Surface-treated powder, and cosmetic in which the powder is blended

Abstract

To provide a cosmetic such as a makeup cosmetic, a sunscreen cosmetic or emulsion having excellent touch feeling when applied to skin and adhesiveness to skin and makeup durability.SOLUTION: Provided are surface-treated powder in which a surface of pigment powder is treated by a compound which is liquid or pasty at a normal temperature and has ester bond and / or hydroxyl group in a molecular structure, and a cosmetic such as a makeup cosmetic, a sunscreen cosmetic or emulsion having excellent touch feeling when applied to skin and adhesiveness to skin and makeup durability by blending the powder into the cosmetic.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a surface-treated powder suitable for incorporation into cosmetics such as makeup cosmetics such as foundations, sunscreen cosmetics, and emulsions, and to cosmetics containing the powder. [Background technology]

[0002] Conventionally, powders blended in makeup cosmetics such as foundations, eye shadows, eyebrow creams, and blushers, body cosmetics such as body powders and baby powders, and basic cosmetics such as milky lotions and creams have been surface-treated with various compounds coated on the surface of pigment powders for the purpose of improving the feel of the powder by, for example, improving adhesion to the skin, spreading, and imparting a moist feeling to the skin.

[0003] Many methods are known for treating the surface of pigment powders, and examples of such methods include surface treatment with silicone compounds such as methylhydrogenpolysiloxane and dimethylpolysiloxane (see, for example, Patent Document 1), surface treatment with fluorine compounds such as perfluoroalkylphosphate diethanolamine salts and fluorine-modified silane (see, for example, Patent Document 2), and surface treatment with sphingosine analogues (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 163973 / 1983 [Patent Document 2] JP 2001-2524 A [Patent Document 3] Japanese Patent Application Publication No. 8-143422

[0005] The powder treated with the silicone compound described in Patent Document 1 is provided with water repellency, and the powder treated with the fluorine compound described in Patent Document 2 is provided with water and oil repellency, which are excellent in that they prevent makeup from coming off and improve makeup durability. However, these powders have problems such as a dry feel and poor moisturizing feeling, poor affinity with the body, poor adhesion to the skin, and because of their excellent water or water- and oil-repelling effect, they are not sufficiently washed off when cosmetics are washed off, and the cosmetics remain on the skin. In addition, the product described in Patent Document 3 can provide a moist feeling, but is not satisfactory in terms of adhesion to the skin, spreadability, and other tactile sensations. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the problems described above, and aims to provide a surface-treated powder that, when incorporated into cosmetics, provides excellent feel when applied to the skin (combining a moist feeling and good spreadability) and excellent adhesion to the skin, and also to provide a cosmetic containing the powder. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the inventors have conducted extensive research and have discovered that by surface-treating a pigment powder with a compound that is liquid or pasty at room temperature and has an ester bond and / or a hydroxyl group in its molecular structure, a cosmetic containing this surface-treated powder feels smooth to the touch when applied to the skin, spreads well, is moist, has good adhesion, and has excellent water repellency, thereby completing the present invention.

[0008] The cosmetic according to the present invention is characterized in that it contains the surface-treated powder according to the present invention. Effect of the Invention

[0009] According to the present invention, it is possible to provide a surface-treated powder which is excellent in water repellency, feels smooth and spreads well when applied to the skin, is moist, and has good adhesion, and a cosmetic preparation containing this surface-treated powder. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Next, specific embodiments of the surface-treated powder according to the present invention and a cosmetic composition containing the powder will be described.

[0011] In the present invention, the compound which is liquid or pasty at room temperature and has an ester bond and / or a hydroxyl group in its molecular structure and which is used for surface treatment of the pigment powder is preferably at least one compound selected from the group consisting of higher fatty acids, higher alcohols, alkyl glyceryl ethers, fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, and polyoxyethylene hydrogenated castor oil. Among these, alkyl glyceryl ethers, sorbitan fatty acid esters, and polyoxyethylene hydrogenated castor oil are more preferred because they provide a moist feel when applied to the skin and have good adhesion.

[0012] Examples of the higher fatty acid that is the compound according to the present invention include isostearic acid, palmitoleic acid, oleic acid, linoleic acid, etc., which are liquid at room temperature. Among the higher fatty acids, isostearic acid is preferred, and in particular, by surface-treating with isostearic acid having a terminal methyl branched type isostearic acid as the main component represented by the following general formula (1), a cosmetic containing the surface-treated powder is particularly preferred because it has a smooth feel when applied to the skin, spreads well, is moist, has good adhesion, and has excellent water repellency. TIFF2024177980000001.tif24123

[0013] Examples of the higher alcohol which is the compound according to the present invention include lauryl alcohol, isostearyl alcohol, oleyl alcohol, hexyldecanol, and octyldodecanol, which are liquid or pasty at room temperature.

[0014] Examples of the alkyl glyceryl ether, which is the compound according to the present invention, include batyl isostearate, monooleyl glyceryl ether, and monoisostearyl glyceryl ether, which are liquid or pasty at room temperature.

[0015] The fatty acid ester, which is the compound according to the present invention, is an ester of a fatty acid and a higher alcohol, and is liquid at room temperature. Examples of the fatty acid ester include isononyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, tricyclodecane methyl isononanoate, coconut (caprylic acid / capric acid), hexyl laurate, methylheptyl laurate, caprylyl laurate, decyl laurate, isopropyl myristate, methylheptyl myristate, 2-hexyldecyl myristate, octyldodecyl myristate, isopalmitate, and the like. isopropyl, methylheptyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, ethyl isostearate, isopropyl isostearate, isobutyl isostearate, decyl isostearate, methylheptyl isostearate, 2-hexyldecyl isostearate, 2-ethylhexyl hydroxystearate, octyldodecyl oleate, oleyl oleate, octyldodecyl ricinoleate, octyl paramethoxycinnamate, alkyl benzoate, and jojoba oil.

[0016] The glycerin fatty acid ester, which is the compound according to the present invention, is an ester of glycerin and a fatty acid, and is a monoester oil such as glyceryl isostearate, which is liquid at room temperature; di(caprylic / capric)propanediol, neopentyl glycol diisononanoate, neopentyl glycol dicaprate, glyceryl diisostearate, polyglyceryl diisostearate, propanediol diisostearate, di(phytosteryl / octyldodecyl) lauroyl glutamate, diester oils such as di(cholesteryl / behenyl / octyldodecyl) lauroyl glutamate, di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate, and neopentyl glycol dioctanoate; triester oils such as trimethylolpropane triisostearate, glyceryl triisostearate, caprylic / capric triglyceride, glyceryl trioctanoate, olive oil, castor oil, avocado oil, and sunflower oil.

[0017] The polyglycerol fatty acid ester, which is the compound according to the present invention, is an ester of polyglycerol obtained by polymerizing glycerol and a fatty acid, and the degree of polymerization of glycerol is preferably 4 or less. If the degree of polymerization of glycerol exceeds 4, the hydrophilicity becomes high, and the water repellency of the surface-treated powder may not be obtained. Examples of the polyglycerol fatty acid ester include polyglyceryl-2 isostearate, polyglyceryl-2 oleate, polyglyceryl-2 triisostearate, and triglyceryl-2 tetraisostearate, which are liquid or paste-like at room temperature.

[0018] The sorbitan fatty acid ester, which is the above-mentioned compound according to the present invention, is an ester of sorbitan and a fatty acid, and examples thereof include sorbitan monoisostearate, sorbitan sesquiisostearate, sorbitan triisostearate, sorbitan monooleate, sorbitan sesquioleate, and sorbitan trioleate, which are liquid or pasty at room temperature.

[0019] The polyoxyethylene hydrogenated castor oil, which is the compound according to the present invention, is an etherified product of hydrogenated castor oil and a polyoxyethylene compound, and the number of moles of polyoxyethylene added is preferably 10 or less. If the number of moles of polyoxyethylene added exceeds 10, the hydrophilicity becomes high, and the water repellency of the surface-treated powder may not be obtained. Examples of the polyoxyethylene hydrogenated castor oil include PEG-5 hydrogenated castor oil and PEG-10 hydrogenated castor oil, which are paste-like at room temperature.

[0020] Examples of the cosmetic pigments that can be used in the present invention include inorganic powders, organic powders, surfactant metal salt powders (metal soaps), colored pigments, pearl pigments, and tar dyes.

[0021] Examples of inorganic powders include titanium oxide, zirconium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, mica, kaolin, sericite, muscovite, synthetic mica, phlogopite, lepidolite, biotite, lithia mica, silicic acid, silicic acid anhydride, aluminum silicate, magnesium silicate, aluminum magnesium silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate, hydroxyapatite, vermiculite, higilite, bentonite, montmorillonite, hectorite, zeolite, ceramic powder, secondary calcium phosphate, alumina, aluminum hydroxide, boron nitride, boron nitride, and silica.

[0022] Examples of organic powders include polyamide powder, polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethylbenzoguanamine powder, polytetrafluoroethylene powder, polymethyl methacrylate powder, cellulose, silk powder, nylon powder, nylon 12, nylon 6, acrylic powder, acrylic elastomer, styrene-acrylic acid copolymer, divinylbenzene-styrene copolymer, vinyl resin, urea resin, phenolic resin, fluororesin, silicone resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, microcrystalline fiber powder, starch powder, and lauroyl lysine.

[0023] Examples of surfactant metal salt powders (metal soaps) include zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, zinc myristate, magnesium myristate, zinc cetyl phosphate, calcium cetyl phosphate, and sodium zinc cetyl phosphate.

[0024] Examples of colored pigments include inorganic red pigments such as iron oxide, iron hydroxide, and iron titanate, inorganic brown pigments such as γ-iron oxide, inorganic yellow pigments such as yellow iron oxide and yellow ocher, inorganic black pigments such as black iron oxide and carbon black, inorganic purple pigments such as manganese violet and cobalt violet, inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide, and cobalt titanate, inorganic blue pigments such as iron blue and ultramarine, fine particle powders such as titanium oxide fine particle, cerium oxide fine particle, and zinc oxide fine particle, lakes of tar-based pigments, lakes of natural pigments, and synthetic resin powders obtained by combining these powders.

[0025] Examples of pearl pigments include titanium oxide-coated mica, bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, fish scale foil, and titanium oxide-coated colored mica; examples of metal powder pigments include powders selected from aluminum powder, copper powder, stainless steel powder, and the like.

[0026] Examples of tar dyes include Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 204, Yellow No. 401, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 404, Green No. 3, Green No. 201, Green No. 204, Green No. 205, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 206, and Orange No. 207; examples of natural dyes include pigments selected from carminic acid, laccaic acid, carthamine, brazilian, and crocin.

[0027] Next, a method for producing the surface-treated powder of the present invention will be described. In a surface treatment method for coating the surface of a pigment powder with a compound that is liquid or pasty at room temperature and has an ester bond and / or a hydroxyl group in its molecular structure, the pigment powder to be surface-treated is generally stirred in an appropriate mixer, and the compound is added dropwise as is, or isostearic acid is dissolved in an alcohol such as ethanol, isopropyl alcohol, isobutanol, etc., a hydrocarbon organic solvent such as toluene, n-hexane, cyclohexane, etc., or a polar organic solvent such as acetone, ethyl acetate, butyl acetate, etc., and this solution is added dropwise or by spraying and stirred, and the organic solvent is completely removed by evaporation, and then the mixture is heated and aged at 90°C or higher, and optionally pulverized to perform the surface treatment. When an organic solvent is used, isopropyl alcohol is particularly preferred as the solvent to be used, because the use of isopropyl alcohol makes it possible to make the surface treatment more uniform than the other solvents listed above, and therefore the effects of the present invention (improved feel during application and adhesion to the skin) are more significantly exhibited.

[0028] As a method for mixing and dispersing the pigment powder and the compound that is in a liquid or paste form at room temperature and has an ester bond and / or a hydroxyl group in its molecular structure, an appropriate method can be selected depending on the concentration and viscosity of the surface treatment agent solution. Suitable examples include a reaction tank with a stirring blade, a disperser, a Henschel mixer, a Loedige mixer, a kneader, a V-type mixer, and a roll mill. In addition, when pulverizing, a normal pulverizer such as a hammer mill, a ball mill, a sand mill, or a jet mill can be used. Any of these pulverizers can be used to obtain products of similar quality, so there is no particular limitation.

[0029] The amount of the compound used in the present invention, which is liquid or pasty at room temperature and has an ester bond and / or a hydroxyl group in its molecular structure, coated on the pigment powder is preferably 0.1 to 10% by mass, although this amount varies depending on the particle size of the pigment powder. If the amount is less than 0.1% by mass, the uniform adhesion to the skin and moist feeling may not be sufficient, and if it exceeds 10% by mass, the feeling may become heavy.

[0030] Next, the cosmetic according to the present invention will be described. The cosmetic according to the present invention is in the form of a liquid or paste at room temperature as described above, and is surface-treated with a compound having an ester bond and / or a hydroxyl group in its molecular structure. This provides a good feel when applied to the skin (both a moist feeling and good spreadability), good adhesion to the skin, and good water repellency. The cosmetic can be used in the form of skin care cosmetics such as milky lotion and lotion, makeup cosmetics such as foundation and lipstick, hair cosmetics, etc. The amount of the cosmetic is not particularly limited, but is preferably 0.1 to 95% by mass.

[0031] Furthermore, the cosmetic of the present invention may contain ingredients that are usually used in cosmetics, such as powders, surfactants, oils, gelling agents, polymers, cosmetic ingredients, moisturizers, pigments, preservatives, fragrances, etc., within the scope of not impairing the effects of the present invention.

[0032] The cosmetic composition of the present invention may be in any form, such as a powder, emulsion, cream, stick, solid, spray, or multi-layer separation type. EXAMPLES

[0033] Next, the present invention will be described more specifically based on examples and comparative examples of the surface-treated powder according to the present invention and cosmetics containing the powder, but the present invention is not limited to the following examples.

[0034] 20 g of the compound in Table 1 was mixed with 100 g of isopropyl alcohol and dissolved by heating at 50°C or higher to obtain a surface treatment solution. Next, 980 g of the pigment powder in Table 1 was charged into a Henschel mixer that had been preheated to 60°C. The surface treatment solution was poured into the Henschel mixer, uniformly dispersed, and the solvent was removed by evacuating the mixer. The surface-treated powder was removed from the mixer, heated at 90°C for 6 hours, crushed, and sieved to obtain the surface-treated powder shown in Table 1.

[0035] [Table 1] *1: RADIACID0909 (Oleon) *2: Isostearyl alcohol EX (manufactured by Koyu Alcohol Kogyo Co., Ltd.) *3: NIKKOL Selakyl Alcohol V (manufactured by Nikko Chemicals Co., Ltd.) *4: NIKKOL IOP (manufactured by Nikko Chemicals Co., Ltd.) *5: EIS-V (manufactured by Koyu Alcohol Kogyo Co., Ltd.) *6: NIKKOL Jojoba Oil S (manufactured by Nikko Chemicals Co., Ltd.) *7: TISG (manufactured by Kokyu Alcohol Kogyo Co., Ltd.) *8: NIKKOL Triesta F-810 (manufactured by Nikko Chemicals Co., Ltd.) *9: NIKKOL SI-15RV (manufactured by Nikko Chemicals Co., Ltd.) *10: NIKKOL SO-30V (manufactured by Nikko Chemicals Co., Ltd.) *11: NIKKOL HCO-5 (manufactured by Nikko Chemicals Co., Ltd.) *12: KF-9901 (Shin-Etsu Chemical Co., Ltd.) <Water repellency> Weigh out 0.2g of powder and press it in an IR tablet press at 100kgf / cm 2 The powder was compressed at a pressure of 1000 rpm for 5 minutes to produce pellets with a diameter of 1 cm. A drop of ion-exchanged water was dropped onto the surface of the pellets using a microsyringe, and the contact angle was measured three times 30 seconds after the drop to determine the water repellency of the powder. <Sensation> A sensory evaluation test was conducted on the feel of the product (ease of spreading, moisturizing sensation) using five female panelists. The test was conducted in the form of a questionnaire, with each item given a score between 0 and 5, with 0 being a poor evaluation and 5 being an excellent evaluation, and the results were expressed as the average score of all panelists.

[0036] A comparison between the Examples and Comparative Examples shown in Table 1 shows that the pigment powder of the present invention, which is surface-treated with a compound that is liquid or pasty at room temperature and has an ester bond and / or a hydroxyl group in its molecular structure, has high water repellency and a good feel when used (good spreadability and moist feel). This is because, in the surface-treated powder of the present invention, the compound that is liquid or pasty at room temperature adheres efficiently to the pigment powder and is uniformly applied to the pigment powder surface. However, if the amount of coating of the compound exceeds 10% by mass, the feel becomes heavy, so 10% by mass or less is preferable.

[0037] Example 12 <Production of powder foundation> A powder foundation was produced according to the formulation in Table 2 and the production method described below. Note that the units in Table 2 are % by mass.

[0038] [Table 2] Note 1: KSP-100 (Shin-Etsu Chemical Co., Ltd.)

[0039] <Manufacturing method> While thoroughly mixing component A using a mixer, component B which had been uniformly heated and dissolved was gradually added and further mixed, then the mixture was pulverized, passed through a mesh, and stamped into a metal plate using a die to obtain the product.

[0040] Example 13 A powder foundation was obtained in the same manner as in Example 12, except that component (1) in Example 12 was replaced with component (3) of Example 3, and components (2) to (6) were replaced with surface-treated powders obtained in the same manner as in Example 3.

[0041] Example 14 A powder foundation was obtained in the same manner as in Example 12, except that component (1) in Example 12 was replaced with component of Example 9, and components (2) to (6) were replaced with surface-treated powder obtained in the same manner as in Example 9.

[0042] Example 15 A powder foundation was obtained in the same manner as in Example 12, except that component (1) in Example 12 was replaced with that of Example 11, and (2) to (6) were replaced with surface-treated powder obtained in the same manner as in Example 11.

[0043] Comparative Example 3 A powder foundation was obtained in the same manner as in Example 12, except that component (1) in Example 12 was replaced with Comparative Example 1, and components (2) to (6) were replaced with surface-treated powder obtained in the same manner as in Comparative Example 1.

[0044] Comparative Example 4 A powder foundation was obtained in the same manner as in Example 12, except that component (1) in Example 12 was replaced with Comparative Example 2, and components (2) to (6) were replaced with surface-treated powder obtained in the same manner as in Comparative Example 2.

[0045] Table 3 shows the results of evaluating Examples 12 to 15 and Comparative Examples 3 and 4 using the same method as for evaluating the feel of the surface-treated powder examples described above.

[0046] [Table 3]

[0047] A comparison of the Examples and Comparative Examples shown in Table 3 shows that the cosmetics of the present invention using pigment powder that is liquid or pasty at room temperature and has been surface-treated with a compound having an ester bond and / or a hydroxyl group in its molecular structure have a better feel when used (both good spreadability and moist feel) than the Comparative Examples.

Claims

1. A surface-treated powder in which the surface of a pigment powder is treated with a compound which is in a liquid or paste form at room temperature and has an ester bond and / or a hydroxyl group in its molecular structure.

2. 2. The surface-treated powder according to claim 1, characterized in that the compound is at least one compound selected from the group consisting of higher fatty acids, higher alcohols, alkyl glyceryl ethers, fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, and polyoxyethylene hydrogenated castor oil.

3. A cosmetic comprising the surface-treated powder according to claim 1 or 2.

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