Water-in-oil emulsion cosmetics

The water-in-oil emulsified cosmetic formulation, featuring silylated peptide-silane or amino acid-silane copolymers, specific surfactants, and selected oil agents, addresses the stability and stickiness issues of conventional cosmetics, delivering stable and effective skin care.

JP7657456B2Active Publication Date: 2025-04-07SEIWA KASEI CO JP
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Patent Information

Application Number
JP2021199001
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-08-16
Filing Date
2021-12-08
Publication Date
2025-04-07
Estimated Expiration
2041-12-08

AI Technical Summary

Technical Problem

Conventional water-in-oil emulsifying cosmetics using silylated peptide-silane compound copolymers or silylated amino acid-silane compound copolymers face issues with viscosity changes during storage and the occurrence of 'water spray' when applied to the skin, leading to instability and stickiness.

Method used

A water-in-oil emulsified cosmetic formulation comprising a silylated peptide-silane compound copolymer or a silylated amino acid-silane compound copolymer, a specific silicone or nonionic surfactant, and a selected oil agent, along with optional components like glycerin and glyceryl ascorbic acid, to enhance stability and skin care effects.

Benefits of technology

The formulation achieves excellent storage stability with minimal viscosity changes and provides a non-sticky, smooth application to the skin, while also offering moisturizing and antioxidant skin care benefits.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a water-in-oil emulsion cosmetic that does not cause the appearance of water droplets when applied to skin, has a good feeling of use, does not show separation or oil floating even during storage, and changes little in viscosity to offer excellent stability.SOLUTION: A water-in-oil emulsion cosmetic contains: a silylated peptide-silane compound copolymer or / and a silylated amino acid-silane compound copolymer; a specific silicone surfactant or a nonionic surfactant; and an oil solution selected from ester oil, silicone oil or hydrocarbon oil.SELECTED DRAWING: None
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Description

[Technical field]

[0001] The present invention relates to a water-in-oil emulsion cosmetic that has excellent storage stability and is less likely to be washed off when applied to the skin. More specifically, the present invention relates to a water-in-oil emulsion cosmetic that contains a silylated peptide-silane compound copolymer or a silylated amino acid-silane compound copolymer, a specific surfactant, and a specific oil. [Background technology]

[0002] Water-in-oil emulsion cosmetics are prepared using oil, water, and an emulsifier, but conventional emulsifiers used in water-in-oil emulsion cosmetics tend to cause stickiness when applied to the skin, and there has been a demand for water-in-oil emulsion cosmetics that are non-sticky and have an excellent feel when used. In addition, compared to oil-in-water emulsion cosmetics, water-in-oil emulsion cosmetics have the disadvantage that the dispersed phase (aqueous phase) is more likely to coalesce and separate over time, making it difficult to obtain a stable water-in-oil emulsion cosmetic, and a solution to this problem has been sought. Therefore, there has been a demand for a water-in-oil emulsifier that can produce a water-in-oil emulsion cosmetic that does not cause a sticky feeling when applied to the skin and has excellent stability over time.

[0003] Therefore, the present inventors have developed a silylated peptide-silane compound copolymer or a silylated amino acid-silane compound copolymer, which is obtained by condensation polymerization in an aqueous solution of one or more silylated peptides or silylated amino acids having two hydroxyl groups directly bonded to silicon atoms, and one or more silane compounds which generate two or more hydroxyl groups directly bonded to silicon atoms upon hydrolysis, as a water-in-oil emulsifier, and have proposed a water-in-oil emulsion cosmetic that is less sticky and has good stability over time (Patent Documents 1, 2, and 3).

[0004] However, in water-in-oil emulsion cosmetics containing silylated peptide-silane compound copolymer or silylated amino acid-silane compound copolymer as an emulsifier, depending on the type of oil, there is a problem that the viscosity changes during storage, which leads to a change in the feel when applied to the skin. In addition, when the cosmetic is spread thinly on the skin, the dispersed phase (aqueous phase) coalesces and water droplets appear (referred to as "water-dropping"), which may impair the feel when applied. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-048732 A [Patent Document 2] JP 2004-331616 A [Patent Document 3] JP 2017-132713 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention aims to solve the problems of the prior art and to provide a water-in-oil emulsion cosmetic that contains a silylated peptide-silane compound copolymer or a silylated amino acid-silane compound copolymer as an emulsifier, which is free from separation or oil floating during storage, has little change in viscosity and is excellent in stability, and is also unlikely to cause water runoff when applied to the skin, providing an excellent feel when used. [Means for solving the problem]

[0007] Means for Solving the Problems The present inventors have conducted intensive research in light of the above-mentioned circumstances, and have found that a water-in-oil emulsion cosmetic comprising component (A): a silylated peptide-silane compound copolymer or a silylated amino acid-silane compound copolymer, component (B): a silicone surfactant or a nonionic surfactant, and component (C): an oil selected from the group consisting of ester oil, silicone oil, and hydrocarbon oil, provides a cosmetic that exhibits little water removal when applied to the skin, has an excellent feel when used, and further has excellent storage stability, thereby completing the present invention.

[0008] The first aspect of the present invention is a water-in-oil emulsion cosmetic, (A) a compound represented by the following general formula (I):

[0009] [ka]

[0010] [In the formula, R 1 represents a hydroxyl group or an alkyl group having 1 to 3 carbon atoms, and R 2 represents the residue of the side chain of a basic amino acid having an amino group at the end of the side chain, excluding the terminal amino group, and R 3 is R 2 A is a bond and represents at least one group selected from the group consisting of -CH2-, -CH2CH2-, -CH2CH2CH2-, -(CH2)3OCH2CH(OH)CH2-, -(CH2)3S-, -(CH2)3NH- and -(CH2)3OCOCH2CH2-, x is 0 to 50, y is 1 to 100, and x+y is 1 to 100 (note that x and y only indicate the number of amino acids and do not indicate the order of the amino acid sequence. In addition, two R 1 may be the same or different.) The following general formula (II) R 4 m Si(OH) p Y (4-p-m) (II) [In the formula, m is an integer of 0 to 2, p is an integer of 2 to 4, m+p≦4, and R 4is an organic group in which a carbon atom is directly bonded to a silicon atom, and m R 4 (4-pm) Y's each represent an alkoxy group or a hydrogen atom; (B) a silicone surfactant or a nonionic surfactant, (C) an oil selected from ester oils, silicone oils, and hydrocarbon oils; and further characterized in that the mass ratio (B) / (A) of the component (B) to the component (A) is 0.01 or more and 1.0 or less.

[0011] The second aspect of the present invention is the water-in-oil emulsion cosmetic of the first aspect of the present invention, further comprising one or more components selected from the group consisting of glycerin, diglycerin, glyceryl ascorbic acid, and salts thereof as component (D). By incorporating component (D), the temporal stability of the water-in-oil emulsion cosmetic of the present invention is not impaired, and it is possible to impart preferable skin care effects when applied to the skin, such as moisturizing effects, antioxidant effects, melanin production inhibitory effects, and collagen production promoting effects. The second aspect of the present invention corresponds to this preferable embodiment.

[0012] The third aspect of the present invention is the water-in-oil emulsion cosmetic of the second aspect of the present invention, characterized in that the component (D) contains bisglyceryl ascorbic acid. From the viewpoint of the high usability when incorporated into the cosmetic, the component (D) is preferably bisglyceryl ascorbic acid, particularly 2,3-di-O-glyceryl ascorbic acid, and it is preferable to contain these. The third aspect of the present invention corresponds to this preferred embodiment.

[0013] The fourth aspect of the present invention is the water-in-oil emulsion cosmetic according to any one of the first to third aspects of the present invention, characterized in that component (B) is selected from the group consisting of polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, polyglyceryl-6 polyricinoleate, and polyglyceryl-2 dipolyhydroxystearate. By selecting the above-mentioned component (B) as the surfactant, it is possible to provide a water-in-oil emulsion cosmetic composition that is particularly excellent in terms of storage stability and the amount of water that is removed when applied to the skin. The fourth aspect of the present invention corresponds to this preferred embodiment.

[0014] The fifth aspect of the present invention is a water-in-oil emulsion cosmetic according to any one of the first to fourth aspects of the present invention, characterized in that component (C) is selected from the group consisting of caprylic / capric triglyceride, decamethylcyclopentasiloxane, dimethicone, squalane and mineral oil. By selecting the oil agent of component (C) from the above, the water-in-oil emulsion cosmetic of the present invention exhibits a more excellent feeling when used, which is preferable. The fifth aspect of the present invention corresponds to this preferable embodiment. Effect of the Invention

[0015] The present invention relates to a water-in-oil emulsion cosmetic that contains a silylated peptide-silane compound copolymer or a silylated amino acid-silane compound copolymer, a specific surfactant, and a specific oil, and is a cosmetic that has excellent stability with little change in viscosity during storage. In addition, when applied to the skin, it exhibits little water removal and an excellent feel when used. Furthermore, when the water-in-oil emulsion cosmetic of the present invention contains component (D): one or more selected from the group consisting of glycerin, diglycerin, glyceryl ascorbic acid, and salts thereof, the water-in-oil emulsion cosmetic is provided with favorable skin care effects when applied to the skin, such as moisturizing effects, antioxidant effects, melanin production inhibitory effects, and collagen production promoting effects, without compromising stability, and is also less sticky. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The components constituting the water-in-oil emulsion cosmetic of the present invention are component (A): a silylated peptide-silane compound copolymer or a silylated amino acid-silane compound copolymer, component (B): a silicone surfactant or a nonionic surfactant, and component (C): an oil selected from the group consisting of ester oils, silicone oils, and hydrocarbon oils, and further, component (D): one or more selected from the group consisting of glycerin, diglycerin, glyceryl ascorbic acid, and salts thereof, and the form of the water-in-oil emulsion cosmetic of the present invention are described in detail below.

[0017] [Component (A): silylated peptide-silane compound copolymer or silylated amino acid-silane compound copolymer] The silylated peptide-silane compound copolymer or silylated amino acid-silane compound copolymer of component (A) can be synthesized by the methods disclosed in Patent Documents 1 and 3.

[0018] Specifically, the copolymer can be synthesized by condensation polymerization of one or more silylated peptides or silylated amino acids represented by the general formula (I) with one or more silane compounds represented by the general formula (II) in an aqueous solution. The reaction molar ratio of the silylated peptides or silylated amino acids to the silane compounds is usually in the range of (silylated peptides or silylated amino acids):(silane compounds)=1:20 to 1:80. After the above-mentioned polycondensation, a compound represented by the following general formula (III): R 5 3Si(OH) (III) [Wherein, three R 5 is an organic group in which a carbon atom is directly bonded to a silicon atom, and three R 5 may be the same or different] in an aqueous solution, is also used as component (A) in the water-in-oil emulsion cosmetic of the present invention. As the component (A), one selected from the silylated peptide-silane compound copolymer and the silylated amino acid-silane compound copolymer may be used alone, or two or more of them may be used in combination.

[0019] The silylated peptide represented by the general formula (I) is represented by the formula R 1 The group represented by Si(OH)2A- is bonded to the amino group of a peptide, and examples of the peptide include natural peptides, synthetic peptides, protein hydrolysates, etc. Among them, protein hydrolysates are preferred because of their ease of availability and ease of control of the number-average molecular weight of the peptide portion.

[0020] The protein hydrolysate is a peptide obtained by partially hydrolyzing a protein with an acid, an alkali, an enzyme, or a combination thereof, and the protein source can be animal protein, vegetable protein, protein derived from a microorganism, etc. Examples of animal protein include collagen (including its modified product, gelatin), keratin, silk (fibroin or sericin), casein, conchiolin, elastin, protamine, egg yolk protein and egg white protein of eggs from chickens, etc. Examples of vegetable protein include proteins contained in soybeans, wheat, rice (rice bran), sesame, peas, corn, potatoes, etc. Examples of proteins derived from a microorganism include yeast fungi of the genus Saccharomyces, Candida, and Endomycopsis, yeast proteins isolated from yeast fungi called brewer's yeast and sake yeast, proteins isolated from mushrooms (basidiomycetes) and Chlorella, and spirulina protein derived from seaweed.

[0021] From the viewpoint of industrial availability, the silylated peptide of the silylated peptide-silane compound copolymer is preferably silylated hydrolyzed silk or silylated hydrolyzed collagen.

[0022] The silylated amino acid represented by the general formula (I) is one in which a group represented by the formula R1Si(OH)2A- is bonded to the amino group of an amino acid, and the amino acid is not particularly limited and may be any amino acid that is normally used in cosmetics. Any of acidic amino acids such as aspartic acid, glutamic acid, and cystic acid, neutral amino acids such as glycine, alanine, serine, threonine, methionine, cysteine, valine, leucine, isoleucine, phenylalanine, tyrosine, proline, hydroxyproline, tryptophan, asparagine, and glutamine, and basic amino acids such as arginine, lysine, histidine, and ornithine may be used.

[0023] From the viewpoint of high stability of the water-in-oil emulsion cosmetic of the present invention, the silylated amino acid of the silylated amino acid-silane compound copolymer is preferably silylated serine, silylated alanine, silylated arginine, silylated glycine, silylated proline, or silylated glutamic acid.

[0024] In order to obtain the water-in-oil emulsion cosmetic of the present invention, a commercially available product containing a silylated peptide-silane compound copolymer may be used to incorporate component (A). An example of such a commercially available product is Protesil WO ((hydrolyzed silk / PG propylmethylsilanediol) crosspolymer + hydrogenated polyisobutene + water) manufactured by Seiwa Kasei Co., Ltd.

[0025] The content of the component (A) is not particularly limited, but is preferably 0.4 to 3.5% by mass, and more preferably 0.8 to 2.5% by mass, based on the total mass of the emulsion cosmetic. If the content is less than this, it may not be possible to exert a sufficient effect as an emulsifier, and if the content is greater than this, sufficient effect commensurate with the cost will not be observed.

[0026] [Component (B): Silicone surfactant or nonionic surfactant] The silicone surfactant or nonionic surfactant of component (B) contained in the water-in-oil emulsion cosmetic of the present invention is not particularly limited as long as it is one that is usually used in cosmetics.

[0027] Examples of the silicone surfactant include PEG-11 methyl ether dimethicone, PEG / PPG-20 / 22 butyl ether dimethicone, PEG-9 dimethicone, PEG-3 dimethicone, PEG-9 methyl ether dimethicone, PEG-10 dimethicone, PEG-32 methyl ether dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, methylpolysiloxane cetyl methylpolysiloxane, and methylpolysiloxane cetyl methylpolysiloxane. Examples of modified silicones include polyether-modified silicones such as polysiloxane-poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer, poly(oxyethylene-oxypropylene)methylpolysiloxane copolymer, and (dimethicone / (PEG-10 / 15)) crosspolymer; polyglycerin-modified silicones such as polyglyceryl-3 polydimethylsiloxyethyl dimethicone and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone; and dimethylsiloxane-methylcetylsiloxane copolymer.

[0028] Examples of the nonionic surfactant include polyglycerin fatty acid esters such as polyglyceryl-2 dipolyhydroxystearate, PEG-30 dipolyhydroxystearate, polyglyceryl-6 polyricinoleate, polyglyceryl-6 laurate, and polyglyceryl-2 isostearate; alkyl glucosides such as decyl glucoside, caprylyl / capryl glucoside, cetearyl glucoside, arachidyl glucoside, (C12-20) alkyl glucoside, coconut oil alkyl glucoside, myristyl glucoside, heptyl glucoside, and lauryl glucoside; sorbitan monolaurate, sorbitol ... Examples of suitable fatty acids include sorbitan fatty acid esters such as sorbitan monopalmitate; glycerin fatty acid esters and their alkylene oxide adducts, polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene alkylphenols, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene alkylphenyl formaldehyde condensates, polyoxyethylene sterol and derivatives thereof, polyoxyethylene lanolin and derivatives thereof, polyoxyethylene beeswax derivatives, sucrose fatty acid esters, polyoxyethylene hydrogenated castor oil, and polyoxyethylene castor oil.

[0029] Among the silicone surfactants of the component (B), polyether-modified silicone or polyglycerin-modified silicone is preferred from the viewpoint of small viscosity change during storage, and among them, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone are preferred. As the nonionic surfactant, polyglycerin fatty acid ester is preferred, and among them, polyglyceryl-2 dipolyhydroxystearate and polyglyceryl-6 polyricinoleate are preferred. The surfactant of component (B) can be used alone or in combination of two or more kinds.

[0030] The content of the component (B) is not particularly limited, but is preferably 0.05 to 2 mass% and more preferably 0.1 to 1.5 mass% relative to the total mass of the emulsion cosmetic. If the content is less than this, the storage stability of the emulsion cosmetic may decrease, and if it is more than this, sufficient effects commensurate with the increased content may not be obtained.

[0031] The mass ratio of component (B) to component (A) [component (B) / component (A)] is 1.0 or less, more preferably 0.7 or less, from the viewpoint of storage stability of the water-in-oil emulsion cosmetic. If the mass ratio of component (B) to (A) is greater than this range, the feeling of use when applied to the skin may be impaired, or it may be difficult to prepare a stable water-in-oil emulsion cosmetic. On the other hand, the mass ratio [component (B) / component (A)] is 0.01 or more, more preferably 0.1 or more. If the mass ratio is less than this range, the effect of blending component (B) is often not sufficiently obtained.

[0032] [Component (C): Oil] The oil agent of component (C) contained in the water-in-oil emulsion cosmetic of the present invention is selected from ester oil, silicone oil, and hydrocarbon oil, and among these, any oil that is usually used in cosmetics can be used without any particular limitation.

[0033] Ester oils include diisopropyl adipate, diisobutyl adipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, alkyl glycol monoisostearate, isocetyl isostearate, isostearyl isostearate, isopropyl isostearate, propylene glycol isostearate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, neopentyl glycol di-2-ethylhexanoate, and tri-2-ethylhexanoate. Trimethylolpropane, erythrityl triethylhexanoate, 2-ethylhexyl hydroxystearate, dipentaethylhexyl hexa(hydroxystearic acid / stearic acid / rosin acid), dipentaerythrityl tetra(hydroxystearic acid / isostearic acid), dipentaerythrityl hexahydroxystearate, glyceryl ethylhexanoate / stearic acid / adipic acid, pentaerythritol tetra-2-ethylhexanoate, pentaerythritol tetraoctanoate, pentaerythrityl tetraisostearate, 2-ethyl Cetyl hexanoate, oleyl oleate, octyldodecyl oleate, ethyl oleate, decyl oleate, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, myristyl lactate, isopropyl palmitate, cetyl palmitate, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, dipentaerythritol fatty acid esther Terephthalate, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, isopropyl palmitate, 2-octyldodecyl myristate, 2-hexyldecyl myristate, myristyl myristate, octyldodecyl myristate, hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, 2-ethylhexyl methoxycinnamate, diisostearyl malate, dipentaerythrityl hexa(behenate / benzoate / ethylhexanoate), alkyl benzoate (C12-15), glyceryl triisooctanoate,Examples of the glyceryl triisostearate include glyceryl diisostearate, diglyceryl triisostearate, diglyceryl tetraisostearate, decaglyceryl decaisostearate, glyceryl triisopalmitate, glyceryl trimyristate, diglyceryl myristate isostearate, tritridecyl trimellitate, tri(caprylic acid / capric acid), glyceryl tri-2-ethylhexanoate, tri(caprylic acid / capric acid / myristic acid / stearic acid), N-lauroyl-L-glutamic acid-2-octyldodecyl ester, and di(phytostearyl / 2-octyldodecyl) N-lauroyl-L-glutamate.

[0034] Examples of silicone oils include dimethyl silicone oils such as methyl polysiloxane, dimethyl polysiloxane (dimethicone), and highly polymerized methyl polysiloxane; methyl phenyl silicone oils such as methyl phenyl polysiloxane; cyclic silicone oils such as methyl cyclopolysiloxane, octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane, and dodecamethyl cyclohexasiloxane; amino-modified silicones such as aminopropyl methyl siloxane-dimethyl siloxane copolymer, aminoethyl aminopropyl methyl siloxane-dimethyl siloxane copolymer, and aminoethyl aminopropyl methyl siloxane-dimethyl siloxane copolymer; modified silicones such as carboxy-modified silicone, alkoxy-modified silicone, fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone, and alkyl-modified silicone; methyl hydrogen polysiloxane, dimethiconol, and the like.

[0035] Examples of hydrocarbon oils include (C13-15) alkanes, (C15-19) alkanes, (C18-21) alkanes, (C21-28) alkanes, mineral oil, liquid paraffin, light isoparaffin, light liquid isoparaffin, heavy liquid isoparaffin, α-olefin oligomers, squalane, synthetic squalane, vegetable squalane, hydrogenated polyisobutene, hydrogenated (tetradecenyl / methylpentadecene), isododecane, polybutene, polyisobutene, isohexadecane, (C13,14) isoparaffin, and petrolatum.

[0036] Of the above-mentioned component (C), tri(caprylic / capric acid)glyceryl, decamethylcyclopentasiloxane, dimethicone, mineral oil, and squalane are preferably used from the viewpoint of good skin compatibility and non-stickiness when applied to the skin. The oil agent of component (C) may be used alone or in combination of two or more.

[0037] The content of the component (C) is not particularly limited, but is preferably 10 to 30% by mass, and more preferably 15 to 25% by mass, based on the total mass of the emulsion cosmetic. If the content is less than this range, the storage stability of the emulsion cosmetic may decrease, and if the content is more than this range, the feeling of use may be affected, such as increased stickiness.

[0038] [Component (D): one or more selected from the group consisting of glycerin, diglycerin, glyceryl ascorbic acid, and salts thereof] (Glycerin, diglycerin) The glycerin and diglycerin of component (D) contained in the water-in-oil emulsion cosmetic of the present invention are not particularly limited as long as they are components normally used in cosmetics, and commercially available products can be used. Specific examples include concentrated glycerin for cosmetics and diglycerin 801 manufactured by Sakamoto Pharmaceutical Co., Ltd.

[0039] The content of glycerin and diglycerin is preferably 5 to 50% by mass, and more preferably 10 to 30% by mass, based on the total mass of the cosmetic. If the content is less than this range, the moisturizing effect may be insufficient when applied to the skin, and if the content is more than this range, the stability over time of the cosmetic may decrease.

[0040] (Glyceryl ascorbate and its salts) The glyceryl ascorbate as component (D) contained in the water-in-oil emulsion cosmetic of the present invention is an ascorbic acid derivative in which one or more glyceryl groups are added to the 2-, 3-, 5-, or 6-position of ascorbic acid, and specific examples include the compounds shown below. In the following examples, glyceryl refers to a group represented by HOCH2-CH(OH)-CH2- or HOCH2-CH(CH2OH)-. Alkyl refers to a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl group, a heptadecyl group, an octadecyl group, a nonadecyl group, an eicosyl group, a behenyl group, or the like. Alkenyl refers to a vinyl group, an allyl group, a butenyl group, an isobutenyl group, a crotyl group, an octenyl group, a decenyl group, a dodecenyl group, etc. Acyl refers to a formyl group, an acetyl group, a propionyl group, a butyryl group, a pentanoyl group, a hexanoyl group, a heptanoyl group, an octanoyl group, a nonyl group, a decanoyl group, an undecanoyl group, a dodecanoyl group, a tetradecanoyl group, a hexadecanoyl group, an eicosanoyl group, a hexadecenoyl group, an octadecenoyl group, an octadecatrienoyl group, an icosatetraenoyl group, an isooctanoyl group, an isopalmitoyl group, an isostearoyl group, a 2-propylpentanoyl group, a 2-butylhexanoyl group, a 2-pentylheptanoyl group, and the like.

[0041] Glyceryl ascorbic acid includes 2-O-glyceryl ascorbic acid, 3-O-glyceryl ascorbic acid, 5-O-glyceryl ascorbic acid, 6-O-glyceryl ascorbic acid, 2,3-di-O-glyceryl ascorbic acid, 2,3,5,6-tetra-O-glyceryl ascorbic acid, 2-O-diglyceryl ascorbic acid, 3-O-diglyceryl ascorbic acid, 2,3-di-O-diglyceryl ascorbic acid, 2-O-glyceryl-3-O-alkyl ascorbic acid, 2-O Examples of such as glyceryl ascorbic acid include 2-O-alkyl-3-O-glyceryl ascorbic acid, 2-O-alkyl glyceryl ascorbic acid, 3-O-alkyl glyceryl ascorbic acid, 2-O-glyceryl-5-O-acylascorbic acid, 2-O-glyceryl-6-O-acylascorbic acid, 2-O-glyceryl-3-O-alkenyl ascorbic acid, 2-O-alkenyl-3-O-glyceryl ascorbic acid, 2-O-alkenyl glyceryl ascorbic acid, and 3-O-alkenyl glyceryl ascorbic acid.

[0042] Among the above examples, glyceryl ascorbic acid that is easily available industrially and can fully exhibit the effects of the present invention is preferably 2-O-glyceryl ascorbic acid, 3-O-glyceryl ascorbic acid, or bisglyceryl ascorbic acid, and among these, bisglyceryl ascorbic acids such as 2,3-di-O-glyceryl ascorbic acid are more preferred.

[0043] Examples of salts of glyceryl ascorbic acid include metal salts such as potassium salts and sodium salts, and ammonium salts such as triethanolamine salts, 2-amino-2-methyl-1,3-propanediol salts, and 2-amino-2-methyl-1-propanol salts.

[0044] As the glyceryl ascorbic acid, commercially available products can be used. For example, Amitose DGA manufactured by Seiwa Kasei Co., Ltd. can be used as the 2,3-di-O-glyceryl ascorbic acid.

[0045] In the water-in-oil emulsion cosmetic of the present invention, one selected from the group consisting of glycerin, diglycerin, glyceryl ascorbic acid, and salts thereof may be used alone, or two or more may be used in combination.

[0046] The content of glyceryl ascorbic acid or a salt thereof is preferably 0.1 to 30% by mass, more preferably 0.5 to 25% by mass, based on the total mass of the cosmetic. If the content of glyceryl ascorbic acid or a salt thereof is less than this range, it becomes difficult to obtain a desirable skin care effect. On the other hand, if the content is more than this range, the effect commensurate with the increase in the amount blended is not obtained.

[0047] The water-in-oil emulsion cosmetic of the present invention may contain water in addition to the above-mentioned components (A) to (D). Furthermore, as long as the effect and stability of the water-in-oil emulsion cosmetic are not impaired, other components such as those normally used in cosmetics may be appropriately contained depending on the intended use.

[0048] For example, other ingredients that are typically used in cosmetics, such as surfactants other than component (B), oily ingredients other than component (C), moisturizers, polymeric compounds such as thickeners, whitening agents, texture improvers, drugs, UV absorbers, proteins, protein hydrolysates or derivatives thereof, amino acids or derivatives thereof, antioxidants, sequestering agents, pH adjusters, preservatives, pigments, colorants, and fragrances, may be appropriately blended as other ingredients.

[0049] Surfactants other than component (B) include anionic surfactants such as higher fatty acid soaps, alkyl sulfates, alkyl phosphates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl phenyl ether sulfates, alkyl ether phosphates, alkyl ether carboxylates, acyl methyl taurines, N-acyl-N-methyl-β-alanines, N-acyl glycines, N-acyl glutamates, polyoxyethylene alkyl carboxylates, alkyl phenyl ether sulfonates, alkyl sulfosuccinic acids and their salts, N-acyl sarcosines and their salts, polyoxyethylene coconut oil fatty acid monoethanolamide sulfates, lauroyl oat amino acids and their salts, and cocoyl apple amino acids and their salts; alkylamine salts such as monoalkylamine salts, dialkylamine salts, and trialkylamine salts; fatty acid amide alkylamines such as stearamidoethyl diethylamine and stearamidopropyl dimethylamine; alkyl quaternary ammonium salts such as monoalkyl quaternary ammonium salts, dialkyl quaternary ammonium salts, trialkyl quaternary ammonium salts, and benzalkonium quaternary ammonium salts; cyclic quaternary ammonium salts such as alkylpyridinium salts; cationic surfactants such as benzethonium chloride, Examples of amphoteric surfactants include alkyl dimethyl amino acetate betaine, alkyl amido amino acetate betaine, fatty acid amido propyl dimethyl amino acetate betaine, 2-alkyl-N-carboxy-N-hydroxy imidazolinium betaine, alkyl glycine salts, carboxymethyl glycine salts, N-acyl aminoethyl-N-2-hydroxyethyl glycine salts, alkyl amino propionate salts, alkyl imino dipropionate salts, and alkyl hydroxy sulfobetaine.

[0050] Examples of oil components other than component (C) include vegetable oils, waxes, higher fatty acids, higher alcohols, and fats and oils.

[0051] Examples of vegetable oils include macadamia nut oil, eucalyptus oil, coconut oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea butter, cocoa butter, almond oil, sunflower oil, rosehip oil, olive squalane, camellia oil, kiwi fruit seed oil, camellia oil, apricot kernel oil, sesame oil, soybean oil, jojoba oil, castor oil, hazelnut oil, meadowfoam oil, peppermint oil, argan oil, carrot oil, lavender oil, sugar squalane, damask rose flower wax, centifolia rose flower wax, jasmine flower wax, camellia oil, and hydrogenated versions of these oils (e.g., hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated avocado oil, hydrogenated soybean oil, etc.).

[0052] Examples of waxes include carnauba wax, candelilla wax, beeswax, rice bran wax, shellac wax, spermaceti, lanolin, lanolin acetate, isopropyl lanolinate, lanolin alcohol, and sunflower seed wax.

[0053] Examples of higher fatty acids include isostearic acid, oleic acid, lauric acid, myristic acid, palmitic acid, and stearic acid.

[0054] Examples of higher alcohols include cetyl alcohol, stearyl alcohol, behenyl alcohol, cetearyl alcohol, myristyl alcohol, octanol, lauryl alcohol, oleyl alcohol, isostearyl alcohol, octyldodecanol, hexyldecanol, arachidyl alcohol, (C14-22) alcohol, (C20-22) alcohol, coconut alcohol, glyceryl monocetyl ether, decyltetradecanol, and batyl alcohol.

[0055] Examples of fats and oils include Theobroma grandiflorum seed fat, mango seed fat, cocoa butter, palm oil, palm kernel oil, coconut oil, shea butter, Shorea sthenoptera fat, African mango kernel fat, avocado fat, sal seed fat, Astrocaryum murumuru fat, Astrocaryum murumuru seed fat, Astrocaryum tucuma seed fat, Garcinia indica seed fat, Tritilia emetica seed fat, Bassia latifolia seed fat, Garcinia indica seed fat, hydrogenated cocoa butter, (macadamia seed oil / hydrogenated macadamia seed oil) esters, and milk fat.

[0056] Examples of moisturizing agents include glycerin, ethoxydiglycol, propylene glycol, maltitol, sorbitol, 1,3-butylene glycol, sodium lactate, polyethylene glycol, sodium pyrrolidone carboxylate, and sodium hyaluronate.

[0057] The polymeric compounds such as thickeners are not particularly limited as long as they are used in ordinary cosmetics, and examples thereof include acrylic acid-based thickeners; cellulose-based thickeners such as methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose, carboxyethyl cellulose, stearoxyhydroxypropyl methyl cellulose, nitrocellulose, and sodium cellulose sulfate; xanthan gum, hydroxypropyl xanthan gum, gum arabic, tragacanth gum, carbro gum, guar gum, Caesalpinia spinosa gum, and dextran gum. Natural thickeners such as stanol; silicone gels such as dimethicone / vinyl dimethicone crosspolymer, dimethicone / phenylvinyl dimethicone crosspolymer, and vinyl dimethicone / lauryl dimethicone crosspolymer; thickeners such as polyvinyl alcohol, polymeric dimethylpolysiloxane, pectin, agar, quince seed, starch, algae colloid, succinoglucan, collagen, gelatin, casein, albumin, carboxymethyl starch, sodium alginate, polyvinyl methyl ether, sodium polyacrylate, polyethylene acrylate, cationic polymers, and other polymer compounds.

[0058] Examples of the acrylic acid-based thickener include polyacrylamide, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (acrylamide / ammonium acrylate) copolymer, (sodium acrylate / acryloyldimethyltaurate / dimethylacrylamide) crosspolymer, polyacrylate-13, polyacrylate crosspolymer-6, (acrylamidopropyltrimonium chloride / acrylates) copolymer, (ammonium acryloyldimethyltaurate / vinylpyrrolidone). ) copolymer, (ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, (ammonium acryloyldimethyltaurate / steareth-25 methacrylate) crosspolymer, (acrylates / alkyl acrylate (C10-30)) crosspolymer, (acrylates / steareth-20 methacrylate) copolymer, (acrylates / beheneth-25 methacrylate) copolymer, (acrylates / steareth-20 itaconate) copolymer, steareth-10 allyl ether / acrylates copolymer, carboxyvinyl polymer, and the like can be mentioned.

[0059] Examples of whitening agents include ellagic acid, chamomile extract, licorice extract, rucinol, rosemary extract, arbutin, tranexamic acid, potassium 4-methoxysalicylic acid, ascorbic acid, ascorbic acid glucoside, and ascorbic acid derivatives such as magnesium ascorbyl phosphate.

[0060] Examples of texture improvers include amylopectin (amylose), acylated amino acids, polymethyl methacrylate, boron nitride, silica, alumina, aluminum hydroxide, metal soap, silicone powder, polymethyl methacrylate, and dimethylsilylated silica.

[0061] Examples of the drug include skin roughness prevention agents and anti-inflammatory agents. Examples of the skin roughness prevention agents and anti-inflammatory agents include dipotassium glycyrrhizinate, stearyl glycyrrhetinate, methyl salicylate, pyridoxine hydrochloride, allantoin, sea salt, mulberry bark extract, aloe extract, gardenia extract, chamomile extract, licorice extract, soapberry extract, apricot kernel extract, scutellaria extract, sweet tea extract, loquat extract, ginkgo extract, hypericum extract, yarrow extract, safflower extract, spruce extract, salvia extract, white birch extract, tangerine peel extract, peach kernel extract, chinese ginger extract, althea extract, and arnica extract. , carrot extract, peony extract, cnidium extract, gentian extract, cordyceps sinensis extract, phellodendron bark extract, inchinko extract, geranium herb extract, peach leaf extract, kumazasa extract, coix seed extract, horse chestnut extract, hawthorn extract, coptis japonica extract, lychee extract, calendula extract, peppermint extract, comfrey extract, butcher's broom extract, mallow extract, centaurea cyanus extract, and thorn extract. Other examples include hair growth medications, acne medications, dandruff and itching medications, and medications to prevent underarm odor.

[0062] Examples of ultraviolet absorbers include benzophenone derivatives such as 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sodium sulfonate, dihydroxydimethoxybenzophenone-sodium sulfonate, 2,4-dihydroxybenzophenone, and tetrahydroxybenzophenone; para-aminobenzoic acid derivatives such as para-aminobenzoic acid, ethyl para-aminobenzoate, glyceryl para-aminobenzoate, amyl para-dimethylaminobenzoate, and octyl para-dimethylaminobenzoate; methoxycinnamic acid derivatives such as ethyl paramethoxycinnamate, isopropyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate (ethylhexyl methoxycinnamate), sodium paramethoxycinnamate, potassium paramethoxycinnamate, and di-paramethoxycinnamate mono-2-ethylhexanoate glyceryl; octyl salicylate, Examples of the ultraviolet absorbent include salicylic acid derivatives such as phenyl salicylate, homomenthyl salicylate, dipropylene glycol salicylate, ethylene glycol salicylate, myristyl salicylate, and methyl salicylate; urocanic acid, ethyl urocanate, 4-tert-butyl-4'-methoxydibenzoylmethane (t-butyl methoxydibenzoylmethane), 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, methyl anthranilate, octocrylene (2-ethylhexyl 2-cyano-3,3-diphenylprop-2-enoate), 2-(4-diethylamino-2-hydroxybenzoyl)hexyl benzoate (diethylamino hydroxybenzoyl hexyl benzoate), ethylhexyl triazone, and bisethylhexyloxyphenol methoxyphenyl triazine. Examples also include microcapsules containing the above-mentioned ultraviolet absorbents.

[0063] Examples of proteins, protein hydrolysates and derivatives thereof include whey protein, casein protein, silk protein, wheat protein, rice protein, pea protein, soybean, sesame, collagen, keratin, conchiolin, marine collagen and the like, as well as their hydrolysates or acylated, silylated, cationized and alkyl esterified derivatives of protein hydrolysates.

[0064] Examples of the amino acid or a derivative thereof include amino acids such as glycine, alanine, valine, leucine, isoleucine, serine, threonine, phenylalanine, arginine, lysine, asparagine, aspartic acid, glutamine, glutamic acid, cystine, cysteine, methionine, tryptophan, proline, histidine, and taurine, or salts thereof, and acylated, alkylated, esterified, and glycerylated derivatives thereof.

[0065] Examples of the antioxidant include sodium pyrosulfite, vitamin E or a derivative thereof, tannin, and BHT (butylhydroxytoluene).

[0066] Examples of sequestering agents include sodium edetic acid, phosphoric acid, citric acid, phytic acid, etidronic acid, sodium glutamic acid diacetate, and the like.

[0067] Examples of pH adjusters include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, malic acid, potassium carbonate, sodium bicarbonate, and ammonium bicarbonate.

[0068] Examples of preservatives include 1,2-alkanediols such as 1,2-pentanediol and 1,2-hexanediol; paraoxybenzoic acid alkyl esters such as methylparaben and propylparaben; glyceryl monoalkyl ethers such as ethylhexylglycerin; benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, phenoxyethanol, levulinic acid, and benzyl alcohol.

[0069] The above-mentioned components commonly used in cosmetics can be used alone or in combination of two or more.

[0070] The water-in-oil emulsion cosmetic of the present invention can be used in the form of a liquid, emulsion, paste, cream, gel, etc. Among these, emulsion and cream are preferred. The water-in-oil emulsion cosmetic of the present invention can be widely applied to various cosmetics, and can be used as a beauty essence, milky lotion, makeup base, emollient cream, cleansing cream, hand cream, body cream, foundation, sunscreen milky lotion, sunscreen cream, etc. Among them, it is preferably used as an emollient cream, hand cream, and foundation. EXAMPLES

[0071] The present invention will now be described in detail with reference to examples, but the present invention is not limited to these examples. Note that the numerical values ​​shown in the tables of the examples are all in mass % relative to the total mass of the cosmetic.

[0072] Examples 1 to 7 and Comparative Examples 1 and 2: Cream The ingredients (A) to (C) shown in Table 1 were mixed, and the other ingredients were added while stirring with a disper (1400 rpm), and the mixture was further stirred with a disper (3000 rpm) for 5 minutes to prepare a cream. The viscosity (25°C) of each of the prepared creams was measured immediately after preparation using a Brookfield LVT viscometer. In addition, the stability and drainage were evaluated using the methods described below. The results are shown in Table 1.

[0073] [Stability evaluation] The creams prepared in Examples 1 to 7 and Comparative Examples 1 and 2 were stored in thermostatic chambers at 25° C. and 50° C. for 4 weeks, and the change in viscosity and emulsion stability were measured and evaluated according to the following criteria. The viscosity measurements were performed using a Brookfield LVT viscometer. Stability: ◎: Viscosity change was within ±15% from immediately after preparation ○: Viscosity change was ±15% or more and ±25% or less compared to immediately after preparation △: Viscosity change was ±25% or more compared to immediately after preparation. ×: Oil phase and water phase were separated

[0074] [Water drainage evaluation] The creams prepared in Examples 1 to 7 and Comparative Examples 1 and 2 were stored at 50° C. for 4 weeks, and then applied thinly to the outer side of the forearm and spread out, and visually observed to see whether water was removed. Draining: ○: No water leakage occurred. △: A slight water leak occurred. ×: Water drainage was clearly observed.

[0075] [Table 1] In Table 1, *1 is Protesil WO (product name, containing 40% (hydrolyzed silk / PG propyl methyl silanediol) crosspolymer, 50% hydrogenated polyisobutene, and 10% water) manufactured by Seiwa Kasei Co., Ltd. *2: Protesil WO (hydrolyzed silk / PG propylmethylsilanediol) crosspolymer has been replaced with silylated alanine-silane compound copolymer. It is. *3: KF-6104 manufactured by Shin-Etsu Chemical Co., Ltd. *4: KF-6105 manufactured by Shin-Etsu Chemical Co., Ltd. *5: KF-6038 manufactured by Shin-Etsu Chemical Co., Ltd. *6: KF-6048 manufactured by Shin-Etsu Chemical Co., Ltd. *7: NIKKOL Hexaglyn PR-15 manufactured by Nikko Chemicals Co., Ltd. *8 is DEHYMULS PGPH (all trade names) manufactured by BASF.

[0076] Examples 8 to 10: Cream Component (b) shown in Table 2 was mixed while being heated in advance, and after cooling, component (a) was added. Then, component (c) was added while stirring with a dispenser (1400 rpm), and the mixture was further stirred with a dispenser (3000 rpm) for 5 minutes to prepare a cream. The viscosity of the prepared cream immediately after preparation was measured in the same manner as in Table 1, and the stability and drainage were also evaluated according to the same criteria as in Table 1. The results are shown in Table 2.

[0077] [Table 2]

[0078] In Table 2, *1, 3, and 7 are the same as in Table 1. *9: KSG-16 manufactured by Shin-Etsu Chemical Co., Ltd. *10 is KSG-43 manufactured by Shin-Etsu Chemical Co., Ltd. *11 is KSG-44 (all product names) manufactured by Shin-Etsu Chemical Co., Ltd.

[0079] As is clear from the results in Tables 1 and 2, in creams prepared using component (C) as an oil and component (A) as an emulsifier, Examples 1 to 10, which contained a surfactant as component (B), had equal or greater stability at 25°C and 50°C than Comparative Examples 1 and 2, which did not contain component (B), and were superior in terms of resistance to draining.

[0080] Examples 11 to 15 and Comparative Examples 3 and 4: Moisturizing cream Components (A) to (C) shown in Table 3 were mixed, and component (D) and other components were added while stirring with a disper (1400 rpm), and the mixture was further stirred with a disper (3000 rpm) for 5 minutes to prepare a moisturizing cream. The viscosity of the moisturizing cream prepared was measured immediately after preparation in the same manner as in Tables 1 and 2, and the cream was stored in a 50°C thermostatic chamber for 8 weeks to evaluate its stability, using the same evaluation criteria as in Tables 1 and 2. Furthermore, the cream was evaluated for its suppression of stickiness using the following method and evaluation criteria. The results are shown in Table 3.

[0081] [Evaluation of stickiness suppression] The moisturizing creams and control aqueous solutions prepared in Examples 11 to 15 and Comparative Examples 3 and 4 were applied to the inside of the forearm in an amount of 30 mg over an area of ​​1 cm x 5 cm, spread for 2 minutes, and then dried for 2 minutes. After drying, a dynamic friction coefficient measuring device (product name: Trinity Lab Handy Lab Tester Type: TL701) was used to measure the adhesive force (stress) when a load of 100 g was applied to the applied area and then pulled up. Water was added to the component (D) of each Example and Comparative Example to make 100% by mass to obtain an aqueous solution of the control Example for each Example and Comparative Example, and the adhesive force of the Example or Comparative Example relative to the Control Example was evaluated according to the following criteria.

[0082] ◎: The adhesive strength of the moisturizing cream was lower than that of the control, and the change in adhesive strength was 50% or more. ◯: The adhesion strength of the moisturizing cream was lower than that of the control, with the change in adhesion strength being 50% or less. ×: The adhesion of the moisturizing cream is higher than that of the control.

[0083] [Table 3]

[0084] In Table 3, *1, *3, and *7 are the same as Tables 1 and 2. *12 is Amitose DGA (product name, containing 50% bisglyceryl ascorbic acid by weight, 25% glycerin by weight, and 25% water by weight) manufactured by Seiwa Kasei Co., Ltd.

[0085] It is clear from the results in Table 3 that Examples 11 to 15, in which component (A) was blended together with components (B), (C), and (D), had storage stability at 50°C equal to or greater than that of Comparative Examples 3 and 4, in which component (A) was not blended. Glycerin, diglycerin, and glyceryl ascorbic acid are blended into cosmetics to impart moisturizing properties to the cosmetics. The moisturizing creams of Examples 11 to 15 and Comparative Examples 3 and 4 have excellent moisturizing properties, which are believed to be achieved by blending glycerin, diglycerin, and glyceryl ascorbic acid as component (D).

[0086] Furthermore, Examples 11 to 15, which contain glycerin, diglycerin, or glyceryl ascorbic acid as component (D), also have an excellent effect of suppressing stickiness, and the results in Table 3 show that Examples 11, 12, 14, and 15, which contain diglycerin or glyceryl ascorbic acid, are particularly excellent in the effect of suppressing stickiness. From these results, it can be said that when components (A), (B), and (C) are contained, the stickiness problem is suppressed and storage stability is also excellent, even when component (D) glycerin, diglycerin, or glyceryl ascorbic acid is contained.

Claims

1. A water-in-oil emulsion cosmetic preparation comprising the following components (A), (B), and (C), wherein the mass ratio (B) / (A) of component (B) to component (A) is 0.01 or more and 1.0 or less: (A) General formula (I): 【Chemistry 1】 [In the formula, R 1 represents a hydroxyl group or an alkyl group having 1 to 3 carbon atoms; R 2 represents a residue of a side chain of a basic amino acid having an amino group at the end of the side chain, excluding the terminal amino group, and R 3 is R 2 A is a bond and represents an amino acid side chain other than -CH 2 --, --CH 2 CH 2 --, --CH 2 CH 2 CH 2 -, -(CH 2 ) 3 OCH 2 CH(OH)CH 2 -, -(CH 2 ) 3 S-, -(CH 2 ) 3 NH- and -(CH 2 ) 3 OCOCH 2 CH 2 -, x is 0 to 50, y is 1 to 100, and x+y is 1 to 100 (note that x and y only indicate the number of amino acids and do not indicate the order of the amino acid sequence. In addition, 1 may be the same or different.) with a silylated peptide or silylated amino acid represented by the following general formula (II): R 4 m () p Y (4-p-m) () [In the formula, m is an integer of 0 to 2, p is an integer of 2 to 4, m+p≦4, and R 4 is an organic group in which a carbon atom is directly bonded to a silicon atom, and m R 4 may be the same or different, and (4-pm) Y's each represent an alkoxy group or a hydrogen atom. (B) a silicone surfactant or a nonionic surfactant selected from the group consisting of polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, cetyl PEG / PPG-10 / 1 dimethicone, polyglyceryl-6 polyricinoleate, and polyglyceryl-2 dipolyhydroxystearate; (C) An oil selected from ester oils, silicone oils, and hydrocarbon oils

2. 2. The water-in-oil emulsion cosmetic according to claim 1, further comprising component (D): one or more selected from the group consisting of glycerin, diglycerin, glyceryl ascorbic acid, and salts thereof.

3. 3. The water-in-oil emulsion cosmetic according to claim 2, wherein the component (D) is bisglyceryl ascorbic acid.

4. 4. The water-in-oil emulsion cosmetic according to claim 1, wherein the component (C) is selected from the group consisting of caprylic / capric triglyceride, decamethylcyclopentasiloxane, dimethicone, mineral oil, and squalane.

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