Water-in-oil type emulsion cosmetic

Abstract

To provide a water-in-oil type emulsion cosmetic that causes less viscosity change at room temperature and high temperature even it is stored for a long period, no change in application feeling by temperature dependence, has soft application feeling when applied, is free of oily feeling or squeakiness, has excellent adhesiveness, and less powdery finish.SOLUTION: A water-in-oil type emulsion cosmetic contains the following components (A), (B), (C), (D) and (E): (A) organic modified clay mineral, (B) HLB6 or less of silicone surfactant, (C) 0.4 mass% or less of sorbitan fatty acid ester having HLB6 or less, (D) 0.1 to 20 mass% of extender pigment treated by acylated amino acid, and (E) volatile oil.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] Since the external phase of water-in-oil emulsion cosmetics is oily, it is easy to impart water resistance, and they are often used in emulsion-type foundations, sunscreens, etc. In addition, cosmetics that adhere well to the skin and provide a beautiful finish are being investigated. For example, Patent Document 1 describes that a water-in-oil emulsion cosmetic containing a cation-modified clay mineral, a hydrophobically treated color pigment, a phenyl-modified silicone, and a volatile oil adheres well to the skin, spreads lightly, is easy to apply, and gives the skin a thin, glossy feel and makes the skin surface appear evenly finished. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-70516 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, water-in-oil emulsion cosmetics containing cationically modified clay minerals, silicone surfactants, and volatile oils have an unstable gel structure and undergo viscosity changes due to temperature changes, which can lead to problems such as a poor feel when using the cosmetics and a powdery finish. [Means for solving the problem]

[0005] The present inventors have discovered that by combining a specific amount or less of a sorbitan fatty acid ester and an extender pigment treated with an acylated amino acid with a water-in-oil emulsion cosmetic containing a cationically modified clay mineral, a silicone surfactant, and a volatile oil, it is possible to obtain a water-in-oil emulsion cosmetic that has little change in viscosity at room temperature and at high temperatures even when stored for a long period of time, has no change in application feel due to temperature, is soft to the touch when applied, is free of an oily or squeaky feel, has good adhesion, and has a non-powdery finish.

[0006] The present invention comprises the following components (A), (B), (C), (D) and (E): (A) Organically modified clay minerals, (B) Silicone surfactants with an HLB value of 6 or less; (C) sorbitan fatty acid esters of HLB 6 or less, 0.4% by mass or less; (D) 0.1 to 20% by mass of an extender pigment treated with an acylated amino acid, (E) Volatile oil The present invention relates to a water-in-oil emulsion cosmetic comprising the above-mentioned compound. Effect of the Invention

[0007] The water-in-oil emulsion cosmetic of the present invention exhibits little change in viscosity at room temperature and at high temperatures even when stored for a long period of time, and the application feel does not change depending on temperature. In addition, the application feel is soft, there is no oily or squeaky feeling, the adhesiveness is good, and a non-powdery finish can be obtained. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The organically modified clay mineral of component (A) used in the present invention can be any one that is used in ordinary cosmetics without any restrictions. 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):

[0009] [ka]

[0010] (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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] The component (A) may be used alone or in combination of two or more, and the content is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more, based on the total composition, from the viewpoint of excellent adhesion to the skin and uniform finish, and is preferably 5% by mass or less, more preferably 3% by mass or less, and even more preferably 1.5% by mass or less. The content of component (A) is preferably 0.01 to 5% by mass, more preferably 0.05 to 3% by mass, and even more preferably 0.1 to 1.5% by mass, based on the total composition.

[0015] Component (B) is a silicone surfactant having an HLB of 6 or less. Examples of silicone surfactants include polyether-modified silicones such as polyoxyethylene-methylpolysiloxane copolymers and poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers; polyglycerin-modified silicones, alkyl-modified polyether-modified silicones, and alkyl-chain-co-modified polyether-modified silicones.

[0016] Polyether-modified silicones are silicones having a monovalent polyoxyalkyl group in their structure, and examples thereof include PEG-3 dimethicone, PEG-10 dimethicone, PEG-12 dimethicone, PEG-11 methyl ether dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, and cetyl PEG / PPG-10 / 1 dimethicone. The polyglycerin-modified silicone is a silicone having a monovalent polyglyceryl group in its structure, and examples thereof include polyglyceryl-3 disiloxane dimethicone and polyglyceryl-3 polydimethylsiloxyethyl dimethicone. Of these, from the viewpoint of enhancing the dispersibility of water and water-soluble components in oil, it is preferable to include one or more selected from polyether-modified silicones and alkyl-modified polyether-modified silicones.

[0017] Furthermore, from the viewpoint of improving the dispersibility of water and water-soluble components in oil, the silicone surfactant of component (B) has an HLB of 6 or less, preferably an HLB of 2 or more and 6 or less, and more preferably an HLB of 3 or more and 5 or less. Here, HLB (Hydrophilic-Lipophilic Balance) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and is calculated by Griffin's formula. When a surfactant is composed of two or more nonionic surfactants, the HLB of the mixed surfactant is calculated as follows. The HLB of the mixed surfactant is the phase arithmetic average of the HLB values ​​of each nonionic surfactant based on their blending ratio. Mixed HLB=Σ(HLBx×Wx) / ΣWx HLBx indicates the HLB value of nonionic surfactant X. Wx denotes the mass (g) of the nonionic surfactant X having a value of HLBx.

[0018] Examples of component (B) include polyoxyethylene-methylpolysiloxane copolymers such as KF-6015 (HLB4.5), KF-6017 (HLB4.5), KF-6028 (HLB4) (all manufactured by Shin-Etsu Chemical Co., Ltd.), and SH3775M (HLB5) (manufactured by Dow Corning Toray Co., Ltd.), poly(oxyethylene-oxypropylene)methylpolysiloxane copolymers such as DOWSIL BY 22-008 M (HLB2), DOWSIL BY 25-337 (HLB3), DOWSIL ES-5226 (HLB2), and DOWSIL ES-5227 (HLB2) (all manufactured by Dow Corning Toray Co., Ltd.), and alkyl-modified polyether-modified silicones such as KF-6038 (HLB3) (manufactured by Shin-Etsu Chemical Co., Ltd.), ABIL EM 90(HLB5) (manufactured by Evonik Co., Ltd.) or other commercially available products can be used.

[0019] Component (B) 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, and even more preferably 0.5% by mass or more, and is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less, from the viewpoint of improving the dispersibility of water and water-soluble components in oil. The content of component (B) is preferably 0.1 to 10% by mass in the total composition, more preferably 0.3 to 5% by mass, and even more preferably 0.5 to 3% by mass.

[0020] The component (C) used in the present invention is a sorbitan fatty acid ester having an HLB of 6 or less. The sorbitan fatty acid ester preferably has an HLB of 2 or more and 6 or less, and more preferably an HLB of 3 or more and 6 or less, from the viewpoints of suppressing changes in viscosity at room temperature and at high temperatures during long-term storage and preventing changes in the application feel due to temperature dependence. The HLB is the same as that of component (B).

[0021] Examples of sorbitan fatty acid esters include sorbitan monoisostearate, sorbitan monooleate, sorbitan sesquistearate, sorbitan sesquioleate, etc., and from the viewpoints of suppressing changes in viscosity at room temperature and high temperatures during long-term storage and not changing the application feel due to temperature, it is preferable to contain one or more types selected from sorbitan monoisostearate, sorbitan monooleate, and sorbitan sesquistearate, more preferably one or more types selected from sorbitan monoisostearate and sorbitan sesquistearate, and even more preferably sorbitan monoisostearate. Examples of sorbitan fatty acid esters that can be used as component (C) include commercially available products such as Span 120 (HLB 4.7) (manufactured by Croda) for sorbitan monoisostearate, NIKKOL SS-15V (HLB 4.2) for sorbitan sesquistearate, and NIKKOL SO-10V (HLB 4.3) for sorbitan monooleate (all manufactured by Nikko Chemicals).

[0022] Component (C) can be used alone or in combination of two or more types. From the viewpoints of suppressing changes in viscosity at room temperature and at high temperatures during long-term storage and preventing changes in the application feel due to temperature dependency, the content is 0.4 mass % or less, preferably 0.2 mass % or less, more preferably 0.1 mass % or less, and even more preferably substantially absent, of the total composition.

[0023] Component (D) is an extender pigment treated with an acylated amino acid. 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. Among these, it is preferable to contain at least talc, from the viewpoints of small change in viscosity at room temperature and at high temperatures during long-term storage, no change in application feel due to temperature dependence, a soft application feel upon application, suppression of an oily feel or squeaky feel, excellent adhesion, and obtaining a finish that is not powdery.

[0024] The extender pigment of component (D) is treated with an acylated amino acid by a conventional method. Examples of the amino acids constituting the acylated amino acid include proline, hydroxyproline, alanine, glycine, sarcosine, lysine, aspartic acid, glutamic acid, etc., and salts thereof are also included. The fatty acid constituting the acyl group of the acylated amino acid is preferably a fatty acid having 1 to 23 carbon atoms, more preferably a fatty acid having 8 to 20 carbon atoms, and among these, stearoyl glutamic acid, lauroyl aspartic acid, dilauroyl glutamic acid lysine, and lauroyl lysine are even more preferred. Examples of the salts thereof include Na, Ca, Al, Mg, Zn, Zr, and Ti salts. Specifically, from the viewpoints of having little change in viscosity at room temperature and at high temperatures during long-term storage, no change in application feel due to temperature dependence, a soft application feel when applied, suppression of oily feeling and squeaky feeling, excellent adhesion, and a finish without powderiness, those treated with disodium stearoyl glutamate, sodium lauroyl aspartate, etc. are preferred, and among these, those treated with disodium stearoyl glutamate are more preferred. Also, acylated amino acid treatment without dimethicone treatment is preferred. The content of component (D) means the mass including the agent treated with acylated amino acid.

[0025] One or more kinds of component (D) can be used, and the content is 0.1% by mass or more, preferably 0.2% by mass or more, more preferably 0.3% by mass or more, and 20% by mass or less, preferably 10% by mass or less, and more preferably 6% by mass or less, based on the viewpoints of obtaining little change in viscosity at room temperature and high temperature during long-term storage, no change in application feel due to temperature dependence, soft application feel when applied, suppression of oily feeling and squeaky feeling, excellent adhesion, and a finish without powderiness. The content of component (D) is 0.1 to 20% by mass, preferably 0.2 to 10% by mass, and more preferably 0.3 to 6% by mass, based on the total composition.

[0026] In the present invention, the mass ratio (A) / (D) of component (A) to component (D) is preferably 0.005 or more, more preferably 0.01 or more, even more preferably 0.03 or more, preferably 4 or less, more preferably 2 or less, and even more preferably 0.8 or less, from the viewpoints of obtaining little change in viscosity at room temperature and high temperatures during long-term storage, no change in application feel due to temperature dependence, a soft application feel when applied, suppression of oily feeling and squeaky feeling, excellent adhesion, and a finish without powderiness. The mass ratio (A) / (D) of component (A) to component (D) is preferably 0.005 to 4, more preferably 0.01 to 2, and even more preferably 0.03 to 0.8.

[0027] In the present invention, the mass ratio (B) / (D) of component (B) to component (D) is preferably 0.02 or more, more preferably 0.05 or more, even more preferably 0.1 or more, and is preferably 10 or less, more preferably 4 or less, and even more preferably 2 or less, from the viewpoints of obtaining little change in viscosity at room temperature and high temperatures during long-term storage, no change in application feel due to temperature dependence, a soft application feel upon application, suppression of oily feeling and squeaky feeling, excellent adhesion, and a finish without powderiness. Moreover, the mass ratio (B) / (D) of component (B) to component (D) is preferably 0.02 to 10, more preferably 0.05 to 4, and even more preferably 0.1 to 2.

[0028] In the volatile oil of component (E), volatile means that it has a flash point of 35 to 87°C. Volatile oils include volatile silicone oils and volatile hydrocarbon oils. Examples of volatile silicone oils include linear dimethylpolysiloxanes such as dimethylpolysiloxane (1cs), dimethylpolysiloxane (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. Of these, dimethylpolysiloxane (1cs), dimethylpolysiloxane (1.5cs), dimethylpolysiloxane (2cs), and methyltrimethicone are preferred.

[0029] 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. Among these, isoparaffinic hydrocarbon oils are preferred, and isododecane and hydrogenated polyisobutene having 12 carbon atoms are more preferred.

[0030] As the volatile oil of component (E), a volatile silicone oil is preferred from the viewpoints of suppressing an oily feeling or a squeaky feeling, providing excellent adhesion, and achieving a finish that is not powdery. Component (E) may be used alone or in combination of two or more, and the content is preferably 1% by mass or more, more preferably 20% by mass or more, even more preferably 25% by mass or more, preferably 50% by mass or less, preferably 45% by mass or less, and even more preferably 38% by mass or less, based on the viewpoint of suppressing oily feeling and squeaky feeling, and obtaining a finish with excellent adhesion and no powderiness, based on the total composition. The content of component (E) is preferably 1 to 50% by mass, more preferably 20 to 45% by mass, and even more preferably 25 to 38% by mass, based on the total composition.

[0031] In the emulsion cosmetic of the present invention, from the viewpoint of maintaining the emulsion form and providing an excellent feeling when used, 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 is preferably 60% by mass or less, more preferably 45% 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 60% by mass, more preferably 10 to 45% by mass, and even more preferably 15 to 35% by mass.

[0032] The water-in-oil emulsion cosmetic of the present invention may further contain a coloring pigment. 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, and it is even more preferred to include at least one or more selected from titanium oxide, yellow iron oxide, black iron oxide, and red iron oxide.

[0033] These color pigments may be used as they are, 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. Among these, from the viewpoints of excellent adhesion and excellent makeup effect, hydrophobization treatment using at least one or more treatments selected from silicone treatment, amino acid treatment, and acylated amino acid treatment is preferred. In addition, when the color pigment is used after being hydrophobized, the content of the color pigment means the mass including the agent used for the hydrophobization treatment.

[0034] The color pigment 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 1% by mass or more, and even more preferably 5% by mass or more, and is preferably 35% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less, from the viewpoint of excellent adhesion and excellent makeup effect. The content of the color pigment is preferably 0.1 to 35% by mass, more preferably 1 to 30% by mass, and even more preferably 5 to 20% by mass, in the total composition.

[0035] 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 other than those mentioned above, powders other than those mentioned above, polymeric compounds, antioxidants, fragrances, preservatives, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, germicides, skin activators, moisturizers, and cooling agents.

[0036] The water-in-oil emulsion cosmetic of the present invention can be produced according to a conventional method. From the viewpoint of excellent adhesion, the water-in-oil emulsion cosmetic of the present invention preferably has a viscosity at 30° C. of 1000 to 20000 mPa·s, and more preferably 1500 to 10000 mPa·s. In the present invention, the viscosity is measured using a Brookfield viscometer (TVB-10 model, manufactured by Toki Sangyo Co., Ltd.), rotor No. 3, 12 rpm, 30 seconds.

[0037] 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, and lipstick; and as ultraviolet protection cosmetics such as sunscreen lotion and sunscreen cream, and is suitable as a makeup cosmetic. EXAMPLES

[0038] Production Example 1 (Production of poly(N-propionylethyleneimine) modified silicone (Polysilicone 9)) 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.

[0039] Examples 1 to 8 and Comparative Examples 1 to 3 A water-in-oil emulsion cosmetic (foundation) with the composition shown in Table 1 was produced, and the viscosity was measured immediately after production and after two weeks of storage, and the soft feel when applied, the lack of oiliness, the lack of squeaky feeling, the good adhesion, and the lack of powderiness were evaluated. The results are also shown in Table 1.

[0040] (Production method) The powder phase components including component (D) were mixed and ground, added to the oil phase components including components (A), (B), (C), and (E) that had been mixed separately, and dispersed using a disperser. The aqueous phase components were then added, dispersed using a disperser, and stirred using a homomixer to obtain a water-in-oil emulsion cosmetic (foundation).

[0041] (Evaluation method) (1) Viscosity measurement: The viscosity of each water-in-oil emulsion cosmetic was measured immediately after production and after two weeks of storage at 30°C or 45°C using a B-type viscometer (TVB-10 model, manufactured by Toki Sangyo Co., Ltd.) with rotor No. 3 at 12 rpm for 30 seconds. The viscosity change rate (%) was also calculated from the viscosity immediately after production and the viscosity after two weeks of storage at 30°C or 45°C.

[0042] (2) Soft feel when applied: Three expert panelists evaluated the soft feel of each water-in-oil emulsion cosmetic (foundation) on the skin using the following criteria. The results were expressed as the total score given by the three panelists. 5;Very soft to the touch. 4;Soft feel. 3;Feels slightly soft. 2;Not very soft to the touch. 1;Not soft to the touch.

[0043] (3) Lack of oiliness: Three expert panelists evaluated the lack of oiliness of each water-in-oil emulsion cosmetic (foundation) when applied to the skin, using the following criteria. The results were expressed as the total score given by the three panelists. 5. Not oily at all. 4. Does not feel oily. 3;Not very oily. 2: Slightly oily feel. 1: Has an oily feel.

[0044] (4) No creaking sensation: Three expert panelists evaluated the absence of squeaky feeling when each water-in-oil emulsion cosmetic (foundation) was applied to the skin, using the following criteria. The results were shown as the total score given by the three panelists. 5;No squeaking sensation at all. 4;No squeaking sensation. 3;There isn't much squeaking. 2: There is a slight creaking sensation. 1;There is a creaking sensation.

[0045] (5) Good adhesion: Three expert panelists evaluated the adhesion of each water-in-oil emulsion cosmetic (foundation) to the skin after spreading it, using the following criteria. The results were shown as the total score given by the three panelists. 5;Very good. 4;Good. 3;Somewhat good. 2;Not very good. 1;Not good.

[0046] (6) Lack of powderiness: Three expert panelists evaluated the powderiness of each water-in-oil emulsion cosmetic (foundation) after spreading it on the skin, using the following criteria. The results were shown as the total score given by the three panelists. 5;Not powdery at all. 4;Not powdery. 3;Not too powdery. 2: Slightly powdery. 1;It is powdery.

[0047] [Table 1]

[0048] Example 9 Water-in-oil emulsion cosmetics (foundations) having the compositions shown in Table 2 were produced in the same manner as in Examples 1-8. The obtained water-in-oil emulsion cosmetic exhibits little change in viscosity at room temperature and at high temperatures even when stored for a long period of time, and the application feel does not change depending on temperature. In addition, the application feel is soft when applied, there is no oily or squeaky feeling, the cosmetic has good adhesion, and a non-powdery finish can be obtained.

[0049] [Table 2]

[0050] Example 10 Water-in-oil emulsion cosmetics (foundations) having the compositions shown in Table 3 were produced in the same manner as in Examples 1-8. The obtained water-in-oil emulsion cosmetic exhibits little change in viscosity at room temperature and at high temperatures even when stored for a long period of time, and the application feel does not change depending on temperature. In addition, the application feel is soft when applied, there is no oily or squeaky feeling, the cosmetic has good adhesion, and a non-powdery finish can be obtained.

[0051] [Table 3]

Claims

1. An oil-in-water emulsion cosmetic containing the following components (A), (B), (C), (D) and (E): (A) Organically modified clay mineral, (B) A silicone surfactant with an HLB of 6 or less, (C) Sorbitan fatty acid ester with an HLB of 6 or less at 0.4% by mass or less, (D) 0.1 to 20% by mass of a extender pigment treated with an acylated amino acid, (E) Volatile oil

2. The oil-in-water emulsion cosmetic according to Claim 1, wherein the mass ratio (A) / (D) of component (A) to component (D) is 0.005 to 4.

3. The oil-in-water emulsion cosmetic according to Claim 1, wherein the mass ratio (B) / (D) of component (B) to component (D) is 0.02 to 10.

4. The oil-in-water emulsion cosmetic according to Claim 2 or 3, wherein the content of component (A) is 0.01 to 5% by mass and the content of component (B) is 0.1 to 10% by mass.

5. The oil-in-water emulsion cosmetic according to Claim 2 or 3, having a viscosity at 30°C of 1000 to 20000 mPa·s.