Powder cosmetic

Abstract

The purpose of the present invention is to provide a powder cosmetic which is suppressed in makeup removal and has good makeup holding properties. A powder cosmetic containing (A) an inorganic powder having an average particle diameter of 20 [mu] m or less and (B) an amphoteric surfactant.

Description

Technical Field The present invention relates to powder cosmetics, and more particularly to solid cosmetics that have good makeup lasting properties, little sebum damage, and are suitable for foundation and the like. Background Art Powder cosmetics are a common cosmetic base in color cosmetics such as foundation and eye shadow. Generally, powder cosmetics are composed of powder as the main component and oil as its binder or adhesive. However, conventional powder cosmetics sometimes liquefy due to sebum, sweat, etc., and sometimes easily come off. In response to such issues, improvement technologies such as increasing the oil content in powder cosmetics have also been studied, but when there is too much oil, the feeling of use sometimes becomes insufficient, and new technologies that can suppress makeup coming off are required. Summary of the invention The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a powder cosmetic having excellent long-lasting makeup performance. According to the present invention, the following inventions are provided.

[0001] A powder cosmetic, characterized in that it contains (A) an inorganic powder having an average particle size of 20 μm or less and (B) an amphoteric surfactant.

[0002] The powder cosmetic according to [1], wherein the component (A) contains an inorganic powder having an average particle size of 200 nm or less.

[0003] The powder cosmetic according to [1] or [2], wherein the component (A) contains fine-particle zinc oxide.

[0004] The cosmetic according to [3], wherein the content of the fine-particle zinc oxide is 1 to 10% by mass based on the total mass of the component (A).

[0005] The cosmetic according to any one of [1] to [4], wherein the component (B) is selected from the group consisting of alkyl betaine-type surfactants, alkyl amide betaine-type surfactants, imidazoline-type surfactants, amine oxide-type surfactants, amino acid-type surfactants, sulfobetaine-type surfactants and lecithin-type surfactants.

[0006] The cosmetic according to any one of [1] to [5], wherein the component (B) is an alkyl betaine-type surfactant or an imidazoline-type surfactant.

[0007] The cosmetic according to any one of [1] to [6], further comprising (C) an oil component.

[0008] The cosmetic according to any one of [1] to [7], further comprising (D) an organic powder.

[0009] The cosmetic according to any one of [1] to [8], wherein Based on the total mass of the aforementioned cosmetics, The content of component (A) is 30 to 90% by mass, The content of the component (B) is 0.1 to 10% by mass. The content of the component (C) is 5 to 20% by mass, and The content of the component (D) is 5 to 30% by mass.

[0010] The cosmetic according to any one of [1] to [9], which is a powder solid cosmetic. Effects of the Invention According to the present invention, a powder cosmetic is provided which does not impair the basic characteristics of a powder cosmetic and has little makeup removal and excellent long-lasting makeup performance. DETAILED DESCRIPTION [Powder cosmetics] The powder cosmetic of the present invention contains (A) an inorganic powder and (B) an amphoteric surfactant as essential ingredients, and has excellent makeup lasting performance. The present inventors conducted research on improving the makeup lasting performance of powder cosmetics and found that the following specific properties were found: when a mixture of an inorganic powder and an amphoteric surfactant that is generally used in cleaning agents, etc. but is not considered to be used in combination with powder cosmetics, gelation occurs when the mixture is brought into contact with sebum. Therefore, it is believed that a powder cosmetic containing an inorganic powder and an amphoteric surfactant is less likely to be damaged by sebum when applied to the skin, and the makeup lasting performance is improved, thereby completing the present invention. Hereinafter, essential components to be formulated in the powder cosmetic of the present invention and additional components that can be used as needed will be described. (A) Inorganic powder The powder cosmetic of the present invention contains an inorganic powder (hereinafter, for simplicity, sometimes referred to as component (A)). In the present invention, the inorganic powder refers to an inorganic powder having an average particle size of 20 μm or less. Such an inorganic powder has different functions when the particle size is small and when the particle size is large. For example, particles with an average particle size of 200 nm or less have a large effect of improving usability, and particles with an average particle size larger than that have the characteristics of being able to strongly function as a colorant. Inorganic powders with an average particle size of 200 nm or less can be selected from inorganic powders used in general cosmetics. Examples of such inorganic powders include fine-particle zinc oxide, talc, kaolin, silk mica (sericite), muscovite, phlogopite, synthetic mica, synthetic phlogopite iron, synthetic fluorphlogopite, red mica, biotite, calcined talc, calcined sericite, calcined muscovite, calcined phlogopite, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, alumina, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, metal soap (e.g. zinc myristate, calcium palmitate, aluminum stearate, etc.), photochromic titanium oxide (titanium dioxide formed by sintering iron oxide), reduced zinc white, etc. These inorganic powders may be those subjected to a hydrophobic treatment on the surface, or those subjected to a surface treatment with silicone, metal soap or the like. In the present invention, it is preferred to combine one or more inorganic powders. Inorganic particles having an average particle size of 200 nm or less, particularly fine-particle zinc oxide, have a large makeup removal inhibitory effect among inorganic powders, so the inorganic powder preferably contains fine-particle zinc oxide. Microparticle zinc oxide refers to zinc oxide commonly used in external-use compositions such as cosmetics, with an average particle size of less than 0.1 μm (the lower limit of the average particle size is not particularly limited, and is generally about 30 nm). Such microparticle zinc oxide can be manufactured by conventional methods such as the French method and the American method, or commercial products can be used. As commercially available microparticle zinc oxide, for example, FINEX-25, FINEX-50, FINEX-75 (manufactured by Sakai Chemical Industry Co., Ltd.), ZnO350 (manufactured by Sumitomo Osaka Cement Co., Ltd.), ZINCOX SUPER-10, ZINCOX SUPER-20R, ZINCOX SUPER-30, ZINCOX CP-1 (manufactured by Shiraishi Chemical Industry Co., Ltd.), Z-COTE (manufactured by Sun Smart Co., Ltd.), MZ-500, MZ-700 (manufactured by TAYCA CORPORATION), etc. can be cited. In addition, the component (A) may contain an inorganic powder having an average particle size of more than 200 nm and less than 20 μm. Examples of such inorganic powders include inorganic powder pigments. Specifically, examples include Inorganic white pigments (such as titanium dioxide, zinc oxide, etc.); Inorganic red pigments (such as iron oxide (red iron oxide), iron titanate, etc.); Inorganic brown pigments (such as γ-iron oxide, etc.); Inorganic yellow pigments (such as yellow iron oxide, yellow ochre, etc.); Inorganic black pigments (such as black iron oxide, low-valent titanium oxide, etc.); Inorganic violet pigments (such as manganese violet, cobalt violet, etc.); Inorganic green pigments (such as chromium oxide, chromium hydroxide, cobalt titanate, etc.); Inorganic blue pigments (such as ultramarine, Prussian blue, etc.); Pearlescent pigments (for example, bismuth oxychloride, fish scale foil, mica titanium, iron oxide coated mica titanium, low-valent titanium oxide coated mica titanium, mica titanium with photochromic properties, pearlescent pigments using talc, glass, synthetic fluorphlogopite, silica, bismuth oxychloride, etc. instead of mica as a substrate, pearlescent pigments coated with low-valent titanium oxide, colored titanium oxide, iron oxide, aluminum oxide, silica, zirconium oxide, zinc oxide, cobalt oxide, aluminum, etc. in addition to titanium oxide as a coating, and functional pearlescent pigments Pigments: Pearlescent pigments formed by coating resin particles on the surface of pearlescent pigments (Japanese Patent Application No. 11-92688), pearlescent pigments formed by coating aluminum hydroxide particles on the surface of pearlescent pigments (Japanese Patent Application No. 2002-146238), pearlescent pigments formed by coating zinc oxide particles on the surface of pearlescent pigments (Japanese Patent Application No. 2003-261421), pearlescent pigments formed by coating barium sulfate particles on the surface of pearlescent pigments (Japanese Patent Application No. 2003-61229), etc.); Metal powder pigments (such as aluminum powder, copper powder, etc.); organic pigments such as zirconium, barium or aluminum lakes (such as Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401 and Blue No. 404, Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3 and Blue No. 1, etc.); etc. In the powder cosmetic of the present invention, the content of component (A) is not particularly limited, but is preferably 30 to 90% by mass, more preferably 40 to 80% by mass, based on the total mass of the powder cosmetic. By containing component (A) at such a content, the covering power and smoothness when the powder cosmetic is applied to the skin can be sufficient. In addition, when the cosmetic of the present invention contains microparticle zinc oxide, the content of microparticle zinc oxide is preferably 1 to 10% by mass, more preferably 2 to 8% by mass, based on the total mass of component (A). As described above, microparticle zinc oxide improves the effect of suppressing makeup removal, but it is not necessary that all of component (A) is microparticle zinc oxide. By making the content within this range, the effect of suppressing makeup removal can be fully exerted when in contact with sebum. On the other hand, by combining with other inorganic powders, the feeling of use of powder cosmetics, the covering property required by powder cosmetics, etc. can be improved. (B) Amphoteric Surfactants The powder cosmetic of the present invention contains an amphoteric surfactant (hereinafter, sometimes referred to as component (B) for simplicity). Amphoteric surfactants are surfactants having both an acidic group and a basic group, and can be arbitrarily selected from amphoteric surfactants generally used in cosmetics. However, in order to more strongly exhibit the sebum damage inhibitory effect, the component (B) is more preferably selected from the group consisting of (B1) alkyl betaine type surfactants, (B2) alkyl amide betaine type surfactants, (B3) imidazoline type surfactants, (B4) amine oxide type surfactants, (B5) amino acid type surfactants, (B6) sulfobetaine type surfactants, and (B7) lecithin type surfactants. (B1) The alkyl betaine type surfactant can be represented by the following general formula (b1). In the formula, R 1 is an aliphatic hydrocarbon group, such as C8~C 18 A saturated or unsaturated aliphatic hydrocarbon group. Specific examples of such alkyl betaine-based surfactants include Lauryl dimethylaminoacetic acid betaine (sometimes also called lauryl betaine), and Coconut oil alkyl dimethylaminoacetic acid betaine (sometimes also called coconut oil alkyl betaine, coconut oil betaine), etc. (B2) The alkylamide betaine type surfactant can be represented by the following general formula (b2). In the formula, R 2 is an aliphatic hydrocarbon group, such as C8~C 18 A saturated or unsaturated aliphatic hydrocarbon group. Specific examples of such alkylamide betaine surfactants include: Lauramidopropyl dimethylaminoacetic acid betaine (sometimes also called lauramidopropyl betaine, lauramidopropyl), Cocoamidopropyl dimethylaminoacetic acid betaine (sometimes also called cocamidopropyl betaine, cocamidopropyl betaine), and Palm kernel oleamidopropyl dimethylaminoacetic acid betaine (sometimes also called palm kernel oleamidopropyl betaine), and the like. (B3) The imidazoline type surfactant can be represented by the following general formula (b3). In the formula, R 3 is an aliphatic hydrocarbon group, such as C8~C 18 A saturated or unsaturated aliphatic hydrocarbon group; n3 is a number of 1 or 2. Specific examples of such imidazoline-type surfactants include: Sodium N-lauroyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine (sometimes also called N-lauroyl-N'-carboxymethyl-N'-hydroxyethylimidazolinium betaine, sodium lauroamphoacetate), Sodium N-coconut oil fatty acid acyl-N'-carboxymethyl-N'-hydroxyethyl ethylenediamine (sometimes also called N-coconut oil fatty acid acyl-N'-carboxymethyl-N'-hydroxyethyl imidazolinium betaine, sodium cocoamphoacetate), Sodium N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethyl ethylenediamine (sometimes also referred to as N-coconut oil fatty acid acyl-N'-carboxyethyl-N'-hydroxyethyl imidazolinium betaine, sodium cocoamphopropionate) and the like. (B4) The amine oxide type surfactant can be represented by the following general formula (b4). In the formula, R 4 is an aliphatic hydrocarbon group, such as C8~C 18 A saturated or unsaturated aliphatic hydrocarbon group; L 4 It is a single bond or an amide alkylene chain such as -C(=O)-NH-(CH2)3-. Specific examples of such amine oxide surfactants include: Lauryl dimethylamine oxide (sometimes also called lauramine oxide), Coconut alkyl dimethyl amine oxide (sometimes also called cocamine oxide), and Lauramidopropyl dimethylamine oxide (sometimes also referred to as lauramidopropylamine oxide), and the like. (B5) The amino acid type surfactant can be represented by the following general formula (b5). In the formula, R 5is an aliphatic hydrocarbon group, such as C8~C 18 A saturated or unsaturated aliphatic hydrocarbon group; A 5 is hydrogen, carboxyl or carboxyl-substituted alkyl; n5 is an integer of 1 or 2. Specific examples of such amine oxide surfactants include: Monosodium lauryl aminodiacetate, Disodium lauryl aminodiacetate (sometimes also called disodium lauryl iminodiacetate), Sodium lauryl aminopropionate (sometimes also called sodium lauryl aminopropionate), and Sodium Coconut Alkyl Alanine (sometimes also called Sodium Cocoyl Alanine), etc. (B6) The sulfobetaine surfactant can be represented by the following general formula (b6). In the formula, R 6 is an aliphatic hydrocarbon group, such as C8~C 18 A saturated or unsaturated aliphatic hydrocarbon group; L 6 It is a single bond or an amide alkylene chain such as -C(=O)-NH-(CH2)3-. Specific examples of such sulfobetaine surfactants include: Lauramidopropyl dimethylaminohydroxysulfonate (sometimes also referred to as lauramidopropyl hydroxysulfonate, lauramidopropyl hydroxysulfonate), and the like. (B7) The lecithin-based surfactant can be represented by the following general formula (b7). R 7 Each independently is an aliphatic hydrocarbon group, such as C8~C 18 A saturated or unsaturated aliphatic hydrocarbon group. Specific examples of such lecithin-based surfactants include Hydrogenated soy lecithin (sometimes also called hydrogenated lecithin), etc. The component (B) can be arbitrarily selected according to the purpose, but is preferably an alkyl betaine type surfactant such as lauryl betaine or an imidazoline type surfactant such as sodium cocoamphoacetate, because these have a relatively large effect of improving makeup removal. In addition, these components (B) have an aliphatic hydrocarbon group as a hydrophobic group, and in order for the hydrocarbon group to effectively interact with sebum, the carbon number is preferably 8 to 18, and more preferably 12 to 18. In the powder cosmetic of the present invention, the content of component (B) is not particularly limited, but is preferably 0.1 to 10% by mass, more preferably 0.5 to 7% by mass, based on the total mass of the powder cosmetic. By containing component (B) at such a content, the covering power and smoothness when the powder cosmetic is applied to the skin can be sufficient. (C) Oil The powder cosmetic of the present invention may contain oil. In general, powder cosmetics use oil to impart adhesion to the skin, but in the present invention, component (B) is used instead of oil, so oil is not essential. However, oil having functions such as a binder for making the powder cosmetic solid, an ultraviolet absorber for preventing ultraviolet rays, etc. may be added. In addition, oil may be added to supplement the adhesion to the skin. The oil component is not particularly limited as long as it can be used for general cosmetics, and examples thereof include liquid oils, solid oils, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, synthetic ester oils, silicone oils and the like. In the following description, POE is an abbreviation for polyoxyethylene, POP is an abbreviation for polyoxypropylene, and the number in parentheses after POE or POP represents the average number of added moles of POE groups or POP groups in the compound. Examples of the liquid oil include avocado oil, camellia oil, turtle oil, macadamia seed oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame seed oil, peach kernel oil, wheat germ oil, camellia oil, castor seed oil, linseed oil, safflower seed oil, cottonseed oil, perilla seed oil, soybean oil, peanut oil, tea seed oil, torreya seed oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba seed oil, germ oil, and triglycerol. Examples of the solid fats and oils include cocoa seed butter, coconut oil, horse fat, hydrogenated coconut oil, palm oil, beef tallow, sheep tallow, hydrogenated beef tallow, palm kernel oil, lard, beef bone fat, sumac kernel oil, hydrogenated oil, beef saddle fat, sumac wax, and hydrogenated castor seed oil. Examples of the waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, worm wax, spermaceti wax, montan wax, rice bran wax, lanolin, kapok wax, acetylated lanolin, lanolin oil, sugarcane wax, isopropyl lanolin acid, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin acid polyethylene glycol ester, and POE hydrogenated lanolin alcohol ether. Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, and microcrystalline wax. Examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tall oil acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). Examples of higher alcohols include straight-chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetearyl alcohol, etc.); branched-chain alcohols (e.g., monostearyl glyceryl ether (baty alcohol), 2-decyltetradecynyl alcohol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.); and the like. Examples of the synthetic ester oil include isopropyl myristate, cetyl ethylhexanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate, acetylated lanolin, isocetyl stearate, isocetyl isostearate, cholesterol 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, diisostearyl malate, di-2-heptyl undecanoate glyceryl, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, tetra-2-ethylhexanoic acid pentaerythritol fatty acid ester, Tetraethanol esters, tri-2-ethylhexanoin, tricaprylin, triisopalmitin, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, trimyristin, tri-2-heptylundecanoic acid glyceryl, castor oil fatty acid methyl ester, oleyl oleate, acetylated glyceride, 2-heptylundecyl palmitate, diisobutyl adipate, 2-octyldodecyl N-lauroyl-L-glutamate, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristic acid, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, etc. Examples of the silicone oil include dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, stearoxymethylpolysiloxane, polyether-modified organopolysiloxane, fluoroalkyl-polyoxyalkylene co-modified organopolysiloxane, alkyl-modified organopolysiloxane, terminal-modified organopolysiloxane, fluorine-modified organopolysiloxane, amino-modified organopolysiloxane, silicone gel, acrylic silicone, trimethylsiloxysilicic acid, silicone RTV rubber and other silicone compounds. As the ultraviolet light shielding agent (ultraviolet light absorber and / or ultraviolet light scatterer), those generally formulated in cosmetics can be used. The ultraviolet absorber is not particularly limited, and a wide range of ultraviolet absorbers commonly used in cosmetics can be listed. Examples thereof include benzoic acid ultraviolet absorbers (e.g., para-aminobenzoic acid (hereinafter referred to as PABA), PABA monoglyceride, N,N-dipropoxy PABA ethyl ester, N,N-diethoxy PABA ethyl ester, N,N-dimethyl PABA ethyl ester, N,N-dimethyl PABA butyl ester, N,N-dimethyl PABA ethyl ester, etc.); anthranilic acid ultraviolet absorbers (e.g., homomenthyl-N-acetyl anthranilate, etc.); salicylic acid ultraviolet absorbers (e.g., amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropylphenyl salicylate, etc.); cinnamic acid ultraviolet absorbers (e.g., Such as octyl methoxycinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isopentyl-p-methoxycinnamate, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β-phenyl cinnamate, 2-ethylhexyl-α-cyano-β-phenyl cinnamate, glyceryl mono-2-ethylhexanoyl-di-p-methoxycinnamate, etc.; diphenyl Ketone-based ultraviolet absorbers (e.g., 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 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-octyloxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.); 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene -d,l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole; 2-(2'-hydroxy-5'-methylphenylbenzotriazole; dibenzylazine; dianisyl methane; 4-methoxy-4'-tert-butyl dibenzoyl methane; 5-(3,3-dimethyl-2-nitro-norbornene)-3-pentane-2-one, dimorpholinopyridazinone; 2-ethylhexyl-2-cyano-3,3-diphenylacrylate: 2,4-bis-{[4-(2-ethylhexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-(1,3,5)-triazine, etc. The ultraviolet scattering agent is not particularly limited, and specific examples thereof include fine-particle metal oxides such as zinc oxide, titanium oxide, iron oxide, cerium oxide, and tungsten oxide. The ultraviolet scattering agent may be an ultraviolet scattering agent that has not been subjected to surface treatment, or an ultraviolet scattering agent that has been subjected to various hydrophobic surface treatments. As the surface treatment agent, a surface treatment agent commonly used in the cosmetic field may be used, such as silicones such as polydimethylsiloxane and alkyl-modified silicones, alkoxysilanes such as octyltriethoxysilane, dextrin fatty acid esters such as dextrin palmitate, and fatty acids such as stearic acid. In the powder cosmetic of the present invention, component (C) is not essential, and its content is not particularly limited. When component (C) is contained, it is preferably 5 to 20% by mass, more preferably 7 to 15% by mass, based on the total mass of the powder cosmetic. By containing component (C) at such a content, the feeling of use when using the powder cosmetic can be improved. (D) Organic powder The cosmetics of the present invention may contain organic powder. Organic powder is relatively soft and has a nearly spherical shape. Therefore, powder cosmetics containing organic powder can improve the spreading on the skin during use, and are therefore preferably used in powder cosmetics. Examples of such organic powders include silicone elastomer powders, silicone powders, silicone resin-coated silicone elastomer powders, polyamide resin powders (nylon powders), polyethylene powders, polymethyl methacrylate powders, polystyrene powders, copolymer resin powders of styrene and acrylic acid, benzoguanamine resin powders, polyurethane resin powders, polytetrafluoroethylene powders, and the like. In the powder cosmetic of the present invention, component (D) is not essential, and its content is not particularly limited. When component (D) is contained, it is preferably 5 to 30% by mass, more preferably 10 to 20% by mass, based on the total mass of the powder cosmetic. By containing component (D) at such a content, the feeling of use when using the powder cosmetic can be improved. (E) Other ingredients In addition, the powder cosmetic of the present invention may also be appropriately formulated with water, surfactants other than component (B), pH adjusters, humectants, thickeners, dispersants, stabilizers, preservatives, antioxidants, flavors, dyes, etc. within the scope of achieving the purpose of the present invention. [Method for producing powder cosmetics] The method for producing the powder cosmetic of the present invention is not particularly limited, and a known method can be used. For example, a "dry method" can be used in which the components are mixed without using a solvent, and the mixture is filled into a container and molded as needed; a "wet method" can be used in which the components are added to a volatile dispersion medium to form a slurry, the slurry is filled into a container, and the solvent is removed to solidify the mixture; a method in which the slurry is finely dropletized by mechanical shear force, a dry gas is supplied to the fine droplets to dry them, a dry powder is obtained, and a conventional dry molding method is performed as needed, etc. The solvent used in preparing the slurry during the manufacturing process is not particularly limited, and examples thereof include purified water, cyclic silicone, light liquid isoparaffin, lower alcohol, ethers, LPG, fluorocarbon, N-methylpyrrolidone, fluoroalcohol, volatile straight-chain silicone, etc. Representative substances of lower alcohol include ethanol, isopropanol, etc. According to the characteristics of the compounding components used, one or more of these solvents are mixed and used appropriately. As the product form of the powder cosmetic of the present invention, all product forms in the category of powder cosmetics such as solid, powdered, and liquid can be adopted. Specifically, the product forms such as foundation, eye shadow, blush, talcum powder, perfume powder, baby powder, pressed powder, deodorant powder, and scented powder can be adopted. The powder cosmetic of the present invention has good makeup lasting property because sebum destruction is suppressed, so it is particularly preferably made into a powder solid cosmetic. Example The present invention is further described in detail with reference to the following examples, but the present invention is not limited to these examples. Unless otherwise specified, the amount of a component is expressed as mass % relative to the system in which the component is blended. Powder cosmetics having the compositions shown in Table 1 below were prepared and evaluated for the following items. The results are also shown in Table 1. (1) Card powder (よれ) The powder cosmetics were applied to the skin, and sensory evaluation was performed on the changes in the applied state 4 hours and 6 hours after the application. A: The application state changes very little, and no powder is observed to fall into the grooves on the skin, and there is no makeup coming off B: Powder was partially seen falling into the groove, but almost no makeup came off C: (Baseline) Powder was seen falling into the grooves, and the makeup was slightly removed D: Powder is seen falling into the grooves on the entire face, and makeup is coming off (2) Floating powder The powder cosmetics were applied to the skin, and the coating film was observed 4 hours and 6 hours after application to perform sensory evaluation. A: Maintain the uniformity of the coating film B: Powder was observed floating on the coating film in some areas, but no makeup removal was felt C: (Baseline) Mottled pattern due to powder floating was observed on part of the face, but not noticeable as a whole D: Powder floats from the coating film to form a mottled pattern, and there is makeup removal (3)Sebum destruction (sebum collapse) The powder cosmetic was applied to the entire face, and the state of the applied surface was observed 4 hours and 6 hours after application, and the state was sensory evaluated. A: Dry and clean without any oily sheen B: On part of the face, the dryness is reduced but no oiliness is observed C: (Baseline) Slight oiliness was observed on part of the face, but no overall makeup removal was observed D: The whole face is shiny and looks damaged. [Table 1] Table 1 *1: Trade name KSP-100, manufactured by Shin-Etsu Chemical Co., Ltd.

Claims

1. A powder cosmetic, characterized in that: It contains (A) an inorganic powder having an average particle size of 20 μm or less and (B) an amphoteric surfactant.

2. The powder cosmetic according to claim 1, wherein: The component (A) contains an inorganic powder having an average particle size of 200 nm or less.

3. The powder cosmetic according to claim 1 or 2, wherein: The component (A) contains fine-particle zinc oxide.

4. The cosmetic according to claim 3, wherein: The content of the fine-particle zinc oxide is 1 to 10% by mass based on the total mass of the component (A).

5. The cosmetic according to claim 1 or 2, wherein: The component (B) is selected from the group consisting of alkyl betaine type surfactants, alkyl amide betaine type surfactants, imidazoline type surfactants, amine oxide type surfactants, amino acid type surfactants, sulfobetaine type surfactants and lecithin type surfactants.

6. The cosmetic according to claim 1 or 2, wherein: The component (B) is an alkyl betaine type surfactant or an imidazoline type surfactant.

7. The cosmetic according to claim 1 or 2, further comprising (C) an oil component.

8. The cosmetic according to claim 1 or 2, further comprising (D) an organic powder.

9. The cosmetic according to claim 1 or 2, wherein: Based on the total mass of the cosmetics, The content of component (A) is 30 to 90% by mass, The content of the component (B) is 0.1 to 10% by mass. The content of the component (C) is 5 to 20% by mass, and The content of the component (D) is 5 to 30% by mass.

10. The cosmetic according to claim 1 or 2, which is a powder solid cosmetic.

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