The treatment agent according to

[15] above, wherein treatment liquid A contains (d) arginine, and the concentration of compound (b) in treatment liquid A is 6% by mass or less.

[23] The treatment agent according to

[15] above, wherein treatment liquid A contains (c) a polyhydric alcohol.

[24] The treatment agent according to

[15] above, wherein the mixture obtained by mixing treatment liquid A and treatment liquid B forms a gel composition.

[25] The treatment agent according to

[11] above, wherein the mixture obtained by mixing treatment liquid A and treatment liquid B has a dynamic friction coefficient of 0.7 or more.

[26] The treatment agent according to

[15] above, wherein the mixture obtained by mixing treatment liquid A and treatment liquid B has a water retention capacity (%) of 8 to 50.

[27] A powder that has been surface-treated with the treatment agent according to

[15] above.

[28] A cosmetic composition containing the powder according to

[27] above.

[29] A powder whose surface is coated with a composition containing: (a) one or more compounds selected from N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof; (b) one or more compounds selected from fatty acids having a carbon chain length of C8 to C22 and salts thereof; (c) a polyhydric alcohol and / or (d) arginine; (e) water; and (f) a metal ion, wherein when the composition does not contain arginine, the mass ratio of compound (b) to compound (a) (compound (b) / compound (a)) is 0.13 or less; when the composition does not contain polyhydric alcohol, the mass ratio of compound (b) to compound (a) (compound (b) / compound (a)) is 0.25 or less; and the metal ion (f) comprises an alkaline earth metal ion or a zinc ion.

[30] The powder according to

[29] above, wherein the composition is a gel composition.

[31] The powder according to any one of

[13] ,

[27] and

[29] above, wherein the composition has a coefficient of dynamic friction of 0.7 or more.

[32] The powder according to any one of

[13] ,

[27] and

[29] above, wherein the composition has a water retention capacity (%) of 8 to 50.

[33] The powder described in any one of

[13] ,

[27] and

[29] , wherein the water retention capacity (%) of the powder is 1 or more.

[0007] 1 is a graph showing the synergistic antifungal effect of surface treatment compositions A and B. FIG 2 is a diagram showing the appearance of the coating films of Example 11', Reference Example 1' and Reference Example 3'.

[0008] The method for treating powder surfaces of the present invention comprises the following steps: (i) treating powder with treatment liquid A, and (ii) treating powder with treatment liquid B. Treatment liquid A contains the following components: (a) one or more compounds selected from N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof, (b) one or more compounds selected from fatty acids having a carbon chain length of C8 to C22 and salts thereof, (c) a polyhydric alcohol and / or (d) arginine, and (e) water. Treatment liquid B contains (f) metal ions.

[0009] With regard to compound (a), the amino acid component constituting the N-acylamino acid having an acyl group with a carbon chain length of C8 to C22 may be any of acidic, neutral, and basic amino acids, and may also be any of α-, β-, and ε-amino acids. Examples include glycine, β-alanine, α-alanine, proline, valine, leucine, phenylalanine, 3,4-dioxyphenylalanine, serine, threonine, methionine, lysine, ornithine, arginine, histidine, ε-aminocaproic acid, glutamic acid, and aspartic acid. Glycine, β-alanine, α-alanine, proline, threonine, lysine, arginine, glutamic acid, and aspartic acid are more preferred, glycine, β-alanine, α-alanine, threonine, glutamic acid, and aspartic acid are more preferred, and glutamic acid and aspartic acid are even more preferred. When an amino acid component having a plurality of amino groups (including imino groups) is used, it is sufficient that at least one of the amino groups is acylated. For example, all of the amino groups may be acylated with a plurality of types of acyl components, or may be in the form of a mono-N-acyl derivative. Examples of the acyl component constituting the N-acyl group of an N-acylamino acid having an acyl group with a carbon chain length of C8 to C22 include acyl groups derived or derivable from linear or branched, saturated or unsaturated fatty acids having 8 to 22 carbon atoms, such as single fatty acid acyl groups such as octanoyl, caproyl, nonanoyl, caprinoyl, decanoyl, undecanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, behenoyl, palmitoleoyl, oleoyl, and linoleoyl, as well as naturally occurring mixed fatty acid acyl groups such as coconut oil fatty acid acyl and hardened beef tallow fatty acid acyl, as well as aromatic carboxylic acid acyl groups such as benzoic acid acyl. While such acyl groups can be derived from fatty acids, they can also be derived from raw materials other than fatty acids (fatty acid esters, fatty acid salts, acid halides, acid anhydrides, etc.). N-acyl amino acids having an acyl group with a carbon chain length of C8 to C20 are preferred, N-acyl amino acids having an acyl group with a carbon chain length of C14 to C18 are more preferred, and N-acyl amino acids having an acyl group with a carbon chain length of C16 to C18 are even more preferred.The acyl group of an N-acylamino acid having an acyl group with a carbon chain length of C8 to C20 is preferably a myristoyl group, a palmitoyl group, a stearoyl group, a behenoyl group, a palmitoleyl group, an oleoyl group, or a linoleoyl group, more preferably a myristoyl group, a palmitoyl group, or a stearoyl group, and even more preferably a palmitoyl group or a stearoyl group. Examples of salts of an N-acylamino acid having an acyl group with a carbon chain length of C8 to C22 include pharmacologically acceptable salts, such as alkali metal salts (e.g., lithium salt, sodium salt, potassium salt, etc.); alkaline earth metal salts (e.g., calcium salt, magnesium salt, etc.); ammonium salts; basic organic salts; triethanolamine salts, etc. Among these, from the viewpoint of solubility, sodium salt, potassium salt, ammonium salt, and triethanolamine salt are preferred, sodium salt and potassium salt are more preferred, and sodium salt is even more preferred. In the case of polybasic acids such as dibasic acids, either monosalts (monosodium glutamate, etc.) or di-salts (disodium glutamate, etc.) can be used. Specific examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include myristoyl glutamic acid, the sodium salt of myristoyl glutamic acid, the potassium salt of myristoyl glutamic acid, palmitoyl glutamic acid, the sodium salt of palmitoyl glutamic acid, the potassium salt of palmitoyl glutamic acid, stearoyl glutamic acid, the sodium salt of stearoyl glutamic acid, the potassium salt of stearoyl glutamic acid, oleoyl glutamic acid, the sodium salt of oleoyl glutamic acid, and the potassium salt of oleoyl glutamic acid, and myristoyl glutamic acid are preferred. More preferred are glutamic acid, the sodium salt of myristoyl glutamic acid, the potassium salt of myristoyl glutamic acid, palmitoyl glutamic acid, the sodium salt of palmitoyl glutamic acid, the potassium salt of palmitoyl glutamic acid, stearoyl glutamic acid, the sodium salt of stearoyl glutamic acid, and the potassium salt of stearoyl glutamic acid, and even more preferred are glutamic acid, the sodium salt of palmitoyl glutamic acid, the potassium salt of palmitoyl glutamic acid, stearoyl glutamic acid, the sodium salt of stearoyl glutamic acid, and the potassium salt of stearoyl glutamic acid.Preferred N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include myristoyl glutamic acid, sodium myristoyl glutamate, disodium myristoyl glutamate, potassium myristoyl glutamate, dipotassium myristoyl glutamate, palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, potassium palmitoyl glutamate, dipotassium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, potassium stearoyl glutamate, dipotassium stearoyl glutamate, sodium oleoyl glutamate, oleoyl glutamic acid, disodium oleoyl glutamate, potassium oleoyl glutamate, and dipotassium oleoyl glutamate, and more preferred are myristoyl glutamic acid, sodium myristoyl glutamate, and myristoyl glutamic acid. disodium palmitoyl glutamate, palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, and oleoyl glutamic acid, sodium oleoyl glutamate, disodium oleoyl glutamate, more preferred are myristoyl glutamic acid, sodium myristoyl glutamate, disodium myristoyl glutamate, palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, and even more preferred are palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, and disodium stearoyl glutamate.Furthermore, examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, potassium palmitoyl glutamate, dipotassium palmitoyl glutamate, palmitoyl glutamic acid triethanolamine salt, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, potassium stearoyl glutamate, stearo ... Alternatively, dipotassium stearoyl glutamate or triethanolamine stearoyl glutamate may be used. Alternatively, palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, potassium palmitoyl glutamate, dipotassium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, potassium stearoyl glutamate, or dipotassium stearoyl glutamate may also be used. The use of these N-acyl amino acids can improve the balance of hydrophilicity and hydrophobicity of the treated powder, as well as multiple properties selected from the balance of makeup durability, evenness, and antiseptic effect. The concentration of compound (a) in treatment solution A is 5% by mass or more, preferably 7% by mass or more. The concentration of compound (a) in treatment solution A may be preferably 5 to 30% by mass, more preferably 5 to 25% by mass, and even more preferably 7 to 20% by mass. By setting the concentration of compound (a) in treatment liquid A to this range, it is possible to improve a number of properties selected from the stability of treatment liquid A during long-term storage at low temperatures, its preservative effect, the balance between the hydrophilicity and hydrophobicity of the treatment powder when a small amount of treatment liquid A is used, the durability of makeup, evenness, and preservative effect.

[0010] The fatty acid having a carbon chain length of C8 to C22, which is compound (b), may be a straight-chain fatty acid or a branched-chain fatty acid, with straight-chain fatty acids being preferred. The fatty acid having a carbon chain length of C8 to C22 may be a saturated fatty acid or an unsaturated fatty acid, with saturated fatty acids being preferred. The fatty acid having a carbon chain length of C8 to C22 is preferably a fatty acid having a carbon chain length of C8 to C20, more preferably a fatty acid having a carbon chain length of C14 to C18, and even more preferably a fatty acid having a carbon chain length of C16 to C18. Examples of fatty acids having a carbon chain length of C8 to C22 include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, arachidic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, eicosenoic acid, erucic acid, hardened beef tallow fatty acid, coconut oil fatty acid, and palm oil fatty acid. Fatty acids having a carbon chain length of C8 to C22 are preferably lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, arachidic acid, behenic acid, and oleic acid, more preferably myristic acid, palmitic acid, palmitoleic acid, stearic acid, and oleic acid, even more preferably myristic acid, palmitic acid, and stearic acid, and even more preferably palmitic acid and stearic acid. Salts of fatty acids having a carbon chain length of C8 to C22 include pharmacologically acceptable salts, such as alkali metal salts (lithium salt, sodium salt, potassium salt, etc.); alkaline earth metal salts (calcium salt, magnesium salt, etc.); ammonium salts; basic organic salts; triethanolamine salts, etc. Among these, from the viewpoint of solubility, sodium salts, potassium salts, and ammonium salts are preferred, sodium salts and potassium salts are more preferred, and sodium salts are even more preferred. From the viewpoint of stability, the fatty acid having a carbon chain length of C8 to C22 as compound (b) preferably has a partition coefficient of 10 or less, more preferably 8.5 or less. When treatment solution A does not contain (d) arginine, the concentration of compound (b) in treatment solution A is preferably 6% by mass or less, and may be 5% by mass or less, 4% by mass or less, 3% by mass or less, 2.6% by mass or less, 2% by mass or less, 1.6% by mass or less, 1.3% by mass or less, 1% by mass or less, 0.7% by mass or less, or 0.5% by mass or less.When treatment solution A contains (d) arginine, the concentration of compound (b) in treatment solution A is preferably 6% by mass or less, and may be 5% by mass or less, 4.5% by mass or less, 4% by mass or less, 3.5% by mass or less, 3% by mass or less, 2.5% by mass or less, 2% by mass or less, 1.5% by mass or less, or 1% by mass or less. When treatment solution A contains (c) a polyhydric alcohol and (d) arginine, the concentration of compound (b) in treatment solution A is preferably 8% by mass or less, and may be 7% by mass or less, 6% by mass or less, 5% by mass or less, 4.5% by mass or less, 4% by mass or less, 3.5% by mass or less, 3% by mass or less, 2.5% by mass or less, 2% by mass or less, 1.5% by mass or less, or 1% by mass or less. In either case, the concentration of compound (b) in treatment solution A is preferably 0.02% by mass or more, more preferably 0.04% by mass or more, even more preferably 0.06% by mass or more, still more preferably 0.1% by mass or more, even more preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, and particularly preferably 0.4% by mass or more. Compound (b) in treatment solution A may be added to treatment solution A as a raw material separately from the other components in treatment solution A, or may be added to treatment solution A as a raw material contained in a raw material corresponding to the other components in treatment solution A (e.g., compound (a)).

[0011] (c) Examples of polyhydric alcohols include glycerin, pentanediol, dipropylene glycol, 1,3-butylene glycol, pentylene glycol, ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, trimethylolpropane, triethanolamine, pentaerythritol, diglycerin, xylose, sorbitan, xylitol, triglycerin, glucose, fructose, sorbitol, malbitol, tetraglycerin, polyglycerin, sucrose, trehalose, lactose, and maltotriose. Preferred are glycerin, pentanediol, dipropylene glycol, 1,3-butylene glycol, and pentylene glycol. More preferred are glycerin, pentanediol, dipropylene glycol, 1,3-butylene glycol, and pentylene glycol. Even more preferred are glycerin, pentanediol, dipropylene glycol, and 1,3-butylene glycol. Even more preferred is glycerin. The use of a polyhydric alcohol can enhance the stability of the compounds (a) and (b) dissolved in treatment solution A during low-temperature storage, thereby improving the usability of treatment solution A after storage. The polyhydric alcohol is preferably a polyhydric alcohol having 3 to 6 carbon atoms, more preferably a polyhydric alcohol having 3 to 5 carbon atoms, even more preferably a polyhydric alcohol having 3 to 4 carbon atoms, and may particularly be a polyhydric alcohol having 3 carbon atoms. The polyhydric alcohol is preferably a dihydric or trihydric polyhydric alcohol, and may particularly be a trihydric polyhydric alcohol. The concentration of the polyhydric alcohol (c) in treatment solution A is preferably 80% by mass or less, more preferably 3 to 80% by mass, even more preferably 5 to 75% by mass, or 10 to 70% by mass, and particularly preferably 15 to 60% by mass. By setting the concentration of (c) polyhydric alcohol in treatment liquid A in this range, it is possible to improve several properties selected from the balance between hydrophilicity and hydrophobicity of the treatment powder, wettability, durability against makeup dullness, evenness, the SPF value of the formulation when incorporated into an emulsification formulation, preservative effect, and cleansing ability of the cosmetic film.In addition, when treatment liquid A does not contain (c) a polyhydric alcohol, in order to improve the storage stability of treatment liquid A, the mass ratio of compound (b) to compound (a) in treatment liquid A is 0.25 or less, preferably 0.2 or less, more preferably 0.18 or less, even more preferably 0.15 or less, particularly preferably 0.13 or less, and most preferably 0.1 or less.

[0012] Treatment solution A may contain (d) arginine instead of or in addition to (c) polyhydric alcohol. By including arginine, the storage stability and preservative effect of treatment solution A can be improved. In this specification, "preservative" means preventing the invasion, growth, proliferation, etc. of microorganisms, thereby preventing spoilage and fermentation. Therefore, "preservative effect" refers to the effect of inhibiting the growth of fungi such as molds and bacteria, preventing deterioration of the cosmetic, and improving its shelf life. The preservative effect against mold is sometimes referred to as "antifungal effect." By including arginine, a preservative effect is achieved, particularly against fungi. Examples of such fungi include molds of the genus Aspergillus (e.g., Aspergillus brasiliensis), the genus Penicillium, and the genus Fusarium, and Candida albicans. Furthermore, by including arginine, it is possible to improve multiple properties selected from the moisturizing property, adhesion, and durability of the treated powder, and the SPF value of the emulsion formulation when incorporated therein. The concentration of (d) arginine in treatment solution A is preferably 0.5 to 15% by mass, more preferably 0.75 to 10% by mass, or 1.0 to 8% by mass, and even more preferably 1.5 to 7% by mass. Using (d) arginine at such a concentration can improve the storage stability of treatment solution A. Furthermore, from the viewpoint of enhancing the preservative effect, the concentration of (d) arginine in treatment solution A is preferably 0.8% by mass or more, more preferably 1.8 to 15% by mass. Note that when treatment solution A does not contain (d) arginine, in order to improve the storage stability of treatment solution A, the mass ratio of compound (b) to compound (a) in treatment solution A is 0.13 or less, preferably 0.1 or less. Furthermore, since treatment solution A contains (c) a polyhydric alcohol and (d) arginine, the storage stability of treatment solution A can be improved regardless of the mass ratio of compound (b) to compound (a) in treatment solution A.When treatment solution A contains (c) a polyhydric alcohol and (d) arginine, the mass ratio of compound (b) to compound (a) in treatment solution A is preferably 0.2 or less, and more preferably 0.17 or less.

[0013] Treatment solution B contains (f) metal ions, and the metal ions (f) include alkaline earth metal ions or zinc ions, preferably alkaline earth metal ions or zinc ions. Examples of the metal ions (f) include magnesium ions, calcium ions, and zinc ions. Examples of compounds that generate such ions include magnesium hydroxide, magnesium chloride, magnesium sulfate, magnesium nitrate, magnesium potassium sulfate, calcium hydroxide, calcium chloride, calcium nitrate, calcium acetate, zinc chloride, zinc nitrate, zinc sulfate, and zinc acetate. Treatment solution B preferably contains, as metal ions, ions of one or more metals selected from the group consisting of calcium, zinc, and magnesium, and more preferably, as metal ions, ions of one or more metals selected from calcium and zinc. The molar ratio of the metal ions (f) in treatment solution B to the compound (a) in treatment solution A is preferably 0.3 to 10, more preferably 0.35 to 75, even more preferably 0.7 to 5, and particularly preferably 0.7 to 3. By using such a molar ratio, a powder excellent in multiple properties selected from hydrophobicity, covering power, adhesion, and makeup durability can be obtained, and a cosmetic formulation incorporating the powder may be able to have an excellent SPF value. In addition, in a powder treated with treatment liquids A and B, treatment liquid B synergistically enhances the antifungal effect of treatment liquid A. Treatment liquid B preferably has a transmittance at a wavelength of 660 nm of 60% or more, more preferably 80% or more. By setting the transmittance of treatment liquid B within this range, the treated powder can have a better balance of hydrophilicity and hydrophobicity, and multiple properties selected from makeup durability, lack of unevenness and stickiness, antiseptic effect, and the like. The solids concentration in treatment liquid B is preferably 5 to 60% by mass, more preferably 8 to 55% by mass, and even more preferably 10 to 50% by mass. By setting the solids concentration in the treatment liquid B within this range, the treated powder can be treated with the surface treatment agent at a high density, and multiple properties selected from the balance between hydrophilicity and hydrophobicity of the treated powder, makeup durability, evenness, antiseptic effect, etc. can be improved.In one embodiment of the present invention, treatment solution B does not contain a component that inhibits salt formation between the metal ion (f) contained in treatment solution B and the N-acylamino acid having an acyl group with a carbon chain length of C8 to C22, which is compound (a) contained in treatment solution A, at a concentration equal to or greater than a predetermined concentration. Examples of components that inhibit salt formation include metal ions other than alkaline earth metal ions or zinc ions, and components that form chelates with alkaline earth metal ions or zinc ions. The predetermined concentration is, for example, a molar ratio relative to the metal ion (f) contained in treatment solution B of 0.001 or more, 0.01 or more, or 0.05 or more. The predetermined concentration is, for example, a molar ratio relative to the compound (a) contained in treatment solution A of 0.01 or more, 0.05 or more, or 0.1 or more. If the component that inhibits salt formation is contained at such a concentration, salt formation may be inhibited.

[0014] In step (i), treatment liquid A is used in an amount of 0.01 parts by mass or more, preferably 0.1 parts by mass or more, more preferably 5 parts by mass or more, and even more preferably 10 parts by mass or more, relative to 100 parts by mass of powder. Treatment liquid A is used in an amount of 90 parts by mass or less, preferably 70 parts by mass or less, relative to 100 parts by mass of powder. Treatment liquid A may be used in an amount of 0.01 to 70 parts by mass, 0.1 to 70 parts by mass, 1 to 70 parts by mass, 2 to 70 parts by mass, 5 to 70 parts by mass, or 10 to 70 parts by mass. In addition, when the oil absorption of the powder is not high, the treatment liquid A may be used in an amount of 0.01 to 50 parts by mass, 0.1 to 50 parts by mass, 1 to 50 parts by mass, 2 to 50 parts by mass, 5 to 50 parts by mass, 1 to 40 parts by mass, 2 to 40 parts by mass, 5 to 40 parts by mass, 5 to 35 parts by mass, 5 to 30 parts by mass, or 5 to 25 parts by mass, relative to 100 parts by mass of the powder. When the oil absorption of the powder is not high, for example, the oil absorption per 1 g of powder may be 4 g or less, 3 g or less, or 2 g or less. By using treatment liquid A in such an amount, it may be possible to omit steps such as washing, filtering, and drying the treated powder. In step (i), the mass ratio of the powder to treatment liquid A is preferably 0.1 to 10,000, more preferably 0.1 to 2,000, even more preferably 0.1 to 800, still more preferably 0.1 to 400, particularly preferably 0.5 to 200, and most preferably 1 to 20. By using treatment liquid A in such an amount, it is possible to improve the balance between the hydrophilicity and hydrophobicity of the treated powder, as well as multiple properties selected from among makeup durability, evenness, antiseptic effect, etc.

[0015] In step (ii), the mass ratio of the powder to treatment liquid B is preferably 0.5 to 10,000, more preferably 0.5 to 4,000, even more preferably 0.5 to 2,000, particularly preferably 1 to 400, and most preferably 3 to 100. Using treatment liquid B in such an amount can improve the balance between hydrophilicity and hydrophobicity of the treated powder, as well as multiple properties selected from makeup durability, evenness, and antiseptic effect. Treatment liquid B is preferably an aqueous solution with a pH of 9 or less, more preferably an aqueous solution with a pH of 8 or less, even more preferably an aqueous solution with a pH of 7.5 or less, and even more preferably an aqueous solution with a pH of 7 or less. Treatment liquid B may also be a weakly acidic to alkaline aqueous solution. Specifically, the pH may be 3 to 9, 3 to 8, 3 to 7.5, 4 to 9, 4 to 8, 4 to 7.5, 4.5 to 9, 4.5 to 8, 4.5 to 7.5, 5 to 9, 5 to 8, or 5 to 7.5. To adjust the pH, an aqueous citric acid solution, an aqueous tartaric acid solution, lactic acid, an aqueous malic acid solution, an aqueous succinic acid solution, an aqueous ascorbic acid solution, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, potassium hydroxide, or the like may be used. Preferably, a pH adjuster that does not inhibit the salt formation between the compound (a) in treatment solution A and the metal ion (f) in treatment solution B is used, and more preferably, a pH adjuster that does not chelate the metal ion (f) in treatment solution B is used. For example, lactic acid, an aqueous ascorbic acid solution, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, or potassium hydroxide may be used.

[0016] The powder used in the surface treatment method of the present invention is not particularly limited as long as it is used for industrial purposes or cosmetics (pigments, coloring matters, resins, pearls), and examples thereof include resin powders such as nylon powder, nylon beads, silicone beads, and polyethylene beads; metal oxides such as iron oxide (yellow pigment), iron oxide (red pigment), iron oxide (black pigment), tin oxide, chromium oxide, cobalt oxide, zinc oxide, pigment-grade zinc oxide, titanium oxide, pigment-grade titanium oxide, zirconium oxide, aluminum oxide, cerium oxide, fine particle titanium oxide, ultrafine particle titanium oxide, fine particle zinc oxide, and fine particle iron oxide; silicon-containing powders such as silicon oxides such as silicates (silicate (Al / Ca / Na), silicate (Na / Mg)), sericite, mica, talc, kaolin, bentonite, aluminum silicate, magnesium silicate, cubic sodium aluminosilicate, silicon carbide, hydrous silica, and anhydrous silica (leaf-shaped silica, nonporous silica, porous silica, porous silica, semiporous silica, etc.); Examples of suitable powders include metal fatty acid soaps such as magnesium stearate, magnesium myristate, and zinc stearate, carbon-containing powders such as cellulose, cellulose particles, starch, corn starch, rice starch, potato starch, wheat flour, wood powder, carbon black, graphite, ultramarine, Prussian blue, and carmine; metal salts such as barium sulfate, platy barium sulfate, butterfly-shaped barium sulfate, calcium carbonate, and magnesium carbonate; fluorine-containing powders such as synthetic phlogopite (synthetic mica) and synthetic phlogopite iron; boron-containing powders such as boron nitride; composite powders such as pearl powders, colored pearl pigments, and titanium mica; waxes, pigments, and lakes. Furthermore, the powders may be surface-treated, for example, with silicone, a fluorine compound, a silane coupling agent, a silane, an organic titanate, a fatty acid, a metal soap, an oil, or an amino acid. Crystalline or amorphous powders such as resin powders, silicon-containing powders, metal oxides, carbon-containing powders, fluorine-containing powders, metal salts, boron-containing powders, and composite powders are preferred in terms of improving water repellency and oil repellency after treatment.Preferred powders include, for example, talc, mica, sericite, titanium oxide, red iron oxide, yellow iron oxide, black iron oxide, pearl powder, and colored pearl pigments.

[0017] The powder treatment in steps (i) and (ii) may be carried out using a mixer selected from high-speed agitation mixers such as Henschel mixers, FM mixers, high-shear mixers, vertical mixers, and planetary mixers; container rotation mixers or container rotation mixers with agitators such as W-type mixers, CV-type mixers, V-type mixers, rocking mixers, container mixers, Bohle mixers, and chopper-equipped container mixers; and compression / shear / impact mixers such as paddle mixers, ribbon agitation mixers, double-shaft paddle mixers, double-shaft planetary agitation mixers, Nauta mixers, conical screw-type mechanical agitation mixers, airflow agitation mixers, Julia mixers, and Nobilta mixers. Furthermore, from the perspective of scale-up, the surface treatment agent composition and / or acidic solution may be mixed by dropwise mixing or spray mixing. From the perspective of handling the treated powder, the surface treatment method of the present invention preferably does not include a drying step using power and equipment. In the powder surface treatment method of the present invention, step (ii) may be carried out after step (i), or step (i) may be carried out after step (ii). Either or both of step (i) and step (ii) may be performed multiple times. Furthermore, at least a part of step (i) may be performed simultaneously with step (ii), or at least a part of step (ii) may be performed simultaneously with step (i).

[0018] When treatment liquid A and treatment liquid B are mixed, the mixture obtained by mixing treatment liquid A and treatment liquid B contains (c) a polyhydric alcohol and / or (d) arginine, and therefore forms a uniform gel composition with little creaking feeling, thereby improving several properties selected from adhesion, smooth feel, water retention, etc. of the treated powder. In particular, from the viewpoint of forming a smooth gel composition, the mixture obtained by mixing treatment liquid A and treatment liquid B preferably contains (c) a polyhydric alcohol. The mixture obtained by mixing treatment liquid A and treatment liquid B forms a smooth gel composition on the powder surface, thereby producing a treated powder whose surface is coated with a smooth gel composition. The loss tangent Tan(δ) at 23°C of the treatment agent in the mixture obtained by mixing treatment liquid A and treatment liquid B is preferably 1.0 to 0.01, more preferably 0.8 to 0.01, and even more preferably 0.6 to 0.05. The loss tangent Tan(δ) of the mixture can be measured using a dynamic viscoelasticity measuring device (Discovery HR 20, manufactured by TA Instruments). Specifically, using parallel plates (diameter 4.0 cm), the storage modulus G' and loss modulus G'' of the composition are measured under conditions of a strain of 0.1% while controlling the measurement stage temperature at 23°C, and the loss tangent Tan(δ) can be calculated. Furthermore, the dynamic friction coefficient of the mixture obtained by mixing treatment liquid A and treatment liquid B is preferably 0.7 or more, more preferably 1.5 or more, and even more preferably 2.0 or more. The dynamic friction coefficient can be measured as an average dynamic friction coefficient using a Tribomaster (manufactured by Trinity Labs, product name: TL201Ts). Specifically, the composition is applied to artificial leather (manufactured by Idemitsu Technofine Co., Ltd., thickness approximately 2 mm) at a concentration of 8.0 mg / cm. 2The friction tester is thinly applied so that the mass changes equilibrate, and then measurements are performed using a tactile contactor (manufactured by Trinity Labs, finger model fingerprint type). The measurement conditions for the friction tester are a load of 50 gf, a test table movement speed of 25 mm / sec, and a measurement distance of 25 mm. Furthermore, the moisture retention (%) of a mixture obtained by mixing treatment liquid A and treatment liquid B after allowing the mixture to stand at constant temperature and humidity (23°C, 40% relative humidity (RH)) for one day or more is preferably 8 to 50, more preferably 8 to 35, and even more preferably 10 to 25. The moisture retention can be measured using a Karl Fischer moisture meter. Specifically, the moisture content when the mass changes equilibrate is measured using a Karl Fischer moisture meter, and the moisture content at constant temperature and humidity relative to the initial moisture content of the mixture can be calculated as the moisture retention (%) of the mixture (the mixture obtained by mixing treatment liquid A and treatment liquid B). Furthermore, the amount of water relative to the total mass of compound (a) and compound (b) contained in the mixture under constant temperature and humidity can be calculated as the amount of water retained relative to the total mass of compound (a) and compound (b). The powder treatment agent of the present invention contains treatment liquid A and treatment liquid B. The powder treatment agent may be a powder treatment agent obtained by mixing treatment liquid A and treatment liquid B, or may be in the form of a kit containing treatment liquid A and treatment liquid B separately.

[0019] Powders surface-treated by the surface treatment method of the present invention or powders surface-treated with the treatment agent of the present invention are particularly excellent in multiple properties selected from the balance of hydrophilicity and hydrophobicity, makeup durability, evenness, antiseptic effect, moist feel, skin moisture retention effect, ease of dispersion in small amounts of oil, and reduced discoloration due to sebum or sweat. Furthermore, using powders treated by the surface treatment method of the present invention in cosmetic compositions may improve the stability and SPF value of the composition. Powders surface-treated by the surface treatment method of the present invention or powders surface-treated with the treatment agent of the present invention may have a moisture retention (%) of 1 or more, 1.5 or more, or 2 or more when left standing for one day or more under constant temperature and humidity conditions (23°C, 40% relative humidity (RH)). Furthermore, a powder that has been surface-treated by the surface treatment method of the present invention or a powder that has been surface-treated with the treatment agent of the present invention may have a moisture retention (%) that is improved by 50% or more, 100% or more, 150% or more, or 200% or more when left to stand at constant temperature and humidity (23°C, 40% relative humidity (RH)) for one day or more, compared to an untreated powder. In yet another aspect, the surface-treated powder of the present invention is a powder whose surface is coated with a composition containing: (a) one or more compounds selected from N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof; (b) one or more compounds selected from fatty acids having a carbon chain length of C8 to C22 and salts thereof; (c) a polyhydric alcohol and / or (d) arginine; (e) water; and (f) a metal ion; wherein when the composition does not contain arginine, the mass ratio of compound (b) to compound (a) (compound (b) / compound (a)) is 0.13 or less; and when the composition does not contain a polyhydric alcohol, the mass ratio of compound (b) to compound (a) (compound (b) / compound (a)) is 0.25 or less; and the metal ion (f) comprises an alkaline earth metal ion or a zinc ion. The composition that coats the surface of the powder contains (c) a polyhydric alcohol and / or (d) arginine, and therefore the composition forms a uniform gel composition with little squeaky feeling, and can improve several properties of the treated powder selected from adhesion, smooth feel, water retention, etc. In particular, from the viewpoint of forming a smooth gel composition, it is preferable that the composition contains (c) a polyhydric alcohol.The composition forms a smooth gel composition on the surface of the powder, thereby producing a treated powder whose surface is coated with a smooth gel composition. The loss tangent Tan(δ) of the composition at 23°C is preferably 1.0 to 0.01, more preferably 0.8 to 0.01, and even more preferably 0.6 to 0.05. The loss tangent Tan(δ) of the composition can be measured using a dynamic viscoelasticity measuring device (Discovery HR 20, manufactured by TA Instruments). Specifically, the storage modulus G' and loss modulus G'' of the composition are measured using parallel plates (diameter 4.0 cm) at a strain of 0.1% while controlling the measurement stage temperature at 23°C, and the loss tangent Tan(δ) can be calculated. Furthermore, since the composition contains (c) a polyhydric alcohol and / or (d) arginine, the dynamic friction coefficient of the composition is preferably 0.7 or more, more preferably 1.5 or more, and even more preferably 2.0 or more. The dynamic friction coefficient can be measured as an average dynamic friction coefficient using a Tribomaster (manufactured by Trinity Labs, product name: TL201Ts). Specifically, the composition was applied at a concentration of 8.0 mg / cm on artificial leather (manufactured by Idemitsu Technofine Co., Ltd., thickness approximately 2 mm). 2 The composition is thinly applied so that the mass changes equilibrate, and after the mass change reaches equilibrium, the composition can be measured using a tactile contactor (manufactured by Trinity Labs, finger model fingerprint type). The measurement conditions for the friction tester are a load of 50 gf, a test table movement speed of 25 mm / sec, and a measurement distance of 25 mm. Furthermore, the moisture retention (%) of the composition after leaving it at constant temperature and humidity (23°C, 40% relative humidity (RH)) for one day or more is preferably 8 to 50, more preferably 8 to 35, and even more preferably 10 to 25. The moisture retention can be measured using a Karl Fischer moisture meter. Specifically, the moisture content when the mass change reaches equilibrium is measured using a Karl Fischer moisture meter, and the moisture content at constant temperature and humidity relative to the initial moisture content of the composition can be calculated as the moisture retention (%) of the composition (a powder treatment agent obtained by mixing treatment liquid A and treatment liquid B). Furthermore, the amount of water relative to the total mass of compound (a) and compound (b) contained in the composition under constant temperature and humidity can be calculated as the amount of water retained relative to the total mass of compound (a) and compound (b).

[0020] Cosmetic compositions containing powders surface-treated by the surface treatment method of the present invention or cosmetic compositions containing powders surface-treated with the treatment agent of the present invention can be formulated into any form of cosmetic that can be applied to desired areas (e.g., skin, hair, scalp, lips, eyes, eyelashes, eyelids, nails) using conventional methods. Examples of cosmetics for skin, lips, eyelashes, and nails include sunscreens such as sunscreens, body powders, and sprays; makeup cosmetics such as foundations, primers, body colors, bronzers, face powders, nail polishes, cheek colors, makeup bases, and concealers; lip cosmetics such as lip colors, lip liners, and lipsticks; eye makeup cosmetics such as eyeliners, eye shadows, eyebrow makeup, and mascara; leave-on cosmetics such as emulsions, lotions, creams, gels, and serums; and face masks. Examples of cosmetics for hair include hair styling agents, hair emulsions, hair treatments, hair conditioners, and hair lotions. Examples of cosmetics for the scalp include hair growth agents. Preferable cosmetics include, for example, makeup cosmetics, eye makeup cosmetics, lip cosmetics, and leave-on cosmetics. Preferable topical preparations include, for example, ointments, creams, mousses, and gels.

[0021] The present inventors have also found for the first time that a powder surface can be treated with a uniform gel in a simple manner by using a treatment solution A containing an N-acylamino acid or a salt thereof having an acyl group with a carbon chain length of C8 to C22 and a polyhydric alcohol, and a treatment solution B which is an aqueous solution containing metal ions. Therefore, in another aspect of the present invention, the powder surface treatment method of the present invention comprises the following steps: (i) treating the powder with treatment solution A, and (ii) treating the powder with treatment solution B. Here, treatment solution A contains the following components: (a) one or more compounds selected from N-acylamino acids and salts thereof having an acyl group with a carbon chain length of C8 to C22, (c) a polyhydric alcohol, and (e) water. The features of the present invention in this aspect are the same as those described above, unless otherwise specified. In this embodiment, by including component (c) in treatment liquid A, the treatment agent containing treatment liquid A and treatment liquid B forms a uniform gel composition, and the treatment agent containing treatment liquid A and treatment liquid B can treat the surface of the powder with a uniform gel.

[0022] Another aspect of the present invention is a surface treatment agent for powder, comprising the following compounds: (a) one or more N-acylamino acids or salts thereof, and (b') one or more fatty acids and salts thereof.

[0023] In this embodiment, the N-acylamino acid preferably includes N-acylglycine and N-acylglutamic acid. The N-acylamino acid is preferably an N-acylamino acid having an acyl group with a carbon chain length of C8 to C22. The salt of the N-acylamino acid is preferably a metal salt. The metal salt is preferably a sodium salt or a potassium salt. When the N-acylamino acid includes N-acylglycine and N-acylglutamic acid, it is particularly preferable that one of them is a sodium salt and the other is a potassium salt. When the N-acylamino acid includes N-acylglycine and N-acylglutamic acid, the total content of these in the surface treatment agent of this embodiment is preferably 5 to 40% by mass, and more preferably 10 to 30% by mass. The surface treatment agent of this embodiment may also contain lyotropic liquid crystals such as lamellar liquid crystals or hexagonal liquid crystals. For example, when N-acylglycine is used as the N-acylamino acid, if an N-acylglycine having a saturated or unsaturated linear acyl group is used, the structure of the surface treatment composition containing the surface treatment agent of this embodiment will form a lamellar structure, whereas if an N-acylglycine having a branched acyl group is used, the structure of the surface treatment composition containing the surface treatment agent of this embodiment will form a hexagonal structure. Due to these structural differences, powders whose surfaces have been treated with the surface treatment agent of this embodiment exhibit good tactile feel, such as softness, spreadability, and smoothness, and the tactile feel of the powders surface-treated with the surface treatment agent of this embodiment can be controlled.

[0024] In this embodiment, the fatty acid of compound (b') is preferably a fatty acid with a carbon chain length of C8 to C22.

[0025] The pH of the surface treatment agent of this embodiment is preferably 7 to 13, more preferably 8 to 12. The surface treatment agent of this embodiment may further contain an oil. Furthermore, the surface treatment agent of this embodiment may incorporate the features of each of the above-described embodiments of the present invention. Another embodiment of the present invention may be as follows. [1'] A method for producing a surface-treated powder, comprising: (i') a step of treating a powder with a treatment liquid A'; and (ii') a step of treating a powder with a treatment liquid B, wherein the treatment liquid A' contains (a') one or more compounds selected from N-acylglycines or salts thereof, (a'') one or more compounds selected from N-acylglutamic acids or salts thereof, (b') one or more compounds selected from fatty acids and salts thereof, and (e) water; and the treatment liquid B is (f) an aqueous solution containing metal ions, wherein the metal ions (f) contain ions of alkaline earth metals or zinc ions. [2'] A production method according to [1'] above, wherein the fatty acids are fatty acids having a carbon chain length of C8 to C22. [3'] The manufacturing method according to any one of [1'] to [2'] above, wherein the total concentration of the compound (a'), the compound (a"), and the compound (b') in the treatment liquid A' is 5 to 40% by mass. [4'] The manufacturing method according to any one of [1'] to [3'] above, wherein the mass proportion of the compound (a') is 5 to 92% by mass relative to the total mass of the compound (a'), the compound (a"), and the compound (b') in the treatment liquid A'. [5'] The manufacturing method according to any one of [1'] to [4'] above, wherein the mass proportion of the compound (a") is 3 to 90% by mass relative to the total mass of the compound (a'), the compound (a"), and the compound (b') in the treatment liquid A'. [6'] The manufacturing method according to any one of [1'] to [5'] above, wherein the mass proportion of the compound (b') is 5 to 92% by mass relative to the total mass of the compound (a'), the compound (a"), and the compound (b') in the treatment liquid A'. [7'] The manufacturing method according to any one of the above items [1'] to [6'], wherein the mass proportion of the compound (a') is 5 to 92 mass % and the mass proportion of the compound (a") is 3 to 90 mass % relative to the total mass of the compound (a'), the compound (a"), and the compound (b') in the treatment liquid A'.[8'] The manufacturing method according to any one of the above items [1'] to [7'], wherein the mass proportion of compound (a') is 5 to 92 mass% and the mass proportion of compound (b') is 5 to 92 mass% relative to the total mass of compound (a'), compound (a") and compound (b') in treatment liquid A'. [9'] The manufacturing method according to any one of the above items [1'] to [8'], wherein the mass proportion of compound (a") is 3 to 90 mass% and the mass proportion of compound (b') is 5 to 92 mass% relative to the total mass of compound (a'), compound (a") and compound (b') in treatment liquid A'. [10'] The manufacturing method according to any one of the above items [1'] to [9'], wherein the mass proportion of compound (a') is 5 to 92 mass%, the mass proportion of compound (a") is 3 to 90 mass%, and the mass proportion of compound (b') is 5 to 92 mass%, relative to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A'. [11'] The manufacturing method according to any one of the above items [1'] to [10'], wherein the pH of treatment liquid A' is 7 or higher. [12'] The manufacturing method according to any one of the above items [1'] to [11'], wherein the mass ratio of metal ions (f) in treatment liquid B to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A' is 0.01 to 1. [13'] The manufacturing method according to any one of the above items [1'] to [12'], wherein the metal ions (f) include ions of one or more metals selected from the group consisting of calcium, zinc, and magnesium. [14'] The manufacturing method according to any one of the above items [1'] to [13'], wherein the treatment liquid B is a weakly acidic, neutral, or alkaline aqueous solution. [15'] The manufacturing method according to any one of the above items [1'] to [14'], wherein the mass ratio of the powder to the treatment liquid A' is 0.1 to 200. [16'] The manufacturing method according to any one of the above items [1'] to [15'], wherein the mass ratio of the powder to the treatment liquid B is 0.5 to 1000. [17'] The manufacturing method according to any one of the above items [1'] to [16'], wherein the mass ratio of the total mass of the compound (a'), the compound (a"), and the compound (b') in the treatment liquid A' to the powder is 0.1 mass % or more. [18'] The manufacturing method according to any one of the above items [1'] to [17'], wherein the mixture obtained by mixing the treatment liquid A' and the treatment liquid B forms a gel composition.[19'] A surface-treated powder obtained by the manufacturing method described in any one of [1'] to [18'], [53b'] and [53c'] above. [20'] A cosmetic composition containing the surface-treated powder described in [19'] above.

[0026] [21'] A treatment agent for powder comprising treatment liquid A' and treatment liquid B, wherein treatment liquid A' comprises (a') one or more compounds selected from N-acylglycines or salts thereof, (a") one or more compounds selected from N-acylglutamic acids or salts thereof, (b') one or more compounds selected from fatty acids and salts thereof, and (e) water; and treatment liquid B is (f) an aqueous solution containing metal ions, wherein the metal ions (f) comprise ions of alkaline earth metals or zinc ions. [22'] The treatment agent according to [21'] above, wherein the fatty acids are fatty acids having a carbon chain length of C8 to C22. [23'] The treatment agent according to [21'] or [22'] above, wherein the total concentration of compound (a'), compound (a"), and compound (b') in treatment liquid A' is 5 to 40 mass %. [24'] The treatment agent according to any one of the above [21'] to [23'], wherein the mass proportion of the compound (a') is 5 to 92 mass% relative to the total mass of the compound (a'), compound (a") and compound (b') in the treatment liquid A'. [25'] The treatment agent according to any one of the above [21'] to [24'], wherein the mass proportion of the compound (a") is 3 to 90 mass% relative to the total mass of the compound (a'), compound (a") and compound (b') in the treatment liquid A'. [26'] The treatment agent according to any one of the above [21'] to [25'], wherein the mass proportion of the compound (b') is 5 to 92 mass% relative to the total mass of the compound (a'), compound (a") and compound (b') in the treatment liquid A'. [27'] The treatment agent according to any one of the above [21'] to [26'], wherein the mass proportion of the compound (a') is 5 to 92 mass% and the mass proportion of the compound (a") is 3 to 90 mass% relative to the total mass of the compound (a'), compound (a") and compound (b') in the treatment liquid A'. [28'] The treatment agent according to any one of the above [21'] to [27'], wherein the mass proportion of the compound (a') is 5 to 92 mass% and the mass proportion of the compound (b') is 5 to 92 mass% relative to the total mass of the compound (a'), compound (a") and compound (b') in the treatment liquid A'.[29'] The treatment agent according to any one of the above [21'] to [28'], wherein the mass proportion of the compound (a") is 3 to 90 mass%, and the mass proportion of the compound (b') is 5 to 92 mass%, relative to the total mass of the compound (a'), compound (a") and compound (b') in the treatment liquid A'. [30'] The treatment agent according to any one of the above [21'] to [29'], wherein the mass proportion of the compound (a') is 5 to 92 mass%, the mass proportion of the compound (a") is 3 to 90 mass%, and the mass proportion of the compound (b') is 5 to 92 mass%, relative to the total mass of the compound (a'), compound (a") and compound (b') in the treatment liquid A'. [31'] The treatment agent according to any one of the above [21'] to [30'], wherein the pH of the treatment liquid A' is 7 or higher. [32'] The treatment agent according to any one of the above [21'] to [31'], wherein the mass ratio of the metal ion (f) in the treatment liquid B to the total mass of the compound (a'), compound (a"), and compound (b') in the treatment liquid A' is 0.01 to 1. [33'] The treatment agent according to any one of the above [21'] to [32'], wherein the metal ion (f) includes ions of one or more metals selected from the group consisting of calcium, zinc, and magnesium. [34'] The treatment agent according to any one of the above [21'] to [33'], wherein the treatment liquid B is a weakly acidic, neutral, or alkaline aqueous solution. [35'] The treatment agent according to any one of the above [21'] to [34'], wherein the mass ratio of powder to treatment liquid A' is 0.1 to 200. [36'] The treatment agent according to any one of the above [21'] to [35'], which is used for treatment at a mass ratio of the powder to treatment liquid B of 0.5 to 1000. [37'] The treatment agent according to any one of the above [21'] to [36'], wherein the mass ratio of the total mass of compound (a'), compound (a") and compound (b') in treatment liquid A' to the powder is 0.1 mass% or more. [38'] The treatment agent according to any one of the above [21'] to [37'], wherein a mixture obtained by mixing treatment liquid A' and treatment liquid B forms a gel composition. [39'] A powder that has been surface-treated with the treatment agent according to any one of the above [21'] to [38'], [53d'] and [53e']. [40'] A cosmetic composition containing the powder according to the above [39'].

[0027] [41'] A powder whose surface is coated with a composition containing: (a') one or more compounds selected from N-acylglycines or salts thereof; (a") one or more compounds selected from N-acylglutamic acids or salts thereof; (b') one or more compounds selected from fatty acids and salts thereof; (e) water; and (f) metal ions, wherein the metal ions (f) include ions of alkaline earth metals or zinc ions. [42'] The powder according to [41'] above, wherein the N-acylglycine is an N-acylglycine having an acyl group with a carbon chain length of C8 to C22, or the N-acylglutamic acid is an N-acylglutamic acid having an acyl group with a carbon chain length of C8 to C22. [43'] The powder according to [41'] or [42'] above, wherein the fatty acid is a fatty acid having a carbon chain length of C8 to C22. [44'] The powder according to any one of [41'] to [43'] above, wherein the mass proportion of compound (a') is 5 to 92 mass% with respect to the total mass of compound (a'), compound (a") and compound (b'). [45'] The powder according to any one of [41'] to [44'] above, wherein the mass proportion of compound (a") is 3 to 90 mass% with respect to the total mass of compound (a'), compound (a") and compound (b'). [46'] The powder according to any one of the above [41'] to [45'], wherein the mass proportion of compound (b') is 5 to 92 mass% with respect to the total mass of compound (a'), compound (a") and compound (b'). [47'] The powder according to any one of the above [41'] to [46'], wherein the mass proportion of compound (a') is 5 to 92 mass% and the mass proportion of compound (a") is 3 to 90 mass% with respect to the total mass of compound (a'), compound (a") and compound (b'). [48'] The powder according to any one of the above [41'] to [47'], wherein the mass proportion of compound (a') is 5 to 92 mass% and the mass proportion of compound (b') is 5 to 92 mass% with respect to the total mass of compound (a'), compound (a") and compound (b'). [49'] The powder according to any one of the above items [41'] to [48'], wherein the mass proportion of compound (a") is 3 to 90 mass% and the mass proportion of compound (b') is 5 to 92 mass% relative to the total mass of compound (a'), compound (a"), and compound (b').[50'] The powder according to any one of the above items [41'] to [49'], wherein the mass proportion of compound (a') is 5 to 92 mass%, the mass proportion of compound (a") is 3 to 90 mass%, and the mass proportion of compound (b') is 5 to 92 mass%, relative to the total mass of compound (a'), compound (a"), and compound (b'). [51'] The powder according to any one of the above items [41'] to [50'], wherein the pH of the composition is 7 or higher. [52'] The powder according to any one of the above [41'] to [51'], wherein the mass ratio of component (f) to the total mass of compound (a'), compound (a"), and compound (b') is 0.01 to 1. [53'] The powder according to any one of the above [41'] to [52'], wherein the composition is a gel composition. [53a'] The powder according to any one of the above [41'] to [53'], wherein the masses of compound (a'), compound (a"), and compound (b') obtained by HPLC analysis of an extract obtained by extracting the powder with an aqueous hydrochloric acid solution and ethyl acetate satisfy any one of the mass ratios selected from the following (1) to (7):(1) The mass ratio of compound (a') to the total mass of compound (a'), compound (a"), and compound (b') is 5 to 92 mass%. (2) The mass ratio of compound (a") to the total mass of compound (a'), compound (a"), and compound (b') is 3 to 90 mass%. (3) The mass ratio of compound (b') to the total mass of compound (a'), compound (a"), and compound (b') is 5 to 92 mass%. (4) The mass ratio of compound (a') to the total mass of compound (a'), compound (a"), and compound (b') is 5 to 92 mass% and the mass ratio of compound (a") is 3 to 90 mass%. (5) The mass ratio of compound (a') to the total mass of compound (a'), compound (a"), and compound (b') is 5 to 92 mass% and the mass ratio of compound (b') is 5 to 92 mass%. (6) The mass proportion of compound (a") is 3 to 90 mass%, and the mass proportion of compound (b') is 5 to 92 mass%, relative to the total mass of compound (a'), compound (a"), and compound (b'). (7) The mass proportion of compound (a') is 5 to 92 mass%, and the mass proportion of compound (a") is 3 to 90 mass%, and the mass proportion of compound (b') is 5 to 92 mass%, relative to the total mass of compound (a'), compound (a"), and compound (b'). [53b'] The production method according to any one of the above [1'] to [18'], wherein the N-acylglycine is an N-acylglycine having an acyl group with a carbon chain length of C8 to C22. [53c'] The production method according to any one of the above items [1'] to [18'] and [53b'], wherein the N-acylglutamic acid is an N-acylglutamic acid having an acyl group with a carbon chain length of C8 to C22. [53d'] The treatment agent according to any one of the above items [21'] to [38'], wherein the N-acylglycine is an N-acylglycine having an acyl group with a carbon chain length of C8 to C22. [53e'] The treatment agent according to any one of the above items [21'] to [38'] and [53d'], wherein the N-acylglutamic acid is an N-acylglutamic acid having an acyl group with a carbon chain length of C8 to C22. [53f'] Use of the treatment agent according to any one of the above items [21'] to [38'], [53d'] and [53e'] for producing a surface-treated powder.

[0028] With respect to compound (a'), examples of the acyl component constituting the N-acyl group of N-acylglycine include acyl groups derived or derivable from linear or branched, saturated or unsaturated fatty acids having 8 to 22 carbon atoms, such as single fatty acid acyl groups such as octanoyl, caproyl, nonanoyl, caprinoyl, decanoyl, undecanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, arachidinoyl, behenoyl, palmitoleoyl, oleoyl, and linoleoyl groups, naturally occurring mixed fatty acid acyl groups such as coconut oil fatty acid acyl and hardened beef tallow fatty acid acyl, as well as aromatic carboxylic acid acyl groups such as benzoic acid acyl. While such acyl groups can be derived from fatty acids, they can also be derived from raw materials other than fatty acids (fatty acid esters, fatty acid salts, acid halides, acid anhydrides, etc.). The N-acylglycine may be an N-acylglycine having an acyl group with a carbon chain length of C8 to C22, preferably an N-acylglycine having an acyl group with a carbon chain length of C8 to C20, more preferably an N-acylglycine having an acyl group with a carbon chain length of C8 to C18, and even more preferably an N-acylamino acid having an acyl group with a carbon chain length of C8 to C14. The acyl group of an N-acylamino acid having an acyl group with a carbon chain length of C8 to C22 may be an octanoyl group, decanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, behenoyl group, palmitoleyl group, oleoyl group, linoleoyl group, or coconut oil fatty acyl, of which an octanoyl group, decanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, palmitoleyl group, oleoyl group, or linoleoyl group is preferred, an octanoyl group, decanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, or coconut oil fatty acyl is more preferred, and an octanoyl group, decanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, or coconut oil fatty acyl is even more preferred. Examples of salts of N-acylamino acids include pharmacologically acceptable salts, such as alkali metal salts such as lithium salts, sodium salts, and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; ammonium salts; basic organic salts; and triethanolamine salts.From the viewpoint of solubility, sodium salts, potassium salts, ammonium salts, and triethanolamine salts are preferred, sodium salts and potassium salts are more preferred, and potassium salts are even more preferred. In the case of polybasic acids such as dibasic acids, either monosalts (e.g., monosodium glutamate) or di-salts (e.g., disodium glutamate) can be used. Specific examples of N-acylglycines and salts thereof include octanoylglycine, sodium salt of octanoylglycine, potassium salt of octanoylglycine, decanoylglycine, sodium salt of decanoylglycine, potassium salt of decanoylglycine, lauroylglycine, sodium salt of lauroylglycine, potassium salt of lauroylglycine, myristoylglycine, sodium salt of myristoylglycine, potassium salt of myristoylglycine, palmitoylglycine, sodium salt of palmitoylglycine, potassium salt of palmitoylglycine, stearoylglycine, sodium salt of stearoylglycine, potassium salt of stearoylglycine, oleoylglycine, sodium salt of oleoylglycine, potassium salt of oleoylglycine, linoleoylglycine, sodium salt of linoleoylglycine, potassium salt of linoleoylglycine, coconut oil fatty acylglycine, sodium salt of coconut oil fatty acylglycine, coconut oil fatty Potassium salts of acylglycine are preferred, and octanoylglycine, the sodium salt of octanoylglycine, the potassium salt of octanoylglycine, decanoylglycine, the sodium salt of decanoylglycine, the potassium salt of decanoylglycine, lauroylglycine, the sodium salt of lauroylglycine, the potassium salt of lauroylglycine, myristoylglycine, the sodium salt of myristoylglycine, the potassium salt of myristoylglycine, palmitoylglycine, the sodium salt of palmitoylglycine, the potassium salt of palmitoylglycine, stearoylglycine, the sodium salt of stearoylglycine, the potassium salt of stearoylglycine, cocoylglycine, the sodium salt of cocoylglycine, and the potassium salt of cocoylglycine are more preferred, and octanoylglycine, the sodium salt of octanoylglycine, the potassium salt of octanoylglycine, decanoylglycine, the sodium salt of decanoylglycine,Even more preferred are potassium salt of decanoylglycine, lauroylglycine, sodium salt of lauroylglycine, potassium salt of lauroylglycine, myristoylglycine, sodium salt of myristoylglycine, potassium salt of myristoylglycine, cocoylglycine, sodium salt of cocoylglycine, and potassium salt of cocoylglycine. Preferred examples of N-acylglycine and salts thereof include octanoyl glycine, sodium octanoyl glycine, potassium octanoyl glycine, decanoyl glycine, sodium decanoyl glycine, potassium decanoyl glycine, lauroyl glycine, sodium lauroyl glycine, potassium lauroyl glycine, myristoyl glycine, sodium myristoyl glycine, potassium myristoyl glycine, palmitoyl glycine, sodium palmitoyl glycine, potassium palmitoyl glycine, stearoyl glycine, sodium stearoyl glycine, potassium stearoyl glycine, sodium oleoyl glycine, oleoyl glycine, potassium oleoyl glycine, linoleoyl glycine, sodium linoleoyl glycine, potassium linoleoyl glycine, coconut oil fatty acid acyl glycine, sodium coconut oil fatty acid acyl glycine, and potassium coconut oil fatty acid acyl glycine. More preferred are octanoyl glycine, sodium octanoyl glycine, potassium octanoyl glycine, decanoyl glycine, sodium decanoyl glycine, potassium decanoyl glycine, lauroyl glycine, sodium lauroyl glycine, potassium lauroyl glycine, myristoyl glycine, sodium myristoyl glycine, potassium myristoyl glycine, palmitoyl glycine, sodium palmitoyl glycine, potassium palmitoyl glycine, and stearoyl glycine, sodium stearoyl glycine, potassium stearoyl glycine, cocoyl acyl glycine, sodium cocoyl acyl glycine, and potassium cocoyl acyl glycine, and even more preferred are octanoyl glycine, sodium octanoyl glycine, potassium octanoyl glycine, decanoyl glycine, sodium decanoyl glycine, potassium decanoyl glycine, lauroyl glycine,Examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include sodium lauroyl glycinate, potassium lauroyl glycinate, myristoyl glycine, sodium myristoyl glycinate, potassium myristoyl glycinate, coconut oil fatty acyl glycine, sodium coconut oil fatty acyl glycinate, and potassium coconut oil fatty acyl glycinate. Examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include octanoyl glycine, sodium octanoyl glycinate, potassium octanoyl glycinate, ammonium octanoyl glycinate, triethanolamine octanoyl glycine, decanoyl glycine, sodium decanoyl glycinate, potassium decanoyl glycinate, ammonium decanoyl glycinate, triethanolamine decanoyl glycine, lauroyl glycine, sodium lauroyl glycinate, potassium lauroyl glycinate, ammonium lauroyl glycinate, triethanolamine lauroyl glycine, myristoyl glycine, sodium myristoyl glycinate, potassium myristoyl glycinate, and myristoyl glycine. Alternatively, octanoyl glycine, sodium octanoyl glycine, potassium octanoyl glycine, decanoyl glycine, sodium decanoyl glycine, potassium decanoyl glycine, lauroyl glycine, sodium lauroyl glycine, potassium lauroyl glycine, sodium myristoyl glycine, potassium myristoyl glycine, coconut acyl glycine, sodium coconut acyl glycine, and potassium coconut acyl glycine may be used. The use of these N-acylglycines can improve several properties selected from the hydrophobicity of the treated powder, a pleasant feel, and low-temperature stability as a treatment liquid. The concentration of the compound (a') in the treatment liquid A' is preferably 0.25% by mass or more, more preferably 0.5% by mass or more, even more preferably 1.5% by mass or more, still more preferably 3.5% by mass or more, and particularly preferably 4.0% by mass or more,It is most preferably 5.0% by mass or more. The concentration of compound (a') in treatment liquid A' is preferably 37% by mass or less, more preferably 32% by mass or less, even more preferably 28% by mass or less, particularly preferably 25% by mass or less, and most preferably 20% by mass or less. The concentration of compound (a') in treatment liquid A' may be preferably 0.25 to 37% by mass, more preferably 0.5 to 32% by mass, even more preferably 1.5 to 28% by mass, particularly preferably 4.0 to 25% by mass, and most preferably 5.0 to 20% by mass or less. By adjusting the concentration of compound (a') in treatment liquid A' to such a concentration, it is possible to improve several properties selected from the stability of treatment liquid A' during long-term low-temperature storage, the hydrophobicity of the treated powder when treatment liquid A is used, and the preferable feel.

[0029] With regard to compound (a"), examples of the acyl component constituting the N-acyl group of N-acylglutamic acid include acyl groups derived or derivable from linear or branched, saturated or unsaturated fatty acids having 8 to 22 carbon atoms, such as single fatty acid acyl groups such as octanoyl, caproyl, nonanoyl, caprinoyl, decanoyl, undecanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, arachidinoyl, behenoyl, palmitoleoyl, oleoyl, and linoleoyl groups; naturally occurring mixed fatty acid acyl groups such as coconut oil fatty acid acyl and hardened beef tallow fatty acid acyl; and aromatic carboxylic acid acyl groups such as benzoic acid acyl. Such acyl groups can be derived from fatty acids, but can also be derived from raw materials other than fatty acids (fatty acid esters, fatty acid salts, acid halides, acid anhydrides, etc.). The N-acyl glutamic acid may be an N-acyl glutamic acid having an acyl group with a carbon chain length of C8 to C22, preferably an N-acyl glutamic acid having an acyl group with a carbon chain length of C8 to C20, more preferably an N-acyl glutamic acid having an acyl group with a carbon chain length of C14 to C18, and even more preferably an N-acyl amino acid having an acyl group with a carbon chain length of C16 to C18. The acyl group of the N-acyl amino acid having an acyl group with a carbon chain length of C8 to C22 is preferably an octanoyl group, a decanoyl group, a lauroyl group, a myristoyl group, a palmitoyl group, a stearoyl group, an arachidinoyl group, a palmitoleyl group, an oleoyl group, or a linoleoyl group, more preferably a myristoyl group, a palmitoyl group, or a stearoyl group, and even more preferably a palmitoyl group or a stearoyl group. Examples of salts of N-acylamino acids include pharmacologically acceptable salts, such as alkali metal salts such as lithium salts, sodium salts, and potassium salts; alkaline earth metal salts such as calcium salts and magnesium salts; ammonium salts; and basic organic salts, triethanolamine salts, etc. Among these, from the viewpoint of solubility, sodium salts, potassium salts, ammonium salts, and triethanolamine salts are preferred, sodium salts and potassium salts are more preferred, and sodium salts are even more preferred. In addition, in the case of polybasic acids such as dibasic acids, monosalts (monosodium glutamate, etc.),Specific examples of N-acyl glutamic acid and salts thereof include octanoyl glutamic acid, sodium octanoyl glutamic acid, potassium octanoyl glutamic acid, decanoyl glutamic acid, sodium decanoyl glutamic acid, potassium decanoyl glutamic acid, lauroyl glutamic acid, sodium lauroyl glutamic acid, potassium lauroyl glutamic acid, myristoyl glutamic acid, and sodium myristoyl glutamic acid. Salt, potassium salt of myristoyl glutamic acid, palmitoyl glutamic acid, sodium salt of palmitoyl glutamic acid, potassium salt of palmitoyl glutamic acid, stearoyl glutamic acid, sodium salt of stearoyl glutamic acid, potassium salt of stearoyl glutamic acid, arachidinoyl glutamic acid, sodium salt of arachidinoyl glutamic acid, potassium salt of arachidinoyl glutamic acid, palmitoleic glutamic acid, palmitoleic glutamine Preferred are sodium salts of palmitoleic acid, potassium salt of palmitoleic glutamic acid, oleoyl glutamic acid, sodium salt of oleoyl glutamic acid, potassium salt of oleoyl glutamic acid, linoleoyl glutamic acid, sodium salt of linoleoyl glutamic acid, and potassium salt of linoleoyl glutamic acid, and myristoyl glutamic acid, sodium salt of myristoyl glutamic acid, potassium salt of myristoyl glutamic acid, palmitoyl glutamic acid, palmitoyl Sodium glutamic acid, potassium palmitoyl glutamic acid, stearoyl glutamic acid, sodium stearoyl glutamic acid, and potassium stearoyl glutamic acid are more preferred, and palmitoyl glutamic acid, sodium palmitoyl glutamic acid, potassium palmitoyl glutamic acid, stearoyl glutamic acid, sodium stearoyl glutamic acid, and potassium stearoyl glutamic acid are even more preferred. N-acyl glutamic acid and salts thereof include octanoyl glutamic acid, sodium octanoyl glutamate, disodium octanoyl glutamate, potassium octanoyl glutamate, dipotassium octanoyl glutamate, decanoyl glutamic acid, sodium decanoyl glutamate,Disodium decanoyl glutamate, potassium decanoyl glutamate, dipotassium decanoyl glutamate, lauroyl glutamic acid, sodium lauroyl glutamate, disodium lauroyl glutamate, potassium lauroyl glutamate, dipotassium lauroyl glutamate, myristoyl glutamic acid, sodium myristoyl glutamate, disodium myristoyl glutamate, potassium myristoyl glutamate, dipotassium myristoyl glutamate, palmitoyl glutamic acid, sodium palmitoyl glutamate Palmitoyl glutamate, disodium palmitoyl glutamate, potassium palmitoyl glutamate, dipotassium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, potassium stearoyl glutamate, dipotassium stearoyl glutamate, arachidinoyl glutamic acid, sodium arachidinoyl glutamate, disodium arachidinoyl glutamate, potassium arachidinoyl glutamate, dipotassium arachidinoyl glutamate, palmitoleic glutamic acid, palm Preferred are lumitoleyl glutamate sodium, palmitoleyl glutamate disodium, palmitoleyl glutamate potassium, palmitoleyl glutamate dipotassium, oleoyl glutamate sodium, oleoyl glutamic acid, oleoyl glutamate disodium, oleoyl glutamate potassium, oleoyl glutamate dipotassium, linoleoyl glutamic acid, linoleoyl glutamate sodium, linoleoyl glutamate disodium, linoleoyl glutamate potassium, and linoleoyl glutamate dipotassium. More preferably, myristoyl glutamic acid, sodium myristoyl glutamate, disodium myristoyl glutamate, potassium myristoyl glutamate, dipotassium myristoyl glutamate, palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, potassium palmitoyl glutamate, dipotassium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, potassium stearoyl glutamate,Dipotassium stearoyl glutamate is preferred, and even more preferred are palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, potassium palmitoyl glutamate, dipotassium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, potassium stearoyl glutamate, and dipotassium stearoyl glutamate. Furthermore, examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, potassium palmitoyl glutamate, dipotassium palmitoyl glutamate, ammonium palmitoyl glutamate, triethanolamine palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, potassium stearo ... Alternatively, palmitoyl glutamic acid, sodium palmitoyl glutamate, disodium palmitoyl glutamate, potassium palmitoyl glutamate, dipotassium palmitoyl glutamate, stearoyl glutamic acid, sodium stearoyl glutamate, disodium stearoyl glutamate, potassium stearoyl glutamate, or dipotassium stearoyl glutamate may be used. The use of these N-acyl glutamic acids can improve several properties selected from the hydrophobicity of the treated powder, a pleasant feel, and low-temperature stability of the treatment liquid. The concentration of compound (a") in treatment liquid A' is preferably 0.15% by mass or more, more preferably 0.25% by mass or more, even more preferably 0.5% by mass or more, and particularly preferably 1.0% by mass or more. The concentration of compound (a") in treatment liquid A' is preferably 36% by mass or less, more preferably 20% by mass or less, even more preferably 16% by mass or less, and particularly preferably 10% by mass or less. The concentration of compound (a") in treatment liquid A' isThe concentration of compound (a") in treatment solution A' may be preferably 0.15 to 36% by mass, more preferably 0.25 to 20% by mass, even more preferably 0.5 to 16% by mass, and particularly preferably 1.0 to 10% by mass. By adjusting the concentration of compound (a") in treatment solution A' to such a concentration, it is possible to improve several properties selected from the stability of treatment solution A' during long-term low-temperature storage, the hydrophobicity of the treated powder when treatment solution A is used, and the favorable feel.

[0030] The fatty acid that is compound (b') may be a straight-chain fatty acid or a branched-chain fatty acid, with straight-chain fatty acids being preferred. It may be a saturated or unsaturated fatty acid, with saturated fatty acids being preferred. The fatty acid may be a fatty acid having a carbon chain length of C8 to C22, with fatty acids having a carbon chain length of C8 to C20 being preferred, fatty acids having a carbon chain length of C8 to C18 being more preferred, and fatty acids having a carbon chain length of C8 to C14 being even more preferred. Examples of fatty acids having a carbon chain length of C8 to C22 include octanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, arachidic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, eicosenoic acid, erucic acid, hardened beef tallow fatty acid, coconut oil fatty acid, and palm oil fatty acid. Fatty acids having a carbon chain length of C8 to C22 are preferably octanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, arachidic acid, oleic acid, and coconut oil fatty acid, more preferably octanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, and coconut oil fatty acid, and even more preferably octanoic acid, decanoic acid, lauric acid, myristic acid, and coconut oil fatty acid. Furthermore, salts of fatty acids having a carbon chain length of C8 to C22 include pharmacologically acceptable salts, such as alkali metal salts (e.g., lithium salts, sodium salts, and potassium salts); alkaline earth metal salts (e.g., calcium salts and magnesium salts); ammonium salts; basic organic salts; triethanolamine salts; and the like. Among these, sodium salts, potassium salts, and ammonium salts are preferred from the viewpoint of solubility, with sodium salts and potassium salts being more preferred, and potassium salts being even more preferred. From the viewpoint of stability, the fatty acid having a carbon chain length of C8 to C22 as compound (b') preferably has a partition coefficient of 10 or less, more preferably 8.5 or less. The concentration of compound (b') in treatment solution A' is preferably 0.25% by mass or more, more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, and particularly preferably 2.0% by mass or more.The concentration of compound (b') in treatment liquid A' is preferably 37% by mass or less, more preferably 24% by mass or less, even more preferably 20% by mass or less, and particularly preferably 15% by mass or less. The concentration of compound (b') in treatment liquid A' may be preferably 0.25 to 37% by mass, more preferably 0.5 to 24% by mass, even more preferably 1 to 20% by mass, and particularly preferably 2.0 to 15% by mass or less. Compound (b') in treatment liquid A' may be added to treatment liquid A' as a raw material separately from the other components in treatment liquid A', or may be added to treatment liquid A' as a material contained in a raw material corresponding to the other components in treatment liquid A' (e.g., compound (a') and / or compound (a")).

[0031] The total concentration of compound (a'), compound (a"), and compound (b') in treatment liquid A' is preferably 5 to 40% by mass, more preferably 10 to 35% by mass, even more preferably 10 to 30% by mass, and particularly preferably 20 to 30% by mass. The mass ratio of compound (a') to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A' is preferably 5 to 92% by mass, more preferably 10 to 90% by mass, even more preferably 30 to 80% by mass, and even more preferably 40 to 70% by mass. The mass ratio of compound (a") to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A' is preferably 3 to 90% by mass, more preferably 3 to 50% by mass, even more preferably 5 to 40% by mass, and even more preferably 10 to 40% by mass. The mass proportion of compound (b') relative to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A' is preferably 5 to 92 mass%, more preferably 5 to 60 mass%, even more preferably 10 to 60 mass%, and still more preferably 20 to 50 mass%. In a preferred embodiment, the mass proportion of compound (a') relative to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A' is 5 to 92 mass%, more preferably 10 to 90 mass%, even more preferably 30 to 80 mass%, and even more preferably 40 to 70 mass%, and the mass proportion of compound (a") is 3 to 90 mass%, more preferably 3 to 50 mass%, even more preferably 5 to 40 mass%, and even more preferably 10 to 40 mass%. In another preferred embodiment, the mass proportion of compound (a') relative to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A' is 5 to 92 mass%, more preferably 10 to 90 mass%, even more preferably 30 to 80 mass%, and even more preferably 40 to 70 mass%, and the mass proportion of compound (b') is 5 to 92%, more preferably 5 to 60 mass%, even more preferably 10 to 60 mass%, and even more preferably 20 to 50 mass%.In another preferred embodiment, the mass proportion of compound (a") relative to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A' is 3 to 90 mass%, more preferably 3 to 50 mass%, even more preferably 5 to 40 mass%, and even more preferably 10 to 40 mass%, and the mass proportion of compound (b') is 5 to 92 mass%, more preferably 5 to 60 mass%, even more preferably 10 to 60 mass%, and even more preferably 20 to 50 mass%. In another preferred embodiment, the mass proportion of compound (a') relative to the total mass of compound (a'), compound (a"), and compound (b') in treatment liquid A' is 5 to 92 mass%, more preferably 10 to 90 mass%, even more preferably 30 to 80 mass%, and even more preferably 40 to 70 mass%; the mass proportion of compound (a") is 3 to 90 mass%, more preferably 3 to 50 mass%, even more preferably 5 to 40 mass%, and even more preferably 10 to 40 mass%; and the mass proportion of compound (b') is 5 to 92 mass%, more preferably 3 to 50 mass%, even more preferably 5 to 40 mass%, and even more preferably 10 to 40 mass%.

[0032] Treatment solution A' preferably has a pH of 7.0 or higher, more preferably 8.0 or higher, and even more preferably 8.5 or higher. Treatment solution A' preferably has a pH of 13.0 or lower, more preferably 12.0 or lower, and even more preferably 11.5 or lower. To adjust the pH, aqueous citric acid, aqueous tartaric acid, lactic acid, aqueous malic acid, aqueous succinic acid, aqueous ascorbic acid, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, potassium hydroxide, arginine, lysine, or the like can be used. Preferably, a pH adjuster that does not inhibit the salt formation between compound (a') and / or compound (a") of treatment solution A' and metal ion (f) of treatment solution B is used. More preferably, a pH adjuster that does not chelate metal ion (f) of treatment solution B is used. Lactic acid, aqueous ascorbic acid, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, potassium hydroxide, arginine, or lysine is used more preferably, and sodium hydroxide, potassium hydroxide, or arginine is particularly preferred.

[0033] The mass ratio of the metal ions (f) in treatment solution B to the total mass of the compounds (a'), (a"), and (b') in treatment solution A' is preferably 0.01 to 1, more preferably 0.04 to 0.5, even more preferably 0.06 to 0.35, and particularly preferably 0.08 to 0.25. The mass ratio of the powder to treatment solution B is preferably 0.5 to 1000, more preferably 4 to 500, even more preferably 6 to 250, still more preferably 8 to 160, particularly preferably 13 to 120, and most preferably 20 to 80. The mass ratio of the total mass of the compounds (a'), (a"), and (b') in treatment solution A' to the powder is preferably 0.1 mass% or more, more preferably 0.5 mass% or more, even more preferably 1.0 mass% or more, and particularly preferably 1.5 mass% or more.

[0034] Treatment solution B contains (f) metal ions, and the metal ions (f) include alkaline earth metal ions or zinc ions, preferably alkaline earth metal ions or zinc ions. The metal ions (f) are, for example, magnesium ions, calcium ions, zinc ions, etc. Examples of compounds that generate such ions include magnesium hydroxide, magnesium chloride, magnesium sulfate, magnesium nitrate, magnesium potassium sulfate, calcium hydroxide, calcium chloride, calcium nitrate, calcium acetate, zinc chloride, zinc nitrate, zinc sulfate, and zinc acetate. Treatment solution B preferably contains, as metal ions, ions of one or more metals selected from the group consisting of calcium, zinc, and magnesium, and more preferably contains, as metal ions, ions of one or more metals selected from calcium and zinc. In addition, in powder treated with treatment solution A' and treatment solution B, the effect of treatment solution A', which enhances the antifungal effect, is synergistically enhanced by treatment solution B. Treatment solution B preferably has a transmittance at a wavelength of 660 nm of 60% or more, more preferably 80% or more. By setting the transmittance of treatment liquid B within this range, the hydrophobicity and pleasant feel of the treated powder can be improved. The solids concentration in treatment liquid B is preferably 5 to 60 mass %, more preferably 8 to 55 mass %, and even more preferably 10 to 50 mass %. By setting the solids concentration in treatment liquid B within this range, the treated powder can be treated with the surface treatment agent at a high density, and the hydrophobicity and pleasant feel of the treated powder can be improved.

[0035] In step (i'), treatment liquid A' is used in an amount of 0.5 parts by mass or more, preferably 1 part by mass or more, more preferably 2.5 parts by mass or more, even more preferably 5.0 parts by mass or more, and particularly preferably 7.5 parts by mass or more, relative to 100 parts by mass of powder. Treatment liquid A' is used in an amount of 1000 parts by mass or less, preferably 100 parts by mass or less, more preferably 50 parts by mass or less, even more preferably 40 parts by mass or less, and particularly preferably 30 parts by mass or less, relative to 100 parts by mass of powder. Treatment liquid A' may be used in an amount of 0.5 to 1000 parts by mass, 1 to 100 parts by mass, 2.5 to 50 parts by mass, 5 to 40 parts by mass, 7.5 to 30 parts by mass, or 10 to 25 parts by mass. Using treatment liquid A' in such an amount can improve several properties of the treated powder selected from hydrophobicity, preferable feel, and the like. In step (i'), the mass ratio of the powder to the treatment liquid A' is 0.1 to 200, preferably 1.0 to 100, more preferably 2 to 40, even more preferably 2.5 to 20, and particularly preferably 3.0 to 15. By using the treatment liquid A' in such an amount, it is possible to improve several properties selected from the hydrophobicity of the treated powder, the preferable feel, and the like.

[0036] In step (ii'), the mass ratio of the powder to treatment liquid B is preferably 0.5 to 1000, more preferably 4 to 500, even more preferably 6 to 250, even more preferably 8 to 160, particularly preferably 13 to 120, and most preferably 20 to 80. By using treatment liquid B in such an amount, it is possible to improve several properties selected from the hydrophobicity of the treated powder and the preferable feel to the touch. Treatment liquid B is preferably an aqueous solution having a pH of 9.0 or less, more preferably an aqueous solution having a pH of 8.0 or less, even more preferably an aqueous solution having a pH of 7.5 or less, and even more preferably an aqueous solution having a pH of 7 or less. Treatment liquid B may also be a weakly acidic to alkaline aqueous solution. Specifically, the pH may be 3.0 to 9.0, 3.0 to 8.0, 3.0 to 7.5, 4.0 to 9.0, 4.0 to 8.0, 4.0 to 7.5, 4.5 to 9.0, 4.5 to 8.0, 4.5 to 7.5, 5.0 to 9.0, 5.0 to 8.0, or 5.0 to 7.5. The pH can be adjusted using an aqueous citric acid solution, an aqueous tartaric acid solution, lactic acid, an aqueous malic acid solution, an aqueous succinic acid solution, an aqueous ascorbic acid solution, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, potassium hydroxide, or the like. It is preferable to use a pH adjuster that does not inhibit the salt formation between compound (a'), compound (a"), or compound (b') of treatment solution A' and metal ion (f) of treatment solution B, and it is more preferable to use a pH adjuster that does not chelate metal ion (f) of treatment solution B. It is even more preferable to use lactic acid, an aqueous ascorbic acid solution, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, or potassium hydroxide.

[0037] The powder used in the surface treatment method of the present invention is not particularly limited as long as it is used for industrial purposes or cosmetics (pigments, coloring matters, resins, pearls), and examples thereof include resin powders such as nylon powder, nylon beads, silicone beads, and polyethylene beads; metal oxides such as iron oxide (yellow pigment), iron oxide (red pigment), iron oxide (black pigment), tin oxide, chromium oxide, cobalt oxide, zinc oxide, pigment-grade zinc oxide, titanium oxide, pigment-grade titanium oxide, zirconium oxide, aluminum oxide, cerium oxide, fine particle titanium oxide, ultrafine particle titanium oxide, fine particle zinc oxide, and fine particle iron oxide; silicon-containing powders such as silicon oxides such as silicates (silicate (Al / Ca / Na), silicate (Na / Mg)), sericite, mica, talc, kaolin, bentonite, aluminum silicate, magnesium silicate, cubic sodium aluminosilicate, silicon carbide, hydrous silica, and anhydrous silica (leaf-shaped silica, nonporous silica, porous silica, porous silica, semiporous silica, etc.); Examples of suitable powders include metal fatty acid soaps such as magnesium stearate, magnesium myristate, and zinc stearate, carbon-containing powders such as cellulose, cellulose particles, starch, corn starch, rice starch, potato starch, wheat flour, wood powder, carbon black, graphite, ultramarine, Prussian blue, and carmine; lauroyl lysine; metal salts such as barium sulfate, platy barium sulfate, butterfly-shaped barium sulfate, calcium carbonate, and magnesium carbonate; fluorine-containing powders such as synthetic phlogopite (synthetic mica) and synthetic phlogopite iron; boron-containing powders such as boron nitride; composite powders such as pearl powders, colored pearl pigments, and titanium mica; waxes, pigments, and lakes. Furthermore, the powders may be surface-treated, for example, with silicone, a fluorine compound, a silane coupling agent, a silane, an organic titanate, a fatty acid, a metal soap, an oil, or an amino acid. Crystalline or amorphous powders such as resin powders, silicon-containing powders, metal oxides, carbon-containing powders, fluorine-containing powders, metal salts, boron-containing powders, and composite powders are preferred in terms of improving water repellency and oil repellency after treatment.Preferred powders include, for example, talc, mica, sericite, titanium oxide, red iron oxide, yellow iron oxide, black iron oxide, pearl powder, and colored pearl pigments.

[0038] The treatment of the powder in steps (i') and (ii') may be carried out using a mixer selected from high-speed agitation mixers such as a Henschel mixer, FM mixer, high-shear mixer, vertical mixer, or planetary mixer; container rotation mixers or container rotation mixers with agitators such as a W-type mixer, CV-type mixer, V-type mixer, rocking mixer, container mixer, Bohle mixer, or chopper-equipped container mixer; compression / shear / impact mixers such as a paddle mixer, ribbon agitator, double-shaft paddle mixer, double-shaft planetary agitator, Nauta mixer, conical screw-type mechanical agitator mixer, airflow agitator mixer, Julia mixer, and Nobilta. Furthermore, from the viewpoint of scale-up, etc., the surface treatment agent composition and / or acidic liquid may be mixed by dropwise mixing or spray mixing. From the viewpoint of handling the treated powder, the method for producing the surface-treated powder of the present invention preferably does not include a drying step using power and equipment. In the method for producing a surface-treated powder of the present invention, step (ii') may be performed after step (i'), or step (i') may be performed after step (ii'). Furthermore, either one or both of step (i') and step (ii') may be performed multiple times. Furthermore, at least a portion of step (i') may be performed simultaneously with step (ii'), or at least a portion of step (ii') may be performed simultaneously with step (i').

[0039] The mixture obtained by mixing treatment liquid A' and treatment liquid B forms a gel-like composition with less squeaky feeling, and can improve several properties of the treated powder selected from smooth feel, good spreadability, etc. The mixture obtained by mixing treatment liquid A' and treatment liquid B forms a smooth gel-like composition on the surface of the powder, and thus it is possible to produce a treated powder whose surface is coated with a smooth gel-like composition.

[0040] The powder obtained by the method for producing a surface-treated powder of the present invention or the powder surface-treated with the treatment agent of the present invention can also be said to be a powder whose surface is coated with a composition containing the (a') one or more compounds selected from N-acylglycines or salts thereof, the (a") one or more compounds selected from N-acylglutamic acids or salts thereof, the (b') one or more compounds selected from fatty acids and salts thereof, the (e) water, and the (f) metal ions (including alkaline earth metal ions or zinc ions). The characteristics of each component in this powder can be the same as those of the corresponding component described above. The compound (a') N-acylglycine is preferably an N-acylglycine having an acyl group with a carbon chain length of C8 to C22. The compound (a") N-acylglutamic acid is preferably an N-acylglutamic acid having an acyl group with a carbon chain length of C8 to C22. Furthermore, the fatty acid compound (b') preferably has a carbon chain length of C8 to C22. The powder obtained by the method for producing a surface-treated powder of the present invention, or the powder surface-treated with the treatment agent of the present invention, or the surface-coated powder is excellent in multiple properties selected from among hydrophobicity, favorable feel, and the like. Furthermore, by using the powder obtained by the method for producing a surface-treated powder of the present invention in a cosmetic composition, the stability and SPF value of the composition may be improved.

[0041] In the surface-coated powder, the mass ratio of the total mass of compound (a'), compound (a"), and compound (b') in the composition to the powder is preferably 0.1 mass% or more, more preferably 0.5 mass% or more, even more preferably 1.0 mass% or more, and particularly preferably 1.5 mass% or more. In the surface-coated powder, the mass ratio of compound (a') in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 5 mass% or more, more preferably 10 mass% or more, even more preferably 30 mass% or more, and particularly preferably 40 mass% or more. The mass ratio is preferably 92 mass% or less, more preferably 90 mass% or less, even more preferably 80 mass% or less, and particularly preferably 70 mass% or less. The mass ratio may be preferably 5 to 92% by mass, more preferably 10 to 90% by mass, even more preferably 30 to 80% by mass, and particularly preferably 40 to 70% by mass. By setting the mass ratio within such a range, it is possible to improve several properties selected from the hydrophobicity and pleasant feel of the surface-coated powder. Furthermore, in the surface-coated powder, the mass ratio of compound (a") in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 3% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more. The mass ratio is preferably 90% by mass or less, more preferably 50% by mass or less, and even more preferably 40% by mass or less. The mass ratio may be preferably 3 to 90% by mass, more preferably 5 to 50% by mass, and even more preferably 10 to 40% by mass. By setting the mass ratio within this range, it is possible to improve several properties selected from the hydrophobicity of the powder whose surface is coated and the pleasant feel of the powder.Furthermore, in the surface-coated powder, the mass ratio of compound (b') in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 5 mass% or more, more preferably 10 mass% or more, and even more preferably 20 mass% or more. The mass ratio is preferably 92 mass% or less, more preferably 90 mass% or less, even more preferably 60 mass% or less, and particularly preferably 50 mass% or less. The mass ratio may be preferably 5 to 92 mass%, more preferably 5 to 90 mass%, even more preferably 10 to 60 mass%, and particularly preferably 20 to 50 mass%.

[0042] Furthermore, the mass ratio of compound (a') in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 5 mass% or more, more preferably 10 mass% or more, even more preferably 30 mass% or more, and particularly preferably 40 mass% or more. The mass ratio is preferably 92 mass% or less, more preferably 90 mass% or less, even more preferably 80 mass% or less, and particularly preferably 70 mass% or less. The mass ratio may be preferably 5 to 92 mass%, more preferably 10 to 90 mass%, even more preferably 30 to 80 mass%, and particularly preferably 40 to 70 mass%. Furthermore, The mass ratio of compound (a") in the composition relative to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 3% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more. The mass ratio is preferably 90% by mass or less, more preferably 50% by mass or less, and even more preferably 40% by mass or less. The mass ratio may be preferably 3 to 90% by mass, more preferably 5 to 50% by mass, and even more preferably 10 to 40% by mass. By setting the mass ratio within such a range, it is possible to improve several properties selected from the hydrophobicity of the powder having a surface coated thereon and a preferable feel to the touch. The mass ratio of compound (a') in the composition relative to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 30% by mass or more, and particularly preferably 40% by mass or more. The mass percentage is preferably 92% by mass or less, more preferably 90% by mass or less, even more preferably 80% by mass or less, and particularly preferably 70% by mass or less. The mass percentage may be preferably 5 to 92% by mass, more preferably 10 to 90% by mass, even more preferably 30 to 80% by mass, and particularly preferably 40 to 70% by mass.Furthermore, the mass ratio of compound (b') in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 5 mass% or more, more preferably 10 mass% or more, and even more preferably 20 mass% or more. The mass ratio is preferably 92 mass% or less, more preferably 90 mass% or less, even more preferably 60 mass% or less, and particularly preferably 50 mass% or less. The mass ratio may be preferably 5 to 92 mass%, more preferably 5 to 90 mass%, even more preferably 10 to 60 mass%, and particularly preferably 20 to 50 mass%. By setting the mass ratio in such a range, it is possible to improve multiple properties of the surface-coated powder selected from the hydrophobicity of the powder, preferable feel, and the like.

[0043] Furthermore, in the surface-coated powder, the mass ratio of compound (a") in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 3 mass% or more, more preferably 5 mass% or more, and even more preferably 10 mass% or more. The mass ratio is preferably 90 mass% or less, more preferably 50 mass% or less, and even more preferably 40 mass% or less. The mass ratio may be preferably 3 to 90 mass%, more preferably 5 to 50 mass%, and even more preferably 10 to 40 mass%. Furthermore, the mass ratio of compound (b') in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 5 mass% or more, more preferably 10 mass% or more, and even more preferably 20 mass% or more. The mass ratio is preferably 92 mass% or less, more preferably 90 mass% or less, even more preferably 60 mass% or less, and particularly preferably 50 mass% or less. The mass ratio may be preferably 5 to 92 mass%, more preferably 5 to 90 mass%, even more preferably 10 to 60 mass%, and particularly preferably 20 to 50 mass%. By setting the mass ratio in such a range, it is possible to improve multiple properties of the surface-coated powder selected from the hydrophobicity of the powder, preferable feel, and the like. Furthermore, the mass ratio of compound (a') in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 5 mass% or more, more preferably 10 mass% or more, even more preferably 30 mass% or more, and particularly preferably 40 mass% or more. The mass ratio is preferably 92 mass% or less, more preferably 90 mass% or less, even more preferably 80 mass% or less, and particularly preferably 70 mass% or less. The mass ratio may be preferably 5 to 92 mass%, more preferably 10 to 90 mass%, even more preferably 30 to 80 mass%, and particularly preferably 40 to 70 mass%.Furthermore, the mass proportion of compound (a") in the composition relative to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 3 mass% or more, more preferably 5 mass% or more, and even more preferably 10 mass% or more. The mass proportion is preferably 90 mass% or less, more preferably 50 mass% or less, and even more preferably 40 mass% or less. The mass proportion may be preferably 3 to 90 mass%, more preferably 5 to 50 mass%, and even more preferably 10 to 40 mass%. Furthermore, the mass ratio of compound (b') in the composition to the total mass of compound (a'), compound (a"), and compound (b') in the composition is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 20% by mass or more. The mass ratio is preferably 92% by mass or less, more preferably 90% by mass or less, even more preferably 60% by mass or less, and particularly preferably 50% by mass or less. The mass ratio may be preferably 5 to 92% by mass, more preferably 5 to 90% by mass, even more preferably 10 to 60% by mass, and particularly preferably 20 to 50% by mass. By setting the mass ratio in such a range, it is possible to improve multiple properties selected from the hydrophobicity of the powder and the preferable feel of the powder. The mass ratios of compound (a'), compound (a"), and compound (b') in the composition of the surface-coated powder can be measured, for example, by high performance liquid chromatography (HPLC). Specifically, the mass proportions of compound (a'), compound (a"), and compound (b') can be calculated from the peak areas of these compounds detected using high performance liquid chromatography (column: reverse phase column, temperature: 40°C, eluent: methanol / 30 mM NaHPO (pH = 2.5) = 85 / 15 (v / v), detection: 220 nm).The mass ratio of the total mass of compound (a'), compound (a"), and compound (b') in the composition of the surface-coated powder to the mass of the surface-coated powder is preferably 0.1 mass% or more, more preferably 0.3 mass% or more, even more preferably 0.7 mass% or more, and particularly preferably 1.0 mass% or more. The mass ratio is preferably 10 mass% or less, more preferably 8.5 mass% or less, even more preferably 6.5 mass% or less, and particularly preferably 5.0 mass% or less. The mass ratio may be preferably 0.1 to 10.0 mass%, more preferably 0.3 to 8.5 mass%, even more preferably 0.7 to 6.5 mass%, and particularly preferably 1.0 to 5.0 mass%. The mass ratio can be calculated by measuring the masses of compound (a'), compound (a"), and compound (b') obtained by extraction with aqueous hydrochloric acid and ethyl acetate.

[0044] Cosmetic compositions containing powder obtained by the method for producing a surface-treated powder of the present invention, or cosmetic compositions containing powder surface-treated with the treating agent of the present invention, or the surface-coated powder, can be formulated into any form of cosmetic that can be applied to desired areas (e.g., skin, hair, scalp, lips, eyes, eyelashes, eyelids, nails) using conventional methods. Examples of cosmetics for skin, lips, eyelashes, and nails include sunscreens such as sunscreens, body powders, and sprays; makeup cosmetics such as foundations, primers, body colors, bronzers, face powders, nail polishes, cheek colors, makeup bases, and concealers; lip cosmetics such as lip colors, lip liners, and lipsticks; eye makeup cosmetics such as eyeliners, eye shadows, eyebrow products, and mascaras; leave-on cosmetics such as emulsions, lotions, creams, gels, and serums; and face masks. Examples of cosmetics for hair include hair styling agents, hair emulsions, hair treatments, hair conditioners, and hair lotions. Examples of cosmetics for the scalp include hair growth agents. Preferred cosmetics include makeup cosmetics, eye makeup cosmetics, lip cosmetics, and leave-on cosmetics. Preferred topical preparations include ointments, creams, mousses, and gels.

[0045] In addition to compound (a'), compound (a"), compound (b'), compound (e), and compound (f), various base materials can be used in combination with the cosmetic raw material composition of this embodiment depending on the application and purpose, as long as the object of the present invention is not impaired. Specific examples include natural gums such as gum arabic and gum tragacanth, glucosides such as saponin, cellulose derivatives such as methylcellulose, carboxycellulose, and hydroxymethylcellulose, natural polymers such as lignin sulfonates and shellac, dispersants such as anionic polymers such as polyaspartates, polyacrylates, salts of styrene-acrylic acid copolymers, salts of vinylnaphthalene-maleic acid copolymers, sodium salts of β-naphthalenesulfonic acid formalin condensates, and phosphates, and nonionic polymers such as polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene glycol;

[0046] Higher fatty acid salts (soaps), salts of higher fatty acids having 8 to 22 carbon atoms in the hydrophobic group, and N-acylamino acid anionic surfactants: the acyl group may be derived or be derivable from a linear or branched, saturated or unsaturated fatty acid having 8 to 22 carbon atoms, such as octanoyl, caproyl, nonanoyl, caprinoyl, decanoyl, undecanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, arachidinoyl, behenoyl, palmitoleoyl, oleoyl, or linoleoyl, or a natural mixed fatty acid acyl group such as coconut oil fatty acid acyl or hydrogenated beef tallow fatty acid acyl, or an aromatic carboxylic acid acyl group such as benzoic acid acyl. While such acyl groups can be derived from fatty acids, they can also be derived from raw materials other than fatty acids (such as fatty acid esters, fatty acid salts, acid halides, and acid anhydrides).The constituent amino acids include the above-mentioned acidic amino acids such as aspartic acid, or amino acids such as alanine, valine, leucine, isoleucine, proline, methionine, cysteine, tryptophan, tyrosine, phenylalanine, asparagine, glutamine, serine, threonine, oxyproline, β-aminopropionic acid, γ-aminobutyric acid, anthranilic acid, m-aminobenzoic acid, and p-aminobenzoic acid, or salts thereof, alkyl ether carboxylates, amide ether carboxylates, alkyl sulfates (AS), polyoxyethylene alkyl ether sulfates (AES), alkyl ether sulfates, sulfates of higher fatty acid esters, sulfates of higher fatty acid alkylolamides, sulfated oils and fats, ... Anionic surfactants such as ethylene styrenated phenyl ether sulfate, alpha-olefin sulfonate (AOS), alkylbenzene sulfonate, alkylnaphthalene sulfonate, alkyl sulfonate (SAS), dialkyl sulfosuccinate, alpha-sulfonated fatty acid salt, alkane sulfonate, sulfonate of higher fatty acid ester, alpha-sulfonated fatty acid salt, sulfonate of higher fatty acid amide, N-acyl-N-alkyl taurate, N-acyl-N-methyl taurate, alkyl phosphate, alkyl ether phosphate, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkylphenyl ether phosphate, naphthalene sulfonate formalin condensate, etc.;

[0047] Amino acid type amphoteric surfactants such as sodium cocoamphoacetate, sodium lauroamphoacetate, and disodium cocoamphodiacetate; carbobetaine types such as alkylamidobetaine; sulfobetaine types such as alkylsulfobetaine and alkylhydroxysulfobetaine; phosphobetaine types such as laurylhydroxyphosphobetaine; betaine type amphoteric surfactants such as cocamidopropyl betaine, lauramidopropyl betaine, myristamidopropyl betaine, pearl nucleus fatty acid amidopropyl betaine, and aminoacetic acid betaine types such as lauryl betaine; lauramine amphoteric surfactants such as amine oxide amphoteric surfactants such as lauramidopropylamine oxide, cocoamine oxide, myristamidopropylamine oxide, and cocamidopropylamine oxide; saponins such as lecithin and lysolecithin, quillaja saponin, soybean saponin, yucca saponin, sophora japonin, beet saponin, adzuki bean saponin, carrot saponin, tea seed saponin, loofah saponin, and Centella asiatica saponin; and natural amphoteric surfactants such as lanolin, sodium surfactin, phospholipids, cholesterol, and bile acids;

[0048] Steareth-2, Steareth-3, Steareth-8, Steareth-10, Steareth-11, Steareth-15, Steareth-20, Steareth-21, Ceteareth-12, Ceteareth-20, Ceteareth-25, Ceteth-3, Ceteth-6, Ceteth-10, Ceteth-15, Ceteth-20, Ceteth-25, Ceteth-30, Trideceth-6, Trideceth-9, Trideceth-10, Trideceth-12, Beheneth-5, Beheneth-10, Beheneth-20, Beheneth-30, Laureth-2, Laureth-3, Laureth-4, Laureth-7, Laureth-9, Laureth Polyoxyethylene alkyl ethers such as -21, laureth-23, laureth-25, laureth-30, isosteareth-20, isoceteth-10, isoceteth-20, isoceteth-25, octyldodeceth-16, octyldodeceth-20, oleth-2, oleth-10, octyldodeceth-25, (C12-14)s-pareth-5, (C12-14)s-pareth-7, (C12-14)s-pareth-9, (C12-14)pareth-3, (C12-14)pareth-5, (C12-14)pareth-7, and (C12-14)pareth-12, PEG-5 olefins, Polyoxyethylene phytosterols such as phytosterol, PEG-10 phytosterol, PEG-20 phytosterol, and PEG-30 phytosterol, polyoxyethylene cholesterols such as cholesterol-10 and cholesterol-24, polyoxyethylene cholestanol, polyoxyethylene lanolin, polyoxyethylene reduced lanolin, PPG-2-deceth-7, PPG-2-deceth-12, PPG-2-deceth-30, PPG-4 ceteth-20, PPG-8 ceteth-20, PPG-6 decyltetradeceth-12, and PPG-6 decyltetradeceth deceth-20, PPG-6 decyltetradeceth-30, polyoxyethylene-polyoxypropylene hydrogenated lanolin, polyoxyethylene-polyoxypropylene alkyl ethers such as polyoxyethylene-polyoxypropylene glycerin ether, (poly)glycerin polyoxypropylene glycols such as PPG-9 diglyceryl, POEPOP glycol (196 E.O.) (67 P.O.), POEPOP glycol (20 E.O.) (20 P.O.), POEPOP glycol (42 E.O.) (67 P.O.) (poloxamer 403),Polyoxyethylene polyoxypropylene glycols such as POEPOP glycol (54 E.O.) (39 P.O.) (poloxamer 235), POEPOP glycol (124 E.O.) (39 P.O.), POEPOP glycol (160 E.O.) (30 P.O.), POEPOP glycol (200 E.O.) (70 P.O.), and POEPOP glycol (30 E.O.) (150 P.O.), PEG-6 isostearate, PEG-8 isostearate, PEG-10 isostearate, and PEG-12 isostearate, PEG-2 laurate, PEG-4 laurate, PEG-12 laurate, PEG-2 stearate, PEG-4 stearate, PEG-9 stearate, PEG-10 stearate, PEG-20 stearate, PEG-23 stearate, PEG-25 stearate, PEG-32 stearate, PEG-40 stearate, PEG-45 stearate, PEG-55 stearate, PEG-75 stearate, PEG-100 stearate, PEG-140 stearate, PEG-150 stearate, PEG-1 distearate Polyoxyethylene fatty acid esters such as PEG-50, polyoxyethylene propylene glycol fatty acid esters, PEG-3 glyceryl isostearate, PEG-5 glyceryl isostearate, PEG-6 glyceryl isostearate, PEG-8 glyceryl isostearate, PEG-15 glyceryl isostearate, PEG-20 glyceryl isostearate, PEG-25 glyceryl isostearate, PEG-30 glyceryl isostearate, PEG-60 glyceryl isostearate, PEG- triisostearate Polyoxyethylene polyhydric alcohol fatty acid esters such as PEG-5 glyceryl, PEG-10 glyceryl triisostearate, PEG-20 glyceryl triisostearate, polyglyceryl-3 diisostearate, polyglyceryl-10 diisostearate, PEG-7 glyceryl coconut oil fatty acid, PEG-5 glyceryl stearate, PEG-15 glyceryl stearate, sorbeth-30 tetraoleate, sorbeth-40 tetraoleate, and sorbeth-60 tetraoleate, polyoxyethylene glycerin monoisostearate,Polyoxyethylene glycerin fatty acid esters such as polyoxyethylene monooleate, such as polyoxyethylene glycerin triisostearate, PEG-10 hydrogenated castor oil, PEG-20 hydrogenated castor oil, PEG-30 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-60 hydrogenated castor oil, PEG-80 hydrogenated castor oil, PEG-100 hydrogenated castor oil, POE hydrogenated castor oil monoisostearate, POE hydrogenated castor oil triisostearate, POE hydrogenated castor oil monopyroglutamic acid mono Isostearate diester, polyoxyethylene hydrogenated castor oil derivatives such as POE hydrogenated castor oil maleic acid, polyoxyethylene castor oil derivatives such as POE castor oil 3, POE castor oil 4, POE castor oil 6, POE castor oil 7, POE castor oil 10, POE castor oil 13.5, POE castor oil 17, POE castor oil 20, POE castor oil 25, POE castor oil 30, POE castor oil 35, POE castor oil 50, polysorbate 20, polysorbate 40, polysorbate 60, poly Polyoxyethylene sorbitan fatty acid esters such as sorbate 65, polysorbate 80, polysorbate 85, etc.; polyoxyethylene sorbitol monolaurate, polyoxyethylene sorbitol monooleate, polyoxyethylene sorbitol pentaoleate, polyoxyethylene sorbitol monostearate, etc.; polyoxyethylene glycerin fatty acid esters such as POE glycerin monostearate, POE glycerin monoisostearate, POE glycerin triisostearate, etc.; polyoxyethylene alkylphenyl ethers such as POE (10) nonylphenyl ether, polyoxyethylene polystyrylphenyl ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene fatty acid alkanolamides, polyoxyalkylene alkylglucosides, polyoxyalkylene hydrogenated castor oils, polyoxyalkylene castor oils,

[0049] Polyoxyalkylene alkylamines, polyoxyalkylene alkylphenyl ethers, polyoxyethylene fatty acid mono- and diesters such as polyethylene glycol diisostearate, polyoxyethylene monooleate, and polyoxyethylene dioleate, polyoxyethylene animal and vegetable oils such as polyoxyethylene methyl glucoside fatty acid esters, polyoxyethylene alkyl ether fatty acid esters, and polyoxyethylene sorbitol beeswax, glyceryl stearate, glyceryl isostearate, and glyceryl palmitate, Glycerin fatty acid partial esters such as glyceryl myristate, glyceryl oleate, glyceryl behenate, glyceryl coconut oil fatty acid, glycerin monocottonseed oil fatty acid, glycerin monoerucate, glycerin sesquioleate, α,α'-oleic acid pyroglutamic acid glycerin, glycerin monostearate malic acid, polyglyceryl-2 stearate, polyglyceryl-3 stearate, polyglyceryl-4 stearate, polyglyceryl-5 stearate, polyglyceryl-6 stearate, polyglyceryl-8 stearate, stearic acid Polyglyceryl-10, Polyglyceryl-6 Distearate, Polyglyceryl-10 Distearate, Polyglyceryl-2 Tristearate, Polyglyceryl-10 Pentastearate, Polyglyceryl-10 Decastearate, Polyglyceryl-2 Isostearate, Polyglyceryl-3 Isostearate, Polyglyceryl-4 Isostearate, Polyglyceryl-5 Isostearate, Polyglyceryl-6 Isostearate, Polyglyceryl-8 Isostearate, Polyglyceryl-10 Isostearate, Polyglyceryl Diisostearate 2, Polyglyceryl-3 diisostearate, Polyglyceryl-10 diisostearate, Polyglyceryl-2 triisostearate, Polyglyceryl-2 tetraisostearate, Polyglyceryl-10 pentaisostearate, Polyglyceryl-10 decaisostearate, Polyglyceryl-2 oleate, Polyglyceryl-3 oleate, Polyglyceryl-4 oleate, Polyglyceryl-5 oleate, Polyglyceryl-6 oleate, Polyglyceryl-8 oleate, Polyglyceryl-10 oleate, Polyglyceryl-6 dioleate,Polyglyceryl-2 trioleate, polyglyceryl-10 pentaoleate, polyglyceryl-10 decaoleate, polyglyceryl-2 laurate, polyglyceryl-3 laurate, polyglyceryl-4 laurate, polyglyceryl-5 laurate, polyglyceryl-6 laurate, polyglyceryl-8 laurate, polyglyceryl-10 laurate, polyglyceryl-5 myristate, polyglyceryl-6 myristate, polyglyceryl-10 myristate, polyglyceryl-3 polyricinoleate, polyglyceryl-6 polyricinoleate, etc. Polyglycerin fatty acid esters, ethylene glycol mono-fatty acid esters such as ethylene glycol monostearate, propylene glycol mono-fatty acid esters such as propylene glycol monostearate, pentaerythritol partial fatty acid esters, sorbitol partial fatty acid esters, maltitol partial fatty acid esters, maltitol ethers, diglycerol sorbitan penta-2-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate, coconut fatty acid sorbitan, laurate sorbitan, oleic acid sorbitan Sorbitan fatty acid esters such as sorbitan, sorbitan stearate, sorbitan isostearate, sorbitan olivate, sorbitan sesquiisostearate, sorbitan sesquioleate, sorbitan sesquistearate, sorbitan trioleate, sorbitan tristearate, and sorbitan palmitate; sucrose distearate, sucrose stearate, sucrose palmitate, sucrose laurate, and sucrose polystearate; methyl glucoside fatty acid esters; trehalose undecylenate; Partial esters of sugar derivatives such as sucrose, octyl glucoside, nonyl glucoside, decyl glucoside, dodecyl glucoside, myristyl glucoside, palmityl glucoside, (C12-20) alkyl glucoside, arachidyl glucoside, arachyl glucoside, (caprylyl / capryl) glucoside, cetearyl glucoside, coconut oil alkyl glucoside, alkyl glycosides such as lauryl glucoside, alkyl polyglycosides, lanolin alcohols, reduced lanolins, polyoxyethylene propylene glycol fatty acid esters, cocamide DEA,Fatty acid alkanolamides such as cocamide MEA, lauramide DEA, lauramide MEA, lauramide MIPA, palmamide MEA, palmamide DEEA, and cocamide methyl MEA; POE beeswax and lanolin derivatives such as POE sorbitol beeswax; polyglycerin alkyl ethers such as polyglyceryl-4 lauryl ether; alkyl glyceryl ethers such as isostearyl glyceryl ether, chimyl alcohol, selachyl alcohol, and batyl alcohol; polyhydric alcohol alkyl ethers; tetrapolyoxyethylene and tetrapolyoxypropylene-ethylenediamine condensates; saponin; natural surfactants such as sophorolipids; polyoxyethylene nonionic surfactants such as ethanolamine fatty acid amides, polyoxyethylene alkylamines, sugar amine acylation products, triethanolamine fatty acid partial esters, fatty acid alkylolamides, and alkylamine oxides; alkyldimethylamine oxides such as lauramine oxide, cocamine oxide, stearamine oxide, and behenamine oxide; alkylethoxydimethylamine oxides, polyoxyethylene alkyl mercaptans, polyether-modified silicones such as dimethicone copolyol, and silicone-based nonionic surfactants such as polysiloxane-oxyalkylene copolymers, polyglycerin-modified silicones, and sugar-modified silicones;

[0050] Alkyltrimethylammonium chlorides such as behentrimonium chloride, steartrimonium chloride, cetrimonium chloride, and lauryltrimonium chloride; alkyltrimethylammonium bromides such as stearyltrimonium bromide; alkyltrimethylammonium methosulfates such as cetrimonium methosulfate and behentrimonium methosulfate; dialkyltrimethylammonium chlorides such as distearyldimonium chloride, dicocodimonium chloride, dialkyl (C12-18)dimonium chloride, and quaternium-18 alkyl dimethyl ammonium chloride; fatty acid amidoamines such as stearamidopropyl dimethylamine, stearamidoethyl diethylamine, and behenamidopropyl dimethylamine and their salts; alkyl ether amines such as stearoxypropyl dimethylamine and their salts, or quaternary salts such as stearoxypropyltrimonium chloride and behenyl PG trimonium chloride; fatty acid ethyl sulfates such as long-chain branched fatty acid (12-31) aminopropylethyl dimethyl ammonium sulfate, and lanolin fatty acid aminopropylethyl dimethyl ammonium sulfate fatty acid amide-type quaternary ammonium salts; dialkyl ester-type quaternary salts such as dicocoyl ethyl hydroxyethylmonium methosulfate and distearoyl ethyl hydroxyethylmonium methosulfate; polyoxyethylene alkylamines and their salts or quaternary salts; alkylamine salts; trialkylbenzyl ammonium salts; fatty acid amide guanidium salts; alkyl ether ammonium salts; alkyl trialkylene glycol ammonium salts; benzalkonium salts such as benzalkonium chloride; benzethonium salts; pyridinium salts such as cetylpyridinium chloride; imidazolinium salts; trialkylbenzyl ammonium salts; alkyl hydroxyethyl imidazolinium salts; alkyl isoquinolinium salts; dialkyl morpholinium salts; polyamine fatty acid derivatives; silicone-based cationic surfactants such as amino-modified silicones such as aminopropyl dimethicone and amodimethicone, cation-modified silicones, cation-modified and polyether-modified silicones, and amino-modified and polyether-modified silicones; amino acid-based cationic surfactants such as cocoyl arginine ethyl PCA;Cationic surfactants such as tertiary amines such as PPG-1 / PEG-1 stearamine;

[0051] Polymer surfactants such as sodium alginate, starch derivatives, gum tragacanth, polyvinyl alcohol, and acrylic acid / alkyl methacrylate copolymers;

[0052] Monohydric alcohols (e.g., ethanol, propanol, isopropyl alcohol, butanol, etc.); dihydric alcohols (e.g., ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2-butene-1,4-diol, isopentyl diol, hexylene glycol, octylene glycol, ethylhexylglycerin, 1,2-pentanediol, etc.); trihydric alcohols (e.g., glycerin, trimethylolpropane, etc.); tetrahydric alcohols (e.g., pentaerythritol, such as 1,2,6-hexanetriol, etc.); pentahydric alcohols (e.g., xylitol, etc.); hexahydric alcohols (e.g., sorbitol, mannitol, etc.); polyhydric alcohols Polymers (e.g., diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, polyglycerin, etc.); dihydric alcohol alkyl ethers (e.g., ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono-2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, etc.);Dihydric alcohol alkyl ethers (e.g., diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol butyl ether, etc.); dihydric alcohol ether esters (e.g., ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diadipate, ethylene glycol disuccinate, diethylene glycol monoethyl ether acetate, diethylene glycol monomethyl ... polyhydric alcohols such as glycerin monoalkyl ethers (e.g., xyl alcohol, selachyl alcohol, batyl alcohol, etc.); sugar alcohols (e.g., sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, starch-decomposed sugars, maltose, xylitose, starch-decomposed sugar-reduced alcohols, etc.); glysolid; tetrahydrofurfuryl alcohol; POE-tetrahydrofurfuryl alcohol; POP-butyl ether; POP.POE-butyl ether; tripolyoxypropylene glycerin ether; POP-glycerin ether; POP-glycerin ether phosphate; POP.POE-pentaneerythritol ether; polyglycerin; and the like;

[0053] Avocado oil, almond oil, camellia seed oil, argania spinosa kernel oil, apricot kernel oil, rosa canina fruit oil, canola oil, kukui nut oil, passionflower seed oil, cranberry seed oil, black currant seed oil, pomegranate seed oil, cottonseed oil, sclerocarya birrea seed oil, grape seed oil, camellia oil, evening primrose oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, hybrid safflower oil, hybrid sunflower oil, baobab seed oil, peanut oil, pistachio oil, sunflower seed oil, hazelnut oil, mango seed oil, meadowfarm oil, mozzarella Liquid oils and fats such as perilla kernel oil, European raspberry seed oil, borage seed oil, horseradish seed oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, rice germ oil, triglycerin, glycerin trioctanoate, glycerin triisopalmitate, glycerin triisooctanoate, and glyceryl tri-2-ethylhexanoate cholesterol fatty acid ester; solid oils and fats such as cocoa butter, coconut oil, horse fat, hydrogenated coconut oil, palm oil, beef tallow, mutton tallow, hydrogenated beef tallow, palm kernel oil, lard, beef bone fat, Japan wax kernel oil, hydrogenated oil, beef trotter fat, Japan wax, hydrogenated castor oil, Astrocaryum rumuru seed oil, African mango kernel oil, shea butter, and Theobroma grandiflorum seed oil;

[0054] Hydrocarbons such as paraffin, liquid paraffin, heavy liquid paraffin, light liquid paraffin, petrolatum, ceresin, microcrystalline wax, isoparaffin, ozokerite, squalene, pristane, squalane, isododecane, and isohexadodecane; waxes such as beeswax, spermaceti, lanolin, carnauba wax, candelilla wax, cotton wax, bayberry wax, ivory wax, montan wax, rice bran wax, koji wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, hydrogenated jojoba oil, reduced lanolin, jojoba wax, hard lanolin, shellac wax, polyoxyethylene cholesterol ether, polyoxyethylene lanolin alcohol ether, polyoxyethylene lanolin alcohol acetate, lanolin fatty acid polyethylene glycol, polyoxyethylene hydrogenated lanolin alcohol ether, and derivatives thereof;

[0055] Higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, behenic acid, undecylenic acid, 12-hydroxystearic acid, palmitoleic acid, oleic acid, lanolin fatty acid, hard lanolin fatty acid, soft lanolin fatty acid, linoleic acid, linolenic acid, erucic acid, docosahexaenoic acid, eicosapentaenoic acid, isohexadecanoic acid, anteisohenicosanoic acid, 12-hydroxystearic acid, long-chain branched fatty acids, dimer acids, hydrogenated dimer acids, and their aluminum salts, calcium salts, magnesium salts, zinc salts, potassium salts, and other metal soaps, and nitrogen-containing derivatives such as amides; lauryl alcohol Chole, myristyl alcohol, cetanol, cetearyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, jojoba alcohol, chimyl alcohol, selachyl alcohol, batyl alcohol, lanolin alcohol, hydrogenated lanolin alcohol; higher alcohols such as hexyldecanol, octyldodecanol, decyltetradecanol, hexyldecanol, isostearyl alcohol, 2-octyldodecanol, and dimer diol; higher alcohols and derivatives such as arachidyl alcohol and arachyl alcohol; sterols such as cholesterol and phytosterol;

[0056] Isopropyl myristate, butyl stearate, ethylhexyl stearate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, isostearyl isostearate, isopropyl isostearate, ethyl isostearate, octyldodecyl isostearate, cholesteryl isostearate, isostearate Hydrogenated castor oil phosphate, phytosteryl isostearate, hexyldecyl isostearate, isotridecyl isononanoate, isononyl isononanoate, ethylhexyl isononanoate, stearyl ethylhexanoate, glyceryl (ethylhexanoate / stearate / adipic acid), cetyl ethylhexanoate, cetearyl ethylhexanoate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, propylene glycol dicaprylate, dicapryl PG (capric acid / capric acid), PG dicaprate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glycerin tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl-2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, glycerin tri-2-heptylundecanoate Lid, castor oil fatty acid methyl ester, ethyl oleate, cetostearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, diisopropyl adipate, N-lauroyl-L-glutamic acid 2-octyldodecyl ester, di-2-heptylundecyl ethyl laurate adipate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate,Ester oils such as ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, and alkyl benzoate (C12-15);

[0057] Volatile and non-volatile silicones such as dimethylpolysiloxane, polyether-modified silicone, alcohol-modified silicone, methylphenylpolysiloxane, epoxy-modified silicone, fluorine-modified silicone, alkyl-modified silicone, alkoxy-modified silicone, amino-modified silicone, polymeric silicone, volatile silicone, and cyclic silicone; polyols such as glycerin, diglycerin, polyglycerin, 1,3-butanediol, propanediol, and polyethylene glycol;

[0058] moisturizing agents such as alkylglycines such as N-methylglycine, N,N-dimethylglycine, N,N,N-trimethylglycine, N-ethylglycine, and glycylbetaine; (poly)saccharides such as sorbitol, raffinose, pyrrolidone carboxylates, lactates, hyaluronates, ceramides, trehalose, xylobiose, maltose, sucrose, glucose, and vegetable mucilage polysaccharides, and derivatives thereof; glycosaminoglycans and salts thereof such as water-soluble chitin, chitosan, pectin, and chondroitin sulfate and salts thereof; amino acids and salts thereof such as glycine, serine, threonine, alanine, aspartic acid, tyrosine, valine, leucine, arginine, glutamine, and prophosphate; sugar amino acid compounds such as aminocarbonyl reactants; plant extracts such as aloe vera, marronnier, and the like; urea, uric acid, ammonia, glucosamine, creatinine, and nucleic acid-related substances such as DNA and RNA;

[0059] Water-soluble and oil-soluble polymers such as hydroxyethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyltrimethylammonium chloride ether, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, methylhydroxypropyl cellulose, soluble starch, carboxymethyl starch, methyl starch, propylene alginate, glycol esters, polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl methyl ether, carboxyvinyl polymers, polyacrylates, guar gum, locust bean gum, quince seed, carrageenan, galactan, gum arabic, pectin, mannan, starch, xanthan gum, dextran, succinoglucan, curdlan, hyaluronic acid, gelatin, casein, albumin, collagen, methoxyethylene maleic anhydride copolymers, amphoteric methacrylate copolymers, polydimethylmethylene piperidinium chloride, polyacrylic acid ester copolymers, polyvinyl acetate, nitrocellulose, silicones, and resins;

[0060] thickening and foam-increasing ingredients such as cationic cellulose derivatives, cationic starch, cationic guar gum derivatives, diallyl quaternary ammonium salt / acrylamide copolymers, quaternized polyvinylpyrrolidone derivatives, quaternized vinylpyrrolidone / vinylimidazole polymers, polyglycol / amine condensates, quaternized collagen polypeptides, polyethyleneimine, cationic silicone polymers, adipic acid / dimethylaminohydroxypropyldiethylenetriamine copolymers, polyaminopolyamides, cationic chitin derivatives, cationic polymers such as quaternized polymers, polyethylene glycol fatty acid esters, polyoxyethylene fatty acid ester methylglycosides, and tetradecene sulfonates;

[0061] Oil gelling agents such as dextrin fatty acid esters, glycerin fatty acid esters, and hydroxystearic acid; sequestering agents such as ethylenediaminetetraacetic acid and its salts, hydroxyethylenediaminetriacetic acid and its salts, phosphoric acid, ascorbic acid, succinic acid, gluconic acid, polyphosphates, metaphosphates, and hinokitils;

[0062] antiseptics and antibacterial agents such as parahydroxybenzoic acid esters, benzoic acid and its salts, phenoxyethanol, hinokitiol, salicylic acid and its salts, sorbic acid and its salts, dehydroacetic acid and its salts, parachlormetacresol, hexachlorophene, boric acid, resorcinol, tribromosalan, orthophenylphenol, thiram, photosensitizer No. 201, halocarban, trichlorocarbanide, tocopherol acetate, zinc pyrithione, phenol, isopropylmethylphenol, 2,4,4-trichloro-2-hydroxyphenol, hexachlorophene, chlorhexidine, benzethonium chloride, benzalkonium chloride, cetylpyridinium chloride, dequalinium chloride, stearyldimethylammonium chloride, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, methylbenzethonium chloride, lauryltrimethylammonium chloride, lauroylcholaminoformylmethylpyridinium chloride, triclosan, and Biosol;

[0063] pH adjusters such as citric acid, malic acid, adipic acid, glutamic acid, and aspartic acid; other anti-dandruff and anti-itch agents such as trichlorocarbanilide, salicylic acid, zinc pyrithione, isopropylmethyl, and phenol;

[0064] Benzoic acid-based ultraviolet absorbers such as para-aminobenzoic acid, para-aminobenzoic acid monoglycerin ester, N,N-dipropoxypara-aminobenzoic acid ethyl ester, N,N-diethoxypara-aminobenzoic acid ethyl ester, N,N-dimethylpara-aminobenzoic acid ethyl ester, N,N-dimethylpara-aminobenzoic acid butyl ester, and N,N-dimethylpara-aminobenzoic acid ethyl ester; anthranilic acid-based ultraviolet absorbers such as homomenthyl-N-acetylanthranilate; salicylic acid-based ultraviolet absorbers such as salicylic acid and its sodium salt, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanolphenyl salicylate; octyl cinnamate, ethyl- cinnamic acid-based ultraviolet absorbers such as 4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxycinnamate, 2-ethylhexyl-p-methoxycinnamate (octyl para-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate (cinoxate), cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate (octocurine), glyceryl mono-2-ethylhexanoyl-di-para-methoxycinnamate, ferulic acid and its derivatives;2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4- Benzophenone-based ultraviolet absorbers such as methoxybenzophenone (oxybenzone-3), 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, and 4-hydroxy-3-carboxybenzophenone; 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole; 2-(2'-hydroxy-5'-methylphenylbenzotriazole); dibenzalazine; dianisoylmethane; 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one; dibenzoylmethane derivatives such as 4-t-butylmethoxydibenzoylmethane; octyl triazone; urocanic acid derivatives such as urocanic acid and ethyl urocanate; ultraviolet absorbers such as 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 1-(3,4-dimethoxyphenyl)-4,4-dimethyl-1,3-pentanedione, hydantoin derivatives such as 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidinepropionate, phenylbenzimidazol sulfonic acid, terephthalylidene dicamphor sulfonic acid, drometrizole trisiloxane, methyl anthranilate, rutin and its derivatives, and oryzanol and its derivatives;

[0065] Ascorbic acid and its salts (alkali metal salts or alkaline earth metal salts such as sodium salt, potassium salt, magnesium salt, calcium salt, etc., as well as ammonium salt, amino acid salt, etc.), ascorbic acid derivatives (L-ascorbic acid alkyl ester, L-ascorbic acid phosphate ester and its salt, L-ascorbic acid-2-sulfate ester and its salt, L-ascorbic acid glucoside, etc.), alkoxysalicylic acid and its salt (alkoxy groups include, for example, methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group, etc.), , isobutoxy group, etc.), whitening agents such as hydroquinone glycosides and their derivatives (arbutin, etc.), kojic acid and its derivatives, ellagic acid, chamomile extract, althea extract, licorice extract, mulberry bark extract, raspberry extract, apple flavonoids, bran extract, vitamin E and its derivatives, hinokitiol, placenta extract, rucinol, chamomilla ET, glutathione, clove extract, tea extract, astaxanthin, bovine placenta extract, tranexamic acid and its derivatives, resorcinol derivatives, azulene, and gamma-hydroxybutyric acid;

[0066] Blood circulation promoters such as Swertia japonica extract, cepharanthine, vitamin E and its derivatives, and gamma oryzanol; local stimulants such as capsicum tincture, angelica rhododendron tincture, cantharides tincture, and nicotinic acid benzyl ester; nutrients such as various vitamins and amino acids; female hormones; hair root activators;

[0067] Anti-inflammatory agents such as ricyrrhetic acid, glycyrrhizic acid derivatives, allantoin, azulene, aminocaproic acid, and hydrocortisone; astringents such as zinc oxide, zinc sulfate, allantoin hydroxyaluminum, aluminum chloride, aluminum sulfate, zinc sulfocarbonate, tannic acid, citric acid, and lactic acid; refreshing agents such as menthol and camphor; antihistamines such as diphenhydramine hydrochloride, chlorpheniramine maleate, and glycyrrhizic acid derivatives;

[0068] Antioxidants such as tocopherols, BHA, BHT, gallic acid, and NDGA; sebum suppressants such as estradiol, estrone, and ethinylestradiol; exfoliants and dissolvers for keratin such as sulfur, salicylic acid, and resorcinol; alpha-hydroxy acids such as glycolic acid, lactic acid, malic acid, tartaric acid, and citric acid; and beta-hydroxy acids such as salicylic acid.

[0069] Purified water, other ingredients: kakyō extract, N-methyl-L-serine, whey, nicotinamide, diisopropylamine dichloroacetic acid, mevalonic acid, gamma-aminobutyric acid (including gamma-amino-β-hydroxybutyric acid), althaea extract, aloe extract, apricot kernel extract, turmeric extract, oolong tea extract, dried seawater, hydrolyzed wheat powder, hydrolyzed silk, carrot extract, cucumber extract, gentian extract, yeast extract, rice germ oil, comfrey extract, soapwort extract, di It can contain oak extract, lithospermum root extract, birch extract, peppermint extract, swertia japonica extract, bisabolol, propolis, loofah extract, linden extract, hop extract, horse chestnut extract, soapberry extract, melissa extract, eucalyptus extract, saxifrage extract, rosemary extract, Roman chamomile extract, royal jelly extract, seaweed, rice bran, licorice, tangerine peel, angelica tree, crushed peach leaf, sphingolipids, guai, azulene, vitamin C, etc.

[0070] Another aspect of the present invention is a surface treatment agent for powders, comprising one or more N-acylamino acids or salts thereof. In this aspect, the N-acylamino acid may be one or more selected from N-acylalanine, N-acyltreonine, N-acylglutamic acid, N-acylproline, N-acylarginine, and N-acyllysine. The surface treatment agent of this aspect may further contain a nonionic surfactant. The pH of the surface treatment agent of this aspect is preferably 7 or higher.

[0071] Another aspect of the present invention is a surface treatment agent for powders, comprising one or more selected from N-acylalanine, N-acyl-N-methyl-β-alanine, N-acyl-N-methyltaurine, N-acylsarcosine, cocoamphoacetic acid, and metal salts thereof. The surface treatment agent of this aspect may further comprise a nonionic surfactant, a cationic surfactant, and / or an amphoteric surfactant. The surface treatment agent of this aspect may also have the features of the above-described aspects of the present invention.

[0072] Yet another aspect of the present invention may be as follows: A surface treatment agent for powder, wherein the compound (a''') comprises one or more selected from N-acylalanine, N-acyl-N-methyl-β-alanine, N-acylsarcosine, N-acylproline, N-acyl-N-methyltaurine, alkylbetaine, or a salt thereof.

[0073] In this embodiment, the acyl group or alkyl group of compound (a'") preferably has a carbon chain length of C8 to C22. The salt of compound (a'") is preferably a metal salt or a triethanolamine salt, more preferably a sodium salt, a potassium salt, or a triethanolamine salt. Another embodiment of the present invention may be as follows. [54'] A method for producing a surface-treated powder, comprising: (i'') a step of treating a powder with a treatment liquid A'', and (ii'') a step of treating a powder with a treatment liquid B'', wherein the treatment liquid A'' contains (a''') one or more compounds selected from N-acylalanine, N-acyl-N-methyl-β-alanine, N-acylsarcosine, N-acylproline, N-acyl-N-methyltaurine, alkylbetaine, or salts thereof, and (e) water; and the treatment liquid B'' is (f') an aqueous solution containing one or more components selected from metal ions and acids, and when component (f') contains a metal ion, the metal ion contains an alkaline earth metal ion or a zinc ion. [55'] The production method according to [54'] above, wherein the treatment liquid A'' further contains (g) one or more compounds selected from amphoteric surfactants, nonionic surfactants, or salts thereof. [56'] The method for producing according to the above [55'], wherein compound (g) comprises one or more nonionic surfactants selected from polyoxyethylene condensation type, polyhydric alcohol ester type, and polyhydric alcohol condensation type. [57'] The method for producing according to the above [55'], wherein compound (g) comprises one or more amphoteric surfactants selected from amino acid type, betaine type, amine oxide type, and natural amphoteric surfactants. [58'] The method for producing according to any one of the above [54'] to [57'], wherein treatment liquid A" further comprises (b") one or more compounds selected from fatty acids and salts thereof. [59'] The method for producing according to the above [58'], wherein the fatty acid comprises a fatty acid having a carbon chain length of C8 to C22. [60'] The method according to any one of [54'] to [59'] above, wherein the treatment solution A'' contains N-acylalanine and / or N-acyl-N-methyl-β-alanine as the compound (a'').[61'] The manufacturing method according to any one of the above items [54'] to [60'], wherein the acyl group or alkyl group of compound (a'") has a carbon chain length of C8 to C22. [62'] The manufacturing method according to any one of the above items [54'] to [61'], wherein the total concentration of compound (a'"), compound (b"), and compound (g) in treatment liquid A" is 5 to 40 mass %. [63'] The manufacturing method according to any one of the above items [54'] to [62'], wherein the pH of treatment liquid A" is 7 or higher. [64'] The manufacturing method according to any one of the above items [54'] to [63'], wherein the mass ratio of component (f') of treatment liquid B" to the total mass of compound (a'"), compound (b"), and compound (g) in treatment liquid A" is 0.01 to 1. [65'] The manufacturing method according to any one of the above items [54'] to [64'], wherein the component (f') comprises one or more selected from the group consisting of calcium, zinc, magnesium, and citric acid. [66'] The manufacturing method according to any one of the above items [54'] to [65'], wherein the treatment liquid B" is an acidic, neutral, or alkaline aqueous solution. [67'] The manufacturing method according to any one of the above items [54'] to [66'], wherein the mass ratio of the powder to the treatment liquid A" is 0.1 to 200. [68'] The manufacturing method according to any one of the above items [54'] to [67'], wherein the mass ratio of the powder to the treatment liquid B" is 0.5 to 1000. [69'] The manufacturing method according to any one of the above items [54'] to [68'], wherein the mass ratio of the total mass of the compound (a'''), the compound (b"), and the compound (g) in the treatment liquid A" to the powder is 0.1 mass% or more. [70'] The manufacturing method according to any one of the above items [54'] to [69'], wherein the mixture obtained by mixing the treatment liquid A" and the treatment liquid B" forms a gel composition. [71'] The manufacturing method according to any one of the above items [54'] to [70'], wherein the contact angle of the mixture obtained by mixing the treatment liquid A" and the treatment liquid B" is 90° or less. [72'] The manufacturing method according to any one of the above items [54'] to [71'], wherein the shear adhesive strength of the mixture obtained by mixing the treatment liquid A" and the treatment liquid B" is 3000 Pa or more.[73'] The manufacturing method according to any one of the above items [54'] to [72'], wherein the mixture obtained by mixing treatment liquid A" and treatment liquid B" has a dynamic friction coefficient of 0.4 or more. [74'] A surface-treated powder obtained by the manufacturing method according to any one of the above items [54'] to [73']. [75'] A cosmetic composition containing the surface-treated powder according to the above item [74'].

[0074] [76'] A powder surface treatment agent comprising treatment liquid A" and treatment liquid B", wherein treatment liquid A" comprises (a''') one or more compounds selected from N-acylalanine, N-acyl-N-methyl-β-alanine, N-acylsarcosine, N-acylproline, N-acyl-N-methyltaurine, alkylbetaine, or salts thereof, and (e) water; and treatment liquid B" is (f') an aqueous solution containing one or more components selected from metal ions and acids, and when component (f') contains a metal ion, the metal ion comprises an alkaline earth metal ion or a zinc ion. [77'] The powder surface treatment agent according to [76'] above, wherein treatment liquid A" further comprises (g) one or more compounds selected from amphoteric surfactants, nonionic surfactants, or salts thereof. [78'] The powder surface treatment agent according to the above [77'], wherein compound (g) comprises one or two or more nonionic surfactants selected from polyoxyethylene condensation types, polyhydric alcohol ester types, and polyhydric alcohol condensation types. [79'] The powder surface treatment agent according to the above [77'], wherein compound (g) comprises one or two or more amphoteric surfactants selected from amino acid types, betaine types, amine oxide types, and natural amphoteric surfactants. [80'] The powder surface treatment agent according to any one of the above [76'] to [79'], wherein treatment liquid A" further comprises (b") one or two or more compounds selected from fatty acids and salts thereof. [81'] The powder surface treatment agent according to the above [80'], wherein the fatty acid of component (b") comprises a fatty acid having a carbon chain length of C8 to C22. [82'] The powder surface treatment agent according to any one of the above [76'] to [81'], wherein the treatment liquid A'' contains N-acylalanine and / or N-acyl-N-methyl-β-alanine as compound (a'''). [83'] The powder surface treatment agent according to any one of the above [76'] to [82'], wherein the acyl group or alkyl group of compound (a''') has a carbon chain length of C8 to C22. [84'] The powder surface treatment agent according to any one of the above [76'] to [83'], wherein the total concentration of compound (a'''), compound (b'') and compound (g) in treatment liquid A'' is 5 to 40 mass%.[85'] The powder surface treatment agent according to any one of the above [76'] to [84'], wherein the treatment liquid A" has a pH of 7 or higher. [86'] The powder surface treatment agent according to any one of the above [76'] to [85'], wherein the mass ratio of component (f') of treatment liquid B" to the total mass of compound (a'"), compound (b"), and compound (g) in treatment liquid A" is 0.01 to 1. [87'] The powder surface treatment agent according to any one of the above [76'] to [86'], wherein component (f') comprises one or more selected from calcium, zinc, magnesium, and citric acid. [88'] The powder surface treatment agent according to any one of the above [76'] to [87'], wherein treatment liquid B" is an acidic, neutral, or alkaline aqueous solution. [89'] The powder surface treatment agent according to any one of the above [76'] to [88'], which is used to treat a powder having a mass ratio to treatment liquid A" of 0.1 to 200. [90'] The powder surface treatment agent according to any one of the above [76'] to [89'], which is used to treat a powder having a mass ratio to treatment liquid B" of 0.5 to 1000. [91'] The powder surface treatment agent according to any one of the above [76'] to [90'], which is used to treat a powder having a mass ratio of 0.1% or more of the powder to the total mass of compound (a'"), compound (b"), and compound (g) in treatment liquid A". [92'] The powder surface treatment agent according to any one of the above [76'] to [91'], which is used to treat a powder having a mass ratio of 0.1% or more of the powder to the total mass of compound (a'"), compound (b"), and compound (g) in treatment liquid A". [93'] The powder surface treatment agent according to any one of the above [76'] to [92'], wherein the contact angle of the mixture obtained by mixing the treatment liquid A" and the treatment liquid B" is 90° or less. [94'] The powder surface treatment agent according to any one of the above [76'] to [93'], wherein the shear adhesive force of the mixture obtained by mixing the treatment liquid A" and the treatment liquid B" is 3000 Pa or more. [95'] The powder surface treatment agent according to any one of the above [76'] to [94'], wherein the dynamic friction coefficient of the mixture obtained by mixing the treatment liquid A" and the treatment liquid B" is 0.4 or more. [96'] A surface-treated powder that has been surface-treated with the powder surface treatment agent according to any one of the above [76'] to [95']. [97'] A cosmetic composition containing the powder according to the above [96'].[98'] Use of the powder surface treatment agent according to any one of the above items [76'] to [95'] for producing a hydrophilic surface-treated powder. [99'] Use of the powder surface treatment agent according to any one of the above items [76'] to [95'] for producing a surface-treated powder having a contact angle of less than 90°.

[0075] [100'] A surface-treated powder, the surface of which is coated with a composition comprising: (a''') one or more compounds selected from N-acylalanine, N-acyl-N-methyl-β-alanine, N-acylsarcosine, N-acylproline, N-acyl-N-methyltaurine, alkylbetaine, or salts thereof; (e) water; and (f') one or more components selected from metal ions and acids, wherein component (f') comprises an ion of an alkaline earth metal, a zinc ion, or a citrate ion. [101'] The surface-treated powder according to [100'] above, wherein the composition further comprises (b'') one or more compounds selected from fatty acids and salts thereof. [102'] The surface-treated powder according to [100'] or [101'] above, wherein the fatty acid of compound (b'') is a fatty acid having a carbon chain length of C8 to C22. [103'] The surface-treated powder according to any one of the above items [100'] to [102'], further comprising (g) one or more compounds selected from nonionic surfactants or amphoteric surfactants. [104'] The surface-treated powder according to the above item [103'], wherein compound (g) comprises one or more nonionic surfactants selected from polyoxyethylene condensation types, polyhydric alcohol ester types, and polyhydric alcohol condensation types. [105'] The surface-treated powder according to the above item [103'], wherein compound (g) comprises one or more amphoteric surfactants selected from amino acid types, betaine types, amine oxide types, and natural amphoteric surfactants. [106'] The surface-treated powder according to any one of the above items [100'] to [105'], wherein component (f') comprises one or more species selected from the group consisting of calcium, zinc, magnesium, and citric acid. [107'] The surface-treated powder according to any one of the above items [100'] to [106'], wherein the mass ratio of the total mass of compound (a'"), compound (b"), and compound (g) in the composition to the powder is 0.1% or more. [108'] The surface-treated powder according to any one of the above items [100'] to [107'], wherein the composition forms a gel composition. [109'] The surface-treated powder according to any one of the above items [100'] to [108'], wherein the contact angle of the composition is 90° or less.[110'] The surface-treated powder according to any one of the above items [100'] to [109'], wherein the shear adhesive strength of the composition is 3000 Pa or more. [111'] The surface-treated powder according to any one of the above items [100'] to [110'], wherein the dynamic friction coefficient of the composition is 0.4 or more. [112'] The surface-treated powder according to any one of the above items [74'], [96'], and [100'] to [111'], wherein the contact angle is reduced by 30% or more compared to the corresponding untreated powder. [113'] The surface-treated powder according to any one of the above items [74'], [96'], and [100'] to [112'], wherein the contact angle is reduced by 30% or more compared to the corresponding untreated powder when the corresponding untreated powder is hydrophilic, and wherein the contact angle is reduced by 70% or more compared to the corresponding untreated powder when the corresponding untreated powder is hydrophobic. [114'] The surface-treated powder according to [113'] above, wherein the contact angle of the corresponding untreated powder is less than 90° when the corresponding untreated powder is hydrophilic, and the contact angle of the corresponding untreated powder is 90° or more when the corresponding untreated powder is hydrophobic. [115'] The surface-treated powder according to any one of [100'] to [114'] above, wherein the acyl group or alkyl group of compound (a''') has a carbon chain length of C8 to C22. [116'] The surface-treated powder according to any one of [100'] to [115'] above, wherein compound (a''') comprises N-acylalanine and / or N-acyl-N-methyl-β-alanine. [117'] Use of the surface-treated powder according to any one of [74'], [96'], and [100'] to [116'] for incorporation into an aqueous cosmetic preparation.

[0076] Examples of the acyl component constituting compound (a'"') include acyl groups derived or derivable from linear or branched, saturated or unsaturated fatty acids having 8 to 22 carbon atoms, such as single fatty acid acyl groups such as octanoyl, caproyl, nonanoyl, caprinoyl, decanoyl, undecanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, arachidinoyl, behenoyl, palmitoleoyl, oleoyl, and linoleoyl, natural mixed fatty acid acyl groups such as coconut oil fatty acid acyl groups and hardened beef tallow fatty acid acyl groups, as well as aromatic carboxylic acid acyl groups such as benzoic acid acyl groups. While such acyl groups can be derived from fatty acids, they can also be derived from raw materials other than fatty acids (fatty acid esters, fatty acid salts, acid halides, acid anhydrides, etc.). The acyl moiety may be an acyl group having a carbon chain length of from C8 to C22, with an acyl group having a carbon chain length of from C8 to C20 being preferred, an acyl group having a carbon chain length of from C8 to C18 being more preferred, and an acyl group having a carbon chain length of from C8 to C14 being even more preferred. The acyl group having a carbon chain length of C8 to C22 may be an octanoyl group, decanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, behenoyl group, palmitoleyl group, oleoyl group, linoleoyl group, or coconut oil fatty acid acyl group, of which an octanoyl group, decanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, palmitoleyl group, oleoyl group, linoleoyl group, or coconut oil fatty acid acyl group is preferred, an octanoyl group, decanoyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, or coconut oil fatty acid acyl group is more preferred, and an octanoyl group, caproyl group, decanoyl group, lauroyl group, myristoyl group, or coconut oil fatty acid acyl group is even more preferred. Examples of the alkyl component constituting compound (a''') include alkyl groups derived or derivable from linear or branched, saturated or unsaturated fatty acids having 8 to 22 carbon atoms, such as octyl, capryl, nonyl, decyl, undecyl, dodecyl, tridecyl, myristyl, cetyl, stearyl, oleyl, linolyl, nonadecyl, arachidyl, eicosyl, behenyl, and coconut oil alkyl groups.The alkyl component may be an alkyl group having a carbon chain length of C8 to C22, preferably an alkyl group having a carbon chain length of C8 to C20, more preferably an alkyl group having a carbon chain length of C8 to C18, and even more preferably an alkyl group having a carbon chain length of C8 to C14. The alkyl group having a carbon chain length of C8 to C22 may be an octyl group, capryl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, myristyl group, cetyl group, stearyl group, oleyl group, linolyl group, nonadecyl group, arachidyl group, eicosyl group, behenyl group, or coconut oil alkyl group, and may be an octyl group, capryl group, nonyl group, decyl group, undecyl group, dodecyl group, tridecyl group, myristyl group, cetyl group, stearyl group, oleyl group, linolyl group, nonadecyl group, arachidyl group, eicosyl group, behenyl group, or coconut oil alkyl group.

[0039] Preferred are octyl, capryl, nonyl, decyl, undecyl, dodecyl, tridecyl, myristyl, cetyl, stearyl, oleyl, linolyl, and coconut alkyl groups, more preferred are octyl, capryl, nonyl, decyl, undecyl, dodecyl, tridecyl, myristyl, and coconut alkyl groups, even more preferred are octyl, capryl, nonyl, decyl, undecyl, dodecyl, tridecyl, myristyl, and coconut alkyl groups. Salts of compound (a'"') include pharmacologically acceptable salts, etc., such as alkali metal salts (lithium salt, sodium salt, potassium salt, etc.); alkaline earth metal salts (calcium salt, magnesium salt, etc.); ammonium salt; basic organic salts; triethanolamine salt, etc. Among these, from the viewpoint of solubility, sodium salts, potassium salts, ammonium salts, and triethanolamine salts are preferred, sodium salts, potassium salts, and triethanolamine salts are more preferred, and sodium salts are even more preferred. In the case of polybasic acids such as dibasic acids, either monosalts (e.g., monosodium glutamate) or di-salts (e.g., disodium glutamate) can be used.

[0077] Specific examples of N-acylalanine and salts thereof constituting compound (a''') include octanoylalanine, sodium salt of octanoylalanine, potassium salt of octanoylalanine, triethanolamine salt of octanoylalanine, decanoylalanine, sodium salt of decanoylalanine, potassium salt of decanoylalanine, triethanolamine salt of decanoylalanine, lauroylalanine, sodium salt of lauroylalanine, potassium salt of lauroylalanine, triethanolamine salt of lauroylalanine, myristoylalanine, Myristoylalanine sodium salt, myristoylalanine potassium salt, myristoylalanine triethanolamine salt, palmitoylalanine, palmitoylalanine sodium salt, palmitoylalanine potassium salt, palmitoylalanine triethanolamine salt, stearoylalanine, stearoylalanine sodium salt, stearoylalanine potassium salt, stearoylalanine triethanolamine salt, oleoylalanine, oleoylalanine sodium salt, oleoylalanine potassium salt, linoleoylalanine Preferred are octanoylalanine, the sodium salt of linoleoylalanine, the potassium salt of linoleoylalanine, the triethanolamine salt of linoleoylalanine, coconut oil fatty acid acylalanine, the sodium salt of coconut oil fatty acid acylalanine, the potassium salt of coconut oil fatty acid acylalanine, and the triethanolamine salt of coconut oil fatty acid acylalanine, and also octanoylalanine, the sodium salt of octanoylalanine, the potassium salt of octanoylalanine, the triethanolamine salt of octanoylalanine, decanoylalanine, the sodium salt of decanoylalanine, and decanoylalanine. potassium salt of decanoylalanine, triethanolamine salt of decanoylalanine, lauroylalanine, sodium salt of lauroylalanine, potassium salt of lauroylalanine, triethanolamine salt of lauroylalanine, myristoylalanine, sodium salt of myristoylalanine, potassium salt of myristoylalanine, triethanolamine salt of myristoylalanine, palmitoylalanine, sodium salt of palmitoylalanine, potassium salt of palmitoylalanine, triethanolamine salt of palmitoylalanine, stearoylalanine,Sodium salt of stearoylalanine, potassium salt of stearoylalanine, triethanolamine salt of stearoylalanine, coconut oil fatty acid acylalanine, sodium salt of coconut oil fatty acid acylalanine, potassium salt of coconut oil fatty acid acylalanine, and triethanolamine salt of coconut oil fatty acid acylalanine are more preferred, and octanoylalanine, sodium salt of octanoylalanine, potassium salt of octanoylalanine, triethanolamine salt of octanoylalanine, decanoylalanine, sodium salt of decanoylalanine, and decanoylalanine are more preferred. Even more preferred are potassium salts, triethanolamine salts of decanoylalanine, lauroylalanine, sodium salts of lauroylalanine, potassium salts of lauroylalanine, triethanolamine salts of lauroylalanine, myristoylalanine, sodium salts of myristoylalanine, potassium salts of myristoylalanine, triethanolamine salts of myristoylalanine, coconut acylalanine, sodium salts of coconut acylalanine, potassium salts of coconut acylalanine, and triethanolamine salts of coconut acylalanine. Examples of N-acylalanines and salts thereof include octanoylalanine, octanoylalanine sodium, octanoylalanine potassium, octanoylalanine triethanolamine, decanoylalanine, decanoylalanine sodium, decanoylalanine potassium, decanoylalanine triethanolamine, lauroylalanine, lauroylalanine sodium, lauroylalanine potassium, lauroylalanine triethanolamine, myristoylalanine, myristoylalanine sodium, myristoylalanine potassium, myristoylalanine triethanolamine, palmitoylalanine, palmitoylalanine sodium, palmitoylalanine potassium, palmitoylalanine triethanolamine, stearoylalanine, stearoylalanine sodium, stearoylalanine potassium, stearoylalanine triethanolamine, oleoylalanine sodium, oleoylalanine, oleoylalanine potassium, oleoylalanine triethanolamine, linoleoylalanine, and linoleoylalanine sodium.Linoleoyl alanine potassium, linoleoyl alanine triethanolamine, coconut oil fatty acid acyl alanine, coconut oil fatty acid acyl alanine sodium, coconut oil fatty acid acyl alanine potassium, coconut oil fatty acid acyl alanine triethanolamine and the like are preferred, and more preferred are octanoyl alanine, octanoyl alanine sodium, octanoyl alanine potassium, octanoyl alanine triethanolamine, decanoyl alanine, decanoyl alanine sodium, decanoyl alanine potassium, decanoyl alanine triethanolamine, lauroyl alanine, lauroyl alanine sodium, lauroyl alanine potassium, lauroyl alanine triethanolamine, myristoyl alanine, myristoyl alanine sodium, myristoyl alanine potassium, myristoyl alanine triethanolamine, palmitoyl alanine, palmitoyl alanine sodium, palmitoyl alanine triethanolamine, stearoyl alanine, and stearoyl alanine and coconut oil fatty acid acylalanine, coconut oil fatty acid acylalanine sodium, coconut oil fatty acid acylalanine potassium, coconut oil fatty acid acylalanine triethanolamine, and particularly preferred are octanoylalanine, octanoylalanine sodium, octanoylalanine potassium, octanoylalanine triethanolamine, decanoylalanine, decanoylalanine sodium, decanoylalanine potassium, decanoylalanine triethanolamine, lauroylalanine, lauroylalanine sodium, lauroylalanine potassium, lauroylalanine triethanolamine, myristoylalanine, myristoylalanine sodium, myristoylalanine potassium, myristoylalanine triethanolamine, coconut oil fatty acid acylalanine, coconut oil fatty acid acylalanine sodium, coconut oil fatty acid acylalanine potassium, and coconut oil fatty acid acylalanine triethanolamine. Furthermore, examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include octanoylalanine, octanoylalanine sodium, octanoylalanine potassium, octanoylalanine ammonium, octanoylalanine triethanolamine,Decanoyl alanine, decanoyl alanine sodium, decanoyl alanine potassium, decanoyl alanine ammonium, decanoyl alanine triethanolamine, lauroyl alanine, lauroyl alanine sodium, lauroyl alanine potassium, lauroyl alanine ammonium, lauroyl alanine triethanolamine, myristoyl alanine, myristoyl alanine sodium, myristoyl alanine potassium, myristoyl alanine ammonium salt, myristoyl alanine triethanolamine, coconut oil fatty acid acyl alanine, coconut oil fatty acid acyl alanine sodium, coconut oil fatty acid acyl alanine potassium, coconut oil fatty acid acyl alanine ammonium, coconut oil fatty acid acyl alanine triethanolamine Alternatively, octanoylalanine, octanoylalanine sodium, octanoylalanine potassium, octanoylalanine triethanolamine, decanoylalanine, decanoylalanine sodium, decanoylalanine potassium, decanoylalanine triethanolamine, lauroylalanine, lauroylalanine sodium, lauroylalanine potassium, lauroylalanine triethanolamine, myristoylalanine, myristoylalanine sodium, myristoylalanine potassium, coconut oil fatty acid acylalanine, coconut oil fatty acid acylalanine sodium, coconut oil fatty acid acylalanine potassium, and coconut oil fatty acid acylalanine triethanolamine may also be used.

[0078] Specific examples of N-acyl-N-methyl-β-alanine (N-acylmethylalanine) and salts thereof constituting compound (a''') include octanoylmethylalanine, sodium salt of octanoylmethylalanine, potassium salt of octanoylmethylalanine, triethanolamine salt of octanoylmethylalanine, decanoylmethylalanine, sodium salt of decanoylmethylalanine, potassium salt of decanoylmethylalanine, triethanolamine salt of decanoylmethylalanine, lauroylmethylalanine, sodium salt of lauroylmethylalanine sodium salt, potassium salt of lauroylmethylalanine, triethanolamine salt of lauroylmethylalanine, myristoylmethylalanine, sodium salt of myristoylmethylalanine, potassium salt of myristoylmethylalanine, triethanolamine salt of myristoylmethylalanine, palmitoylmethylalanine, sodium salt of palmitoylmethylalanine, potassium salt of palmitoylmethylalanine, triethanolamine salt of palmitoylmethylalanine, stearoylmethylalanine, sodium salt of stearoylmethylalanine, Potassium salt of stearoylmethylalanine, triethanolamine salt of stearoylmethylalanine, oleoylmethylalanine, sodium salt of oleoylmethylalanine, potassium salt of oleoylmethylalanine, triethanolamine salt of oleoylmethylalanine, linoleoylmethylalanine, sodium salt of linoleoylmethylalanine, potassium salt of linoleoylmethylalanine, triethanolamine salt of linoleoylmethylalanine, coconut oil fatty acid acylmethylalanine, sodium salt of coconut oil fatty acid acylmethylalanine, ya The potassium salt of coconut oil fatty acid acylmethylalanine and the triethanolamine salt of coconut oil fatty acid acylmethylalanine are preferred, and octanoylmethylalanine, the sodium salt of octanoylmethylalanine, the potassium salt of octanoylmethylalanine, the triethanolamine salt of octanoylmethylalanine, decanoylmethylalanine, the sodium salt of decanoylmethylalanine, the potassium salt of decanoylmethylalanine, the triethanolamine salt of decanoylmethylalanine, lauroylmethylalanine, the sodium salt of lauroylmethylalanine,The potassium salt of lauroylmethylalanine, the triethanolamine salt of lauroylmethylalanine, myristoylmethylalanine, the sodium salt of myristoylmethylalanine, the potassium salt of myristoylmethylalanine, the triethanolamine salt of myristoylmethylalanine, palmitoylmethylalanine, the sodium salt of palmitoylmethylalanine, the potassium salt of palmitoylmethylalanine, the triethanolamine salt of palmitoylmethylalanine, stearoylmethylalanine, the sodium salt of stearoylmethylalanine, the potassium salt of stearoylmethylalanine, the triethanolamine salt of stearoylmethylalanine, coconut oil fatty acylmethylalanine, the sodium salt of coconut oil fatty acylmethylalanine, the potassium salt of coconut oil fatty acylmethylalanine, and the triethanolamine salt of coconut oil fatty acylmethylalanine are more preferred, and octanoylmethylalanine, octanoylmethylalanine, Even more preferred are the sodium salt of octanoylmethylalanine, the potassium salt of octanoylmethylalanine, the triethanolamine salt of octanoylmethylalanine, decanoylmethylalanine, the sodium salt of decanoylmethylalanine, the potassium salt of decanoylmethylalanine, the triethanolamine salt of decanoylmethylalanine, lauroylmethylalanine, the sodium salt of lauroylmethylalanine, the potassium salt of lauroylmethylalanine, the triethanolamine salt of lauroylmethylalanine, myristoylmethylalanine, the sodium salt of myristoylmethylalanine, the potassium salt of myristoylmethylalanine, the triethanolamine salt of myristoylmethylalanine, coconut acylmethylalanine, the sodium salt of coconut acylmethylalanine, the potassium salt of coconut acylmethylalanine, and the triethanolamine salt of coconut acylmethylalanine. Examples of N-acylmethylalanine and salts thereof include octanoylmethylalanine, octanoylmethylalanine sodium, octanoylmethylalanine potassium, octanoylmethylalanine triethanolamine, decanoylmethylalanine, decanoylmethylalanine sodium, decanoylmethylalanine potassium, decanoylmethylalanine triethanolamine, lauroylmethylalanine,Sodium lauroyl methyl alanine, potassium lauroyl methyl alanine, triethanolamine lauroyl methyl alanine, myristoyl methyl alanine, sodium myristoyl methyl alanine, potassium myristoyl methyl alanine, triethanolamine myristoyl methyl alanine, palmitoyl methyl alanine, sodium palmitoyl methyl alanine, potassium palmitoyl methyl alanine, triethanolamine palmitoyl methyl alanine, stearoyl methyl alanine, sodium stearoyl methyl alanine, potassium stearoyl methyl alanine, triethanolamine stearoyl methyl alanine, sodium oleoyl methyl alanine, potassium oleoyl methyl alanine, triethanolamine octanoyl methyl alanine, triethanolamine linoleoyl methyl alanine, sodium linoleoyl methyl alanine, potassium linoleoyl methyl alanine, triethanolamine linoleoyl methyl alanine, cocoyl methyl alanine, sodium cocoyl methyl alanine, potassium cocoyl methyl alanine, cocoyl methyl alanine Acylmethylalanine triethanolamine and the like are preferred, and more preferred are octanoylmethylalanine, octanoylmethylalanine sodium, octanoylmethylalanine potassium, octanoylmethylalanine triethanolamine, decanoylmethylalanine, decanoylmethylalanine sodium, decanoylmethylalanine potassium, decanoylmethylalanine triethanolamine, lauroylmethylalanine, lauroylmethylalanine sodium, lauroylmethylalanine potassium, lauroylmethylalanine triethanolamine, myristoylmethylalanine, myristoylmethylalanine sodium, myristoylmethylalanine potassium, myristoylmethylalanine triethanolamine, palmitoylmethylalanine, palmitoylmethylalanine sodium, palmitoylmethylalanine potassium, palmitoylmethylalanine triethanolamine, stearoylmethylalanine, stearoylmethylalanine sodium, stearoylmethylalanine potassium, stearoylmethylalanine triethanolamine, and coconut oil fatty acid acylmethylalanine.

[0033] The preferred acyl methyl alanine is sodium coconut oil fatty acid acyl methyl alanine, potassium coconut oil fatty acid acyl methyl alanine, or triethanolamine coconut oil fatty acid acyl methyl alanine, and particularly preferred are octanoyl methyl alanine, sodium octanoyl methyl alanine, potassium octanoyl methyl alanine, triethanolamine coconut oil fatty acid acyl methyl alanine, sodium octanoyl methyl alanine, potassium octanoyl methyl alanine, triethanolamine coconut oil fatty acid acyl methyl alanine, sodium decanoyl methyl alanine, potassium decanoyl methyl alanine, triethanolamine coconut oil fatty acid acyl methyl alanine, sodium lauroyl methyl alanine, potassium lauroyl methyl alanine, triethanolamine coconut oil fatty acid acyl methyl alanine, sodium myristoyl methyl alanine, potassium myristoyl methyl alanine, triethanolamine coconut oil fatty acid acyl methyl alanine. Furthermore, examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include octanoylmethylalanine, octanoylmethylalanine sodium, octanoylmethylalanine potassium, octanoylmethylalanine ammonium, octanoylmethylalanine triethanolamine, decanoylmethylalanine, decanoylmethylalanine sodium, decanoylmethylalanine potassium, decanoylmethylalanine ammonium, decanoylmethylalanine triethanolamine, lauroylmethylalanine, lauroylmethylalanine sodium, lauroylmethylalanine Potassium lauroyl alanine, ammonium lauroyl methyl alanine, triethanolamine lauroyl methyl alanine, myristoyl methyl alanine, sodium myristoyl methyl alanine, potassium myristoyl methyl alanine, ammonium myristoyl methyl alanine, triethanolamine myristoyl methyl alanine, coconut oil fatty acyl methyl alanine, sodium coconut oil fatty acyl methyl alanine, potassium coconut oil fatty acyl methyl alanine, ammonium coconut oil fatty acyl methyl alanine, and triethanolamine coconut oil fatty acyl methyl alanine may also be used.Octanoyl methylalanine, octanoyl methylalanine sodium, octanoyl methylalanine potassium, octanoyl methylalanine triethanolamine, decanoyl methylalanine, decanoyl methylalanine sodium, decanoyl methylalanine potassium, decanoyl methylalanine triethanolamine, lauroyl methylalanine, lauroyl methylalanine sodium, lauroyl methylalanine potassium, lauroyl methylalanine triethanolamine, myristoyl methylalanine sodium, myristoyl methylalanine potassium, myristoyl methylalanine triethanolamine, coconut oil fatty acid acyl methylalanine, coconut oil fatty acid acyl methylalanine sodium, coconut oil fatty acid acyl methylalanine potassium, coconut oil fatty acid acyl methylalanine triethanolamine may also be used.

[0079] Specific examples of N-acyl sarcosine and salts thereof constituting compound (a''') include octanoyl sarcosine, sodium salt of octanoyl sarcosine, potassium salt of octanoyl sarcosine, triethanolamine salt of octanoyl sarcosine, decanoyl sarcosine, sodium salt of decanoyl sarcosine, potassium salt of decanoyl sarcosine, triethanolamine salt of decanoyl sarcosine, lauroyl sarcosine, sodium salt of lauroyl sarcosine, potassium salt of lauroyl sarcosine, triethanolamine salt of lauroyl sarcosine, Myristoyl sarcosine, sodium salt of myristoyl sarcosine, potassium salt of myristoyl sarcosine, triethanolamine salt of myristoyl sarcosine, palmitoyl sarcosine, sodium salt of palmitoyl sarcosine, potassium salt of palmitoyl sarcosine, triethanolamine salt of palmitoyl sarcosine, stearoyl sarcosine, sodium salt of stearoyl sarcosine, potassium salt of stearoyl sarcosine, triethanolamine salt of stearoyl sarcosine, oleoyl sarcosine, sodium salt of oleoyl sarcosine, oleoyl sarcosine Preferred are potassium salt of oleoyl sarcosine, triethanolamine salt of oleoyl sarcosine, linoleoyl sarcosine, sodium salt of linoleoyl sarcosine, potassium salt of linoleoyl sarcosine, triethanolamine salt of linoleoyl sarcosine, coconut oil fatty acid acyl sarcosine, sodium salt of coconut oil fatty acid acyl sarcosine, potassium salt of coconut oil fatty acid acyl sarcosine and triethanolamine salt of coconut oil fatty acid acyl sarcosine, and octanoyl sarcosine, sodium salt of octanoyl sarcosine and potassium octanoyl sarcosine. Salt, triethanolamine salt of octanoyl sarcosine, decanoyl sarcosine, sodium salt of decanoyl sarcosine, potassium salt of decanoyl sarcosine, triethanolamine salt of decanoyl sarcosine, lauroyl sarcosine, sodium salt of lauroyl sarcosine, potassium salt of lauroyl sarcosine, triethanolamine salt of lauroyl sarcosine, myristoyl sarcosine, sodium salt of myristoyl sarcosine, potassium salt of myristoyl sarcosine, triethanolamine salt of myristoyl sarcosine, palmitoyl sarcosine,Palmitoyl sarcosine sodium salt, palmitoyl sarcosine potassium salt, palmitoyl sarcosine triethanolamine salt, stearoyl sarcosine, stearoyl sarcosine sodium salt, stearoyl sarcosine potassium salt, stearoyl sarcosine triethanolamine salt, coconut oil fatty acid acyl sarcosine, coconut oil fatty acid acyl sarcosine sodium salt, coconut oil fatty acid acyl sarcosine potassium salt, coconut oil fatty acid acyl sarcosine triethanolamine salt are more preferred, and octanoyl sarcosine, octanoyl sarcosine sodium salt, octanoyl sarcosine potassium salt, octanoyl sarcosine triethanolamine salt are more preferred. Even more preferred are decanoyl sarcosine, decanoyl sarcosine sodium salt, decanoyl sarcosine potassium salt, decanoyl sarcosine triethanolamine salt, lauroyl sarcosine, lauroyl sarcosine sodium salt, lauroyl sarcosine potassium salt, myristoyl sarcosine, myristoyl sarcosine sodium salt, myristoyl sarcosine potassium salt, myristoyl sarcosine triethanolamine salt, coconut acyl sarcosine, coconut acyl sarcosine sodium salt, coconut acyl sarcosine potassium salt, and coconut acyl sarcosine triethanolamine salt. Examples of N-acyl sarcosine and salts thereof include octanoyl sarcosine, sodium octanoyl sarcosine, potassium octanoyl sarcosine, triethanolamine octanoyl sarcosine, decanoyl sarcosine, sodium decanoyl sarcosine, potassium decanoyl sarcosine, triethanolamine decanoyl sarcosine, lauroyl sarcosine, sodium lauroyl sarcosine, potassium lauroyl sarcosine, triethanolamine lauroyl sarcosine, myristoyl sarcosine, sodium myristoyl sarcosine, potassium myristoyl sarcosine, triethanolamine myristoyl sarcosine, palmitoyl sarcosine, sodium palmitoyl sarcosine, potassium palmitoyl sarcosine, triethanolamine palmitoyl sarcosine, stearoyl sarcosine, sodium stearoyl sarcosine, potassium stearoyl sarcosine, triethanolamine stearoyl sarcosine,Sodium oleoyl sarcosine, oleoyl sarcosine, potassium oleoyl sarcosine, triethanolamine oleoyl sarcosine, triethanolamine stearoyl sarcosine, linoleoyl sarcosine, sodium linoleoyl sarcosine, potassium linoleoyl sarcosine, triethanolamine linoleoyl sarcosine, coconut oil fatty acid acyl sarcosine, sodium coconut oil fatty acid acyl sarcosine, potassium coconut oil fatty acid acyl sarcosine, triethanolamine coconut oil fatty acid acyl sarcosine, and the like are preferred, and octanoic acid is more preferred. Octanoyl sarcosine, Sodium octanoyl sarcosine, Potassium octanoyl sarcosine, Triethanolamine octanoyl sarcosine, Decanoyl sarcosine, Sodium decanoyl sarcosine, Potassium decanoyl sarcosine, Triethanolamine decanoyl sarcosine, Lauroyl sarcosine, Sodium lauroyl sarcosine, Potassium lauroyl sarcosine, Triethanolamine lauroyl sarcosine, Myristoyl sarcosine, Sodium myristoyl sarcosine, Potassium myristoyl sarcosine, Myristoyl sarcosine triethanolamine, palmitoyl sarcosine, palmitoyl sarcosine sodium, palmitoyl sarcosine potassium, palmitoyl sarcosine triethanolamine, stearoyl sarcosine, stearoyl sarcosine sodium, stearoyl sarcosine potassium, stearoyl sarcosine triethanolamine, and coconut oil fatty acid acyl sarcosine, coconut oil fatty acid acyl sarcosine sodium, coconut oil fatty acid acyl sarcosine potassium, coconut oil fatty acid acyl sarcosine triethanolamine, and particularly preferred are octanoyl sarcosine, Sodium octanoyl sarcosine, potassium octanoyl sarcosine, triethanolamine octanoyl sarcosine, decanoyl sarcosine, sodium decanoyl sarcosine, potassium decanoyl sarcosine, triethanolamine decanoyl sarcosine, lauroyl sarcosine, sodium lauroyl sarcosine, potassium lauroyl sarcosine, triethanolamine lauroyl sarcosine, myristoyl sarcosine, sodium myristoyl sarcosine, potassium myristoyl sarcosine, triethanolamine myristoyl sarcosine,Cocoyl sarcosine, sodium cocoyl sarcosine, potassium cocoyl sarcosine, and triethanolamine cocoyl sarcosine. Furthermore, examples of N-acylamino acids and salts thereof having an acyl group with a carbon chain length of C8 to C22 include octanoyl sarcosine, sodium octanoyl sarcosine, potassium octanoyl sarcosine, ammonium octanoyl sarcosine, triethanolamine octanoyl sarcosine, decanoyl sarcosine, sodium decanoyl sarcosine, potassium decanoyl sarcosine, ammonium decanoyl sarcosine, triethanolamine decanoyl sarcosine, lauroyl sarcosine, sodium lauroyl sarcosine, potassium lauroyl sarcosine, ammonium lauroyl sarcosine, triethanolamine lauroyl sarcosine, myristoyl sarcosine, sodium myristoyl sarcosine, potassium myristoyl sarcosine, ammonium myristoyl sarcosine, triethanolamine myristoyl sarcosine, coconut oil fatty acid acyl sarcosine, sodium coconut oil fatty acid acyl sarcosine , coconut oil fatty acid acyl sarcosine potassium, coconut oil fatty acid acyl sarcosine ammonium, coconut oil fatty acid acyl sarcosine triethanolamine may be used, and octanoyl sarcosine, octanoyl sarcosine sodium, octanoyl sarcosine potassium, octanoyl sarcosine triethanolamine, decanoyl sarcosine, decanoyl sarcosine sodium, decanoyl sarcosine potassium, decanoyl sarcosine triethanolamine, lauroyl sarcosine, lauroyl sarcosine sodium, lauroyl sarcosine potassium, lauroyl sarcosine triethanolamine, myristoyl sarcosine sodium, myristoyl sarcosine potassium, myristoyl sarcosine triethanolamine, coconut oil fatty acid acyl sarcosine, coconut oil fatty acid acyl sarcosine sodium, coconut oil fatty acid acyl sarcosine potassium, coconut oil fatty acid acyl sarcosine triethanolamine may also be used.

[0080] Specific examples of N-acylprolines and salts thereof constituting compound (a''') include octanoylproline, sodium salt of octanoylproline, potassium salt of octanoylproline, decanoylproline, sodium salt of decanoylproline, potassium salt of decanoylproline, lauroylproline, sodium salt of lauroylproline, potassium salt of lauroylproline, myristoylproline, sodium salt of myristoylproline, potassium salt of myristoylproline, palmitoylproline, sodium salt of palmitoylproline, palmitoylproline, Preferred are potassium salt of lumitoylproline, stearoylproline, sodium salt of stearoylproline, potassium salt of stearoylproline, oleoylproline, sodium salt of oleoylproline, potassium salt of oleoylproline, linoleoylproline, sodium salt of linoleoylproline, potassium salt of linoleoylproline, coconut oil fatty acid acylproline, sodium salt of coconut oil fatty acid acylproline, and potassium salt of coconut oil fatty acid acylproline, and octanoylproline, sodium salt of octanoylproline, and octanoylproline, sodium salt of octanoylproline, and octanoylproline, sodium salt of octanoylproline, and potassium salt of octanoylproline. Potassium salt of decanoylproline, decanoylproline, sodium salt of decanoylproline, potassium salt of decanoylproline, lauroylproline, sodium salt of lauroylproline, potassium salt of lauroylproline, myristoylproline, sodium salt of myristoylproline, potassium salt of myristoylproline, palmitoylproline, sodium salt of palmitoylproline, potassium salt of palmitoylproline, stearoylproline, sodium salt of stearoylproline, potassium salt of stearoylproline, coconut oil fatty acid esters More preferred are octanoylproline, the sodium salt of octanoylproline, the potassium salt of octanoylproline, decanoylproline, the sodium salt of decanoylproline, the potassium salt of decanoylproline, lauroylproline, the sodium salt of lauroylproline, the potassium salt of lauroylproline, myristoylproline, the sodium salt of myristoylproline, the potassium salt of myristoylproline, coconut oil fatty acylproline,Even more preferred are sodium salts of coconut oil fatty acid acylproline and potassium salts of coconut oil fatty acid acylproline. Preferred N-acylprolines and salts thereof include octanoylproline, octanoylproline sodium, octanoylproline potassium, decanoylproline, decanoylproline sodium, decanoylproline potassium, lauroylproline, lauroylproline sodium, lauroylproline potassium, myristoylproline, myristoylproline sodium, myristoylproline potassium, palmitoylproline, palmitoylproline sodium, palmitoylproline potassium, stearoylproline, stearoylproline sodium, stearoylproline potassium, oleoylproline sodium, oleoylproline, oleoylproline potassium, linoleoylproline, linoleoylproline sodium, linoleoylproline potassium, coconut oil fatty acid acylproline, coconut oil fatty acid acylproline sodium, coconut oil fatty acid acylproline potassium, and the like. More preferred are octanoylproline, octanoylproline sodium, octanoylproline potassium, decanoylproline, and decanoyl Sodium proline, decanoylproline potassium, lauroylproline, lauroylproline sodium, lauroylproline potassium, myristoylproline, myristoylproline sodium, myristoylproline potassium, palmitoylproline, palmitoylproline sodium, palmitoylproline potassium, stearoylproline, stearoylproline sodium, stearoylproline potassium, and coconut oil fatty acylproline, coconut oil fatty acylproline sodium, coconut oil fatty acylproline potassium, and particularly preferred are octanoylproline, octanoylproline sodium, octanoylproline potassium, decanoylproline, decanoylproline sodium, decanoylproline potassium, lauroylproline, lauroylproline sodium, lauroylproline potassium, myristoylproline, myristoylproline sodium, myristoylproline potassium, coconut oil fatty acylproline, coconut oil fatty acylproline sodium, and coconut oil fatty acylproline potassium.Examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include octanoylproline, octanoylproline sodium, octanoylproline potassium, octanoylproline ammonium salt, octanoylproline triethanolamine, decanoylproline, decanoylproline sodium, decanoylproline potassium, decanoylproline ammonium salt, decanoylproline triethanolamine, lauroylproline, lauroylproline sodium, lauroylproline potassium, lauroylproline ammonium salt, lauroylproline triethanolamine, myristoylproline, myristoylproline sodium, myristoylproline potassium, myristoylproline ammonium salt, Myristoylproline triethanolamine, coconut oil fatty acylproline, coconut oil fatty acylproline sodium, coconut oil fatty acylproline potassium, coconut oil fatty acylproline ammonium salt, coconut oil fatty acylproline triethanolamine may be used, and octanoylproline, octanoylproline sodium, octanoylproline potassium, decanoylproline, decanoylproline sodium, decanoylproline potassium, lauroylproline, lauroylproline sodium, lauroylproline potassium, myristoylproline sodium, myristoylproline potassium, coconut oil fatty acylproline, coconut oil fatty acylproline sodium, coconut oil fatty acylproline potassium may also be used.

[0081] Specific examples of N-acyl-N-methyltaurine (N-acylmethyltaurine) and salts thereof constituting compound (a''') include octanoylmethyltaurine, sodium salt of octanoylmethyltaurine, potassium salt of octanoylmethyltaurine, decanoylmethyltaurine, sodium salt of decanoylmethyltaurine, potassium salt of decanoylmethyltaurine, lauroylmethyltaurine, sodium salt of lauroylmethyltaurine, potassium salt of lauroylmethyltaurine, myristoylmethyltaurine, sodium salt of myristoylmethyltaurine Salt, Potassium Salt of Myristoyl Methyl Taurine, Palmitoyl Methyl Taurine, Sodium Salt of Palmitoyl Methyl Taurine, Potassium Salt of Palmitoyl Methyl Taurine, Stearoyl Methyl Taurine, Sodium Salt of Stearoyl Methyl Taurine, Potassium Salt of Stearoyl Methyl Taurine, Oleoyl Methyl Taurine, Sodium Salt of Oleoyl Methyl Taurine, Potassium Salt of Oleoyl Methyl Taurine, Linoleoyl Methyl Taurine, Sodium Salt of Linoleoyl Methyl Taurine, Potassium Salt of Linoleoyl Methyl Taurine, Coconut Oil Fatty Acids Acyl methyl taurine, sodium salt of coconut oil fatty acid acyl methyl taurine, potassium salt of coconut oil fatty acid acyl methyl taurine are preferred, and octanoyl methyl taurine, sodium salt of octanoyl methyl taurine, potassium salt of octanoyl methyl taurine, decanoyl methyl taurine, sodium salt of decanoyl methyl taurine, potassium salt of decanoyl methyl taurine, lauroyl methyl taurine, sodium salt of lauroyl methyl taurine, potassium salt of lauroyl methyl taurine, myristoyl methyl taurine, myristoyl methyl taurine are also preferred. Sodium salt of urine, potassium salt of myristoyl methyl taurine, palmitoyl methyl taurine, sodium salt of palmitoyl methyl taurine, potassium salt of palmitoyl methyl taurine, stearoyl methyl taurine, sodium salt of stearoyl methyl taurine, potassium salt of stearoyl methyl taurine, cocoyl acyl methyl taurine, sodium salt of cocoyl acyl methyl taurine, potassium salt of cocoyl acyl methyl taurine are more preferred, octanoyl methyl taurine, sodium salt of octanoyl methyl taurine,Even more preferred are potassium salt of octanoyl methyl taurine, decanoyl methyl taurine, sodium salt of decanoyl methyl taurine, potassium salt of decanoyl methyl taurine, lauroyl methyl taurine, sodium salt of lauroyl methyl taurine, potassium salt of lauroyl methyl taurine, myristoyl methyl taurine, sodium salt of myristoyl methyl taurine, potassium salt of myristoyl methyl taurine, cocoyl acyl methyl taurine, sodium salt of cocoyl acyl methyl taurine, and potassium salt of cocoyl acyl methyl taurine. Examples of N-acyl methyl taurine and salts thereof include octanoyl methyl taurine, sodium octanoyl methyl taurine, potassium octanoyl methyl taurine, decanoyl methyl taurine, sodium decanoyl methyl taurine, potassium decanoyl methyl taurine, lauroyl methyl taurine, sodium lauroyl methyl taurine, potassium lauroyl methyl taurine, myristoyl methyl taurine, sodium myristoyl methyl taurine, potassium myristoyl methyl taurine, palmitoyl methyl taurine, sodium palmitoyl methyl taurine, potassium palmitoyl methyl taurine, stearoyl methyl taurine, sodium stearoyl methyl taurine, potassium stearoyl methyl taurine, sodium oleoyl methyl taurine, oleoyl methyl taurine, potassium oleoyl methyl taurine, and linoleic acid methyl taurine. Lauroyl methyl taurine, sodium linoleoyl methyl taurine, potassium linoleoyl methyl taurine, coconut oil fatty acid acyl methyl taurine, sodium coconut oil fatty acid acyl methyl taurine, potassium coconut oil fatty acid acyl methyl taurine, and the like are preferred, and more preferred are octanoyl methyl taurine, sodium octanoyl methyl taurine, potassium octanoyl methyl taurine, decanoyl methyl taurine, sodium decanoyl methyl taurine, potassium decanoyl methyl taurine, lauroyl methyl taurine, sodium lauroyl methyl taurine, potassium lauroyl methyl taurine, myristoyl methyl taurine, sodium myristoyl methyl taurine, potassium myristoyl methyl taurine, palmitoyl methyl taurine, sodium palmitoyl methyl taurine, and potassium palmitoyl methyl taurine.Stearoyl methyl taurine, sodium stearoyl methyl taurine, potassium stearoyl methyl taurine, and coconut oil fatty acyl methyl taurine, sodium coconut oil fatty acyl methyl taurine, potassium coconut oil fatty acyl methyl taurine, particularly preferred are octanoyl methyl taurine, sodium octanoyl methyl taurine, potassium octanoyl methyl taurine, decanoyl methyl taurine, sodium decanoyl methyl taurine, potassium decanoyl methyl taurine, lauroyl methyl taurine, sodium lauroyl methyl taurine, potassium lauroyl methyl taurine, myristoyl methyl taurine, sodium myristoyl methyl taurine, potassium myristoyl methyl taurine, coconut oil fatty acyl methyl taurine, sodium coconut oil fatty acyl methyl taurine, and potassium coconut oil fatty acyl methyl taurine. Furthermore, examples of N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof include octanoylmethyl taurine, sodium octanoylmethyl taurine, potassium octanoylmethyl taurine, ammonium salt of octanoylmethyl taurine, triethanolamine octanoylmethyl taurine, decanoylmethyl taurine, sodium decanoylmethyl taurine, potassium decanoylmethyl taurine, ammonium salt of decanoylmethyl taurine, triethanolamine decanoylmethyl taurine, lauroylmethyl taurine, sodium lauroylmethyl taurine, potassium lauroylmethyl taurine, ammonium salt of lauroylmethyl taurine, and lauroylmethyl taurine. Also usable are uroyl methyl taurine triethanolamine, myristoyl methyl taurine, sodium myristoyl methyl taurine, potassium myristoyl methyl taurine, ammonium myristoyl methyl taurine, triethanolamine myristoyl methyl taurine, coconut oil fatty acyl methyl taurine, sodium coconut oil fatty acyl methyl taurine, potassium coconut oil fatty acyl methyl taurine, ammonium coconut oil fatty acyl methyl taurine, triethanolamine coconut oil fatty acyl methyl taurine, octanoyl methyl taurine sodium, potassium octanoyl methyl taurine, decanoyl methyl taurine,Sodium decanoyl methyl taurine, potassium decanoyl methyl taurine, lauroyl methyl taurine, sodium lauroyl methyl taurine, potassium lauroyl methyl taurine, sodium myristoyl methyl taurine, potassium myristoyl methyl taurine, coconut oil fatty acid acyl methyl taurine, sodium coconut oil fatty acid acyl methyl taurine, and potassium coconut oil fatty acid acyl methyl taurine may also be used.

[0082] Specific examples of the alkyl betaine of compound (a''') include cocobetaine, lauryl betaine, myristyl betaine, cetyl betaine, stearyl betaine, oleyl betaine, decyl betaine, and behenyl betaine. Cocobetaine, lauryl betaine, and myristyl betaine are preferred, and cocobetaine is more preferred. Use of these alkyl betaines can improve multiple properties selected from hydrophilicity, a favorable feel, and the like of the treated powder.

[0083] In this embodiment, compound (a''') preferably comprises N-acylalanine and / or N-acyl-N-methyl-β-alanine. Compound (a''') is preferably N-acylalanine and / or N-acyl-N-methyl-β-alanine having an acyl group with a carbon chain length of C8 to C22. Furthermore, examples of salts of compound (a''') include pharmacologically acceptable salts, such as alkali metal salts such as lithium salt, sodium salt, and potassium salt; alkaline earth metal salts such as calcium salt and magnesium salt; ammonium salt; basic organic salts, and triethanolamine salt. Of these, from the viewpoint of solubility, sodium salt, potassium salt, ammonium salt, and triethanolamine salt are preferred, sodium salt, potassium salt, and triethanolamine salt are more preferred, and sodium salt is even more preferred. Furthermore, in the case of polybasic acids such as dibasic acids, both monosalts (monosodium glutamate, etc.) and di-salts (disodium glutamate, etc.) can be used. Furthermore, when the N-acyl amino acid of compound (a''') includes N-acylalanine and N-acyl-N-methyl-β-alanine, the total content of these amino acids in the surface treatment agent of this embodiment is preferably 5 to 40 mass%, and more preferably 10 to 30 mass%.

[0084] Use of compound (a''') can improve multiple properties selected from hydrophilicity, a pleasant feel, and the like of the treated powder. The concentration of compound (a''') in treatment liquid A'' is preferably 5.0 mass% or more, more preferably 7.5 mass% or more, and even more preferably 10.0 mass% or more. The concentration of compound (a''') in treatment liquid A'' is preferably 40 mass% or less, more preferably 35 mass% or less, and even more preferably 30 mass% or less. The concentration of compound (a''') in treatment liquid A'' may be preferably 5.0 to 40 mass%, more preferably 7.5 to 35 mass%, and even more preferably 10.0 to 30.0 mass%. By adjusting the concentration of compound (a''') in treatment liquid A'' to such a concentration, multiple properties selected from hydrophilicity, a pleasant feel, and the like of the treated powder when treatment liquid A'' is used can be improved.

[0085] Treatment liquid B" is an aqueous solution containing (f') one or more components selected from metal ions and acids, and the metal ions of component (f') include alkaline earth metal ions or zinc ions, preferably alkaline earth metal ions or zinc ions. Examples of the metal ions include magnesium ions, calcium ions, and zinc ions. Examples of compounds that generate such ions include magnesium hydroxide, magnesium chloride, magnesium sulfate, magnesium nitrate, magnesium acetate, calcium hydroxide, calcium chloride, calcium sulfate, calcium nitrate, calcium acetate, zinc chloride, zinc nitrate, zinc sulfate, zinc acetate, and zinc hydroxide. Component (f') preferably contains, as the metal ions, ions of one or more metals selected from the group consisting of calcium, zinc, and magnesium, and more preferably contains, as the metal ions, ions of one or more metals selected from calcium and magnesium. Examples of the acid of component (f') include an aqueous citric acid solution, an aqueous tartaric acid solution, a lactic acid solution, a malic acid solution, an aqueous succinic acid solution, an aqueous ascorbic acid solution, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, and boric acid, and are preferably an aqueous citric acid solution or an aqueous sulfuric acid solution, and more preferably an aqueous citric acid solution. Component (f') preferably contains one or more selected from the group consisting of calcium ions, magnesium ions, and citric acid. The solids concentration in treatment liquid B'' is preferably 5 to 75% by mass, more preferably 8 to 70% by mass, and even more preferably 10 to 65% by mass. By setting the solids concentration in treatment liquid B'' within this range, the treated powder can be treated with the surface treatment agent at a high density, and multiple properties selected from hydrophilicity, favorable feel, and the like of the treated powder can be improved. In one embodiment of the present invention, treatment solution B" does not contain, at a concentration equal to or greater than a predetermined level, a component that inhibits the formation of a salt between metal ion (f') contained in treatment solution B" and compound (a''') contained in the treatment solution, an N-acylamino acid having an acyl group with a carbon chain length of C8 to C22. Examples of the component that inhibits the formation of a salt include metal ions other than alkaline earth metal ions or zinc ions, and components that form chelates with alkaline earth metal ions or zinc ions.The predetermined concentration is, for example, a molar ratio relative to the metal ion (f') contained in treatment solution B" of 0.001 or more, 0.01 or more, 0.05 or more, etc. Furthermore, the predetermined concentration is, for example, a molar ratio relative to the compound (a''') contained in treatment solution A" of 0.01 or more, 0.05 or more, 0.1 or more, etc. When a component that inhibits the formation of the salt is contained at such a concentration, the formation of the salt may be inhibited. The mass ratio of component (f') of treatment solution B" to the total mass of compound (a'"), compound (b"), and compound (g) in treatment solution A" is preferably 0.01 to 1.00, more preferably 0.10 to 0.80, and even more preferably 0.15 to 0.65.

[0086] Treatment liquid A" may further contain (g) one or more compounds selected from amphoteric surfactants, nonionic surfactants, or salts thereof. Examples of the amphoteric surfactant compound (g) include amino acid amphoteric surfactants such as sodium cocoamphoacetate, sodium lauroamphoacetate, disodium cocoamphodiacetate, sodium cocoamphopropionate, and sodium palmamphoacetate; sulfobetaine types such as lauramidopropyl hydroxysultaine, lauryl hydroxysultaine, and cocamidopropyl hydroxysultaine; phosphobetaine types such as lauryl hydroxyphosphobetaine; alkylamidobetaine types such as cocamidopropyl betaine, lauramidopropyl betaine, myristamidopropyl betaine, pearl nucleus fatty acid amidopropyl betaine, (capryl / capramido)propyl betaine, and undecylenamidopropyl betaine; hydroxyalkyl ( C12-14) Carbobetaine type surfactants such as hydroxyethyl sarcosine; betaine type amphoteric surfactants; amine oxide type amphoteric surfactants such as lauramine oxide, lauramidopropylamine oxide, cocoamine oxide, myristamidopropylamine oxide, and cocamidopropylamine oxide; lecithins such as hydrogenated lecithin, lecithin, and lysolecithin; saponins such as quillaja saponin, soybean saponin, yucca saponin, sophora saponin, beet saponin, adzuki bean saponin, carrot saponin, tea seed saponin, loofah saponin, and Centella asiatica saponin; and natural amphoteric surfactants such as lanolin, sodium surfactin, phospholipids, cholesterol, and bile acids.

[0087] The amphoteric surfactant of the compound (g) is preferably one or more of the following: an amino acid amphoteric surfactant, a betaine amphoteric surfactant, an amine oxide amphoteric surfactant, or a natural amphoteric surfactant; more preferably one or two or more of the following: a betaine amphoteric surfactant or a natural amphoteric surfactant; even more preferably one or two or more of the following: a lecithin; and particularly preferably hydrogenated lecithin.

[0088] Examples of the nonionic surfactant of the compound (g) include steareth-2, steareth-3, steareth-8, steareth-10, steareth-11, steareth-15, steareth-20, steareth-21, ceteareth-12, ceteareth-20, ceteareth-25, ceteth-3, ceteth-6, ceteth-10, ceteth-15, ceteth-20, ceteth-25, ceteth-30, trideceth-6, trideceth-9, trideceth-10, trideceth-12, beheneth-5, beheneth-10, beheneth-20, beheneth-30, laureth-2, laureth- 3, Laureth-4, Laureth-7, Laureth-9, Laureth-21, Laureth-23, Laureth-25, Laureth-30, Isosteareth-20, Isoceteth-10, Isoceteth-20, Isoceteth-25, Octyldodeceth-16, Octyldodeceth-20, Oleth-2, Oleth-10, Octyldodeceth-25, (C12-14) s-Palaceth-5, (C12-14) s-Palaceth-7, (C12-14) s-Palaceth-9, (C12-14) Pareth-3, (C12-14) Pareth-5, (C12-14) Pareth-7, (C12-14) Pareth- polyoxyethylene alkyl ethers such as PEG-12, polyoxyethylene steryl ethers such as PEG-5 phytosterol, PEG-10 phytosterol, PEG-20 phytosterol, PEG-30 phytosterol, cholesterol-10, cholesterol-24, polyoxyethylene alkyl ethers such as PEG-12, PEG-5 phytosterol, PEG-10 phytosterol, PEG-20 phytosterol, PEG-30 phytosterol, cholesterol-10, cholesterol-24, polyoxyethylene alkyl ethers such as PEG-12, PEG-5 phytosterol, PEG-10 phytosterol, PEG-20 phytosterol, PEG-30 phytosterol, cholesterol-10, cholesterol-24, polyoxyethylene alkyl ethers such as PEG-12, PEG-10 phytosterol ... PEG-10 phytosterol, polyoxyethylene alkyl ethers such as PEG-12, PEG-10 phytosterol, PEG-10 phytosterol, polyoxyethylene alkyl ethers such as PEG-12, PEG-10 phytosterol, PEG-10 phytosterol, polyoxyethylene alkyl ethers such as PEG-10 phytosterol, PEG-10 polyoxypropylene alkyl ethers, PEG-6 isostearate, PEG-8 isostearate, PEG-10 isostearate, PEG-12 isostearate, PEG-2 laurate, PEG-4 laurate, PEG-12 laurate, PEG-2 stearate, PEG-10 stearate, PEG-20 stearate, PEG-25 stearate, PEG-40 stearate, PEG-45 stearate, PEG-55 stearate, PEG-75 stearate, PEG-100 stearate, PEG-150 stearate,Polyoxyethylene fatty acid esters such as PEG-150 distearate, PEG-3 glyceryl isostearate, PEG-5 glyceryl isostearate, PEG-6 glyceryl isostearate, PEG-8 glyceryl isostearate, PEG-15 glyceryl isostearate, PEG-20 glyceryl isostearate, PEG-25 glyceryl isostearate, PEG-30 glyceryl isostearate, PEG-60 glyceryl isostearate, PEG-5 glyceryl triisostearate, PEG-1 triisostearate 0 glyceryl, PEG-20 glyceryl triisostearate, polyglyceryl-3 diisostearate, polyglyceryl-10 diisostearate, PEG-7 glyceryl coconut oil fatty acid, PEG-5 glyceryl stearate, PEG-15 glyceryl stearate, polyoxyethylene polyhydric alcohol fatty acid esters such as sorbeth-30 tetraoleate, sorbeth-40 tetraoleate, and sorbeth-60 tetraoleate, PEG-10 hydrogenated castor oil, PEG-20 hydrogenated castor oil, PEG-30 hydrogenated castor oil, PEG-40 hydrogenated castor oil, P Polyoxyethylene hydrogenated castor oils such as EG-60 hydrogenated castor oil, PEG-80 hydrogenated castor oil, and PEG-100 hydrogenated castor oil; polyoxyethylene sorbitan fatty acid esters such as polysorbate 20, polysorbate 40, polysorbate 60, polysorbate 65, polysorbate 80, and polysorbate 85; polyoxyethylene alkylphenyl ethers, polyoxyethylene polystyrylphenyl ethers, polyoxyethylene polyoxypropylene glycols, polyoxyethylene polyoxypropylene alkyl ethers, poly Polyoxyethylene condensed types such as oxyalkylene fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene fatty acid alkanolamides, polyoxyalkylene alkylglucosides, polyoxyalkylene hydrogenated castor oils, polyoxyalkylene alkylamines, and polyoxyalkylene alkylphenyl ethers; glycol fatty acid esters such as PG stearate, glycerin fatty acid esters such as glyceryl isostearate, glyceryl oleate, glyceryl behenate, and glyceryl stearate;Sorbitan fatty acid esters such as sorbitan coconut fatty acid, sorbitan laurate, sorbitan oleate, sorbitan stearate, sorbitan isostearate, sorbitan olivate, sorbitan sesquiisostearate, sorbitan sesquioleate, sorbitan sesquistearate, sorbitan trioleate, sorbitan tristearate, and sorbitan palmitate, sucrose distearate, sucrose stearate, sucrose palmitate, and sucrose laurate Sucrose, sucrose fatty acid esters such as sucrose polystearate, polyglyceryl-2 laurate, polyglyceryl-4 laurate, polyglyceryl-5 laurate, polyglyceryl-6 laurate, polyglyceryl-10 laurate, polyglyceryl-5 myristate, polyglyceryl-6 myristate, polyglyceryl-10 myristate, polyglyceryl-10 pentaisostearate, polyglyceryl-10 pentaoleate, polyglyceryl-10 pentastearate, stearyl alcohol, glyceryl laurate ... Polyglyceryl-2 stearate, Polyglyceryl-4 stearate, Polyglyceryl-5 stearate, Polyglyceryl-6 stearate, Polyglyceryl-10 stearate, Polyglyceryl-2 isostearate, Polyglyceryl-4 isostearate, Polyglyceryl-10 isostearate, Polyglyceryl-2 oleate, Polyglyceryl-4 oleate, Polyglyceryl-5 oleate, Polyglyceryl-10 oleate, Polyglyceryl-3 polyricinoleate, Polyricinoleate Examples of polyhydric alcohol ester types include polyglycerin fatty acid esters such as polyglyceryl-6 leate; fatty acid alkanolamides such as cocamide DEA, cocamide MEA, and lauramide DEA; and polyhydric alcohol condensation types include alkyl glycosides such as (C12-20) alkyl glucoside, arachidyl glucoside, arachyl glucoside, (caprylyl / capryl) glucoside, cetearyl glucoside, decyl glucoside, coconut oil alkyl glucoside, and lauryl glucoside.

[0089] The nonionic surfactant of the compound (g) is preferably one or more types corresponding to a polyoxyethylene condensation type, a polyhydric alcohol condensation type, or a polyhydric alcohol ester type, more preferably one or two or more types corresponding to a polyoxyethylene condensation type or a polyhydric alcohol condensation type, even more preferably one or two or more types corresponding to a polyoxyethylene alkyl ether or a polyglyceryl fatty acid ester, and particularly preferably one or two or more types corresponding to Beheneth-20, PEG-20 hydrogenated castor oil, or Polyglyceryl laurate-10.

[0090] Use of compound (g) can improve several properties selected from hydrophilicity, a pleasant feel, and the like of the treated powder. The concentration of compound (g) in treatment liquid A" is 0% by mass or more, more preferably 0.01% by mass or more, even more preferably 0.10% by mass or more, particularly preferably 0.25% by mass or more, and most preferably 0.50% by mass or more. The concentration of compound (g) in treatment liquid A" is preferably 40% by mass or less, more preferably 10% by mass or less, even more preferably 5.0% by mass or less, and particularly preferably 2.0% by mass or less. The concentration of compound (g) in treatment liquid A" may be preferably 0.01 to 40% by mass, more preferably 0.1 to 10% by mass, even more preferably 0.25 to 5.0% by mass, and particularly preferably 0.50 to 2.0% by mass. By adjusting the concentration of compound (g) in treatment liquid A″ to such a concentration, it is possible to improve several properties selected from hydrophilicity, pleasant feel, and the like of the treated powder when treatment liquid A″ is used.

[0091] In this embodiment, the treatment solution A'' may contain compound (b'') one or more compounds selected from fatty acids and salts thereof, and when fatty acids and salts thereof are contained, they are preferably fatty acids having a carbon chain length of C8 to C22 and salts thereof.

[0092] The fatty acid that is compound (b'') may be a straight-chain fatty acid or a branched-chain fatty acid, with straight-chain fatty acids being preferred. It may be a saturated fatty acid or an unsaturated fatty acid, with saturated fatty acids being preferred. The fatty acid may be a fatty acid having a carbon chain length of C8 to C22, with fatty acids having a carbon chain length of C8 to C20 being preferred, fatty acids having a carbon chain length of C8 to C18 being more preferred, and fatty acids having a carbon chain length of C8 to C14 being even more preferred. Examples of fatty acids having a carbon chain length of C8 to C22 include octanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, arachidic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, eicosenoic acid, erucic acid, hardened beef tallow fatty acid, coconut oil fatty acid, and palm oil fatty acid. Fatty acids having a carbon chain length of C8 to C22 are preferably octanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, arachidic acid, oleic acid, and coconut oil fatty acid, more preferably octanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, and coconut oil fatty acid, and even more preferably octanoic acid, decanoic acid, lauric acid, myristic acid, and coconut oil fatty acid. Salts of fatty acids having a carbon chain length of C8 to C22 include pharmacologically acceptable salts, such as alkali metal salts (e.g., lithium salts, sodium salts, and potassium salts); alkaline earth metal salts (e.g., calcium salts and magnesium salts); ammonium salts; basic organic salts; and triethanolamine salts. Among these, sodium salts, potassium salts, ammonium salts, and triethanolamine salts are preferred from the viewpoint of solubility, with sodium salts and potassium salts being more preferred, and sodium salts being even more preferred.

[0093] The concentration of compound (b") in treatment solution A" is 0.0% by mass or more, preferably 0.5% by mass or more, and more preferably 1.0% by mass or more. The concentration of compound (b") in treatment solution A" is preferably 20% by mass or less, more preferably 10% by mass or less, and even more preferably 5% by mass or less. The concentration of compound (b") in treatment solution A" may be preferably 0.5 to 20% by mass, more preferably 0.5 to 10% by mass, and even more preferably 1.0 to 5% by mass. Compound (b") in treatment solution A' may be added to treatment solution A" as a raw material separately from the other components in treatment solution A" or may be added to treatment solution A" as a raw material contained in a raw material corresponding to the other components in treatment solution A" (e.g., compound (a'")).

[0094] Treatment solution A" preferably has a pH of 7.0 or higher, more preferably 8.0 or higher, and even more preferably 8.5 or higher. Treatment solution A" preferably has a pH of 13.0 or lower, more preferably 11.5 or lower. To adjust the pH, aqueous citric acid, aqueous tartaric acid, lactic acid, malic acid, succinic acid, ascorbic acid, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, potassium hydroxide, arginine, lysine, or the like can be used. A pH adjuster that does not inhibit the salt formation between compound (a''') of treatment solution A" and the metal ion of component (f') of treatment solution B" is preferred, and a pH adjuster that does not chelate the metal ion of component (f') of treatment solution B' is more preferred. Lactic acid, aqueous ascorbic acid, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, potassium hydroxide, arginine, or lysine is even more preferred, with sodium hydroxide, potassium hydroxide, and arginine being particularly preferred.

[0095] The powder used in the surface treatment method of the present invention is not particularly limited as long as it is used for industrial purposes or cosmetics (pigments, coloring matters, resins, pearls), and examples thereof include resin powders such as nylon powder, nylon beads, silicone beads, and polyethylene beads; metal oxides such as iron oxide (yellow pigment), iron oxide (red pigment), iron oxide (black pigment), tin oxide, chromium oxide, cobalt oxide, zinc oxide, pigment-grade zinc oxide, titanium oxide, pigment-grade titanium oxide, zirconium oxide, aluminum oxide, cerium oxide, fine particle titanium oxide, ultrafine particle titanium oxide, fine particle zinc oxide, and fine particle iron oxide; silicon-containing powders such as silicon oxides such as silicates (silicate (Al / Ca / Na), silicate (Na / Mg)), sericite, mica, talc, kaolin, bentonite, aluminum silicate, magnesium silicate, cubic sodium aluminosilicate, silicon carbide, hydrous silica, and anhydrous silica (leaf-shaped silica, nonporous silica, porous silica, porous silica, semiporous silica, etc.); Examples of suitable powders include metal fatty acid soaps such as magnesium stearate, magnesium myristate, and zinc stearate, carbon-containing powders such as cellulose, cellulose particles, starch, corn starch, rice starch, potato starch, wheat flour, wood powder, carbon black, graphite, ultramarine, Prussian blue, and carmine; lauroyl lysine; metal salts such as barium sulfate, platy barium sulfate, butterfly-shaped barium sulfate, calcium carbonate, and magnesium carbonate; fluorine-containing powders such as synthetic phlogopite (synthetic mica) and synthetic phlogopite iron; boron-containing powders such as boron nitride; composite powders such as pearl powders, colored pearl pigments, and titanium mica; waxes, pigments, and lakes. Furthermore, the powders may be surface-treated, for example, with silicone, a fluorine compound, a silane coupling agent, a silane, an organic titanate, a fatty acid, a metal soap, an oil, or an amino acid. Crystalline or amorphous powders such as resin powders, silicon-containing powders, metal oxides, carbon-containing powders, fluorine-containing powders, metal salts, boron-containing powders, and composite powders are preferred in terms of improving water repellency and oil repellency after treatment.Preferred powders include, for example, talc, mica, sericite, titanium oxide, red iron oxide, yellow iron oxide, black iron oxide, pearl powder, and colored pearl pigments.

[0096] In step (i"), treatment liquid A" is used in an amount of 0.5 parts by mass or more, preferably 1.0 parts by mass or more, more preferably 2.0 parts by mass or more, even more preferably 4.0 parts by mass or more, and particularly preferably 8.0 parts by mass or more, relative to 100 parts by mass of powder. Treatment liquid A" is used in an amount of 1000 parts by mass or less, preferably 100 parts by mass or less, more preferably 50.0 parts by mass or less, even more preferably 40.0 parts by mass or less, and particularly preferably 30 parts by mass or less, relative to 100 parts by mass of powder. Treatment liquid A" may be used in an amount of 0.5 to 1000 parts by mass, 1.0 to 100 parts by mass, 2.0 to 50.0 parts by mass, 4.0 to 40.0 parts by mass, or 8.0 to 30.0 parts by mass. Using treatment liquid A" in such amounts can improve several properties selected from hydrophilicity of the treated powder, favorable feel, and the like. In step (i"), the mass ratio of the powder to the treatment liquid A" is preferably 0.1 to 200.0, more preferably 1.0 to 100.0, even more preferably 2.0 to 50.0, particularly preferably 2.5 to 25, and most preferably 3.0 to 13. By using the treatment liquid A" in such an amount, it is possible to improve several properties selected from the hydrophobicity of the treated powder, the preferable feel, and the like.

[0097] In step (ii"), the mass ratio of the powder to treatment liquid B" is preferably 0.5 to 1000, more preferably 1.0 to 500, even more preferably 2.5 to 180, particularly preferably 5.0 to 100, particularly preferably 10 to 50, and most preferably 10.0 to 70. By using treatment liquid B" in such an amount, it is possible to improve several properties selected from the hydrophobicity of the treated powder and the preferable feel to the touch. Treatment liquid B" is preferably an aqueous solution having a pH of 9.0 or less, more preferably an aqueous solution having a pH of 8.0 or less, even more preferably an aqueous solution having a pH of 7.5 or less, and particularly preferably an aqueous solution having a pH of 7 or less. Treatment liquid B" may also be an acidic to alkaline aqueous solution. Specifically, the pH may be 3.0 to 9.0, 3.0 to 8.0, 3.0 to 7.5, 4.0 to 9.0, 4.0 to 8.0, 4.0 to 7.5, 4.5 to 9.0, 4.5 to 8.0, 4.5 to 7.5, 5.0 to 9.0, 5.0 to 8.0, or 5.0 to 7.5. The pH can be adjusted using aqueous citric acid, tartaric acid, lactic acid, malic acid, succinic acid, ascorbic acid, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, potassium hydroxide, etc., and it is preferable to use a pH adjuster that does not inhibit the salt formation between compound (a''') of treatment liquid A'' and the metal ions of component (f') of treatment liquid B'', more preferably a pH adjuster that does not chelate the metal ions of component (f') of treatment liquid B'', and even more preferably lactic acid, aqueous ascorbic acid, acetic acid, sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, sodium hydroxide, or potassium hydroxide. The powder used in the method for producing the surface-treated powder is the powder described above.

[0098] The treatment of the powder in steps (i") and (ii") may be carried out using a mixer selected from high-speed agitation mixers such as a Henschel mixer, FM mixer, high-shear mixer, vertical mixer, or planetary mixer; container rotation mixers or container rotation mixers with agitator such as a W-type mixer, CV-type mixer, V-type mixer, rocking mixer, container mixer, Bohle mixer, or container mixer equipped with a chopper; and compression / shear / impact mixers such as a paddle mixer, ribbon agitator, double-shaft paddle mixer, double-shaft planetary agitator, Nauta mixer, conical screw mechanical agitator mixer, airflow agitator mixer, Julia mixer, and Nobilta. From the viewpoint of scale-up, etc., the surface treatment agent composition and / or acidic liquid may be mixed by dropwise mixing or spray mixing. From the viewpoint of handling the treated powder, the method for producing a surface-treated powder of the present invention preferably does not include a drying step using power or equipment. In the method for producing the surface-treated powder of the present invention, step (ii") may be carried out after step (i"), or step (i") may be carried out after step (ii"). Either one or both of step (i") and step (ii") may be carried out multiple times. Furthermore, at least a part of step (i") may be carried out simultaneously with step (ii"), or at least a part of step (ii") may be carried out simultaneously with step (i").

[0099] The mixture obtained by mixing treatment liquid A" and treatment liquid B" forms a gel-like composition, which can improve several properties of the treated powder selected from hydrophilicity, a pleasant feel, and the like. The mixture obtained by mixing treatment liquid A" and treatment liquid B" forms a smooth gel-like composition on the surface of the powder, thereby producing a treated powder whose surface is coated with a smooth gel-like composition. The kinetic friction coefficient of the mixture obtained by mixing treatment liquid A" and treatment liquid B" is preferably 0.4 to 2.0, more preferably 0.4 to 1.5, and even more preferably 0.4 to 1.0. The kinetic friction coefficient can be measured as an average kinetic friction coefficient using a Tribomaster (manufactured by Trinity Labs, product name: TL201Ts). Specifically, the dried mixture was sprinkled on double-sided tape attached to a slide glass, and the excess powder was shaken off. Then, a tactile contactor (manufactured by Trinity Labs, product name: fingerprint type) was used to measure the kinetic friction coefficient using a Tribomaster (manufactured by Trinity Labs, product name: TL201Ts). The measurement conditions for the friction tester were a load of 50 gf, a test table movement speed of 25 mm / sec, and a measurement distance of 25 mm. The mixture obtained by mixing treatment liquid A" and treatment liquid B" preferably has a contact angle of 90° or less, more preferably 50° or less, and even more preferably 30° or less. By having the contact angle within the above range, it is possible to prepare a powder with excellent hydrophilicity when treated into a powder. The surface-treated powder of the present invention is characterized by hydrophilicity and can be suitably used in the formulation of aqueous cosmetics. The aqueous cosmetic may be a cosmetic whose solvent is water. The aqueous cosmetic may also be a cosmetic containing 50% or more, 60% or more, 70% or more, 80% or more, 90% or more, or 95% or more of water. The contact angle was measured by sprinkling the prepared surface treatment composition mixture powder on a 1.5 × 6 cm square double-sided tape (manufactured by Daikyosha, B-115 type) attached to a slide glass, shaking off excess powder, and then depositing 2.0 μL of water onto the surface using a fully automatic contact angle measuring device (manufactured by Kyowa Interface Science Co., Ltd., DMo-702), and measuring the contact angle of water after 10 seconds.The mixture obtained by mixing treatment liquid A" and treatment liquid B" preferably has a shear adhesion of 3000 Pa or more, more preferably 3200 Pa or more, and even more preferably 3400 Pa or more. When the shear adhesion is within the above range, a powder with an excellent moist feel can be prepared when processed into a powder. The shear adhesion can be measured in accordance with JIS [Z885:2016] using a dynamic viscoelasticity measuring device (Discovery HR 20, manufactured by TA Instruments) equipped with a powder rheology accessory manufactured by the same company.

[0100] The powder obtained by the method for producing a surface-treated powder of the present invention or the powder surface-treated with the treatment agent of the present invention can also be said to be a powder whose surface is coated with a composition containing compound (a'"), (e) water, and component (f'). The composition may further contain compound (g) and / or (b''). The acyl group or alkyl group in (a'") preferably has a carbon chain length of C8 to C22. Furthermore, (a'") preferably contains N-acylalanine and / or N-acyl-N-methyl-β-alanine. The powder obtained by the method for producing a surface-treated powder of the present invention, the powder surface-treated with the treatment agent of the present invention, or the surface-coated powder is excellent in multiple properties selected from, in particular, hydrophilicity and a pleasant feel to the touch. Furthermore, using the powder obtained by the method for producing a surface-treated powder of the present invention in a cosmetic composition may improve the stability and SPF value of the composition. The contact angle of the surface-treated powder is preferably reduced by 30% or more, more preferably 40% or more, and even more preferably 50% or more, compared to the corresponding untreated powder. Furthermore, when the corresponding untreated powder is hydrophilic, the contact angle is preferably reduced by 30% or more, more preferably 40% or more, compared to the corresponding untreated powder. Furthermore, when the corresponding untreated powder is hydrophobic, the contact angle is preferably reduced by 70% or more, more preferably 80% or more, compared to the corresponding untreated powder. When the corresponding untreated powder is hydrophilic, the contact angle of the corresponding untreated powder is less than 90°, and when the corresponding untreated powder is hydrophobic, the contact angle of the corresponding untreated powder is 90° or more. The composition that coats the surface of the powder forms a smooth gel-like composition on the surface of the powder, thereby producing a treated powder coated with a smooth gel-like composition. The dynamic friction coefficient of the composition is preferably 0.4 to 2.0, more preferably 0.4 to 1.5, and even more preferably 0.4 to 1.0. The dynamic friction coefficient can be measured as an average dynamic friction coefficient using a Tribomaster (manufactured by Trinity Labs, trade name: TL201Ts).Specifically, the dried mixture was sprinkled on double-sided tape attached to a glass slide, and excess powder was shaken off. Then, a tactile contactor (manufactured by Trinity Lab, finger model fingerprint type) was used to measure the friction sensation with a Tribomaster (manufactured by Trinity Lab, product name: TL201Ts). The measurement conditions for the friction tester were a load of 50 gf, a test table movement speed of 25 mm / sec, and a measurement distance of 25 mm. The contact angle of the composition is 90° or less, more preferably 50° or less, and even more preferably 30° or less. Having the contact angle within the above range makes it possible to prepare a powder with excellent hydrophilicity when processed into a powder. The contact angle of the composition can be measured by sprinkling the prepared surface treatment composition mixture powder on a 1.5 x 6 cm square double-sided tape (manufactured by Daikyo Co., Ltd., B-115 type) attached to a glass slide, shaking off excess powder, and then using a fully automatic contact angle measuring device (manufactured by Kyowa Interface Science Co., Ltd., DMo-702), dropping 2.0 μL of water onto the surface, and measuring the contact angle of water after 10 seconds. The shear adhesion of the composition is 3000 Pa or more, more preferably 3200 Pa or more, and even more preferably 3400 Pa or more. By having the shear adhesion within the above range, a powder with an excellent moist feel can be prepared when processed into a powder. The shear adhesion can be measured using a dynamic viscoelasticity measuring device (manufactured by TA Instruments, Discovery HR 20) equipped with a powder rheology accessory manufactured by the same company, in accordance with JIS [Z885:2016]. It was confirmed that the shear adhesive strength of the surface-treated powder coated with the composition was increased synergistically by combining two or more components in Treatment Solution A''. The synergistic increase in shear adhesive strength confirmed that a powder with excellent moist feeling could be prepared.

[0101] The mass proportions of compound (a'"), compound (b"), and compound (g) in the composition of the surface-coated powder can be measured, for example, by high performance liquid chromatography (HPLC). Specifically, the mass proportions of compound (a'"), compound (b"), and compound (g) can be calculated from the peak areas of compound (a'"), compound (b"), and compound (g) detected using high performance liquid chromatography (column: reverse phase column, temperature: 40°C, eluent: methanol / 30 mM NaHPO (pH = 2.5) = 85 / 15 (v / v), detection: 220 nm).

[0102] Cosmetic compositions containing powders surface-treated by the method for producing surface-treated powders of the present invention, or cosmetic compositions containing powders surface-treated with the treating agent of the present invention, or the surface-coated powders, can be formulated into any form of cosmetic that can be applied to desired areas (e.g., skin, hair, scalp, lips, eyes, eyelashes, eyelids, nails) using conventional methods. Examples of cosmetics for skin, lips, eyelashes, and nails include sunscreens such as sunscreens, body powders, and sprays; makeup cosmetics such as foundations, primers, body colors, bronzers, face powders, nail polishes, cheek colors, makeup bases, and concealers; lip cosmetics such as lip colors, lip liners, and lipsticks; eye makeup cosmetics such as eyeliners, eye shadows, eyebrow makeup, and mascara; leave-on cosmetics such as emulsions, lotions, creams, gels, and serums; and face masks. Examples of cosmetics for hair include hair styling agents, hair emulsions, hair treatments, hair conditioners, and hair lotions. Examples of cosmetics for the scalp include hair growth agents. Preferred cosmetics include makeup cosmetics, eye makeup cosmetics, lip cosmetics, and leave-on cosmetics. Preferred topical preparations include ointments, creams, mousses, and gels.

[0103] In addition to compound (a'"), compound (g), compound (b"), compound (e), and compound (f'), various base materials can be used in combination with the cosmetic raw material composition of this embodiment depending on the application and purpose, as long as the object of the present invention is not impaired. Specific examples include natural gums such as gum arabic and gum tragacanth, glucosides such as saponin, cellulose derivatives such as methylcellulose, carboxycellulose, and hydroxymethylcellulose, natural polymers such as lignin sulfonates and shellac, dispersants such as anionic polymers such as polyaspartates, polyacrylates, salts of styrene-acrylic acid copolymers, salts of vinylnaphthalene-maleic acid copolymers, sodium salts of β-naphthalenesulfonic acid-formalin condensates, and phosphates, and nonionic polymers such as polyvinyl alcohol, polyvinylpyrrolidone, and polyethylene glycol;

[0104] Higher fatty acid salts (soaps), salts of higher fatty acids having 8 to 22 carbon atoms in the hydrophobic group, and N-acylamino acid anionic surfactants: the acyl group may be derived or be derivable from a linear or branched, saturated or unsaturated fatty acid having 8 to 22 carbon atoms, such as octanoyl, caproyl, nonanoyl, caprinoyl, decanoyl, undecanoyl, lauroyl, myristoyl, palmitoyl, stearoyl, arachidinoyl, behenoyl, palmitoleoyl, oleoyl, or linoleoyl, or a natural mixed fatty acid acyl group such as coconut oil fatty acid acyl or hydrogenated beef tallow fatty acid acyl, or an aromatic carboxylic acid acyl group such as benzoic acid acyl. While such acyl groups can be derived from fatty acids, they can also be derived from raw materials other than fatty acids (such as fatty acid esters, fatty acid salts, acid halides, and acid anhydrides).The constituent amino acids include the above-mentioned acidic amino acids such as aspartic acid, or amino acids such as alanine, valine, leucine, isoleucine, proline, methionine, cysteine, tryptophan, tyrosine, phenylalanine, asparagine, glutamine, serine, threonine, oxyproline, β-aminopropionic acid, γ-aminobutyric acid, anthranilic acid, m-aminobenzoic acid, and p-aminobenzoic acid, or salts thereof, alkyl ether carboxylates, amide ether carboxylates, alkyl sulfates (AS), polyoxyethylene alkyl ether sulfates (AES), alkyl ether sulfates, sulfates of higher fatty acid esters, sulfates of higher fatty acid alkylolamides, sulfated oils and fats, ... Anionic surfactants such as ethylene styrenated phenyl ether sulfate, alpha-olefin sulfonate (AOS), alkylbenzene sulfonate, alkylnaphthalene sulfonate, alkyl sulfonate (SAS), dialkyl sulfosuccinate, alpha-sulfonated fatty acid salt, alkane sulfonate, sulfonate of higher fatty acid ester, alpha-sulfonated fatty acid salt, sulfonate of higher fatty acid amide, N-acyl-N-alkyl taurate, N-acyl-N-methyl taurate, alkyl phosphate, alkyl ether phosphate, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkylphenyl ether phosphate, naphthalene sulfonate formalin condensate, etc.;

[0105] Avocado oil, almond oil, camellia seed oil, argania spinosa kernel oil, apricot kernel oil, rosa canina fruit oil, canola oil, kukui nut oil, passionflower seed oil, cranberry seed oil, black currant seed oil, pomegranate seed oil, cottonseed oil, sclerocarya birrea seed oil, grape seed oil, camellia oil, evening primrose oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, hybrid safflower oil, hybrid sunflower oil, baobab seed oil, peanut oil, pistachio oil, sunflower seed oil, hazelnut oil, mango seed oil, meadowfarm oil, mozzarella Liquid oils and fats such as perilla kernel oil, European raspberry seed oil, borage seed oil, horseradish seed oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, rice germ oil, triglycerin, glycerin trioctanoate, glycerin triisopalmitate, glycerin triisooctanoate, and glyceryl tri-2-ethylhexanoate cholesterol fatty acid ester; solid oils and fats such as cocoa butter, coconut oil, horse fat, hydrogenated coconut oil, palm oil, beef tallow, mutton tallow, hydrogenated beef tallow, palm kernel oil, lard, beef bone fat, Japan wax kernel oil, hydrogenated oil, beef trotter fat, Japan wax, hydrogenated castor oil, Astrocaryum rumuru seed oil, African mango kernel oil, shea butter, and Theobroma grandiflorum seed oil;

[0106] Hydrocarbons such as paraffin, liquid paraffin, heavy liquid paraffin, light liquid paraffin, petrolatum, ceresin, microcrystalline wax, isoparaffin, ozokerite, squalene, pristane, squalane, isododecane, and isohexadodecane; waxes such as beeswax, spermaceti, lanolin, carnauba wax, candelilla wax, cotton wax, bayberry wax, ivory wax, montan wax, rice bran wax, koji wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, hydrogenated jojoba oil, reduced lanolin, jojoba wax, hard lanolin, shellac wax, polyoxyethylene cholesterol ether, polyoxyethylene lanolin alcohol ether, polyoxyethylene lanolin alcohol acetate, lanolin fatty acid polyethylene glycol, polyoxyethylene hydrogenated lanolin alcohol ether, and derivatives thereof;

[0107] Higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, behenic acid, undecylenic acid, 12-hydroxystearic acid, palmitoleic acid, oleic acid, lanolin fatty acid, hard lanolin fatty acid, soft lanolin fatty acid, linoleic acid, linolenic acid, erucic acid, docosahexaenoic acid, eicosapentaenoic acid, isohexadecanoic acid, anteisohenicosanoic acid, 12-hydroxystearic acid, long-chain branched fatty acids, dimer acids, hydrogenated dimer acids, and their aluminum salts, calcium salts, magnesium salts, zinc salts, potassium salts, and other metal soaps, and nitrogen-containing derivatives such as amides; lauryl alcohol Chole, myristyl alcohol, cetanol, cetearyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, jojoba alcohol, chimyl alcohol, selachyl alcohol, batyl alcohol, lanolin alcohol, hydrogenated lanolin alcohol; higher alcohols such as hexyldecanol, octyldodecanol, decyltetradecanol, hexyldecanol, isostearyl alcohol, 2-octyldodecanol, and dimer diol; higher alcohols and derivatives such as arachidyl alcohol and arachyl alcohol; sterols such as cholesterol and phytosterol;

[0108] Isopropyl myristate, butyl stearate, ethylhexyl stearate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, isostearyl isostearate, isopropyl isostearate, ethyl isostearate, octyldodecyl isostearate, cholesteryl isostearate, isostearate Hydrogenated castor oil phosphate, phytosteryl isostearate, hexyldecyl isostearate, isotridecyl isononanoate, isononyl isononanoate, ethylhexyl isononanoate, stearyl ethylhexanoate, glyceryl (ethylhexanoate / stearate / adipic acid), cetyl ethylhexanoate, cetearyl ethylhexanoate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, propylene glycol dicaprylate, dicapryl PG (capric acid / capric acid), PG dicaprate, neopentyl glycol dicaprate, diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, glycerin tri-2-ethylhexanoate, trimethylolpropane triisostearate, cetyl-2-ethylhexanoate, 2-ethylhexyl palmitate, glycerin trimyristate, glycerin tri-2-heptylundecanoate Lid, castor oil fatty acid methyl ester, ethyl oleate, cetostearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, diisopropyl adipate, N-lauroyl-L-glutamic acid 2-octyldodecyl ester, di-2-heptylundecyl ethyl laurate adipate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate,Ester oils such as ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, and alkyl benzoate (C12-15);

[0109] Volatile and non-volatile silicones such as dimethylpolysiloxane, polyether-modified silicone, alcohol-modified silicone, methylphenylpolysiloxane, epoxy-modified silicone, fluorine-modified silicone, alkyl-modified silicone, alkoxy-modified silicone, amino-modified silicone, polymeric silicone, volatile silicone, and cyclic silicone; polyols such as glycerin, diglycerin, polyglycerin, 1,3-butanediol, propanediol, and polyethylene glycol;

[0110] moisturizing agents such as alkylglycines such as N-methylglycine, N,N-dimethylglycine, N,N,N-trimethylglycine, N-ethylglycine, and glycylbetaine; (poly)saccharides such as sorbitol, raffinose, pyrrolidone carboxylates, lactates, hyaluronates, ceramides, trehalose, xylobiose, maltose, sucrose, glucose, and vegetable mucilage polysaccharides, and derivatives thereof; glycosaminoglycans and salts thereof such as water-soluble chitin, chitosan, pectin, and chondroitin sulfate and salts thereof; amino acids and salts thereof such as glycine, serine, threonine, alanine, aspartic acid, tyrosine, valine, leucine, arginine, glutamine, and prophosphate; sugar amino acid compounds such as aminocarbonyl reactants; plant extracts such as aloe vera, marronnier, and the like; urea, uric acid, ammonia, glucosamine, creatinine, and nucleic acid-related substances such as DNA and RNA;

[0111] Water-soluble and oil-soluble polymers such as hydroxyethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyltrimethylammonium chloride ether, methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, methylhydroxypropyl cellulose, soluble starch, carboxymethyl starch, methyl starch, propylene alginate, glycol esters, polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl methyl ether, carboxyvinyl polymers, polyacrylates, guar gum, locust bean gum, quince seed, carrageenan, galactan, gum arabic, pectin, mannan, starch, xanthan gum, dextran, succinoglucan, curdlan, hyaluronic acid, gelatin, casein, albumin, collagen, methoxyethylene maleic anhydride copolymers, amphoteric methacrylate copolymers, polydimethylmethylene piperidinium chloride, polyacrylic acid ester copolymers, polyvinyl acetate, nitrocellulose, silicones, and resins;

[0112] thickening and foam-increasing ingredients such as cationic cellulose derivatives, cationic starch, cationic guar gum derivatives, diallyl quaternary ammonium salt / acrylamide copolymers, quaternized polyvinylpyrrolidone derivatives, quaternized vinylpyrrolidone / vinylimidazole polymers, polyglycol / amine condensates, quaternized collagen polypeptides, polyethyleneimine, cationic silicone polymers, adipic acid / dimethylaminohydroxypropyldiethylenetriamine copolymers, polyaminopolyamides, cationic chitin derivatives, cationic polymers such as quaternized polymers, polyethylene glycol fatty acid esters, polyoxyethylene fatty acid ester methylglycosides, and tetradecene sulfonates;

[0113] Oil gelling agents such as dextrin fatty acid esters, glycerin fatty acid esters, and hydroxystearic acid; sequestering agents such as ethylenediaminetetraacetic acid and its salts, hydroxyethylenediaminetriacetic acid and its salts, phosphoric acid, ascorbic acid, succinic acid, gluconic acid, polyphosphates, metaphosphates, and hinokitils;

[0114] antiseptics and antibacterial agents such as parahydroxybenzoic acid esters, benzoic acid and its salts, phenoxyethanol, hinokitiol, salicylic acid and its salts, sorbic acid and its salts, dehydroacetic acid and its salts, parachlormetacresol, hexachlorophene, boric acid, resorcinol, tribromosalan, orthophenylphenol, thiram, photosensitizer No. 201, halocarban, trichlorocarbanide, tocopherol acetate, zinc pyrithione, phenol, isopropylmethylphenol, 2,4,4-trichloro-2-hydroxyphenol, hexachlorophene, chlorhexidine, benzethonium chloride, benzalkonium chloride, cetylpyridinium chloride, dequalinium chloride, stearyldimethylammonium chloride, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, methylbenzethonium chloride, lauryltrimethylammonium chloride, lauroylcholaminoformylmethylpyridinium chloride, triclosan, and Biosol;

[0115] pH adjusters such as citric acid, malic acid, adipic acid, glutamic acid, and aspartic acid; and anti-dandruff and anti-itch agents such as trichlorocarbanilide, salicylic acid, zinc pyrithione, isopropylmethyl, and phenol.

[0116] Benzoic acid-based ultraviolet absorbers such as para-aminobenzoic acid, para-aminobenzoic acid monoglycerin ester, N,N-dipropoxypara-aminobenzoic acid ethyl ester, N,N-diethoxypara-aminobenzoic acid ethyl ester, N,N-dimethylpara-aminobenzoic acid ethyl ester, N,N-dimethylpara-aminobenzoic acid butyl ester, and N,N-dimethylpara-aminobenzoic acid ethyl ester; anthranilic acid-based ultraviolet absorbers such as homomenthyl-N-acetylanthranilate; salicylic acid-based ultraviolet absorbers such as salicylic acid and its sodium salt, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanolphenyl salicylate; octyl cinnamate, ethyl- cinnamic acid-based ultraviolet absorbers such as 4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxycinnamate, 2-ethylhexyl-p-methoxycinnamate (octyl para-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate (cinoxate), cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate (octocurine), glyceryl mono-2-ethylhexanoyl-di-para-methoxycinnamate, ferulic acid and its derivatives;2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4- Benzophenone-based ultraviolet absorbers such as methoxybenzophenone (oxybenzone-3), 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, and 4-hydroxy-3-carboxybenzophenone; 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole; 2-(2'-hydroxy-5'-methylphenylbenzotriazole); dibenzalazine; dianisoylmethane; 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one; dibenzoylmethane derivatives such as 4-t-butylmethoxydibenzoylmethane; octyl triazone; urocanic acid derivatives such as urocanic acid and ethyl urocanate; ultraviolet absorbers such as 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 1-(3,4-dimethoxyphenyl)-4,4-dimethyl-1,3-pentanedione, hydantoin derivatives such as 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidinepropionate, phenylbenzimidazol sulfonic acid, terephthalylidene dicamphor sulfonic acid, drometrizole trisiloxane, methyl anthranilate, rutin and its derivatives, and oryzanol and its derivatives;

[0117] Ascorbic acid and its salts (alkali metal salts or alkaline earth metal salts such as sodium salt, potassium salt, magnesium salt, calcium salt, etc., as well as ammonium salt, amino acid salt, etc.), ascorbic acid derivatives (L-ascorbic acid alkyl ester, L-ascorbic acid phosphate ester and its salt, L-ascorbic acid-2-sulfate ester and its salt, L-ascorbic acid glucoside, etc.), alkoxysalicylic acid and its salt (alkoxy groups include, for example, methoxy group, ethoxy group, propoxy group, isopropoxy group, butoxy group, etc.), , isobutoxy group, etc.), whitening agents such as hydroquinone glycosides and their derivatives (arbutin, etc.), kojic acid and its derivatives, ellagic acid, chamomile extract, althea extract, licorice extract, mulberry bark extract, raspberry extract, apple flavonoids, bran extract, vitamin E and its derivatives, hinokitiol, placenta extract, rucinol, chamomilla ET, glutathione, clove extract, tea extract, astaxanthin, bovine placenta extract, tranexamic acid and its derivatives, resorcinol derivatives, azulene, and gamma-hydroxybutyric acid;

[0118] Blood circulation promoters such as Swertia japonica extract, cepharanthine, vitamin E and its derivatives, and gamma oryzanol; local stimulants such as capsicum tincture, angelica rhododendron tincture, cantharides tincture, and nicotinic acid benzyl ester; nutrients such as various vitamins and amino acids; female hormones; hair root activators;

[0119] Anti-inflammatory agents such as ricyrrhetic acid, glycyrrhizic acid derivatives, allantoin, azulene, aminocaproic acid, and hydrocortisone; astringents such as zinc oxide, zinc sulfate, allantoin hydroxyaluminum, aluminum chloride, aluminum sulfate, zinc sulfocarbonate, tannic acid, citric acid, and lactic acid; refreshing agents such as menthol and camphor; antihistamines such as diphenhydramine hydrochloride, chlorpheniramine maleate, and glycyrrhizic acid derivatives;

[0120] Antioxidants such as tocopherols, BHA, BHT, gallic acid, and NDGA; sebum suppressants such as estradiol, estrone, and ethinylestradiol; exfoliants and dissolvers for keratin such as sulfur, salicylic acid, and resorcinol; alpha-hydroxy acids such as glycolic acid, lactic acid, malic acid, tartaric acid, and citric acid; and beta-hydroxy acids such as salicylic acid.

[0121] Purified water, other ingredients: kakyō extract, N-methyl-L-serine, whey, nicotinamide, diisopropylamine dichloroacetic acid, mevalonic acid, gamma-aminobutyric acid (including gamma-amino-β-hydroxybutyric acid), althaea extract, aloe extract, apricot kernel extract, turmeric extract, oolong tea extract, dried seawater, hydrolyzed wheat powder, hydrolyzed silk, carrot extract, cucumber extract, gentian extract, yeast extract, rice germ oil, comfrey extract, soapwort extract, di Examples of the ingredients that can be included include: burdock root extract, lithospermum root extract, birch extract, peppermint extract, Swertia japonica extract, bisabolol, propolis, loofah extract, linden extract, hop extract, horse chestnut extract, soapberry extract, melissa extract, eucalyptus extract, saxifrage extract, rosemary extract, Roman chamomile extract, royal jelly extract, seaweed, rice bran, licorice, tangerine peel, angelica tree, ground peach leaf, sphingolipids, guai, azulene, and vitamin C. The present invention will now be described in more detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0122] Test Example 1 Preparation of Compositions and Test of Storage Stability at Low Temperature (Preparation of Compositions) Components (a), (b), (c), (d), and (e) shown in Table 1 and other components were mixed and dissolved at the concentrations shown in Table 1 to prepare compositions, which were used for the following evaluations.

[0123] (Evaluation after Preparation) The uniformity of the obtained composition was visually evaluated based on the following criteria.

[0124] (Evaluation after long-term storage at low temperature and 25°C) The composition was filled into a 20 mL transparent glass bottle, capped, and left to stand at -5°C, 0°C, and 25°C, respectively. After storage for 1 month and 3 months, the bottle was removed from the storage cabinet and left to stand for about 3 hours, and then returned to room temperature, after which the state of solution was visually confirmed. The state of solution (homogeneity (presence or absence of separation), presence or absence of precipitates or floating matter) was visually judged based on the following criteria. (Evaluation criteria) D: Obvious precipitates or floating matter are observed C: Precipitates or floating matter are observed, thinly covering the bottom or the liquid surface B: Precipitates or floating matter are observed sparsely on the bottom or the liquid surface A: Precipitates or floating matter are observed, but when stirred at room temperature, they dissolve and become a translucent aqueous solution S: A translucent aqueous solution, with no precipitates or floating matter observed SS: A transparent aqueous solution, with no precipitates or floating matter observed

[0125] (Evaluation after long-term storage at 50°C) The compositions were filled into 20 mL transparent glass bottles, capped, and left to stand at 50°C. After storage for 3 months, the bottles were removed from the storage cabinet and left to stand for about 3 hours, and the state of solution was evaluated visually after returning to room temperature. For compositions that were transparent and no precipitate or floating matter was observed, the transmittance at 430 nm was measured and evaluated based on the following criteria. (Evaluation criteria) D: Precipitates or floating matter were observed C: Precipitates or floating matter were observed to a thin extent covering the bottom or the liquid surface B: Precipitates or floating matter were observed sparsely on the bottom or the liquid surface A: A semi-transparent aqueous solution with no precipitates or floating matter observed S: A transparent aqueous solution with no precipitates or floating matter observed and a transmittance of 90% or more but less than 94% SS: A transparent aqueous solution with no precipitates or floating matter observed and a transmittance of 94% or more

[0126]

[0127] In the comparative examples, precipitates and floating matter were observed regardless of the time period and temperature, and deterioration with time was confirmed. In the surface treatment agent compositions of the examples, no precipitates or floating matter were observed even when stored at low temperatures for a long period of time, and it was confirmed that they have excellent storage stability.

[0128] Test Example 2 Evaluation of Antifungal Effect of Surface Treatment Composition A (Preparation of Compositions) Each composition prepared by mixing and dissolving the components (a), (b), (c), (d), and (e) listed in Table 2 and other components at the concentrations listed in Table 2 was used for the following evaluation.

[0129] (Anti-fungal Effect Evaluation Test) A preservative effectiveness test was conducted in accordance with the "Preservative Effectiveness Test Method of the 18th Revised Japanese Pharmacopoeia (JP18)". 1. Test strain A. b: Aspergillus brasiliensis (Aspergillus niger) NBRC 9455 2. Preparation of test bacterial solution Pre-cultured on Sabouraud glucose agar medium at 22.5°C for 6 to 10 days. The pre-cultured bacteria were scraped with a platinum loop and suspended in sterilized saline containing 0.05% by mass of polysorbate 80. Approximately 10 7 The test bacterial solution was prepared by adjusting the concentration to bacteria / mL. 3. Inoculation and storage of bacteria 20 g of each specimen was placed in a sterile vial, and 0.15 mL of the test bacterial solution was inoculated, and the number of inoculated bacteria was measured. Each specimen was stored at 25°C, and the viable bacterial count was measured on the 7th, 14th, 21st, and 28th days. 4. Evaluation The viable bacterial count was measured by the pour plate method using the following medium. Fungi: GPLP agar medium Evaluation was made according to the following criteria. (Evaluation criteria) SS: A reduction of 1.5 Log or more by day 7, a reduction of 2.5 Log or more by day 14, and death by day 21 S: Other than SS, death by day 21 A: Death by day 28 B: Not death by day 28, but a reduction of 4 Log or more C: Not death by day 28, but a reduction of 3 Log or more D: A reduction of 2 Log or less in the number of live bacteria even by day 28 E: A reduction of 1 Log or less in the number of live bacteria even by day 28

[0130]

[0131] Reference Examples 1 and 2, which contain arginine, showed high antifungal effects. On the other hand, Reference Example 4, which does not contain compound (a) or compound (b), showed no antifungal effects even when it contained arginine. When the arginine content was 0.75% by mass or less (Reference Example 3), no antifungal effects were observed.

[0132] Test Example 3 Evaluation of physical properties and functionality of powder compositions (Preparation of powder compositions) Various untreated powder components shown in Tables 3-1 and 3-2 were weighed and stirred in a 75 mL mill and mixer (TML162, manufactured by Tescom Co., Ltd.), and then surface treatment composition A or its comparative composition was added and mixed. Thereafter, surface treatment composition B or its comparative composition shown in Tables 3-1 and 3-2 was added and mixed to obtain each powder composition.

[0133] (Evaluation of powder hydrophobicity) 20 mg of the powder composition of each of the Examples, Comparative Examples, and Reference Examples was added to 10 g of water, and the appearance of the powder immediately after addition to 60 minutes later was evaluated based on the following evaluation criteria. (Evaluation criteria) S: Almost all of the powder floats in the water even after stirring 60 minutes later A: The powder floats in the water 60 minutes later, but sinks slightly when impacted B: Almost all of the powder floats in the water immediately after addition, but sinks slightly after 60 minutes C: The water layer becomes cloudy immediately after addition, and scattered powder can be seen on the bottom of the container after 60 minutes D: The water layer becomes cloudy immediately after addition, and powder can be seen covering the entire bottom of the container

[0134] (Evaluation of hydrophobic storage stability of powder) The samples used in (Evaluation of hydrophobicity of powder) were stored in a storage cabinet at 40°C for one month, and then the appearance of each sample was evaluated based on the following evaluation criteria. (Evaluation criteria) S Almost all of the powder floats on water even after storage at 40°C A After storage at 40°C, powder clumps of 10 grains or less are observed on the bottom of the container B Below A and above C C After storage at 40°C, powder is observed scattered on the bottom of the container (about half of the container bottom is visible) D After storage at 40°C, powder is observed covering the entire bottom of the container

[0135] (Evaluation of water / oil partitioning of powder) The same procedure as in (Evaluation of powder hydrophobicity) was carried out, and 60 minutes had passed after the procedure, to a sample. 5 g of hydrocarbon oil (isododecane) was added, and the sample was stirred five times. The appearance of the powder was evaluated based on the following evaluation criteria. (Evaluation criteria) S: Almost all of the powder is present at the water-oil interface or in the oil layer, or adheres to the surface of oil droplets on the container wall. A: The water layer is transparent, and some of the powder sinks. B: The water layer is transparent, and scattered powder can be seen on the bottom of the container. C: The water layer is cloudy, and scattered powder can also be seen on the bottom of the container. D: The water layer is cloudy, and powder can be seen all over the bottom of the container.

[0136] (Evaluation of water / oil partition stability of powder) The specimens used in (Evaluation of water / oil partitioning of powder) were stored in a 40°C storage cabinet for one month, and then the appearance of each specimen was evaluated based on the following evaluation criteria. (Evaluation criteria) S After storage at 40°C, almost all of the powder remains at the water / oil interface or oil layer, or adheres to the surface of oil droplets on the container wall A After storage at 40°C, the water layer is transparent, but some powder sinks B Below A and above C C After storage at 40°C, scattered powder can be seen on the bottom of the container (about half of the container bottom is visible) D After storage at 40°C, powder can be seen on the entire bottom of the container

[0137] (Evaluation of Powder Adhesion) 5 g of the compositions of the Examples, Comparative Examples, and Reference Examples were weighed into a 50 mL glass vial, and one 18 mm square cover glass whose mass had been measured was placed vertically in the vial, which was then capped and shaken for 1 minute. The cover glass was removed and lightly tapped three times to remove excess powder, after which the amount of powder adhering per 1 cm square was calculated from the amount of powder adhering to the cover glass. The same procedure was performed three times for each sample, and the average amount of adhesion was calculated. The change in the amount of adhesion relative to the amount of untreated powder (control) was evaluated based on the following evaluation criteria. (Evaluation Criteria) S: 10 times or more of the control A: 5 times or more but less than 10 times the control B: 2 times or more but less than 5 times the control C: Equivalent to or more than the control but less than 2 times D: Less than the control

[0138] (Evaluation of Emulsion Formulation) (Preparation of Emulsion Formulation Using Powder) An emulsion formulation was prepared as follows: A total of 9.6% by mass of each powder composition was added to Phase B (20.5% by mass of dimethicone, 5% by mass of isopropyl lauroyl sarcosine, 5% by mass of ethylhexyl methoxycinnamate, 3.5% by mass of trimethylsiloxysilicate, 2% by mass of PEG-20 hydrogenated castor oil tristearate, 3% by mass of lauroyl lysine, 1% by mass of lauryl PEG-9 polydimethylsiloxyethyl dimethicone, 1% by mass of PEG-9 polydimethylsiloxyethyl dimethicone, and 1% by mass of disteardimonium hectorite), and the mixture was dispersed for 20 minutes using a disper. While stirring the mixed phase in this manner, a separately premixed phase A (45.4% by mass of water, 2% by mass of pentylene glycol, 0.5% by mass of sodium chloride, and 0.5% by mass of phenoxyethanol) was slowly added dropwise, and emulsified using a homomixer to prepare each emulsion formulation.

[0139] (Evaluation of the quality of the emulsion formula) For each formula, 1 to 5 mg of the formula was collected from 10 different collection locations, placed on a glass plate, and sandwiched between two other glass plates. The number of pigment particles observed was evaluated based on the following evaluation criteria. (Evaluation criteria) A: No pigment particles were observed B: One pigment particle was observed C: Two pigment particles were observed D: Three or more pigment particles were observed

[0140] (Evaluation of storage stability of emulsion formulations) Each formulation was filled into a 20 mL glass vial and stored at 40°C for one month, after which the state of each formulation was evaluated based on the following evaluation criteria. Formulations that showed no separation or pigment streaks after one month and received an evaluation of A were further stored for two months and evaluated based on the following evaluation criteria. (Evaluation criteria) S: No separation or pigment streaks observed even after two months of storage A: No separation or pigment streaks observed B: Pigment streaks observed at the interface, but no separation C: Clear syneresis at the top D: Clear syneresis at the top, with color unevenness also observed

[0141] (Evaluation of in-vitro SPF values ​​for emulsion formulations) An equal amount of each emulsion formulation was weighed onto a PMMA plate and spread evenly using a bar coater to create an evaluation plate, and it was confirmed that the mass difference between the comparative samples was less than ±4% one minute after the start of application. The in-vitro SPF values ​​were measured using an SPF analyzer UV-2000S (Labsphere). The same procedure was performed three times for each sample, and the average in-vitro SPF value was calculated. Using the in-vitro SPF value of a formulation prepared using untreated powder as a control, the change in the SPF value for each formulation was calculated and evaluated based on the following evaluation criteria. (Evaluation criteria) S: 2 times or more A: 1.7 times or more but less than 2 times B: 1.5 times or more but less than 1.7 times C: 1.2 times or more but less than 1.5 times D: Less than 1.2 times, 1 time or more E: Less than control

[0142] (Evaluation of Water Resistance of Coating Films in Emulsion Formulations: Durability) Using each plate evaluated in (Evaluation of In-Vitro SPF Values ​​in Emulsion Formulations), water was sprayed onto the plate three times from a distance of 10 cm, and then excess water was removed and the surface was dried. The in vitro SPF value was measured using an SPF analyzer UV-2000S (Labsphere), and the in vitro SPF value reduced compared to the value before water spraying was calculated. The same procedure was performed three times for each specimen, and the average of the in vitro SPF value reduced compared to before water spraying was calculated and evaluated based on the following evaluation criteria. (Evaluation Criteria) A: Reduction of less than 30% compared to the initial value B: Reduction of less than 40% compared to the initial value C: Reduction of less than 50% compared to the initial value D: Reduction of 50% or more compared to the initial value

[0143] (Evaluation of Covering Power of Emulsion Formula) According to the method using a 4.4 test plate of JIS K 5600-4-1:1999, the average value of three measurements was taken as the hiding power using a fund type cryptometer (manufactured by Coating Tester Co., Ltd.). The hiding power of the emulsion formula of each Example and Comparative Example was evaluated based on the following evaluation criteria. (Evaluation Criteria) S: 20 m2 / L or more A: 17 m2 / L or more, less than 20 m2 / L B: 15 m2 / L or more, less than 17 m2 / L C: 12 m2 / L or more, less than 15 m2 / L D: Less than 12 m2 / L

[0144] (Sensory evaluation of color change and uneven application in emulsion formula) Approximately 0.15 g of each emulsion formula was taken and applied to one cheek, and the color change and the absence of streaks and unevenness were visually evaluated. Four evaluators evaluated on a 5-point scale according to the following scoring criteria, and the total score for each was determined based on the following criteria. (Scoring criteria) 5 points: No color change upon application and even finish 4 points: Almost no color change upon application or uneven finish 3 points: Some color change upon application or uneven finish is observed 2 points: Some color change upon application or uneven finish is observed 1 point: Some color change upon application and uneven finish is observed (Evaluation criteria) A: 15-20 points B: 10-14 points C: 9 points or less

[0145]

[0146] The powder compositions of the Examples listed in Tables 3-1 and 3-2 were excellent in the evaluation of the stability of physical properties and adhesion. Furthermore, the powder compositions of the Examples were uniformly dispersed in the emulsion formulation, and there was no color unevenness in the appearance after production, making the formulation excellent. Furthermore, it was confirmed that there was no unevenness in application when applied to the skin, and the SPF value and its sustainability and covering power of the coating film were excellent, and that the formulation was also excellent in stability. Note that such a high effect was not observed when the surface treatment composition was directly added to the formulation without being applied to the powder.

[0147] Test Example 4: Evaluation of moisturizing properties of emulsion formulations containing powder compositions In a constant temperature and humidity room (23°C, 40% relative humidity (RH)), subjects were rinsed with 3 L of 35°C water and allowed to acclimate for 30 minutes. The moisture content of the stratum corneum on the flexor side of the forearm was measured as a skin capacitance value using a Corneometer CM 825 (Courage+Khazaka Co., Ltd.) and recorded as the initial value. Approximately 10 mg of each of the emulsion formulations prepared as described above, each containing 9.6% by mass of Example 13 and Comparative Example 10, was applied to the flexor side of the forearm (application area: 2.3 cm). 2) and applied with a finger, the moisture content of the stratum corneum after 8 hours was measured in the same manner, and the change from the initial value was calculated. Similarly, the results of N=5 measurements were averaged to evaluate the moisturizing properties of each emulsion formulation. Furthermore, tests were also conducted using emulsion formulations containing 9.6% by mass of untreated powder (pigment-grade titanium oxide 16.67 g, red iron oxide 0.42 g, yellow iron oxide 2.71 g, and black iron oxide 0.21 g) as Reference Example 10 and 9.6% by mass of a powder mixture of dimethicone-treated titanium oxide and iron oxide (SA-Titanium CR-50 (16.67 g), SA-Red R-516PS (0.42 g), SA-Yellow LL-100P (2.71 g), and SA-Black BL-100P (0.21 g)) as Reference Example 11. As a result, the change in stratum corneum moisture content after 8 hours from the initial value in Example 13 was 110%, whereas Comparative Example 10 and Reference Example 11 (dimethicone-treated powder) showed almost no change from the initial value, being 102% and 99%, respectively, and Reference Example 10 (untreated powder) was 97%. This confirmed that the powder composition of Example 13, in its emulsion formulation, has excellent skin moisturizing properties.

[0148] Test Example 5 Evaluation of change in color difference of powder composition upon wetting with water / oil: durability (Preparation of test powder) (Example 42) Using 20 g of mica, 3.63 g of the composition of Example 9, and 0.79 g of surface-treated composition B (aqueous solution of 34.8% by mass of calcium chloride), a powder composition was obtained in the same manner as in Test Example 3. (Comparative Example 15) Using 20 g of mica, 3.63 g of the composition of Example 9, and 0.74 g of comparative composition B (aqueous solution of 50% by mass of citric acid), a powder composition was obtained in the same manner as in Test Example 3. (Reference Example 12) Dimethicone-treated mica (SA-mica Y-2300) was used as the powder composition. 0.6 g of artificial sebum (a mixture of caprylic / capric triglyceride, octyldodecyl myristate, oleic acid, and squalene) was blended with 0.5 g of the above powder composition, and the L value after application of the artificial sebum relative to the initial L value was measured using a spectrophotometer CM-700d (Konica Minolta Inc.). The average value of each of the three measurements was evaluated as color dullness due to sebum. Furthermore, water was used instead of artificial sebum, and the L value was measured after 5 hours of blending with water, and color dullness due to water was also tested in the same manner. The results are shown in Table 4. Example 42 was superior to Comparative Example 15 and Reference Example 12 in terms of reduced color dullness due to sebum and water.

[0149]

[0150] Test Example 6: Evaluation of the preservative effect of the powder composition (Reference Example 13) 2.5 kg of titanium oxide, 62.5 g of red iron oxide, 406.0 g of yellow iron oxide, and 31.3 g of black iron oxide were weighed out and mixed into a 9 L Henschel mixer (FM10, manufactured by Nippon Coke and Engineering Co., Ltd.) as shown in Table 5. (Example 43) Various powder components having the same composition as in Reference Example 14 were weighed out and mixed into a 9 L Henschel mixer (FM10, manufactured by Nippon Coke and Engineering Co., Ltd.) after preliminary stirring. 390 g of the composition of Example 9 was then added and mixed. 78.8 g of the calcium chloride aqueous solution shown in Table 5 was then added and mixed to obtain a powder composition. After preparation, a portion of the powder was filled into a glass container, further placed in an aluminum pouch, sealed, and stored until use in testing. Reference Example 14 2.5 kg of titanium oxide coated with disodium stearoyl glutamate and aluminum hydroxide, 62.5 g of red iron oxide, 406.0 g of yellow iron oxide, and 31.3 g of black iron oxide were weighed out and charged into a 9 L Henschel mixer (FM10, manufactured by Nippon Coke and Engineering Co., Ltd.) and mixed, to obtain a mixed powder of disodium stearoyl glutamate and aluminum hydroxide-coated powder.

[0151]

[0152] (Evaluation test of antiseptic effect) A preservative effectiveness test was conducted in accordance with the "Preservative Effectiveness Test Method of the 18th Revised Japanese Pharmacopoeia (JP18)." 1. Test bacterial strains Ec; Escherichia coli (E. coli) NBRC 3972 Pa; Pseudomonas aeruginosa (Pseudomonas aeruginosa) NBRC 13275 Sa; Staphylococcus aureus (Staphylococcus aureus) NBRC 13276 Ca; Candida albicans (Candida) NBRC 1594 Ab; Aspergillus brasiliensis (Aspergillus niger) NBRC 9455 2. Preparation of test bacterial solution (1) Bacteria: Ec, Pa, Sa were pre-cultured on SCD agar medium at 32.5°C for 20 hours. The pre-cultured bacteria were scraped with a platinum loop and suspended in sterilized physiological saline, and approximately 10 8The test bacterial solution was prepared by adjusting the concentration to 1000 / mL. (2) Candida: The bacteria were pre-cultured on Ca Sabouraud glucose agar medium at 22.5°C for 48 hours. The pre-cultured bacteria were scraped with a platinum loop and suspended in sterilized physiological saline. 8 The test bacterial solution was prepared by adjusting the concentration to 1000 / mL. (3) Aspergillus niger: Ab: Pre-cultured on Sabouraud glucose agar medium at 22.5°C for 6 to 10 days. The pre-cultured bacteria were scraped with a platinum loop and suspended in sterilized physiological saline containing 0.05% by mass of polysorbate 80. 7 The test bacterial solution was prepared by adjusting the concentration to cells / mL. 3. Inoculation and storage of bacteria 0.5 mL of the test bacterial solution was added to 2 g of the powder composition and premixed. Separately, 19.25 g of the same powder composition was placed in a sterile vial, and 0.75 g of the previously premixed bacterial solution was inoculated and thoroughly mixed. Each was stored at 22.5°C, and the viable bacterial count was measured on the 7th, 14th, 21st, and 28th days. 4. Evaluation The viable bacterial count was measured by the pour plate method using the following media. Bacteria: SCDLP agar medium Fungi: GPLP agar medium

[0153]

[0154] For all compositions, Escherichia coli and Pseudomonas aeruginosa were killed by the 7th day. Table 6 shows the results for three bacterial species other than Escherichia coli and Pseudomonas aeruginosa. Example 43 showed excellent preservative efficacy, with all bacteria, including Staphylococcus aureus, yeast, and mold being killed or nearly killed by the 28th day, even when water was applied and the composition was not dried. On the other hand, Reference Examples 13 and 14 showed poor preservative efficacy, even when water was not used or the composition was dried, and maintained a high viable cell count, especially against mold, even on the 28th day.

[0155] Test Example 7: Evaluation of the antiseptic effect of powder compositions against mold. Each of the untreated powder components listed in Table 7 was weighed and stirred in a 75 mL mill and mixer (TML162, manufactured by Tescom Co., Ltd.). Surface treatment composition A or its comparative composition (not used in Reference Examples 16 and 17, and water used in Reference Example 19) was then added and mixed. Surface treatment composition B or its comparative composition (not used in Reference Example 15, and water used in Reference Example 18) listed in Table 7 was then added and mixed to obtain each powder composition. The powders were filled into glass containers immediately after preparation, sealed in aluminum pouches, and stored until testing. A test similar to the test for evaluating the antiseptic effect of Test Example 6 was performed on Aspergillus niger, and the viable cell count of the test specimens was measured. The viable cell count results were evaluated based on the criteria for water-insoluble preparations in the preservative effectiveness test method of the 18th edition of the Japanese Pharmacopoeia (JP18), as follows: ∘: good; Δ: not good, but no practical problems. The results are shown in Table 7.

[0156]

[0157] In Comparative Example 16, a high viable cell count was maintained even after 28 days, indicating poor antiseptic effect against mold. Furthermore, while surface treatment compositions A or B alone maintained a high viable cell count after 28 days even at high dosages, powders to which both surface treatment compositions A and B were applied (Examples 44 to 46) exhibited good antifungal effect, and a synergistic effect was observed when the compositions were combined (Table 8 and Figure 1).

[0158]

[0159] Test Example 8 Preparation of Gel Compositions of Surface Treatment Compositions A and B and Evaluation of Their Physical Properties (Preparation of Compositions) Surface treatment composition A and its comparative composition shown in Table 9 were prepared in the same manner as in Test Example 1 (Preparation of Compositions), and the masses shown in Table 10 were weighed into glass vials. Next, surface treatment composition B was added in the mass shown in Table 10, and the mixture was stirred to obtain a gel composition. (Application of Gel Composition and Measurement of Average Dynamic Friction Coefficient) The gel composition was applied to a glass vial at a concentration of 8.0 mg / cm using a Tribomaster (manufactured by Trinity Labs, product name: TL201Ts) under constant temperature and humidity conditions (23°C, 40% relative humidity (RH)). 2The gel composition was applied to artificial leather (Idemitsu Technofine Co., Ltd., approximately 2 mm thick) with a 1000 kJ / kg sample. After the mass change reached equilibrium, the average dynamic friction coefficient was measured. The conditions were a load of 50 gf, a test table movement speed of 25 mm / sec, and a measurement distance of 25 mm. A tactile contactor (Trinity Labs, finger model, fingerprint type) was used as the sensor. (Measurement of Water Retention Amount of Gel Composition) The gel composition listed in Table 10 was left to stand at constant temperature and humidity (23°C, 40% relative humidity (RH)) for one day or more. The water content when the mass change reached equilibrium was measured using a Karl Fischer moisture meter. The water content at constant temperature and humidity relative to the initial water content of the gel composition was calculated as the water retention (%) of the gel composition (a powder treatment agent comprising a mixture of surface treatment composition A and surface treatment composition B). The water content at constant temperature and humidity relative to the total mass of compounds (a) and (b) contained in the composition was also calculated, and this was defined as the water retention relative to the total mass of compounds (a) and (b).

[0160]

[0161]

[0162] In Reference Examples 19 to 23, which used the surface treatment compositions of Examples 47 and 48 containing (c) a polyhydric alcohol, smooth gels were formed, and as shown in Table 10, the measured average dynamic friction coefficients were 3.3 to 4.4. On the other hand, in Reference Examples 24 and 25, which used Comparative Example 17, which did not contain (c) a polyhydric alcohol, gels with a strong squeaky feel were obtained, and the average dynamic friction coefficients were low, at 0.6 or less. The compositions of Reference Examples 24 and 25 were confirmed to be in the form of white powder rather than gel at the time of measurement. Furthermore, while Reference Examples 19 to 23 had water retention amounts of 15 to 23%, Reference Examples 24 and 25 showed low values ​​of 7% or less. Additionally, in terms of water retention relative to the total mass of compounds (a) and (b), Reference Examples 19 to 23, which contained (c) a polyhydric alcohol, showed higher values ​​than Reference Examples 24 and 25.

[0163] Test Example 9: Measurement of water retention capacity of powder compositions (Preparation of powder compositions) Treated powder compositions of Examples and Comparative Examples listed in Table 11 were obtained in the same manner as in the preparation of the powder composition of Test Example 3. That is, the various untreated powder components listed in Table 11 were weighed and stirred in a 75 mL mill and mixer (TML162, manufactured by Tescom Co., Ltd.), and then surface treatment composition A or its comparative composition was added and mixed. Thereafter, surface treatment composition B listed in Table 11 was added and mixed to obtain each powder composition.

[0164] (Measurement of Water Retention Amount of Powder Composition) In the same manner as in the measurement of water retention amount in Test Example 8, the powder compositions of Examples 49 and 50 listed in Table 11, Comparative Example 18, Example 13 listed in Table 3-1, and Reference Example 14 listed in Table 5 were allowed to stand at constant temperature and humidity (23°C, 40% relative humidity (RH)) for one day or more, and the water amounts when the mass changes reached equilibrium were measured using a Karl Fischer moisture meter, and this was taken as the water retention amounts of the powder compositions.

[0165]

[0166] The water retention capacity of the powder composition was 2.1% or more in the powder treatment compositions of Examples 49 and 50, in which the surface treatment composition A used contained (c) a polyhydric alcohol, while Comparative Example 18, which did not contain (c) a polyhydric alcohol, showed a low value of 0.6% or less. Furthermore, Reference Example 14 had a water retention capacity of 0.4%, and Example 13 had a water retention capacity of 2.2%, showing that the Examples showed high water retention capacities.

[0167] Example 51 (Formulation Example) A powder eye shadow was prepared using the ingredients listed in Table 12 as follows. After mixing component I listed in Table 12 in a mixer, surface treatment composition A listed in II was added and further mixed in a mixer. Next, surface treatment composition B listed in II was added and mixed, completing treatment I. To this mixture, component III was added and mixed, and then an oil binder IV was added and stirred. Separately, a pearl pigment listed in component V was mixed, and then surface treatment composition A and surface treatment composition B listed in component VI were added in that order and mixed for a short time to obtain a treated pearl pigment. This was then mixed with components I to IV, and then VII was added. The mixture was compressed in a press to obtain an eye shadow. The resulting eye shadow exhibited excellent color development and adhesion, was resistant to smudging over time, and had long-lasting cosmetic wear. It also had excellent moldability and exhibited excellent strength even with a small amount of binder. Furthermore, the powder had excellent fluidity and was easy to handle during production.

[0168]

[0169] <Test Example 1'> Preparation of compositions and storage stability test at low and high temperatures (Preparation of compositions) Compositions containing the components listed in Table 13 and compositions prepared by mixing and dissolving water at the concentrations listed in Table 13 were used for the following evaluations.

[0170] (Evaluation of solution state half a day after preparation) The obtained composition was left to stand at room temperature for half a day, and then the uniformity was visually evaluated based on the following evaluation criteria: (Evaluation criteria) D: Obvious precipitates or floating matter were observed C: Precipitates or floating matter were observed to a thin extent covering the bottom or the liquid surface B: Precipitates or floating matter were observed scattered on the bottom or the liquid surface A: Semi-transparent aqueous solution, no precipitates or floating matter were observed S: Transparent aqueous solution, no precipitates or floating matter were observed

[0171] (Long-term storage stability test at low temperatures) A ​​20 mL transparent glass bottle was filled with the composition, the bottle was capped, and the bottle was allowed to stand at −5° C. and 0° C. After storage for 1 month and 3 months, the state of solution in the storage cabinet was visually confirmed. The state of solution (uniformity (presence or absence of separation), presence or absence of precipitates or floating matter) was visually judged based on the following criteria. If the solution was cloudy or non-uniform, meeting criteria B or below, under the temperature conditions in the storage cabinet, the bottle was taken out at 25° C. and evaluated. (Evaluation criteria) D Overall cloudiness or clear precipitation occurs at the storage temperature, and the solution does not dissolve even after standing or stirring at 25°C for 3 hours, with heterogeneous and clear precipitation (cannot be used as a treatment agent) C Overall cloudiness or precipitation occurs at the storage temperature, and the solution remains heterogeneous even after standing at 25°C for 3 hours, and the solution cannot be used as a treatment agent, but the precipitate dissolves or disperses, making the solution translucent when stirred B Overall cloudiness occurs at the storage temperature, but after standing at 25°C for 3 hours it dissolves and becomes homogeneous, transparent or translucent A Overall slightly cloudy but is a fluid and homogeneous aqueous solution S A translucent and homogeneous aqueous solution even at the storage temperature, with no visible precipitates or floating matter SS A transparent aqueous solution even at the storage temperature, with no visible precipitates or floating matter

[0172] (Evaluation after long-term storage at 50°C) The compositions were filled into 20 mL transparent glass bottles, capped, and left to stand at 50°C. After storage for 3 months, the compositions were removed from the storage cabinet and the state of solution was evaluated visually. For compositions that were transparent and no precipitate or floating matter was observed, the compositions were left to stand at 25°C for 3 hours or more, and then the transmittance at 430 nm was measured and evaluated based on the following criteria. (Evaluation criteria) D: Precipitates or floating matter were observed C: Precipitates or floating matter were observed to a thin extent covering the bottom or the liquid surface B: Precipitates or floating matter were observed sparsely on the bottom or the liquid surface A: A translucent aqueous solution with no precipitates or floating matter observed S: A transparent aqueous solution with no precipitates or floating matter observed and a transmittance of 90% or more but less than 94% SS: A transparent aqueous solution with no precipitates or floating matter observed and a transmittance of 94% or more

[0173] (Evaluation of odor after long-term storage at 50°C) The samples from the above (Evaluation of odor after long-term storage at 50°C) were left to stand at 25°C for 3 hours or more, and then returned to room temperature, after which the odor of the composition was evaluated based on the following criteria: (Evaluation criteria) D: Strong unpleasant odor, significantly stronger than before storage C: Odor is detected B: Change in odor is observed but not significant A: Almost no change in odor is detected or the odor is barely noticeable S: Almost no change in odor is detected compared to before storage or the odor is barely noticeable

[0174]

[0175] The compositions of Comparative Examples 1' to 3' were inhomogeneously dissolved at low temperatures and could not be used as treatment agents. The composition of Reference Example 4' became cloudy at low temperatures and dissolved uniformly when returned to 25°C, but was poor in usability in low-temperature environments. On the other hand, the treatment compositions of the Examples were in a homogeneous solution even under low-temperature and high-temperature conditions, showed little coloration, and had excellent storage stability. Furthermore, no noticeable odor was observed in the compositions before and after storage at 50°C.

[0176] <Test Example 2'> The surface treatment agent of Example 2' was used in the following evaluations. (Preservative Effectiveness Test of Treatment Composition) A preservative effectiveness test was conducted in accordance with the "Preservative Effectiveness Test Method of the 18th Edition of the Japanese Pharmacopoeia (JP18)." 1. Test Bacterial Strains Ec; Escherichia coli (E. coli) NBRC 3972 Pa; Pseudomonas aeruginosa (Pseudomonas aeruginosa) NBRC 13275 Sa; Staphylococcus aureus (Staphylococcus aureus) NBRC 13276 Ca; Candida albicans (Candida) NBRC 1594 Ab; Aspergillus brasiliensis (Aspergillus niger) NBRC 9455 2. Preparation of Test Bacterial Solution (1) Bacteria: Ec, Pa, Sa were pre-cultured on SCD agar medium at 32.5°C for 20 hours. The pre-cultured bacteria were scraped off with a platinum loop and suspended in sterile physiological saline for about 10 minutes. 8The test bacterial solution was prepared by adjusting the concentration to 1000 / mL. (2) Candida: The bacteria were pre-cultured on Ca Sabouraud glucose agar medium at 22.5°C for 48 hours. The pre-cultured bacteria were scraped with a platinum loop and suspended in sterilized physiological saline. 8 The test bacterial solution was prepared by adjusting the concentration to 1000 / mL. (3) Aspergillus niger: Ab: Pre-cultured on Sabouraud glucose agar medium at 22.5°C for 6 to 10 days. The pre-cultured bacteria were scraped with a platinum loop and suspended in sterilized physiological saline containing 0.05% polysorbate 80. 7 The test bacterial solution was prepared by adjusting the concentration to 0.15 mL / mL. 3. Inoculation and storage of bacteria For each type of test bacteria, 20 g of each specimen was placed in a sterile vial, and 0.15 mL of the test bacterial solution was inoculated, and the number of inoculated bacteria was measured. Each was stored at 25°C, and the viable bacterial count was measured on the 7th, 14th, 21st, and 28th days. 4. Evaluation The viable bacterial count was measured by the pour plate method using the following media. Bacteria: SCDLP agar medium Fungi: GPLP agar medium

[0177]

[0178] The surface treatment agent of Example 2' exhibited high antiseptic efficacy against bacteria and fungi, with all species being killed within 7 days.

[0179] Test Example 3' Evaluation of physical properties and functionality of powder compositions (Preparation of powder compositions) After weighing and stirring the various untreated powder components shown in Table 15 into a 75 mL mill and mixer (TML162, manufactured by Tescom Co., Ltd.), surface treatment composition A or its comparative components were added and mixed. Thereafter, surface treatment composition B or its reference example composition shown in Table 15 was added and mixed to obtain each powder composition.

[0180] (Evaluation of powder hydrophobicity) 20 mg of the powder composition of each Example and Reference Example was added to 10 g of water, and the appeara...

Claims

1. A method for surface treatment of powder, comprising: (i) a step of treating the powder with treatment liquid A; and (ii) a step of treating the powder with treatment liquid B, wherein treatment liquid A contains (a) one or more compounds selected from N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof, (b) one or more compounds selected from fatty acids having a carbon chain length of C8 to C22 and salts thereof, (c) a polyhydric alcohol and / or (d) arginine, and (e) water, wherein the concentration of compound (a) in treatment liquid A is 5% by mass or more, and when treatment liquid A does not contain arginine, the mass ratio of compound (b) to compound (a) in treatment liquid A (compound (b) / compound (a)) is 0.13 or less, A method in which, when treatment liquid A does not contain a polyhydric alcohol, the mass ratio of compound (b) to compound (a) in treatment liquid A (compound (b) / compound (a)) is 0.25 or less, and treatment liquid B is an aqueous solution containing (f) metal ions, and the metal ions (f) include ions of an alkaline earth metal or zinc ions.

2. The method according to claim 1, wherein said metal ions (f) include ions of one or more metals selected from the group consisting of calcium, zinc and magnesium.

3. The method according to claim 1, wherein processing solution B is a weakly acidic, neutral or alkaline aqueous solution.

4. The method according to claim 1, wherein the molar ratio of the metal ion (f) in the treatment solution B to the compound (a) in the treatment solution A is 0.3 to 10.

5. The method according to claim 1, wherein the mass ratio of the powder to the treatment liquid A is 0.1 to 10,000.

6. The method according to claim 1, wherein the mass ratio of the powder to the treatment liquid B is 0.5 to 10,000.

7. The method according to claim 1, wherein treatment solution A does not contain (d) arginine, and the concentration of compound (b) in treatment solution A is 6% by mass or less.

8. The method according to claim 1, wherein treatment solution A contains (d) arginine, and the concentration of compound (b) in treatment solution A is 6% by mass or less.

9. The method according to claim 1, wherein the processing solution A contains (c) a polyhydric alcohol.

10. The method according to claim 1, wherein the mixture obtained by mixing processing solution A and processing solution B forms a gel composition.

11. The method according to claim 1, wherein the mixture obtained by mixing processing solution A and processing solution B has a dynamic friction coefficient of 0.7 or more.

12. The method according to claim 1, wherein the mixture obtained by mixing processing solution A and processing solution B has a water retention (%) of 8 to 50%.

13. A powder surface-treated by the method of claim 1.

14. A cosmetic composition containing the powder according to claim 13.

15. A powder treatment agent comprising treatment liquid A and treatment liquid B, wherein treatment liquid A comprises (a) one or more compounds selected from N-acylamino acids and salts thereof having an acyl group with a carbon chain length of C8 to C22, (b) one or more compounds selected from fatty acids and salts thereof having a carbon chain length of C8 to C22, (c) a polyhydric alcohol and / or (d) arginine, and (e) water, wherein the concentration of compound (a) in treatment liquid A is 5% by mass or more, and when treatment liquid A does not contain arginine, the mass ratio of compound (b) to compound (a) in treatment liquid A (compound (b) / compound (a)) is 0.13 or less, and when treatment liquid A does not contain a polyhydric alcohol, the mass ratio of compound (b) to compound (a) in treatment liquid A (compound (b) / compound (a)) is 0.25 or less, and treatment liquid B is (f) an aqueous solution containing metal ions, The treatment agent, wherein the metal ions (f) include alkaline earth metal ions or zinc ions.

16. The treatment agent according to claim 15, wherein the metal ions (f) include ions of one or more metals selected from the group consisting of calcium, zinc, and magnesium.

17. The processing agent according to claim 15, wherein processing solution B is a weakly acidic, neutral or alkaline aqueous solution.

18. The treating agent according to claim 15, wherein the molar ratio of the metal ion (f) in treating solution B to the compound (a) in treating solution A is 0.3 to 10.

19. The processing agent according to claim 15, which is used for processing at a mass ratio of powder to processing solution A of 0.1 to 10,000.

20. The processing agent according to claim 15, which is used in processing at a mass ratio of powder to processing solution B of 0.5 to 10,000.

21. The treatment agent according to claim 15, wherein treatment solution A does not contain (d) arginine, and the concentration of compound (b) in treatment solution A is 6 mass % or less.

22. The treatment agent according to claim 15, wherein treatment solution A contains (d) arginine, and the concentration of compound (b) in treatment solution A is 6% by mass or less.

23. The processing agent according to claim 15, wherein processing solution A contains (c) a polyhydric alcohol.

24. The processing agent according to claim 15, wherein the mixture obtained by mixing processing liquid A and processing liquid B forms a gel composition.

25. The processing agent according to claim 11, wherein the mixture obtained by mixing processing solution A and processing solution B has a dynamic friction coefficient of 0.7 or more.

26. The processing agent according to claim 15, wherein the mixture obtained by mixing processing solution A and processing solution B has a water retention capacity (%) of 8 to 50%.

27. Powder surface-treated with the treatment agent according to claim 15.

28. A cosmetic composition containing the powder according to claim 27.

29. A powder whose surface is coated with a composition containing: (a) one or more compounds selected from N-acylamino acids having an acyl group with a carbon chain length of C8 to C22 and salts thereof; (b) one or more compounds selected from fatty acids having a carbon chain length of C8 to C22 and salts thereof; (c) a polyhydric alcohol and / or (d) arginine; (e) water; and (f) a metal ion, wherein when the composition does not contain arginine, the mass ratio of compound (b) to compound (a) (compound (b) / compound (a)) is 0.13 or less; when the composition does not contain polyhydric alcohol, the mass ratio of compound (b) to compound (a) (compound (b) / compound (a)) is 0.25 or less; and the metal ion (f) comprises an alkaline earth metal ion or a zinc ion.

30. The powder of claim 29, wherein the composition is a gel composition.

31. The powder of any one of claims 13, 27 and 29, wherein the composition has a coefficient of dynamic friction of 0.7 or greater.

32. The powder of any one of claims 13, 27 and 29, wherein the moisture retention (%) of the composition is 8 to 50%.

33. The powder of any one of claims 13, 27 and 29, wherein the powder has a moisture retention (%) of 1 or more.

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