Water-in-oil emulsion cosmetic

Abstract

To provide a water-in-oil cosmetic that is applied to skin to evenly adhere to the skin furrows and ridges, and gives the skin a natural gloss and a finish with a three-dimensional look, and thickness and silkiness.SOLUTION: A water-in-oil emulsion cosmetic contains following components (A), (B) and (C): (A) a vinyl polymer having a carbosiloxane dendrimer structure in a side chain, (B) 0.1-20 mass% of a nonvolatile chain silicone oil, (C) 0.1-10 mass% of a phenyl-modified silicone oil.SELECTED DRAWING: None

Description

Technical Field

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

Background Art

[0002] It is known that a vinyl polymer having a carbosiloxane dendrimer structure in its side chain forms a strong cosmetic film when blended and used in a cosmetic, and improves the cosmetic durability such as sebum resistance and abrasion resistance. For example, Patent Document 1 describes a water-in-oil emulsion cosmetic containing a vinyl polymer having a carbosiloxane dendrimer structure in its side chain, a non-volatile oil agent, and a hydrophobically treated powder, which has good cosmetic durability and is less likely to cause unevenness such as fine wrinkles and pores and sagging over time.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, conventional cosmetics have the problem that although they are excellent in durability by using a vinyl polymer having a carbosiloxane dendrimer structure in its side chain and a non-volatile chain silicone oil in combination, they lack naturalness in the finish and do not feel glossy.

Means for Solving the Problems

[0005] The inventors of the present invention have found that when a vinyl polymer having a carbosiloxane dendrimer structure in its side chain is used in combination with a non-volatile chain silicone oil and a phenyl-modified silicone oil, when applied to the skin, it adheres uniformly to the skin grooves and skin mounds, gives the skin a natural gloss, and provides a finished product in which the skin looks three-dimensional and has a thick and smooth finish, and an oil-in-water type cosmetic can be obtained.

[0006] The present invention relates to an oil-in-water type emulsified cosmetic containing the following components (A), (B) and (C): (A) A vinyl polymer having a carbosiloxane dendrimer structure in its side chain (B) 0.1 to 20% by mass of a non-volatile chain silicone oil, (C) 0.1 to 10% by mass of a phenyl-modified silicone oil and relates to an oil-in-water type emulsified cosmetic containing the same.

Effect of the Invention

[0007] When the oil-in-water type emulsified cosmetic of the present invention is applied to the skin, it adheres uniformly to the skin grooves and skin mounds, gives the skin a natural gloss, and provides a finished product in which the skin looks three-dimensional and has a thick and smooth finish. Here, the finished product in which the skin looks three-dimensional means that the gloss area spreads widely on the convex portions of the skin, and the three-dimensional shape of the face is more emphasized. In addition, the thick and smooth finish means that since the makeup coating film covers the skin grooves, it appears to have a smooth finish with covering power.

Mode for Carrying Out the Invention

[0008] In the vinyl polymer having a carbosiloxane dendrimer structure in its side chain as component (A) used in the present invention, as the carbosiloxane dendrimer structure, a group represented by the following formula (1) is preferable.

[0009]

Chemical formula

[0010] In the formula, Z is a divalent organic group, p is 0 or 1, and R 1 is an alkyl group or an aryl group having 1 to 10 carbon atoms. X 1 is a silylalkyl group represented by the following formula when i = 1.

[0011]

Chemical formula

[0012] In the formula, R 1 is the same as described above, R 2 is an alkylene group having 2 to 10 carbon atoms, R 3 is an alkyl group having 1 to 10 carbon atoms, X i+1 is a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group, and the above silylalkyl group. i is an integer of 1 to 10 indicating the hierarchy of the silylalkyl group, and a i is an integer of 0 to 3.

[0013] In formula (1), Z is a divalent organic group, and examples thereof include an alkylene group, an arylene group, an aralkylen group, an ester-containing divalent organic group, an ether-containing divalent organic group, a ketone-containing divalent organic group, and an amide group-containing divalent organic group. Among these, an organic group represented by the following formula is preferable.

[0014]

Chemical formula

[0015] In the formula, R 9 is an alkylene group having 1 to 10 carbon atoms, and examples thereof include a methylene group, an ethylene group, a propylene group, and a butylene group. Among these, an ethylene group and a propylene group are preferable. R 10 is an alkyl group having 1 to 10 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, and a butyl group. Among these, a methyl group is preferable. R 11is an alkylene group having 1 to 10 carbon atoms, and examples of the alkylene group include a methylene group, an ethylene group, a propylene group, a butylene group and the like. Among these, an ethylene group is preferable. d is an integer of 0 to 4, and e is 0 or 1.

[0016] In the formula (1), R 1 is an alkyl group or an aryl group having 1 to 10 carbon atoms. Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, an isopropyl group, an isobutyl group, a cyclopentyl group and a cyclohexyl group. Examples of the aryl group include a phenyl group and a naphthyl group. Among these, a methyl group and a phenyl group are preferable, and a methyl group is particularly preferable. X 1 is a silylalkyl group represented by the following formula when i = 1.

[0017]

Chemical formula

[0018] In the formula, R 1 is the same as described above. R 2 is an alkylene group having 2 to 10 carbon atoms, and examples thereof include linear alkylene groups such as an ethylene group, a propylene group, a butylene group and a hexylene group; and branched alkylene groups such as a methylmethylene group, a methylethylene group, a 1-methylpentylene group and a 1,4-dimethylbutylene group. Among these, an ethylene group, a methylethylene group, a hexylene group, a 1-methylpentylene group and a 1,4-dimethylbutylene group are preferable. R 3 is an alkyl group having 1 to 10 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group and an isopropyl group. X i+1 is a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group and the above silylalkyl group. a i is an integer of 0 to 3. i is an integer of 1 to 10, which indicates the number of layers of the silylalkyl group, that is, the number of repetitions of the silylalkyl group.

[0019] As the vinyl polymer of component (A), 0 to 99.9 parts by mass of vinyl monomers other than (A1) and (A2) and 100 to 0.1 parts by mass of a carbosiloxane dendrimer having a radically polymerizable organic group represented by the general formula (2):

[0020] [Chemical formula]

[0021] (wherein Y is a radically polymerizable organic group, and R 1 and X 1 are the same as described above.) A vinyl polymer containing a carbosiloxane dendrimer structure obtained by (co)polymerizing is preferred.

[0022] In the above formula, Y is a radically polymerizable organic group, and R 1 is an alkyl group or an aryl group having 1 to 10 carbon atoms. Examples of the alkyl group include methyl group, ethyl group, propyl group, butyl group, pentyl group, isopropyl group, isobutyl group, cyclopentyl group, and cyclohexyl group. Examples of the aryl group include phenyl group and naphthyl group. Among these, a methyl group and a phenyl group are preferred, and a methyl group is particularly preferred.

[0023] In this vinyl polymer, the vinyl monomer of component (A1) may be any one having a radically polymerizable vinyl group, and its type and the like are not particularly limited. Examples of such vinyl monomers include lower alkyl (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, n-hexyl (meth) acrylate, and cyclohexyl (meth) acrylate; higher alkyl (meth) acrylates such as 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, lauryl (meth) acrylate, and stearyl (meth) acrylate; fatty acid vinyl esters such as vinyl acetate, vinyl propionate, vinyl butyrate, vinyl caproate, vinyl 2-ethylhexanoate, vinyl laurate, and vinyl stearate; aromatic-containing monomers such as styrene, vinyltoluene, benzyl (meth) acrylate, and phenoxyethyl (meth) acrylate; amide group-containing vinyl monomers such as (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, isobutoxymethoxy (meth) acrylamide, N,N-dimethyl (meth) acrylamide, vinylpyrrolidone, and N-vinylacetamide; hydroxyl group-containing vinyl monomers such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, glyceryl (meth) acrylate, and hydroxyethyl acrylamide; carboxylic acid-containing vinyl monomers such as (meth) acrylic acid, itaconic acid, crotonic acid, fumaric acid, and maleic acid and their salts; ether bond-containing vinyl monomers such as tetrahydrofurfuryl (meth) acrylate, butoxyethyl (meth) acrylate, ethoxydiethylene glycol (meth) acrylate, polyethylene glycol (meth) acrylate, polypropylene glycol mono (meth) acrylate, hydroxybutyl vinyl ether, cetyl vinyl ether, and 2-ethylhexyl vinyl ether; reactive group-containing monomers such as glycidyl (meth) acrylate, (meth) allyl glycidyl ether, methacryloyloxyethyl isocyanate, and (meth) acryloxypropyltrimethoxysilane;Macromonomers such as polydimethylsiloxane containing a (meth)acrylic group at one end and polydimethylsiloxane containing a styryl group at one end; butadiene; vinyl chloride; vinylidene chloride; (meth)acrylonitrile; dibutyl fumarate; maleic anhydride; radical polymerizable unsaturated monomers having a sulfonic acid group such as styrenesulfonic acid and acrylamide-2-methylpropanesulfonic acid, and their alkali metal salts, ammonium salts, and organic amine salts; quaternary ammonium salts derived from (meth)acrylic acid such as 2-hydroxy-3-methacryloxypropyltrimethylammonium chloride; methacrylic acid esters of alcohols having a tertiary amino group such as diethylaminoethyl methacrylate, vinylpyridine, and their quaternary ammonium salts, etc. are exemplified.;

[0024] Also, polyfunctional vinyl monomers can also be used. For example, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, ethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane trioxyethyl (meth)acrylate, tris(2-hydroxyethyl)isocyanurate di(meth)acrylate, tris(2-hydroxyethyl)isocyanurate tri(meth)acrylate, unsaturated group-containing silicone compounds such as styryl group-capped polydimethylsiloxane, etc. are exemplified.;

[0025] The carbosiloxane dendrimer of component (A2) may be any one having a radically polymerizable organic group represented by the general formula (2), and its type and the like are not particularly limited. In the general formula (2), Y is a radically polymerizable organic group, and any organic group capable of radical reaction may be used. Specifically, (meth)acryloxy group-containing organic groups, (meth)acrylamide group-containing organic groups, styryl group-containing organic groups, alkenyl groups having 2 to 10 carbon atoms, etc. represented by the following general formula are exemplified.;

[0026]

Chem.

[0027] (In the formula, R 4 and R 6 are a hydrogen atom or a methyl group, R 5 and R 8 are an alkylene group having 1 to 10 carbon atoms, and R 7 is an alkyl group having 1 to 10 carbon atoms. b is an integer of 0 to 4, and c is 0 or 1.)

[0028] Examples of such a radically polymerizable organic group include a 2-acryloyloxyethyl group, a 3-acryloyloxypropyl group, a 2-methacryloyloxyethyl group, a 3-methacryloyloxypropyl group, a 4-vinylphenyl group, a 3-vinylphenyl group, a 4-(2-propenyl)phenyl group, a 3-(2-propenyl)phenyl group, a 2-(4-vinylphenyl)ethyl group, a 2-(3-vinylphenyl)ethyl group, a vinyl group, an allyl group, a methallyl group, and a 5-hexenyl group.

[0029] In general formula (2), when i = 1, that is, when the number of layers of the silylalkyl group is 1, the carbosiloxane dendrimer of component (A2) has the general formula:

[0030]

Chem.

[0031] (In the formula, Y, R 1 , R 2 and R 3 are the same as described above, R 12 is a hydrogen atom or the same as the above R 1 . a 1 is the same as the above a i , but the average total number of a 1 in one molecule is 0 to 7.) It is represented by Examples of the carboxy dendrimer (A2) containing such a radically polymerizable organic group include carbosiloxane dendrimers represented by the following average composition formula.

[0032] [Chemical formula]

[0033] [Chemical formula]

[0034] Such carbosiloxane dendrimers can be produced, for example, according to the production methods described in JP-A-11-1530 and JP-A-2000-63225.

[0035] In the vinyl polymer containing the dendrimer structure used in the present invention, the mass ratio of the above components (A1) and (A2) is preferably (A1):(A2)=0:100 to 99.9:0.1, more preferably 5:95 to 90:10, and further preferably in the range of 10:90 to 80:20.

[0036] The number average molecular weight of the vinyl polymer having a carbosiloxane dendrimer structure of the component (A) used in the present invention is preferably 3,000 to 2,000,000, more preferably 5,000 to 800,000, from the viewpoint of ease of formulation as a cosmetic raw material. Further, its property may be liquid, gum-like, paste-like, solid-like, etc. at normal temperature, but a solid one is preferred from the viewpoint of the durability of the obtained cosmetic film. Also, from the viewpoint of compatibility, a solution or dispersion diluted with a solvent is preferred.

[0037] As the vinyl polymer having a carbosiloxane dendrimer structure in the side chain, a silicone dendrimer-acrylic copolymer is particularly preferable, and commercially available products such as FA4001CM (decamethylcyclopentasiloxane solution), FA4002ID (isododecane solution), FA4003DM (40% by mass dimethylpolysiloxane 2 cs solution) (the above are manufactured by Toray Dow Corning Co., Ltd.) can be used.

[0038] Component (A) can be used by combining one or more kinds, and the content is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 1% by mass or more, still more preferably 2% by mass or more, preferably 30% by mass or less, more preferably 20% by mass or less, further preferably 10% by mass or less, and still more preferably 7% by mass or less in the total composition from the viewpoint of excellent covering power and forming a cosmetic coating film from the skin papillae to the skin grooves of the skin. Also, the content of component (A) is preferably 0.01 to 30% by mass, more preferably 0.1 to 20% by mass, further preferably 1 to 10% by mass, and still more preferably 2 to 7% by mass in the total composition.

[0039] Component (B) is a non-volatile chain silicone oil and does not contain component (C). As the non-volatile chain silicone oil of component (B), those having a viscosity of 5 cs or more at 25 ° C are mentioned, and linear or branched silicone oils are included. Non-volatile means that when 1 g of the oil agent is spread in a glass petri dish with a diameter of 48 mm and left at 25 ° C and normal pressure for 24 hours, the mass reduction rate is 1% or less. Among these, linear silicone is preferable, and dimethylpolysiloxane is more preferable. The viscosity of the non-volatile silicone oil at 25 ° C is preferably 5 mPa·s or more, more preferably 6 mPa·s or more, preferably 50000 mPa·s or less, more preferably 10000 mPa·s or less, and further preferably 3000 mPa·s or less. As the dimethylpolysiloxane, it preferably contains at least dimethylpolysiloxane (6 mPa·s). The viscosity here is measured at 25°C using a B-type viscometer (TVB-10 model, manufactured by Toki Sangyo Co., Ltd., measurement conditions: rotor TM1 to TM4, 6 rpm, 1 minute). For viscosity measurements of 30 to 1000 mPa·s, TM1 is used; for 1000 to 5000 mPa·s, TM2 is used; for 5000 to 20000 mPa·s, TM3 is used; and for 20000 to 100000 mPa·s, TM4 is used.

[0040] Component (B) can be used alone or in combination of two or more. From the perspective of enhancing the durability of the coating film, the content is 0.1% by mass or more in the total composition, preferably 1% by mass or more, more preferably 3% by mass or more, still more preferably 5% by mass or more, and 20% by mass or less, preferably 16% by mass or less, more preferably 12% by mass or less, and still more preferably 10% by mass or less. Also, the content of component (B) is 0.1 to 20% by mass in the total composition, preferably 1 to 16% by mass, more preferably 3 to 12% by mass, and still more preferably 5 to 10% by mass.

[0041] As the phenyl-modified silicone oil of component (C), a phenyl-modified silicone that is liquid at 25°C is preferred. Being liquid means that the viscosity at 25°C is 4000 mPa·s or less. The viscosity at 25°C of the phenyl-modified silicone that is liquid at 25°C is preferably 600 mPa·s or less, more preferably 200 mPa·s or less, and still more preferably 50 mPa·s or less. Here, the viscosity is measured at 25°C using a B-type viscometer (TVB-10 model, manufactured by Toki Sangyo Co., Ltd.), rotor No. 4, 60 rpm, for 60 seconds.

[0042] Examples of the phenyl-modified silicone that is liquid at 25°C include phenyltrimethicone, diphenylsiloxyphenyltrimethicone, methylphenylpolysiloxane, diphenyldimethylsilicone, trimethylsiloxyphenyldimethylsilicone, trimethylpentaphenyltrisiloxysane, etc. Among these, from the viewpoint of promoting the phase separation of the cosmetic coating film during application, giving the skin a natural gloss, and obtaining a finish where the skin looks three-dimensional, it is preferable to contain at least one or two or more selected from diphenylsiloxyphenyltrimethicone, diphenyldimethylsilicone, and trimethylpentaphenyltrisiloxane.

[0043] As component (C), as phenyltrimethicone, SH556 Fluid (manufactured by Toray Dow Corning); as diphenylsiloxyphenyltrimethicone, KF-56A (manufactured by Shin-Etsu Chemical Co., Ltd.); as methylphenylpolysiloxane, DOWSIL FZ-209 (manufactured by Dow Toray); as diphenyldimethylsilicone, KF-50 (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-53 (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-54P (manufactured by Shin-Etsu Chemical Co., Ltd.); as trimethylsiloxyphenyldimethylsilicone, PDM-1000 (manufactured by Asahi Kasei Wacker Silicone); as trimethylpentaphenyltrisiloxysane, PH-1555 HRI Cosmetic Fluid (manufactured by Toray Dow Corning) and other commercially available products can be used.

[0044] Component (C) can be used in combination of one or two or more, and the content is 0.1% by mass or more in the total composition, preferably 0.3% by mass or more, more preferably 0.5% by mass or more, 10% by mass or less, preferably 6% by mass or less, more preferably 4% by mass or less, and still more preferably 2% by mass or less from the viewpoint of promoting the phase separation of the cosmetic coating film during application, giving the skin a natural gloss, and obtaining a finish where the skin looks three-dimensional. Further, the content of component (C) is 0.1 to 10% by mass in the total composition, preferably 0.1 to 6% by mass, more preferably 0.3 to 4% by mass, and still more preferably 0.5 to 2% by mass.

[0045] In the present invention, by using components (A), (B) and (C) in combination, by appropriately controlling the phase separation of the cosmetic coating film, it is considered to contribute to the improvement of the finish, such as the effects of the present invention, a finish where the skin feels a natural gloss and the skin looks three-dimensional, a thick and smooth finish.

[0046] In the present invention, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.5 or more, more preferably 1 or more, still more preferably 2 or more, preferably 20 or less, more preferably 10 or less, and still more preferably 7 or less from the viewpoint of obtaining a finish in which a natural gloss is felt on the skin, the skin looks three-dimensional, and a thick and smooth finish is obtained. Further, the mass ratio (A) / (C) of component (A) to component (C) is preferably 0.5 to 20, more preferably 1 to 10, and still more preferably 2 to 7.

[0047] In the present invention, the mass ratio (B) / (C) of component (B) to component (C) is preferably 1 or more, more preferably 2 or more, still more preferably 4 or more, even more preferably 6 or more, preferably 30 or less, more preferably 20 or less, still more preferably 15 or less, and even more preferably 12 or less from the viewpoint of obtaining a finish in which a natural gloss is felt on the skin, the skin looks three-dimensional, and a thick and smooth finish is obtained. Further, the mass ratio (B) / (C) of component (B) to component (C) is preferably 1 to 30, more preferably 2 to 20, still more preferably 4 to 15, and even more preferably 6 to 12.

[0048] In the present invention, the mass ratio (A) / ((B)+(C)) of component (A) to the total amount of components (B) and (C) is preferably 0.1 or more, more preferably 0.2 or more, still more preferably 0.3 or more, preferably 10 or less, more preferably 3 or less, still more preferably 2 or less, and even more preferably 1 or less from the viewpoint of uniformly adhering to the skin grooves and skin projections of the skin, obtaining a finish in which a natural gloss is felt on the skin, the skin looks three-dimensional, and a thick and smooth finish is obtained. Further, the mass ratio (A) / ((B)+(C)) of component (A) to the total amount of components (B) and (C) is preferably 0.1 to 10, more preferably 0.1 to 3, still more preferably 0.2 to 2, and even more preferably 0.3 to 1.

[0049] The water-in-oil type emulsified cosmetic of the present invention can further contain (D) ester oil, which can enhance the followability between the coating film and the skin, uniformly adhere to the skin grooves and skin mounds of the skin, and improve the finish. Such ester oil is not limited as long as it is used in ordinary cosmetics, and non-volatile ester oil is preferred. Further, the ester oil preferably has fluidity and is liquid or paste-like at 25°C.

[0050] Examples of such ester oils include monoester oils such as isononyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, tricyclodecanemethyl isononanoate, hexyl laurate, octyldodecyl malate, cetyl 2-ethylhexanoate, 2-hexyldecyl 2-ethylhexanoate, isopropyl myristate, 2-hexyldecyl myristate, octyldodecyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, ethyl isostearate, isopropyl isostearate, isobutyl isostearate, 2-hexyldecyl isostearate, 2-ethylhexyl hydroxystearate, octyldodecyl oleate, oleyl oleate, octyldodecyl ricinoleate, octyl paramethoxycinnamate, and propylene carbonate; diester oils such as di-2-ethylhexyl succinate, bisethoxydiglycol succinate, propane diol di(caprylic / capric acid), neopentyl glycol diisononanoate, neopentyl glycol dicaprate, glyceryl diisostearate, polyglyceryl diisostearate, propane diol diisostearate, diisostearyl malate, di(phytosteryl / octyldodecyl) lauroyl glutamate, di(cholesteryl / behenyl / octyldodecyl) lauroyl glutamate, di(octyldodecyl / phytosteryl / behenyl) lauroyl glutamate, neopentyl glycol di-2-ethylhexanoate, and neopentyl glycol dioctanoate; triester oils such as trimethylolpropane triisostearate, glyceryl triisostearate, diglyceryl triisostearate, jojoba oil, trimethylolpropane tri-2-ethylhexanoate, glyceryl tri-2-ethylhexanoate, glyceryl tri(caprylic / capric acid), glyceryl trioctanoate, tritridecyl trimellitate, macadamia nut oil, olive oil, castor oil, jojoba oil, avocado oil, and sunflower oil; and tetraester oils such as pentaerythrityl tetraoctanoate, diglyceryl tetraisostearate, dipentaerythrityl tetraisostearate, and pentaerythritol tetraisostearate.

[0051] Among these, from the viewpoint of obtaining a finish in which the skin feels a natural luster and looks three-dimensional, a monoester oil is preferable, a monoester oil having a branched structure is more preferable, and ethylhexyl paramethoxycinnamate and isononyl isononanoate are even more preferable.

[0052] Component (D) can be used alone or in combination of two or more. From the viewpoint of improving the finish, the content is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, even more preferably 1% by mass or more, preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 7% by mass or less, and even more preferably 5% by mass or less in the total composition. Further, the content of component (D) is preferably 0.1 to 20% by mass, more preferably 0.3 to 15% by mass, still more preferably 0.5 to 7% by mass, and even more preferably 1 to 5% by mass in the total composition.

[0053] In the present invention, the mass ratio (A) / ((B)+(C)+(D)) of component (A) to the total amount of components (B), (C) and (D) adheres uniformly to the skin grooves and skin mounds of the skin, gives the skin a natural luster, and provides a finish in which the skin looks three-dimensional. From the viewpoint of obtaining a thick and smooth finish, it is preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.2 or more, preferably 5 or less, more preferably 2 or less, and still more preferably 0.9 or less. Further, the mass ratio (A) / ((B)+(C)+(D)) of component (A) to the total amount of components (B), (C) and (D) is preferably 0.05 to 5, more preferably 0.1 to 2, and still more preferably 0.2 to 0.9.

[0054] The water-in-oil emulsion cosmetic of the present invention can further contain (E) a volatile oil. By uniformly dissolving components (A), (B), (C) and (D) and volatilizing them when applied to the skin, it can adhere uniformly to the skin grooves and skin mounds of the skin and improve the finish. In the volatile oil of component (E), volatility means having a flash point of 35 to 87°C. As the volatile oil, any oil that can be used in ordinary cosmetics may be used, and one or more selected from volatile silicone oils and volatile hydrocarbon oils are preferable, and volatile silicone oils are more preferable.

[0055] Examples of the volatile silicone oil include linear dimethylpolysiloxanes such as hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), dimethylpolysiloxane (1.5 cs), dimethylpolysiloxane (2 cs); branched siloxanes such as methyltrimethicone, tris(trimethylsilyl)methylsilane, tetrakis(trimethylsilyl)silane; cyclic dimethylsiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and the like. Among these, from the viewpoint of uniformly adhering to the skin grooves and skin mounds of the skin and giving a natural gloss, linear dimethylpolysiloxanes and branched siloxanes are preferable, and those containing one or more of hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), dimethylpolysiloxane (1.5 cs), dimethylpolysiloxane (2 cs), and methyltrimethicone are more preferable, and those containing at least one or more of hexamethyldisiloxane (dimethylpolysiloxane (0.65 cs)), octamethyltrisiloxane (dimethylpolysiloxane (1 cs)), dimethylpolysiloxane (1.5 cs), and dimethylpolysiloxane (2 cs) are even more preferable. Examples of the volatile hydrocarbon oil include paraffinic hydrocarbon oils such as n-decane, n-undecane, and n-dodecane; isoparaffinic hydrocarbon oils such as isodecane, isododecane, and hydrogenated polyisobutene (trimer); and cyclic paraffinic hydrocarbon oils such as cyclodecane and cyclododecane. Among these, from the viewpoint of uniformly adhering to the skin grooves and skin mounds and giving a natural gloss, isoparaffinic hydrocarbon oils are preferred, isoparaffinic hydrocarbon oils having 8 to 16 carbon atoms are more preferred, isoparaffinic hydrocarbon oils having 10 to 12 carbon atoms are even more preferred, and those containing at least isododecane are even more preferred.

[0056] As the volatile oil of component (E), from the viewpoint of uniformly adhering to the skin grooves and skin mounds and giving a natural gloss, it is preferably one or more selected from isododecane, dimethylpolysiloxane having a kinematic viscosity of 2 cs or less at 25°C, and decamethylcyclopentasiloxane. The kinematic viscosity can be measured using, for example, an Ubbelohde viscometer.

[0057] Component (E) can be used in combination of one or more kinds, and the content is preferably 1% by mass or more in the total composition, more preferably 10% by mass or more, even more preferably 15% by mass or more, even more preferably 18% by mass or more, preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, and even more preferably 25% by mass or less, from the viewpoint of uniformly adhering to the skin grooves and skin mounds and giving a natural gloss. Further, the content of component (E) is preferably 1 to 50% by mass in the total composition, more preferably 10 to 40% by mass, even more preferably 15 to 30% by mass, and even more preferably 18 to 25% by mass.

[0058] The water-in-oil type emulsified cosmetic of the present invention can further contain a surfactant, has excellent usability, and can suppress unevenness. The surfactant is not limited as long as it is used in ordinary cosmetics, but nonionic surfactants are preferred from the viewpoint of excellent usability and suppression of unevenness. Examples of nonionic surfactants include 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 phytosterol ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, alkyl glyceryl ether-modified silicone, polyether-modified silicone, polyoxyalkylene-alkyl copolymer-modified silicone, polyoxyalkylene-fluoroalkyl copolymer-modified silicone, and the like.

[0059] Among these, from the viewpoint of enhancing the dispersion and solubility of water and water-soluble components in oil, silicone-based surfactants are preferred, and those containing polyether-modified silicone are more preferred. Examples of polyether-modified silicone include commercially available products such as SH3771M, SH3772M, SH3773M, SH3775M, SH3749, DC5200 (manufactured by Toray Dow Corning Co., Ltd.), KF-6011, KF-6012, KF-6013, KF-6015, KF-6016, KF6017, KF-6004 (manufactured by Shin-Etsu Chemical Co., Ltd.), etc.

[0060] From the viewpoint of enhancing the dispersion and solubility of water and water-soluble components in oil, the HLB value of the nonionic surfactant is preferably 1 or more and 7 or less, and more preferably 2 or more and 6 or less.

[0061] 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 is determined by the Griffin's formula. The HLB of a mixed surfactant composed of two or more nonionic surfactants is determined as follows. The HLB of the mixed surfactant is the weighted average sum of the HLB values of each nonionic surfactant based on its blending ratio.

[0062] 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 the value of HLBx

[0063] The nonionic surfactant can be used alone or in combination of two or more. From the viewpoint of excellent usability and suppressing unevenness, the content is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 0.2% by mass or more, still more preferably 0.3% by mass or more, preferably 7% by mass or less, more preferably 5% by mass or less, further preferably 3% by mass or less, and still more preferably 1% by mass or less in the total composition. Also, the content of the nonionic surfactant is preferably 0.01 to 7% by mass, more preferably 0.1 to 5% by mass, further preferably 0.2 to 3% by mass, and still more preferably 0.3 to 1% by mass in the total composition.

[0064] The oil-in-water emulsion cosmetic of the present invention can further contain a hydrophobized powder. The powder is not limited as long as it is used in ordinary cosmetics, and extender pigments, coloring pigments, pearlescent pigments, etc. can be used. Examples of extender pigments include inorganic pigments such as silicic acid, silicic anhydride, magnesium silicate, talc, sericite, boron nitride, mica, synthetic mica, glass flakes, synthetic phlogopite, kaolin, clay, bentonite, bismuth oxychloride, zirconium oxide, magnesium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, aluminum silicate, magnesium silicate, silica, alumina, and composite powders thereof.

[0065] Examples of coloring pigments include metal oxides such as titanium oxide, zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, ultramarine blue, ultramarine, chromium oxide, chromium hydroxide; metal complexes such as manganese violet, cobalt titanate; further inorganic pigments such as carbon black; synthetic organic pigments 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, Blue No. 404; and natural organic pigments such as β-carotene, caramel, paprika pigment.

[0066] Examples of bright pigments include those obtained by coating the surfaces of plate-like powders such as mica, synthetic phlogopite, glass, silica, alumina with colorants such as titanium oxide, iron oxide, silicon oxide, ultramarine blue, chromium oxide, tin oxide, chromium hydroxide, gold, silver, carmine, organic pigments, etc., and those obtained by cutting film blanks such as polyethylene terephthalate / polymethyl methacrylate laminated powder, polyethylene terephthalate / aluminum vapor-deposited powder, polyethylene terephthalate / gold vapor-deposited laminated powder into arbitrary shapes can be used. Furthermore, 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 polyfluoroethylene; 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.

[0067] Examples of the hydrophobization treatment of these powders include silicone treatment, fluorine treatment, fatty acid treatment, and N-acyl amino acid treatment. Examples of the silicone treatment include methyl hydrogen polysiloxane treatment, dimethyl polysiloxane treatment, and alkyl alkoxysilane treatment. Examples of the fluorine treatment include perfluoroalkyl phosphate ester treatment and perfluoroalkyl alkoxysilane treatment. Examples of the fatty acid treatment include stearic acid treatment and myristic acid treatment. Examples of the N-acyl amino acid treatment include lauroyl lysine treatment, dilauroyl glutamic acid lysine Na treatment, stearoyl glutamic acid 2Na treatment, and lauroyl aspartic acid Na treatment. From the viewpoint of enhancing the dispersibility in oil, silicone treatment is preferred as the hydrophobization treatment, and methyl hydrogen polysiloxane treatment, dimethyl polysiloxane treatment, and alkyl alkoxysilane treatment are more preferred. The hydrophobization treatment can be carried out by ordinary methods.

[0068] The hydrophobized powder preferably contains a hydrophobized colored pigment. The hydrophobically treated powder can be used alone or in combination of two or more kinds, and the content is preferably 1% by mass or more, more preferably 10% by mass or more, still more preferably 20% by mass or more, preferably 50% by mass or less, more preferably 40% by mass or less, and still more preferably 30% by mass or less in the whole composition from the viewpoint of finishing the skin with a beautiful makeup effect. Further, the content of the hydrophobically treated powder is preferably 1 to 50% by mass, more preferably 10 to 40% by mass, and still more preferably 20 to 30% by mass in the whole composition.

[0069] In the present invention, from the viewpoint of excellent usability, the water content is preferably 1% by mass or more, more preferably 10% by mass or more, still more preferably 15% by mass in the whole composition, preferably 60% by mass or less, more preferably 45% by mass or less, and still more preferably 35% by mass or less. Further, the water content is preferably 1 to 60% by mass, more preferably 10 to 45% by mass, and still more preferably 15 to 35% by mass in the whole composition.

[0070] In addition to the above components, the water-in-oil type emulsified cosmetic of the present invention can contain components usually used in cosmetics, for example, oil components other than the above, powders other than the above, water-soluble polymers, antioxidants, fragrances, pigments, preservatives, ultraviolet absorbers, thickeners, pH adjusters, blood circulation promoters, cooling agents, antiperspirants, bactericides, skin activators, moisturizers, cooling agents, etc.

[0071] The water-in-oil type emulsified cosmetic of the present invention can be produced by a usual method. Further, it can be made into dosage forms such as liquid, emulsion liquid, paste, cream, gel, solid, etc. The water-in-oil type emulsified cosmetic of the present invention can be applied, for example, as makeup cosmetics such as makeup bases, foundations, concealers, blushes, eyeshadows, mascaras, eyeliners, eyebrows, overcoat agents, lipsticks; and sunscreen cosmetics such as sunscreen emulsions and sunscreen creams. It is suitable as a makeup cosmetic.

Examples

[0072] Examples 1 to 10 and Comparative Examples 1 to 3 An oil-in-water emulsion cosmetic (foundation) having the composition shown in Table 1 was produced, and its finish was evaluated for a natural glow felt on the skin (cheek), uniform adhesion to skin grooves and skin mounds, a three-dimensional appearance of the skin, and a thick and smooth finish. The results are shown together with Table 1.

[0073] (Production method) At 25°C, after adding and dispersing the powder component in the oil phase component containing components (A), (B), and (C), the aqueous phase component was added and stirred with a homomixer to produce an oil-in-water emulsion cosmetic.

[0074] (Evaluation method) (1) Feeling a natural glow on the skin (cheek): When each oil-in-water emulsion cosmetic was applied to the skin (cheek) by 5 professional evaluators, the sensory evaluation of the natural glow was carried out according to the following criteria. The results are shown as the total score of the 5 people. 5: Feeling a remarkably natural glow on the skin (cheek). 4: Feeling a natural glow on the skin (cheek). 3: Feeling a slightly unnatural glow on the skin (cheek). 2: Not feeling a very natural glow on the skin (cheek). 1: Not feeling any natural glow on the skin (cheek).

[0075] (2) Uniform adhesion to skin grooves and skin mounds: When each oil-in-water emulsion cosmetic was applied to the skin by 5 professional evaluators, the sensory evaluation of whether it adhered uniformly to the skin grooves and skin mounds was carried out according to the following criteria. The results are shown as the total score of the 5 people. 5: Adhering quite uniformly to skin grooves and skin mounds. 4: Adhering uniformly to skin grooves and skin mounds. 3: Adhering slightly uniformly to skin grooves and skin mounds. 2: Not adhering very uniformly to skin grooves and skin mounds. 1: Not adhering uniformly to skin grooves and skin mounds.

[0076] (3) A finish with a three-dimensional appearance of the skin: Five professional evaluators sensory-evaluated the three-dimensional finish of each water-in-oil emulsion cosmetic when applied to the skin according to the following criteria. The results are shown as the total scores of the five evaluators. 5; The skin looks quite three-dimensional. 4; The skin looks three-dimensional. 3; The skin looks somewhat three-dimensional. 2; The skin does not look very three-dimensional. 1; The skin does not look three-dimensional.

[0077] (4) A smooth and thick finish on the skin: Five professional evaluators sensory-evaluated whether each water-in-oil emulsion cosmetic had a smooth and thick finish on the skin according to the following criteria when applied to the skin. The results are shown as the total scores of the five evaluators. 5; It can be clearly seen that the finish is smooth and thick. 4; The finish looks smooth and thick. 3; The finish looks somewhat smooth and thick. 2; The finish does not look very smooth and thick. 1; The finish does not look smooth and thick.

[0078]

Table 1

[0079] Examples 11 and 12 In the same manner as in Examples 1 to 10, water-in-oil emulsion cosmetics (foundations) having the compositions shown in Table 2 were produced. When any of the obtained cosmetics was applied to the skin, it adhered uniformly to the skin grooves and ridges, a natural gloss was felt on the skin (cheek), the finish made the skin look three-dimensional, and a smooth and thick finish was obtained on the skin.

[0080]

Table 2

Claims

1. The following components (A), (B), (C), (D) and (E): (A) 1 to 7% by mass of a vinyl polymer having a carbosiloxane dendrimer structure in the side chain, (B) 3 to 20% by mass of a non-volatile dimethylpolysiloxane having a viscosity at 25°C of 6 mPa·s or more and 3000 mPa·s or less, (C) 0.3 to 2% by mass of a phenyl-modified silicone oil, (D) an ester oil, (E) a volatile oil containing, and the mass ratio (B) / (C) of component (B) to component (C) being 6 to 15, a water-in-oil type emulsified cosmetic.

2. In component (A), the carbosiloxane dendrimer structure is represented by the following formula (1) 【Chemical Formula 1】 {In the formula, Z is a divalent organic group, p is 0 or 1, and R 1 is an alkyl group or an aryl group having 1 to 10 carbon atoms. X 1 is a silylalkyl group represented by the following formula when i = 1. 【Chemical Formula 2】 (In the formula, R 1 is the same as above, R 2 is an alkylene group having 2 to 10 carbon atoms, R 3 is an alkyl group having 1 to 10 carbon atoms, X i+1 is a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group and the above silylalkyl group. i is an integer of 1 to 10 indicating the layer of the silylalkyl group, and a i is an integer of 0 to 3.)} The water-in-oil type emulsified cosmetic according to Claim 1, which is a group represented by

3. The vinyl polymer of component (A) is (A1) 0 to 99.9 parts by mass of a vinyl monomer and (A2) a general formula: 【Chemical Formula 3】 {In the formula, Y is a radically polymerizable organic group, and R 1 is an alkyl group or an aryl group having 1 to 10 carbon atoms, and X 1 is a silylalkyl group represented by the following formula when i = 1. [Chemical Formula 4] (In the formula, R 1 is the same as described above, R 2 is an alkylene group having 2 to 10 carbon atoms, R 3 is an alkyl group having 1 to 10 carbon atoms, X i+1 is a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group, and the above silylalkyl group. i is an integer of 1 to 10 indicating the hierarchy of the silylalkyl group, and a i is an integer of 0 to 3.)} An oil-in-water emulsion cosmetic according to claim 1 or 2, which is obtained by polymerizing 100 to 0.1 part by mass of a carbosiloxane dendrimer having a radically polymerizable organic group represented by the formula.

4. The radically polymerizable organic group Y in (A2) is an acrylic group or a methacrylic group-containing organic group represented by the general formula [Chemical Formula 5] (In the formula, R 4 is a hydrogen atom or a methyl group, and R 5 is an alkylene group having 1 to 10 carbon atoms.) or a styryl group-containing organic group represented by the general formula: [Chemical Formula 6] (In the formula, R 6 is a hydrogen atom or a methyl group, R 7 is an alkyl group having 1 to 10 carbon atoms, R 8 is an alkylene group having 1 to 10 carbon atoms, b is an integer of 0 to 4, and c is 0 or 1.) An oil-in-water emulsion cosmetic according to claim 3, which is a group selected from the group consisting of a styryl group-containing organic group and an alkenyl group having 2 to 10 carbon atoms represented by the formula.

5. The water-in-oil emulsion cosmetic according to any one of claims 1 to 4, wherein the component (C) is at least one or two or more selected from diphenylsiloxyphenyltrimethicone, diphenyldimethylsilicone, and trimethylpentaphenyltrisiloxane.

6. The water-in-oil emulsion cosmetic according to any one of claims 1 to 5, wherein the mass ratio (A) / (C) of the component (A) to the component (C) is 1 to 10.

7. The water-in-oil emulsion cosmetic according to any one of claims 1 to 6, wherein the content of the component (D) is 0.5 to 7% by mass.

8. The water-in-oil emulsion cosmetic according to any one of claims 1 to 7, wherein the content of the component (E) is 10 to 30% by mass.

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