Water-in-oil emulsion cosmetic

Abstract

To provide water-in-oil emulsion cosmetics that can be uniformly applied to areas experiencing uneven coloration such as acne scars, with excellent spot adhesion and without streaks and creasing, while maintaining the ease of spread over the skin.SOLUTION: Water-in-oil emulsion cosmetics contain following components (A), (B), (C) and (D): (A) powder, (B) 5-25 mass% of silicone-based film formation agent, (C) volatile oil, and (D) nonvolatile oil. The mass ratio of component (B) to component (C), (B) / (C), is 0.27-0.8. The mass ratio of component (B) to component (D), (B) / (D), is 0.4-2.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] Conventionally, various powders and film-forming agents have been used to obtain cosmetics that are resistant to makeup smudging, have excellent makeup staying power, and have a good feel when used. For example, Patent Document 1 describes an oil-in-water emulsion cosmetic that contains trimethylsiloxysilicate, fine zinc oxide, as well as a specific fluorine silicone resin and specific spherical silica. Despite containing trimethylsiloxysilicate, which is a film-forming agent, the cosmetic is not sticky and is quickly absorbed into the skin after application, resulting in a quick makeup finish. Furthermore, when used as a makeup base, the cosmetic prevents the skin from drying out after applying a powder foundation over it, and provides a finish without powder accumulating in fine wrinkles. Patent Document 2 describes that a cosmetic composition containing a hydrophobically treated powder, trimethylsiloxysilicate, a specific fluorine-modified silicone, and fine zinc oxide particles with a certain specific surface area suppresses the feeling of tightness and unevenness after application, and provides excellent makeup application when applied as a makeup base with a powder foundation, or when used as foundation alone. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-120662 A [Patent Document 2] JP 2013-181007 A Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional cosmetics are easy to spread on the skin, but have the problem of poor adhesion to areas prone to uneven skin tone, such as acne scars, leading to uneven application. [Means for solving the problem]

[0005] The present inventors have discovered that by using a silicone-based film-forming agent in combination with a volatile oil and a non-volatile oil in a specific ratio, it is possible to obtain a water-in-oil emulsion cosmetic which maintains ease of spread on the skin, has excellent spot adhesion to areas prone to uneven skin tone such as acne scars, can be applied evenly, and is less likely to smudge or crease.

[0006] The present invention comprises the following components (A), (B), (C) and (D): (A) Powder, (B) 5 to 25% by mass of a silicone-based film-forming agent, (C) volatile oils, (D) Fixed oil Contains a mass ratio (B) / (C) of the component (B) to the component (C) is 0.27 to 0.8; The present invention relates to a water-in-oil emulsion cosmetic, in which the mass ratio (B) / (D) of component (B) to component (D) is 0.4 to 2. Effect of the Invention

[0007] The water-in-oil emulsion cosmetic of the present invention maintains ease of spreadability on the skin, has excellent spot adhesion to areas with uneven skin tone problems such as acne scars, can be applied evenly, is less likely to become uneven, is less likely to crease, and is less likely to transfer color when wearing a mask. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] As the powder of component (A), those commonly used in cosmetics, such as color pigments, extender pigments, and luster pigments, can be used. The color pigments are those used in ordinary cosmetics, such as metal oxides such as titanium oxide, zinc oxide, cerium oxide, aluminum oxide, yellow iron oxide, black iron oxide, red ocher, Prussian blue, ultramarine, chromium oxide, and chromium hydroxide, metal complexes such as manganese violet and cobalt titanate, and inorganic pigments such as carbon black; Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 206, Red No. 207, Red No. 209, Red No. 300, Red No. 301, Red No. 302, Red No. 303, Red No. 304, Red No. 305, Red No. 306, Red No. 307, Red No. 309, Red No. 308, Red No. 309, Red No. 310, Red No. 311, Red No. 312, Red No. 313, Red No. 314, Red No. 315, Red No. 316, Red No. 317, Red No. 318, Red No. 319, Red No. 320, Red No. 321, Red No. 322, Red No. 323, Red No. 324, Red No. 325, Red No. 326, Red No. 327, Red No. 328, Red No. 329, Red No. 330, Red No. 331, Red No. 332, Red No. 333, Red No. 334, Red No. 335, Red No. 336, Red No. 337, Red No. 338, Red No. 339, Red No. 339, Red No synthetic organic pigments such as Red No. 20, 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 No. 404; natural organic pigments such as β-carotene, caramel, and paprika color, and composites of these color pigments and composite pigments combining these color pigments with pearl pigments. Examples of the pearl pigments to be treated include natural or synthetic inorganic powders such as mica, phlogopite, talc, silica, sericite, glass, kaolin, bismuth oxychloride, cerium oxide, calcium sulfate, barium sulfate, magnesium sulfate, and plate-like alumina powder. Specific examples of composite pigments include titanium oxide-coated mica, iron oxide-coated mica, iron oxide-coated titanium mica, iron oxide-coated synthetic phlogopite, chromium oxide-coated titanium mica, titanium oxide-coated glass powder, iron oxide-coated glass powder, titanium oxide-containing glass powder, and iron oxide-containing glass powder. Among these, metal oxides are preferred, and it is more preferred to include at least one or more selected from titanium oxide, zinc oxide, yellow iron oxide, black iron oxide, and red iron oxide.

[0009] Examples of the extender pigments include those used in ordinary cosmetics, such as inorganic extender pigments such as magnesium silicate, aluminum silicate, talc, sericite, mica, synthetic fluorophlogopite, glass powder, phlogopite, kaolin, clay, bentonite, hectorite, zeolite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, and magnesium carbonate, as well as composite powders of these.

[0010] The luster pigments may be those used in ordinary cosmetics, such as plate-like powders of mica, synthetic phlogopite, glass, silica, alumina, etc., the surface of which is coated with colorants such as titanium oxide, iron oxide, silicon oxide, Prussian blue, chromium oxide, tin oxide, chromium hydroxide, gold, silver, carmine, organic pigments, etc., and film rolls cut into any shape such as polyethylene terephthalate-polymethyl methacrylate laminated powder, polyethylene terephthalate-aluminum vapor-deposited powder, and polyethylene terephthalate-gold vapor-deposited laminated powder may also be used. Further, organic powders such as polyethylene powder, polypropylene powder, polymethyl methacrylate powder, nylon powder, polytetrafluoroethylene powder, silicone powder, silicone rubber powder, silk powder, urethane powder, cellulose powder, starch powder, and polyethylene fluoride; inorganic powders such as silica, magnesium carbonate, and calcium carbonate; acylated lysine powders such as lauroyl lysine; and metal soap powders which are higher fatty acid metal salts can be used.

[0011] The powder of component (A) may be used as is, or may be subjected to a hydrophobic treatment by a conventional method before use. Examples of the hydrophobic treatment include surface treatments such as fluorine compound treatment, silicone treatment, alkyl treatment, alkylsilane treatment, metal soap treatment, water-soluble polymer treatment, amino acid treatment, acylated amino acid treatment, lecithin treatment, organic titanate treatment, polyol treatment, acrylic resin treatment, methacrylic resin treatment, and urethane resin treatment. When the powder of component (A) is used after being subjected to a hydrophobizing treatment, the content of component (A) means the mass including the agent used for the hydrophobizing treatment.

[0012] Component (A) may be used alone or in combination of two or more, and the content is preferably 5% by mass or more, more preferably 8% by mass or more, and even more preferably 10% by mass or more, preferably 30% by mass or less, more preferably 25% by mass or less, and even more preferably 20% by mass or less, based on the total composition, from the viewpoint of making the skin look beautiful. The content of component (A) is preferably 5 to 30% by mass, more preferably 8 to 25% by mass, and even more preferably 10 to 20% by mass, based on the total composition.

[0013] The film-forming agent of component (B) is one that is commonly used in cosmetics, such as trimethylsiloxysilicate and acrylic silicone resin.

[0014] Trimethylsiloxysilicate is a compound with a crosslinked structure based on a siloxane structure, [(CH3)3SiO 1 / 2 ] S [SiO2] T (S is 1 to 3, T is 0.5 to 8) is preferable. Moreover, from the viewpoint of suppressing wrinkling over time, the trimethylsiloxysilicate preferably has a mass average molecular weight of 1,000 to 10,000, more preferably 2,000 to 9,000, and even more preferably 3,000 to 6,000.

[0015] In addition, the material is preferably in a solid state from the viewpoint of preventing wrinkling over time. Trimethylsiloxysilicate can be blended in a solid state, but can also be dissolved in a solvent before use. The solvent can be silicone oil or hydrocarbon oil, and one or more selected from methyltrimethicone, dimethylpolysiloxane (2cs), dimethylpolysiloxane (6cs), octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and isododecane can be used.

[0016] As the trimethylsiloxysilicate, the cosmetic label name "trimethylsiloxysilicate" (INCI name "Trimethylsiloxysilicate") is preferred, and commercially available products such as SR1000 (manufactured by Momentive Performance Materials), BELSIL TMS 803 SILICONE RESIN (manufactured by Wacker Asahi Kasei Silicones), KF-7312T (60% by mass methyltrimethicone solution), KF-7312L (50% dimethylpolysiloxane (2cs) solution), KF-7312J (50% by mass decamethylcyclopentasiloxane solution), and KF-7312K (50% by mass dimethylpolysiloxane (6cs) solution) (all manufactured by Shin-Etsu Chemical Co., Ltd.) that have been dissolved in advance in a solvent can be used.

[0017] Examples of the acrylic silicone resin include vinyl polymers having a carbosiloxane dendrimer structure in the side chain, and acrylic-silicone graft copolymers. Examples of vinyl polymers having a carbosiloxane dendrimer structure in the side chain include silicone dendrimer-acrylic copolymers, and can be produced according to the production methods described in, for example, JP-A-11-1530 and JP-A-2000-63225. The number average molecular weight of the vinyl polymer having a carbosiloxane dendrimer structure used in the present invention is preferably 3,000 to 2,000,000, and more preferably 5,000 to 800,000, from the viewpoint of suppressing twisting over time. In addition, the property is preferably a solid from the viewpoint of suppressing twisting over time. The vinyl polymer having a carbosiloxane dendrimer structure can be blended in a solid state, but can also be dissolved in a solvent before use. Examples of the solvent include silicone oil and hydrocarbon oil, and one or more selected from dimethylpolysiloxane, decamethylcyclopentasiloxane, and isododecane can be used.

[0018] As the vinyl polymer having a carbosiloxane dendrimer structure in the side chain, a silicone dendrimer-acrylic copolymer is preferred, and the cosmetic label name "(Acrylates / Polytrimethylsiloxymethacrylate) Copolymer" (INCI name "Acrylates / Polytrimethylsiloxymethacrylate Copolymer") is preferred, and commercially available products such as FA4001CM (30% by mass decamethylcyclopentasiloxane solution) and FA4002ID (40% by mass isododecane solution) (both manufactured by Dow Corning Toray Co., Ltd.) that have been dissolved in a solvent in advance can be used.

[0019] The acrylic-silicone graft copolymer is a radical polymer of an organopolysiloxane compound having a radical polymerizable group at one end of the molecular chain and a radical polymerizable monomer mainly composed of acrylate and / or methacrylate. For example, the acrylic-silicone graft copolymer described in JP-A-2-25411 and JP-A-2-132141, etc., or the acrylic-silicone graft copolymer described in JP-A-3-162442 and JP-A-2003-104825, etc. can be used.

[0020] The acrylic-silicone graft copolymer is preferably one having the cosmetic labeling name "Acrylates / Dimethicone Copolymer" (INCI name "Acrylates / Dimethicone Copolymer"), and commercially available products such as KP545 (30% by mass decamethylcyclopentasiloxane solution), KP549 (40% by mass methyltrimethicone solution), and KP550 (40% by mass isododecane solution) (all manufactured by Shin-Etsu Chemical Co., Ltd.) that have been dissolved in advance in a solvent can be used.

[0021] From the viewpoints of excellent adhesion to the skin and suppression of creasing over time, the film-forming agent of component (B) preferably contains one or more compounds selected from trimethylsiloxysilicate and vinyl polymers having a carbosiloxane dendrimer structure in the side chain, and more preferably contains one or more compounds selected from trimethylsiloxysilicate.

[0022] One or more kinds of component (B) may be used, and the content is 5% by mass or more, preferably 8% by mass or more, and more preferably 10% by mass or more, and 25% by mass or less, preferably 20% by mass or less, and more preferably 14% by mass or less, based on the total composition, from the viewpoints of excellent adhesion to the skin and suppression of creasing over time. The content of component (B) is 5 to 25% by mass, preferably 8 to 20% by mass, and more preferably 10 to 14% by mass, based on the total composition.

[0023] In the volatile oil of component (C), volatile means that it has a flash point of 35 to 88°C. Volatile oils include volatile silicone oils and volatile hydrocarbon oils. Examples of volatile silicone oils include linear dimethylpolysiloxanes such as octamethyltrisiloxane (1cs), decamethyltetrasiloxane (1.5cs), and dimethylpolysiloxane (2cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, and tetrakis(trimethylsilyl)silane; and cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

[0024] Examples of volatile hydrocarbon oils include paraffinic hydrocarbon oils such as n-decane, n-undecane, and n-dodecane; isoparaffinic hydrocarbon oils such as isodecane, isododecane, and hydrogenated polyisobutene; and cyclic paraffinic hydrocarbon oils such as cyclodecane and cyclododecane. Among these, hydrocarbon oils having 8 to 16 carbon atoms are preferred, hydrocarbon oils having 10 to 16 carbon atoms are more preferred, and hydrocarbon oils having 12 carbon atoms are even more preferred.

[0025] As the volatile oil of component (C), decamethylcyclopentasiloxane, dimethylpolysiloxane, and isododecane are preferred, from the viewpoints of having excellent compatibility with components (B) and (D), forming a uniform film even after component (C) volatilizes after application to the skin, and suppressing color transfer to the mask.

[0026] Component (C) can be used alone or in combination of two or more, and the content is preferably 10% by mass or more in the total composition, more preferably 15% by mass or more, and even more preferably 20% by mass or more, preferably 50% by mass or less, more preferably 45% by mass or less, and even more preferably 40% by mass or less, from the viewpoints of excellent compatibility with components (B) and (D), forming a uniform film even after component (C) volatilizes after application to the skin, and suppressing color transfer to the mask. The content of component (C) is preferably 10 to 50% by mass, more preferably 15 to 45% by mass, and even more preferably 20 to 40% by mass in the total composition.

[0027] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is 0.27 or more, preferably 0.28 or more, more preferably 0.29 or more, and 0.8 or less, preferably 0.7 or less, and more preferably 0.5 or less, from the viewpoints of maintaining the ease of spreading on the skin, excellent adhesion to spots where uneven skin tone is a problem such as acne scars, uniform application, resistance to unevenness, resistance to creasing, and suppression of color transfer to masks. The mass ratio (B) / (C) of component (B) to component (C) is 0.27 to 0.8, preferably 0.28 to 0.7, and more preferably 0.29 to 0.5.

[0028] With regard to the non-volatile oil of component (D), "non-volatile" means that it has no flash point or has a flash point of 89°C or higher. The non-volatile oil of component (D) is preferably one that is liquid at 25° C. Liquid at 25° C. means one that has fluidity at 25° C., and includes cream-like and paste-like oils.

[0029] The non-volatile oil of component (D) may be any oil that is commonly used in cosmetics, and examples thereof include hydrocarbon oils, ester oils, ether oils, silicone oils, and higher alcohols. Examples of the hydrocarbon oil include linear or branched hydrocarbon oils such as liquid paraffin, liquid isoparaffin, hydrogenated polyisobutene, squalane, and squalene.

[0030] Ester oils include monoester oils, diester oils, triester oils and tetraester oils. Examples of monoester oils include monoesters of aliphatic or aromatic monocarboxylic or dicarboxylic acids having 2 to 24 carbon atoms. Specific examples include cetyl 2-ethylhexanoate, cetyl octanoate, isononyl isononanoate, isotridecyl isononanoate, hexyl laurate, isopropyl myristate, octyldodecyl myristate, myristyl myristate, 2-hexyldecyl myristate, isopropyl palmitate, octyl palmitate, palmitate, and ethylhexyl hexanoate. Examples of the lactose-soluble oleate include 2-hexyldecyl butyl stearate, isocetyl stearate, isocetyl isostearate, decyl oleate, isodecyl benzoate, octyl methoxycinnamate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, octyldodecyl lactate, lanolin acetate, 2-ethylhexyl succinate, 2-hexyldecyl adipate, alkyl benzoate (C12 to C15), and octyldodecyl 12-stearoyl stearate.

[0031] Examples of diester oils include diesters of dicarboxylic acids having 3 to 18 carbon atoms and difatty acid esters of polyhydric alcohols. Specific examples include propylene glycol dicaprylate, neopentyl glycol dicaprate, glycol distearate, propylene glycol diisostearate, glyceryl diisostearate, glyceryl monomyristate monoisostearate, glycerin di-2-heptylundecanoate, di-2-ethylhexyl succinate, diisopropyl sebacate, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, diisobutyl adipate, di-2-heptylundecyl adipate, and di-2-ethylhexyl sebacate.

[0032] Triester oils include tri-fatty acid esters of trivalent or higher polyhydric alcohols, and specific examples include glyceryl trimyristate, glyceryl triisopalmitate, glyceryl tri-2-heptylundecanoate, trimethylolpropane triethylhexanoate, trimethylolpropane trioctanoate, tri(caprylic / capric)glyceryl, trioleate, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, olive oil, and jojoba oil.

[0033] Examples of tetraester oils include tetra fatty acid esters of polyhydric alcohols having 4 or more valences, and specific examples thereof include pentaerythritol tetra(behenic acid / benzoic acid / ethylhexanoic acid), pentaerythritol tetraethylhexanoate, pentaerythritol tetraoctanoate, and pentaerythritol tetra-2-ethylhexanoate.

[0034] The ether oils include dialkyl ethers, specifically, dihexyl ether, dicaprylyl ether, cetyl-1,3-dimethylbutyl ether, and the like.

[0035] Examples of silicone oils include crosslinked methylpolysiloxane, network methylpolysiloxane, dimethylpolysiloxane, methyltrimethicone, dimethylcyclopolysiloxane, methylphenylpolysiloxanes such as diphenylsiloxyphenyltrimethicone, and higher alcohol-modified organopolysiloxanes.

[0036] Examples of higher alcohols include those having a straight or branched alkyl or alkenyl group having 10 to 24 carbon atoms, such as lauryl alcohol, myristyl alcohol, isocetyl alcohol, isostearyl alcohol, 2-octyldodecanol, and oleyl alcohol.

[0037] Among these, silicone oil and hydrocarbon oil are preferred, silicone oil is more preferred, and those containing dimethylpolysiloxane are even more preferred, from the viewpoints of excellent compatibility with components (B) and (C), forming a uniform film even after component (C) has evaporated after application to the skin, and suppressing color transfer to the mask.

[0038] Component (D) can be used alone or in combination of two or more, and the content is preferably 3% by mass or more in the total composition, more preferably 4% by mass or more, even more preferably 5% by mass or more, preferably 25% by mass or less, more preferably 22% by mass or less, and even more preferably 20% by mass or less, from the viewpoints of excellent compatibility with components (B) and (C), forming a uniform film even after component (C) volatilizes after application to the skin, and suppressing color transfer to the mask. The content of component (D) is preferably 3 to 25% by mass in the total composition, more preferably 4 to 22% by mass, and even more preferably 5 to 20% by mass.

[0039] In the present invention, the mass ratio (B) / (D) of component (B) to component (D) is 0.4 or more, preferably 0.5 or more, more preferably 0.7 or more, and is 2 or less, preferably 1.8 or less, and more preferably 1.6 or less, from the viewpoints of maintaining ease of spreading on the skin, excellent adhesion to spots where uneven skin tone is a concern such as acne scars, uniform application, resistance to unevenness and creasing, and suppression of color transfer to masks. The mass ratio (B) / (D) of component (B) to component (D) is 0.4 to 2, preferably 0.5 to 1.8, and more preferably 0.7 to 1.6.

[0040] In the present invention, the total content of components (B), (C) and (D) is preferably 20% by mass or more, more preferably 30% by mass or more, even more preferably 40% by mass or more, preferably 90% by mass or less, more preferably 70% by mass or less, and even more preferably 60% by mass or less, in order to maintain the ease of spreading on the skin, have excellent adhesion to spots on areas with uneven skin tone such as acne scars, and be applied uniformly. The total content of components (B), (C) and (D) is preferably 20 to 90% by mass, more preferably 30 to 70% by mass, and even more preferably 40 to 60% by mass, in the total composition.

[0041] In the present invention, the mass ratio (B) / ((C)+(D)) of component (B) to the total amount of components (C) and (D) is preferably 0.05 or more, more preferably 0.1 or more, even more preferably 0.2 or more, preferably 2 or less, more preferably 1 or less, and even more preferably 0.65 or less, from the viewpoints of maintaining ease of spread on the skin, excellent adhesion to spots on areas with uneven skin tone such as acne scars, uniform application, resistance to unevenness and creasing, and suppression of color transfer to masks. The mass ratio (B) / ((C)+(D)) of component (B) to the total amount of components (C) and (D) is preferably 0.05 to 2, more preferably 0.1 to 1, and even more preferably 0.2 to 0.65.

[0042] The water-in-oil emulsion cosmetic of the present invention may further contain an organically modified clay mineral, which can further improve adhesion to the skin. The organically modified clay mineral may be any one that is used in ordinary cosmetics without any limitation. For example, a cationic modified clay mineral obtained by treating a layered clay mineral such as bentonite, laponite, hectorite, montmorillonite, or magnesium aluminum silicate with a quaternary ammonium salt type cationic surfactant is preferred. Here, the quaternary ammonium salt type cationic surfactant is represented by the following formula (1):

[0043] [ka]

[0044] (In the formula, R 1 represents an alkyl group having 10 to 22 carbon atoms or a benzyl group, R 2 represents a methyl group or an alkyl group having 10 to 22 carbon atoms; 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 follows.

[0045] Specifically, dodecyl trimethyl ammonium chloride, myristyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, myristyl dimethyl ethyl ammonium chloride, cetyl dimethyl ethyl ammonium chloride, stearyl dimethyl ethyl ammonium chloride, behenyl dimethyl ethyl ammonium chloride, myristyl diethyl methyl ammonium chloride, cetyl diethyl methyl ammonium chloride, stearyl diethyl methyl ammonium chloride, behenyl diethyl methyl ammonium chloride, Examples of the above-mentioned compounds 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 compounds in which the chloride of each of the above-mentioned compounds is replaced with a bromide compound, and further examples thereof include dipalmityl propyl ethyl ammonium methyl sulfate. Of these, from the viewpoints of excellent adhesion to the skin and uniformity of the finish, benzyl dimethylstearyl ammonium chloride and dimethyl distearyl ammonium chloride are preferred, and it is preferable to contain at least dimethyl distearyl ammonium chloride.

[0046] As the cationic modified clay mineral obtained by treating the layered clay mineral with a quaternary ammonium salt type cationic surfactant, dimethyl distearyl ammonium hectorite, dimethyl distearyl ammonium bentonite, benzyl dimethyl stearyl ammonium hectorite, etc. are preferable, and dimethyl distearyl ammonium hectorite is more preferable. In addition, as a commercially available product, Benton 38, Benton 38VCG, Benton 27 (all manufactured by Elementis Specialties Co., Ltd.) etc. can be mentioned.

[0047] The organically 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 organic modified clay mineral is dispersed in a solvent in advance. The solvent is not limited as long as it can be thickened by the organic modified clay mineral, but from the viewpoint of the thickening effect of oil, octyl dodecanol, mineral oil, etc. are preferable. In addition, from the viewpoint of efficiently dispersing the organic modified clay mineral and expressing the thickening effect, it is preferable to contain polar additives such as propylene carbonate, ethanol, water, and various surfactants. The content of the organically 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%, from the viewpoints of improving workability, thickening effect of oil, and suppressing oil separation from the thickened oily gel itself. As the premix gel, commercially available products such as Bentone Gel EUGV, Bentone Gel MIOV, Bentone Gel ISDV, which contain 10% by mass of cation-modified clay minerals, Bentone Gel VS-5 PCV, which contains 18% by mass, and Bentone Gel PTM, which contains 15% by mass (all manufactured by Elementis Specialties, Inc.) can be used.

[0048] The organically modified clay mineral may be used alone or in combination of two or more, and the content is preferably 0.1% by mass or more in the total composition, more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, and preferably 5% by mass or less, more preferably 3% by mass or less, and even more preferably 2% by mass or less, from the viewpoint of improving adhesion to the skin. The content of the organically modified clay mineral is preferably 0.1 to 5% by mass in the total composition, more preferably 0.3 to 3% by mass, and even more preferably 0.5 to 2% by mass.

[0049] In the water-in-oil emulsion cosmetic of the present invention, from the viewpoint of maintaining ease of spread on the skin and obtaining a good feeling of use, the water content is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, and even more preferably 35% by mass or less, based on the total composition. The water content is preferably 5 to 50% by mass, more preferably 10 to 40% by mass, and even more preferably 15 to 35% by mass.

[0050] The water-in-oil emulsion cosmetic of the present invention may contain, in addition to the above-mentioned components, components that are usually used in cosmetics, such as oil components other than those mentioned above, surfactants, polymeric compounds other than those mentioned above, antioxidants, fragrances, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, germicides, skin activators, moisturizers, and cooling agents.

[0051] The water-in-oil emulsion cosmetic of the present invention can be produced according to a conventional method. The water-in-oil emulsion cosmetic of the present invention can be used, for example, as makeup cosmetics such as makeup base, foundation, concealer, blusher, eye shadow, mascara, eyeliner, eyebrow, overcoat agent, lipstick, etc.; ultraviolet protection cosmetics such as sunscreen lotion, sunscreen cream, etc. Among them, it is suitable as makeup cosmetics, and further as foundation and concealer. EXAMPLES

[0052] Production Example 1 (Production of N-propionylpolyethyleneimine-methylpolysiloxane copolymer) 12.9 g (0.13 mol) of 2-ethyl-2-oxazoline and 27.7 g of ethyl acetate were mixed, and the mixture was dehydrated with 2.0 g of molecular sieves (Zeorum A-4, manufactured by Tosoh Corporation) at 28° C. for 15 hours. In addition, 100 g of side chain primary aminopropyl modified polydimethylsiloxane (KF-8015, Shin-Etsu Silicones, weight average molecular weight 100,000, amine equivalent 20,000) was mixed with 203 g of ethyl acetate, and the mixture was dehydrated with 15.2 g of molecular sieves at 28°C for 15 hours. To the above-mentioned dehydrated 2-ethyl-2-oxazoline in ethyl acetate solution, 0.77 g (0.005 mol) of diethyl sulfate was added, and the mixture was heated under reflux at 80°C for 8 hours under a nitrogen atmosphere to synthesize terminal-reactive poly(N-propionylethyleneimine). The number average molecular weight measured by GPC was 2700. This terminally reactive poly(N-propionylethyleneimine) solution was added all at once to the above dehydrated side chain primary aminopropyl modified polydimethylsiloxane solution, and the mixture was heated to reflux at 80° C. for 10 hours. The reaction mixture was concentrated under reduced pressure to obtain N-propionylethyleneimine-dimethylsiloxane copolymer as a white rubbery solid (108 g). The mass ratio of the organopolysiloxane segment in the final product was 0.87, and the weight average molecular weight of the final product was 115,000.

[0053] Examples 1 to 5 and Comparative Examples 1 to 4 A water-in-oil emulsion cosmetic (concealer) was produced with the composition shown in Table 1, and was evaluated for ease of spreading on the skin, adhesion to the skin, uniformity of the applied cosmetic, resistance to unevenness during application, resistance to creasing after application, and lack of color transfer when wearing a mask. The results are also shown in Table 1.

[0054] (Production method) The powder phase components including component (A) were mixed and ground, added to the oil phase components including the separately mixed components (B), (C), and (D), and dispersed with a disperser. The aqueous phase components were then added, dispersed with a disperser, and stirred with a homomixer to obtain a water-in-oil emulsion cosmetic (concealer).

[0055] (Evaluation method) Five expert panelists applied each water-in-oil emulsion cosmetic (concealer) to the skin and evaluated it based on the following criteria: ease of spreading on the skin, adhesion to the skin, uniformity of the applied cosmetic, difficulty of unevenness during application, difficulty of creasing after application, and lack of color transfer when wearing a mask. The results are shown as the cumulative scores of the five panelists.

[0056] (1) Ease of spreading on the skin: 5;Very stretchy. 4;Good stretchability. 3; Slightly stretchy. 2: The stretch is not very good. 1: It doesn't stretch well.

[0057] (2) Skin Adhesion: 5; The makeup stays in place and adheres well, not spreading at all. 4; The makeup stays in place and adheres well, with very little diffusion. 3; The makeup product stays in place and adheres to the skin rather than spreading out too much. 2; The makeup does not stay in one spot but spreads a little. 1; The makeup doesn't stay in one spot, it spreads.

[0058] (3) Uniformity of applied cosmetics: 5; Very even adhesion. 4: Uniform adhesion. 3: Fairly uniform adhesion. 2: Not very evenly adhered. 1: Not evenly adhered.

[0059] (4) Less unevenness during application: 5;No unevenness. 4;It doesn't have much unevenness. 3: Slightly uneven application. 2;It becomes uneven. 1: It becomes quite uneven.

[0060] (5) Resistance to creasing after application: 5;There is absolutely no makeup smudging. 4;No smudging of makeup. 3; My makeup doesn't smudge much. 2: The makeup is slightly creased. 1;The makeup is smudged.

[0061] (6) No color transfer when wearing a mask: 5;No color transfer. 4;There is little color transfer. 3: There is some color transfer. 2;There is color transfer. 1: There is a lot of color transfer.

[0062] [Table 1]

[0063] Examples 6 to 9 The water-in-oil emulsion cosmetic (concealer) having the composition shown in Table 2 was produced in the same manner as in Examples 1 to 5, and was easy to spread onto the skin, had excellent adhesion to the skin, was uniformly applied, was less likely to become uneven during application, was less likely to crumble after application, and was less likely to transfer color when wearing a mask.

[0064] [Table 2]

Claims

1. The following components (A), (B), (C), and (D): (A) Powder, (B) Silicone-based film-forming agent: 5 to 25% by mass, (C) Volatile oils, (D) Non-volatile oil It contains, The mass ratio of component (B) to component (C), (B) / (C), is between 0.27 and 0.

8. An oil-in-oil emulsion cosmetic in which the mass ratio (B) / (D) of component (B) to component (D) is 0.4 to 2.

2. The water-in-oil emulsion cosmetic composition according to claim 1, wherein the content of component (A) is 5 to 30% by mass, the content of component (C) is 10 to 50% by mass, and the content of component (D) is 3 to 25% by mass.

3. The water-in-oil emulsion cosmetic composition according to claim 1 or 2, wherein component (C) is one or more selected from volatile silicone oils and volatile hydrocarbon oils.

4. The water-in-oil emulsion cosmetic composition according to claim 1 or 2, wherein component (D) is one or more selected from silicone oils and hydrocarbon oils.

5. The water-in-oil emulsion cosmetic composition according to claim 1 or 2, wherein the mass ratio (B) / ((C)+(D)) of component (B) to the total amount of components (C) and (D) is 0.05 to 2.

6. Furthermore, the water-in-oil emulsion cosmetic composition according to claim 1 or 2, further containing an organically modified clay mineral.

7. A water-in-oil emulsion cosmetic according to claim 1 or 2, which is a makeup cosmetic.