Water-in-oil emulsion solid cosmetics

Abstract

To provide a water-in-oil emulsified solid cosmetic that gives uniform, stable and favorable coloration, without color unevenness in outer appearance.SOLUTION: A water-in-oil emulsified solid cosmetic contains following components (A)-(E): (A) organic modified clay mineral, (B) a composite coloring pigment of a silicone compound and an acylated amino acid, (C) wax, (D) a nonionic surfactant with an HLB of 6 or less, and (E) water. The content of the component (B) is 5-30 mass%. The mass ratio of the component (A) to the component (B), (A) / (B), is 0.01-0.14.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-in-oil emulsified solid cosmetic preparation. [Background technology]

[0002] Water-in-oil emulsion solid cosmetics are solidified so that they do not flow even at room temperature and are filled into containers, taking into consideration the convenience of carrying them around and ease of use. Compared to oil-based cosmetics, they are emulsion types that contain water, so they can provide a refreshing feeling and a moisturizing sensation when used. In order to maintain a certain form in such cosmetics, solid oil components such as waxes are usually used, and efforts have been made to achieve both appropriate hardness and good usability. For example, Patent Document 1 describes a water-in-oil solid emulsion cosmetic that uses a combination of polyether-modified silicone, wax, and a branched fatty acid ester that is liquid at 25°C, along with an organic titanate-treated powder, thereby suppressing a decrease in hardness around the melting temperature of the wax and providing an excellent feel when used. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-129296 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional water-in-oil emulsion solid cosmetics have had the problem that when solidified, the color of the blended color pigments does not develop well, resulting in uneven color appearance. [Means for solving the problem]

[0005] The present inventors have discovered that by using a combination of an organically modified clay mineral and a color pigment that has been compositely treated with a silicone compound and an acylated amino acid, the dispersibility of the color pigment is improved, and a water-in-oil emulsified solid cosmetic can be obtained that provides uniform, stable, and excellent color development, is free of external color unevenness, is smooth when applied, and has an excellent glossy finish.

[0006] The present invention relates to the following components (A) to (E): (A) Organically modified clay minerals, (B) a color pigment complex-treated with a silicone compound and an acylated amino acid; (C) wax, (D) Nonionic surfactants with an HLB of 6 or less (E)Water The present invention relates to a water-in-oil emulsion solid cosmetic preparation comprising the above, wherein the content of component (B) is 5 to 30 mass %, and the mass ratio of component (A) to component (B), (A) / (B), is 0.01 to 0.14. [Effects of the Invention]

[0007] The water-in-oil emulsion solid cosmetic preparation of the present invention has improved dispersibility of color pigments, provides uniform and stable good color development, is free of color unevenness in appearance, is smooth when applied, and has an excellent glossy finish.In addition, it also has good filling properties during production. DETAILED DESCRIPTION OF THE INVENTION

[0008] The organically modified clay mineral of component (A) used in the present invention can be any of those commonly used in cosmetics, without any particular limitation. For example, cationically modified clay minerals obtained by treating layered clay minerals such as bentonite, laponite, hectorite, montmorillonite, and magnesium aluminum silicate with a quaternary ammonium salt-type cationic surfactant are preferred. Here, the quaternary ammonium salt type cationic surfactant is represented by the following formula:

[0009] [ka]

[0010] (In the formula, R 1 represents an alkyl group having 10 to 22 carbon atoms or a benzyl group, and R 2 represents a methyl group or an alkyl group having 10 to 22 carbon atoms, and R 3 and R 4 represents an alkyl group or a hydroxyalkyl group having 1 to 3 carbon atoms, and X represents a halogen atom or a methyl sulfate residue. It is expressed as:

[0011] Specifically, dodecyltrimethylammonium chloride, myristyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, myristyldimethylethylammonium chloride, cetyldimethylethylammonium chloride, stearyldimethylethylammonium chloride, behenyldimethylethylammonium chloride, myristyldiethylmethylammonium chloride, cetyldiethylmethylammonium chloride, stearyldiethylmethylammonium chloride, behenyldiethylmethylammonium chloride, Examples of the hydroxyethyl ammonium chloride include benzyl dimethyl myristyl ammonium chloride, benzyl dimethyl cetyl ammonium chloride, benzyl dimethyl stearyl ammonium chloride, benzyl dimethyl behenyl ammonium chloride, benzyl methyl ethyl cetyl ammonium chloride, benzyl methyl ethyl stearyl ammonium chloride, distearyl dimethyl ammonium chloride, dibehenyl dihydroxyethyl ammonium chloride, and the above compounds in which the chloride is replaced with a bromide compound, as well as dipalmityl propyl ethyl ammonium methyl sulfate.

[0012] Preferred examples of cationically modified clay minerals obtained by treating layered clay minerals with quaternary ammonium salt-type cationic surfactants include dimethyl distearyl ammonium hectorite, dimethyl distearyl ammonium bentonite, and benzyl dimethyl stearyl ammonium hectorite, with dimethyl distearyl ammonium hectorite being more preferred. Commercially available products include Benton 38, Benton 38VCG, and Benton 27 (all manufactured by Elementis Japan Co., Ltd.).

[0013] The cation-modified clay mineral can also be used as a dispersion diluted with a solvent, because it improves workability and has an excellent effect of thickening oil. Specifically, it is preferable to use a premix gel in which the cation-modified clay mineral is dispersed in a solvent in advance.The solvent is not limited as long as it can be thickened by the cation-modified clay mineral, but it is preferable to use a premix gel in which a non-volatile oil is previously contained as a solvent.In addition, in order to efficiently disperse the cation-modified clay mineral and exhibit the thickening effect, it is preferable that the premix solvent contains propylene carbonate, propylene glycol dicaprylate, and phenyl trimethicone, and among them, propylene carbonate is more preferable.It can also contain ethanol or water. The content of the cation-modified clay mineral in the premix gel is preferably 5 to 25 mass %, more preferably 8 to 20 mass %, and even more preferably 10 to 18 mass %. Examples of premix gels that can be used include Benton Gel EUGV, Benton Gel MIOV, Benton Gel VS-5 PCV, and Benton Gel PTM, each containing 10% by mass of cation-modified clay minerals, 18% by mass of cation-modified clay minerals, and 15% by mass of cation-modified clay minerals (all manufactured by Elementis Japan Co., Ltd.); and other commercially available products such as Benton Gel ISD V, Benton Gel OLV V, Benton Gel PTIS V, Benton Gel TMF V, and Benton Gel VS-5PC V HV (all manufactured by Elementis Japan Co., Ltd.).

[0014] Component (A) can be used alone or in combination of two or more, and from the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, and imparting a glossy finish, the content is preferably 0.1 mass% or more of the total composition, more preferably 0.15 mass% or more, even more preferably 0.25 mass% or more, and preferably 3 mass% or less, more preferably 2.5 mass% or less, even more preferably 2 mass% or less. The content of component (A) is preferably 0.1 to 3 mass% of the total composition, more preferably 0.15 to 2.5 mass%, even more preferably 0.25 to 2 mass%.

[0015] Component (B) used in the present invention is a color pigment that has been subjected to a composite treatment of a silicone compound and an acylated amino acid. Examples of color pigments include those commonly used in cosmetics, such as metal oxides such as titanium oxide, zinc oxide, yellow iron oxide, black iron oxide, red iron oxide, Prussian blue, ultramarine blue, chromium oxide, and chromium hydroxide; metal complexes such as manganese violet and cobalt titanate; and inorganic pigments such as carbon black. Examples of color pigments include synthetic organic pigments, organic dyes, and lake pigments thereof, such as 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. 405, Red No. 505, Orange No. 203, Orange No. 204, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 401, Blue No. 1, and Blue 404. Examples of color pigments include natural organic dyes such as β-carotene, caramel, and paprika color, as well as complexes of these color pigments. Of these, metal oxides are preferred.

[0016] Examples of silicone compounds used for the surface treatment of these color pigments include dimethicone, methicone, and hydrogen dimethicone, with dimethicone being preferred.

[0017] In addition, the acylated amino acids used in the surface treatment of color pigments include, for example, proline, hydroxyproline, alanine, glycine, sarcosine, lysine, aspartic acid, glutamic acid, and salts thereof. Examples of the amino acid salts include Na, Ca, Al, Mg, Zn, Zr, and Ti salts. Furthermore, the fatty acid residue constituting the acyl group of the acylated amino acid is preferably a fatty acid residue having 1 to 23 carbon atoms, more preferably a fatty acid residue having 8 to 20 carbon atoms. Specific examples of the acylated amino acid include lauroyl glutamic acid, dilauroyl glutamic acid, stearoyl glutamic acid, cocoyl glutamic acid, lauroyl aspartic acid, dilauroyl glutamic acid lysine, and lauroyl lysine, with stearoyl glutamic acid, lauroyl aspartic acid, dilauroyl glutamic acid lysine, and lauroyl lysine being preferred. The acylated amino acid also includes salts thereof, with examples of these salts including Na, Ca, Al, Mg, Zn, Zr, and Ti salts, with Na and Ca salts being preferred, and Na salts being more preferred. As the acylated amino acid salt, from the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, and imparting a glossy finish, disodium stearoyl glutamate and sodium lauroyl aspartate are preferred, and disodium stearoyl glutamate is more preferred.

[0018] The color pigment can be treated with the silicone compound and the acylated amino acid by a conventional method. For example, the powder and the treatment agent can be stirred and mixed with a volatile oil to be used as a slurry dispersion. The slurry dispersion is preferably prepared by stirring and mixing the hydrophobic treated powder and the volatile oil using a ball mill method. Alternatively, a commercially available dispersion in which the hydrophobic treated powder is diluted with a volatile oil in advance can be used as the slurry dispersion. The treatment amount varies depending on the color pigment, but from the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, and imparting a glossy finish, the treatment amount is preferably 0.1 to 10 mass %, and more preferably 0.5 to 5 mass %, based on 100 mass % of the surface-treated color pigment. The mass ratio of the silicone compound to the acylated amino acid used for treatment is preferably 1:1 to 20:1, more preferably 2:1 to 10:1, from the viewpoint of obtaining good color development and preventing color unevenness in appearance.

[0019] As component (B), it is more preferable to use one or a combination of two or more selected from yellow iron oxide complexed with dimethicone and an acylated amino acid, black iron oxide complexed with dimethicone and an acylated amino acid, red iron oxide complexed with dimethicone and an acylated amino acid, and titanium oxide complexed with dimethicone and an acylated amino acid.

[0020] Component (B) can be used alone or in combination of two or more, and the content is 5% by mass or more, preferably 6% by mass or more, more preferably 7% by mass or more, and 30% by mass or less, preferably 26% by mass or less, more preferably 23% by mass or less, based on the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, and imparting a glossy finish. The content of component (B) is 5 to 30% by mass, preferably 6 to 26% by mass, more preferably 7 to 23% by mass, based on the total composition.

[0021] The water-in-oil emulsion solid cosmetic preparation of the present invention preferably contains an extender pigment as component (G) as a powder other than the color pigment of component (B). Examples of extender pigments include mica (such as sericite, phlogopite, muscovite, lepidolite, biotite, and lepidolite), synthetic mica, kaolin, talc, alumina, boron nitride, plate-like barium sulfate, plate-like titanium oxide, plate-like cerium oxide, silicic acid, silicic anhydride, magnesium silicate, magnesium oxide, and aluminum oxide. Similarly to component (B), the extender pigment of component (G) is preferably a composite treatment of a silicone compound such as dimethicone, methicone, or hydrogen dimethicone with an acylated amino acid.

[0022] Component (G) can be used alone or in combination of two or more, and from the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, and imparting a glossy finish, the content is preferably 0.5% by mass or more of the total composition, more preferably 1% by mass or more, even more preferably 1.5% by mass or more, and preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 7% by mass or less. The content of component (G) is preferably 0.5 to 10% by mass of the total composition, more preferably 1 to 8% by mass, even more preferably 1.5 to 7% by mass.

[0023] The water-in-oil emulsion solid cosmetic preparation of the present invention may contain powders other than the color pigment of component (B) and the extender pigment of component (G). Examples of such powders include organic powders and pigment powders, and these may be used alone or in combination of two or more. The shape may be any of spherical, plate-like, needle-like, etc., and there are no particular limitations on the particle size (aerosol, fine particles, pigment-grade, etc.) or particle structure (porous, non-porous, etc.).

[0024] Examples of organic powders include nylon powder, polymethyl methacrylate, acrylonitrile-methacrylic acid copolymer powder, polyethylene powder, polystyrene powder, organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, polyurethane powder, silk powder, crystalline cellulose, and N-acyl lysine. Examples of pigment powder include organic tar pigments and lake pigments of organic colors.

[0025] Powders other than component (B) and component (G) may be used as they are, or may be used after being subjected to a hydrophobic treatment.

[0026] In the water-in-oil emulsion solid cosmetic of the present invention, from the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, and imparting a glossy finish, the content of powders other than component (B) and component (G) is preferably 0.1% by mass or more of the total composition, more preferably 0.5% by mass or more, even more preferably 1% by mass or more, and preferably 10% by mass or less, more preferably 6% by mass or less, even more preferably 5% by mass or less. The content of powders other than component (B) is preferably 0.1 to 10% by mass of the total composition, more preferably 0.5 to 6% by mass, even more preferably 1 to 5% by mass.

[0027] From the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, and a glossy finish, the total content of powders including components (B) and (G) is preferably 1% by mass or more, more preferably 2% by mass or more, and even more preferably 5% by mass or more, and is preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 35% by mass or less. The total content of powders including component (B) is preferably 1 to 50% by mass, more preferably 2 to 40% by mass, and even more preferably 5 to 35% by mass.

[0028] In the present invention, the mass ratio (A) / (B) of component (A) to component (B) is 0.01 or more, preferably 0.011 or more, more preferably 0.013 or more, and 0.14 or less, preferably 0.12 or less, more preferably 0.1 or less, from the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, and imparting a glossy finish. The mass ratio (B) / (A) of component (B) to component (A) is 0.01 to 0.14, preferably 0.011 to 0.12, and more preferably 0.013 to 0.1.

[0029] Component (C) used in the present invention is a wax. Component (C) is present in the oil phase and plays a role in adjusting the viscosity of the cosmetic and solidifying the cosmetic. Examples of waxes include animal waxes, vegetable waxes, mineral waxes, and synthetic waxes, and these may be used alone or in combination of two or more. Among these, mineral waxes are preferred from the viewpoints of usability such as uniform adhesion to the skin, prevention of hardness reduction, and hardness. Specific examples of waxes include hydrocarbons such as paraffin wax, microcrystalline wax, ozokerite, ceresin wax, polyethylene wax, and Fischer-Tropsch wax; and waxes such as beeswax, lanolin, carnauba wax, candelilla wax, and rice wax. One of these may be used alone, or two or more may be used in combination. Among these, from the viewpoints of usability such as uniform adhesion to the skin and filling moldability, hydrocarbons are preferred, and microcrystalline wax and paraffin wax are more preferred.

[0030] Component (C) can be used alone or in combination of two or more, and the content is preferably 1% by mass or more, more preferably 1.5% by mass or more, and even more preferably 2.5% by mass or more, based on the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, imparting a glossy finish, filling moldability, storage stability, etc., and is preferably 10% by mass or less, more preferably 8% by mass or less, and even more preferably 6% by mass or less. The content of component (C) is preferably 1 to 10% by mass, more preferably 1.5 to 8% by mass, and even more preferably 2.5 to 6% by mass, based on the total composition.

[0031] The nonionic surfactants of component (D) used in the present invention are those commonly used in cosmetics, such as sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, sucrose fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid esters, polyoxyethylene phytostanol ether, polyoxyethylene phytosterose ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, alkyl glyceryl ether-modified silicones, polyoxyalkylene-modified silicones, polyoxyalkylene-alkyl co-modified silicones, and polyoxyalkylene-fluoroalkyl co-modified silicones.

[0032] Of these, sorbitan fatty acid esters and silicone surfactants are preferred from the viewpoints of obtaining good color development, no uneven color appearance, smooth application, and imparting a glossy finish. Examples of sorbitan fatty acid esters include sorbitan monostearate (HLB: 4.5), sorbitan isostearate (HLB: 4.7), sorbitan sesquistearate (HLB: 4.2), sorbitan tristearate (HLB: 2.1), sorbitan monoisostearate (HLB: 4.7), sorbitan sesquiisostearate (HLB: 4.5), sorbitan monooleate (HLB: 4.3), and sorbitan sesquioleate (HLB: 3.7). Examples of polyoxyalkylene-modified silicones that can be used include commercially available products such as SH3771M, SH3772M, SH3773M, SH3775M, SH3749, and DC5200 manufactured by Dow Corning Toray Co., Ltd., and KF-6011, KF-6012, KF-6013, KF-6015, KF-6016, KF6017, KF-6004, and KF-6028 manufactured by Shin-Etsu Chemical Co., Ltd.

[0033] Furthermore, the nonionic surfactant of component (D) has an HLB of 6 or less, and from the viewpoints of obtaining good color development, preventing color unevenness in appearance, and dispersibility of powder, it is preferable that the HLB be 2 to 5.5.

[0034] Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and for nonionic surfactants, it can be calculated using Griffin's formula. The HLB of a surfactant mixture consisting of two or more nonionic surfactants can be calculated as follows: The HLB of the surfactant mixture is the arithmetic average of the HLB values ​​of each nonionic surfactant based on their blending ratio.

[0035] Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of nonionic surfactant X. Wx is the weight (g) of nonionic surfactant X having a value of HLBx

[0036] The nonionic surfactant of component (D) can be used alone or in combination of two or more, and from the viewpoints of obtaining good color development, no color unevenness in appearance, and powder dispersibility, the content is preferably 0.3 mass% or more of the total composition, more preferably 0.5 mass% or more, even more preferably 0.8 mass% or more, and preferably 5 mass% or less, more preferably 4 mass% or less, even more preferably 3.5 mass% or less. The content of component (D) is preferably 0.3 to 5 mass% of the total composition, more preferably 0.5 to 4 mass%, even more preferably 0.8 to 3.5 mass%.

[0037] In the present invention, from the viewpoints of obtaining good color development, no color unevenness in appearance, smooth application, imparting a glossy finish, and filling ability, the content of water in component (E) is preferably 10% by mass or more of the total composition, more preferably 15% by mass or more, even more preferably 18% by mass or more, and preferably 45% by mass or less, more preferably 40% by mass or less, even more preferably 38% by mass or less. The content of component (E) in the total composition is preferably 10 to 45% by mass, more preferably 15 to 40% by mass, even more preferably 18 to 38% by mass.

[0038] The water-in-oil emulsion solid cosmetic of the present invention can further contain (F) an oily component other than component (C), and can apply evenly and solidify firmly, yet melt smoothly when taken with the fingers, giving it a light, spreadable feel. Such an oil component is preferably an oil component that is liquid at 25° C. Here, liquid means that it has fluidity. The oil component that is liquid at 25°C may be any oil component that is used in ordinary cosmetics, and examples thereof include linear or branched hydrocarbon oils such as liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, mineral oil, squalane, α-olefin oligomer, polyisobutylene, polybutene, hydrogenated polyisobutene, and hydrogenated polydecene; isononyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, tricyclodecanemethyl isononanoate, ethyl isostearate, isobutyl isostearate, isopropyl isostearate, and isostearyl isononanoate. 2-Hexyldecyl Phosphate, Di-2-Hexylhexyl Succinate, Bis-Ethoxydiglycol Succinate, Hexyl Laurate, Di(Caprylic / Capric) Propanediol, Neopentyl Glycol Diisononanoate, Neopentyl Glycol Dicaprate, Glyceryl Diisostearate, Polyglyceryl Diisostearate, Propanediol Diisostearate, Trimethylolpropane Triisostearate, Glyceryl Triisostearate, Diglyceryl Triisostearate, Diglyceryl Tetraisostearate, Diisostearyl Malate , Octyldodecyl Malate, Glycerin Fatty Acid Esters, Octyldodecyl Myristate, Isopropyl Myristate, 2-Ethylhexyl Palmitate, Isopropyl Palmitate, Cetyl 2-Ethylhexanoate, Trimethylolpropane Tri-2-Hexylhexanoate, Glyceryl Tri-2-Ethylhexanoate, Octyldodecyl Myristate, 2-Hexyldecyl Myristate, 2-Hexyldecyl 2-Ethylhexanoate, Neopentyl Glycol Di-2-Ethylhexanoate, 2-Ethylhexyl Hydroxystearate, Caprylic / Capric Triacid Ester oils such as glyceryl, glyceryl trioctanoate, neopentyl glycol dioctanoate, octyl methoxycinnamate, 2-ethylhexyl paramethoxycinnamate, and propylene carbonate; ether oils such as cetyl dimethyl butyl ether, dicaprylyl ether, and dicaprylyl ether; higher alcohols having a linear or branched alkyl or alkenyl group and having 10 to 24 carbon atoms, such as lauryl alcohol, myristyl alcohol, isocetyl alcohol, isostearyl alcohol, 2-octyldodecanol, and oleyl alcohol;Examples of suitable oils include silicone oils such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, polyether-modified silicone, acrylic-modified silicone, fluorine-modified silicone, and higher alcohol-modified organopolysiloxane; fluorine oils such as fluoropolyether, perfluoroalkyl ether silicone, and fluorine-modified silicone; phenoxyethanol, tocopherol, and the like.

[0039] It is more preferable that component (F) contains at least either an ester oil or a silicone oil, from the viewpoints of obtaining good color development, no color unevenness in appearance, a smooth feel when applied, melting thickly when taken with the fingers, and imparting a light, spreadable feel.

[0040] Component (F) can be used alone or in combination of two or more, and from the same viewpoint, the content is preferably 10% by mass or more of the total composition, more preferably 20% by mass or more, even more preferably 25% by mass or more, and is preferably 50% by mass or less, more preferably 45% by mass or less, even more preferably 43% by mass or less. The content of component (F) is preferably 10 to 50% by mass of the total composition, more preferably 20 to 45% by mass, even more preferably 25 to 43% by mass.

[0041] In addition to the above, the water-in-oil emulsified solid cosmetic preparation of the present invention may contain ingredients commonly used in cosmetics, such as surfactants other than component (D), thickeners, preservatives, pH adjusters, plant extracts, moisturizers, alcohols, pharmaceuticals, ultraviolet absorbers, colorants, fragrances, etc.

[0042] The water-in-oil emulsion solid cosmetic of the present invention can be produced by first mixing powder components containing component (B), then adding and dispersing this powder mixture and component (A), an organically modified clay mineral, to an oil phase component containing component (C) that has been heated and dissolved at 80°C, then adding an aqueous phase component containing component (E) that has been heated and dissolved at 80°C to this dispersion and dispersing it with a homogenizer, and then filling the mixture into a container and cooling it to room temperature. The uses of the water-in-oil emulsified solid cosmetic of the present invention are not particularly limited, and examples thereof include makeup cosmetics, skin care cosmetics, and cleansing cosmetics. The water-in-oil emulsified solid cosmetic of the present invention is suitable as makeup cosmetics such as foundation, makeup base, concealer, blusher, and eye shadow. [Example]

[0043] Examples 1 to 10 and Comparative Examples 1 to 6 Water-in-oil emulsion solid cosmetics (foundations) were prepared with the compositions shown in Tables 1 and 2 below, and evaluated for appearance (color unevenness), hue, saturation, L*, a*, b*, b* / a*, smooth application feel, glossy finish, and filling ability. The results are also shown in Tables 1 and 2.

[0044] (Manufacturing method) The powder components were stirred and mixed in a Henschel mixer, and this and dimethyl distearyl ammonium hectorite were added to and dispersed in a solution of the oil component heated and dissolved at 80°C. The aqueous phase component was heated and dissolved at 80°C and added to this solution, and the mixture was dispersed using a homogenizer. The mixture was then filled into a container and cooled to room temperature to obtain a water-in-oil emulsion solid cosmetic (foundation).

[0045] (Evaluation method) (1) Appearance (color unevenness): A specialist evaluator visually inspected the appearance of each cosmetic product and rated it as "Good" if there was no color unevenness, "uneven color" if there was marble-like color unevenness, and "slightly uneven color" if there was slight color unevenness.

[0046] (2)Hue: The appearance of each cosmetic was visually observed by expert evaluators, and Example 2 was used as the reference product. Those with no difference in hue from this were rated as "Good," those whose hue was shifted to the red side of the reference product were rated as "Red," and those whose hue was shifted slightly to the red side were rated as "Slightly Red."

[0047] (3) Saturation: The appearance of each cosmetic was visually observed by expert evaluators, and Example 2 was used as the reference product. Cosmetics with no difference in saturation from this were rated as "Good," cosmetics with higher saturation than the reference product were rated as "High," cosmetics with lower saturation than the reference product were rated as "Low," and cosmetics with slightly higher and lower saturation than the reference product were rated as "Slightly High" and "Slightly Low," respectively.

[0048] (4) L*, a*, b*, b* / a*: Measurements were taken using an X-Rite Ci5 integrating sphere spectrophotometer. The cosmetic material was dissolved at 85°C and dispensed into a glass measurement cell, which was then cooled and solidified to provide a measurement sample. The results were shown as the average of n = 3 measurements.

[0049] (5) Smooth application: Five expert evaluators performed a sensory evaluation of the smoothness of each cosmetic product when it was applied to the face. The evaluation was conducted on a 7-point scale, with "7" being the smoothest application feel and "1" being the least smooth application feel.

[0050] (6) Glossy finish: Five expert evaluators sensorily evaluated the glossiness of the finished product when each cosmetic product was applied to the face. The evaluation was conducted on a 5-point scale, with "5" representing the most glossy finish and "1" representing the least glossy finish.

[0051] (7) Fillability: The filling property was evaluated when the bulk melted at 85°C was filled into a flat dish container. Problems such as poor bulk fluidity, an uneven bulk surface after filling, or sharp corners were evaluated as "poor" or "slightly poor," while problems without problems were evaluated as "good." Comparative Example 5 could not be filled, so it was evaluated as "poor."

[0052] [Table 1]

[0053] [Table 2]

[0054] The ingredients marked with *1 to *12 in the table are as follows: *1: Span 120-LQ-(RB) (manufactured by Croda Japan; HLB4.7) *2: Silicone KF-6028P(-G) (Shin-Etsu Chemical Co., Ltd.; HLB 4.0) *3: Paraffin wax 155 (manufactured by Nippon Seiro Co., Ltd.; melting point 69°C) *4: Topco S-903C (manufactured by Toyo ADL; melting point 76°C) *5: Silicone KF-96A-6CS(-G) (Shin-Etsu Chemical Co., Ltd.) *6: Silicone SH556 FLUID (manufactured by Toray Dow Corning) *7: Silicone TSF405A (manufactured by Momentive Performance Materials Japan, LLC) *8: TOREFIL (35%) C (manufactured by Daito Kasei Kogyo Co., Ltd.) *9: DOWSIL RSN-0749 RESIN (50% solution, manufactured by Dow Corning Toray Co., Ltd.) *10: Benton 38VCG (manufactured by Elementis Japan) *11: Treated with dimethicone: 7% by mass, stearoyl glutamic acid 2Na: 1% by mass. *12: Treated with 1.5% by mass of isopropyl titanium triisostearate and 0.42% by mass of sodium lauroyl aspartate.

Claims

1. The following components (A) to (E) and (F): (A) organically modified clay minerals; (B) a color pigment complex-treated with a silicone compound and an acylated amino acid; (C) 1 to 10 mass% of hydrocarbon wax, (D) 0.3 to 5 mass% of a nonionic surfactant having an HLB of 6 or less, (E) Water (F) 25 to 45% by mass of an oil component other than component (C) that is liquid at 25°C wherein the content of component (B) is 5 to 30% by mass, and the mass ratio (A) / (B) of component (A) to component (B) is 0.01 to 0.

14.

2. 2. The water-in-oil emulsion solid cosmetic preparation according to claim 1, wherein component (A) is a cation-modified clay mineral.

3. 3. The water-in-oil emulsion solid cosmetic preparation according to claim 1, wherein the content of component (A) is 0.1 to 3% by mass of the total composition.

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