Water-in-oil emulsion cosmetics

Abstract

To provide a water-in-oil emulsion cosmetic having a suitable firmness without being greasy, and providing a feeling of richness and fitting.SOLUTION: A water-in-oil emulsion cosmetic contains: (A) an alkoxysalicylic acid represented by general formula (I) in the figure or a salt thereof (in formula (I), R represents a C1-6 lower alkyl group); (B) an organically modified clay mineral; (C) a silicone surfactant having an HLB less than 8; and (D) a silicone oil of at least 1000 mPa S.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a water-in-oil emulsion cosmetic containing an alkoxysalicylic acid. [Background technology]

[0002] Alkoxysalicylic acid or its salts are known as active ingredients that have excellent whitening effects by improving or preventing abnormal melanin deposition in the skin. However, when alkoxysalicylic acid or its salts are incorporated into water-in-oil emulsion compositions, they generally suffer from poor stability over time and, in some cases, phase separation between the oil phase and the aqueous phase occurs.

[0003] In order to improve these problems of stability and usability, Patent Document 1 proposes blending a salt as a buffer and a specified amount of polyethylene glycol having a weight-average molecular weight of 1,000 to 200,000 into a water-in-oil emulsion skin preparation containing alkoxysalicylic acid or its salt.

[0004] Furthermore, Patent Document 2 describes that by blending a liquid fatty acid with a water-in-oil emulsion composition containing an alkoxysalicylic acid or its salt and an organically modified clay mineral, the emulsion has good stability over time, is non-sticky, and has a moist feel when used, regardless of whether the composition is stored in a container made of glass, metal, resin, ceramic, or other material. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4073389 [Patent Document 2] International Publication No. 2013 / 024653 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0006] It is common to incorporate organically modified clay minerals into water-in-oil emulsion cosmetics as viscosity adjusters, emulsion stabilizers, and to impart a moist feel to the skin. However, when alkoxysalicylic acid or its salt is incorporated into a water-in-oil emulsion cosmetic containing an organically modified clay mineral, the cosmetic's hardness decreases. Furthermore, the richness and texture of conventional water-in-oil emulsion cosmetics incorporating alkoxysalicylic acid or its salt are not always satisfactory, and further improvements are desired. To increase hardness, a common approach is to incorporate a large amount of wax, but incorporating a high amount of wax results in stickiness.

[0007] The present invention has been made in view of the above problems, and has as its object to provide a water-in-oil emulsion cosmetic that has a moderate hardness but is not sticky, and has a good richness and a good fitting feeling. [Means for solving the problem]

[0008] The water-in-oil emulsion cosmetic of the present invention comprises: (A) an alkoxysalicylic acid represented by the following general formula (I) or a salt thereof; [ka] (In formula (I), R represents a lower alkyl group having 1 to 6 carbon atoms.) (B) organically modified clay minerals; (C) a silicone surfactant having an HLB value of less than 8; (D) Silicone oil of 1000 mPa·S or more; It includes:

[0009] The water-in-oil emulsion cosmetic of the present invention preferably further contains (E) a silicone elastomer.

[0010] The water-in-oil emulsion cosmetic of the present invention preferably further comprises (F) a silicone coating agent.

[0011] The amount of (D) silicone oil is preferably 0.5 to 2.5% by mass relative to the total amount of the cosmetic.

[0012] (A) The alkoxysalicylic acid or salt thereof is preferably 4-methoxysalicylic acid potassium salt.

[0013] The amount of (B) organically modified clay mineral is preferably 1.5 to 3% by mass based on the total amount of the cosmetic.

[0014] (B) The organically modified clay mineral is preferably distearylammonium hectorite. [Effects of the Invention]

[0015] The water-in-oil emulsion cosmetic of the present invention comprises: (A) an alkoxysalicylic acid represented by the above general formula (I) or a salt thereof; (B) organically modified clay minerals; (C) a silicone surfactant having an HLB value of less than 8; (D) Silicone oil of 1000 mPa·S or more; Since it contains the above, it has a moderate hardness but is not sticky, and can have a good richness and a good fitting feeling. DETAILED DESCRIPTION OF THE INVENTION

[0016] The water-in-oil emulsion cosmetic of the present invention comprises: (A) an alkoxysalicylic acid represented by the above general formula (I) or a salt thereof; (B) organically modified clay minerals; (C) a silicone surfactant having an HLB value of less than 8; (D) Silicone oil of 1000 mPa·S or more; It includes: Each component will be described in detail below. In this specification, PEG is an abbreviation for polyethylene glycol, and PPG is an abbreviation for polypropylene glycol.

[0017] (A) Alkoxysalicylic acid represented by the above general formula (I) or its salt The (A) alkoxysalicylic acid or its salt represented by the above general formula (I) (hereinafter also referred to simply as (A) alkoxysalicylic acid or its salt) contained in the water-in-oil emulsion cosmetic of the present invention is not particularly limited as long as it is used in the fields of cosmetics, pharmaceuticals, quasi-drugs, etc., but the present invention uses the alkoxysalicylic acid represented by the above general formula (I), i.e., a salicylic acid-based compound in which the hydrogen atom at any of the 3-, 4-, or 5-position of salicylic acid is substituted with an alkoxy group (—OR), or a salt thereof.

[0018] In the above general formula (I), the alkyl group (R) constituting the alkoxy group (-OR) is a lower alkyl group having 1 to 6 carbon atoms, and may be either linear or branched. Specific examples include, but are not limited to, a methyl group (corresponding alkoxy group -OR: methoxy group), an ethyl group (same: ethoxy group), a propyl group (same: propoxy group), an isopropyl group (same: isopropoxy group), a butyl group (same: butoxy group), and an isobutyl group (same: isobutoxy group).

[0019] Specific examples of the alkoxysalicylic acid represented by the general formula (I) include 3-methoxysalicylic acid (2-hydroxy-3-methoxybenzoic acid), 3-ethoxysalicylic acid (2-hydroxy-3-ethoxybenzoic acid), 4-methoxysalicylic acid (2-hydroxy-4-methoxybenzoic acid), 4-ethoxysalicylic acid (2-hydroxy-4-ethoxybenzoic acid), 4-propoxysalicylic acid (2-hydroxy-4-propoxybenzoic acid), 4-isopropoxysalicylic acid (2-hydroxy-4-isopropoxybenzoic acid), 4-butoxysalicylic acid (2-hydroxy-4-buthoxybenzoic acid), 5-methoxysalicylic acid (2-hydroxy-5-methoxybenzoic acid), 5-ethoxysalicylic acid (2-hydroxy-5-ethoxybenzoic acid), and 5-propoxysalicylic acid (2-hydroxy-5-propoxybenzoic acid).

[0020] Alkoxysalicylic acids are known substances, and for example, 5-methoxysalicylic acid can be easily synthesized by the methods described in "Beil 10227," and 4-methoxysalicylic acid can be easily synthesized by the methods described in "Beil 10379."Also, they are commercially available as reagents from Aldrich (Germany) and other companies, and these can also be used.

[0021] The alkoxysalicylic acid also includes its salts, and the type of such salt is not particularly limited as long as it is a pharmaceutically acceptable salt, and examples thereof include alkali metal salts such as sodium salt and potassium salt, alkaline earth metal salts such as calcium salt, as well as ammonium salts and amino acid salts. In particular, potassium 4-methoxysalicylate can be preferably used from the viewpoints of whitening effect and easy availability.

[0022] The (A) alkoxysalicylic acid or its salt may be used alone or in appropriate combination of two or more. The blending amount of the (A) alkoxysalicylic acid or its salt is preferably 0.001 to 20% by mass, more preferably 0.01 to 10% by mass, and even more preferably 0.5 to 3% by mass, of the total amount of the cosmetic. When the blending amount of the (A) alkoxysalicylic acid or its salt is 0.001% by mass or more, it is possible to more fully exert the whitening effect, and when it is 20% by mass or less, it is possible to achieve a less sticky feel when used.

[0023] (B) Organically modified clay minerals The (B) organically modified clay mineral contained in the water-in-oil emulsion cosmetic of the present invention is preferably one in which a quaternary ammonium salt compound is added to a natural or synthetic smectite clay mineral such as bentonite via an ion exchange reaction. The (B) organically modified clay mineral is not particularly limited as long as it is pharmaceutically acceptable, and examples include dimethyl distearyl ammonium hectorite, dimethyl ammonium hectorite, benzyl dimethyl stearyl ammonium hectorite, and magnesium aluminum silicate treated with distearyl dimethyl ammonium chloride. Preferred examples of commercially available products include dimethyl distearyl ammonium hectorite sold by Elementis under the name "Benton 38VCG" and benzyl dimethyl stearyl ammonium hectorite sold by Elementis under the name "Benton 27VCG."

[0024] The (B) organically modified clay mineral can be used alone or in appropriate combination of two or more. The blending amount of the (B) organically modified clay mineral is preferably 1.5 to 3 mass% of the total amount of the cosmetic, and more preferably 1.8 to 2.8 mass%. When the blending amount of the (B) organically modified clay mineral is 1.5 mass% or more of the total amount of the cosmetic, emulsion stability can be improved, and when it is 3 mass% or less, stickiness can be suppressed, resulting in a better feel when used.

[0025] (C) Silicone surfactants with an HLB of less than 8 Examples of the (C) silicone surfactant having an HLB (Hydrophile-Lipophile Balance) of less than 8 contained in the water-in-oil emulsion cosmetic of the present invention (hereinafter simply referred to as (C) silicone surfactant) include polyoxyalkylene-modified silicone, polyoxyalkylene-alkyl co-modified silicone, polyglycerin-modified silicone, and / or polyglycerin-alkyl co-modified silicone. One (C) silicone surfactant can be used alone, or two or more can be used in appropriate combination.

[0026] Preferred examples of commercially available products include KF-6017 (PEG-10 dimethicone, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-6028 (PEG-9 polydimethylsiloxyethyl dimethicone, manufactured by Shin-Etsu Chemical Co., Ltd.), ABIL EM90 (cetyl PEG / PPG-10 / 1 dimethicone, manufactured by Evonik Goldschmidt), KF-6038 (lauryl PEG-9 polydimethylsiloxyethyl dimethicone, manufactured by Shin-Etsu Silicones), and bis-butyl dimethicone polyglyceryl-3.

[0027] The blending amount of (C) silicone surfactant is preferably 0.1 to 8 mass% of the total cosmetic amount, more preferably 0.2 to 7 mass%, and even more preferably 0.4 to 5 mass%. When the blending amount of (C) silicone surfactant is 0.1 mass% or more of the total cosmetic amount, better emulsion stability can be achieved, and when it is 8 mass% or less, stickiness can be suppressed and usability can be improved.

[0028] (D) Silicone oil with a temperature of 1000 mPa·S or higher The water-in-oil emulsion cosmetic of the present invention contains (D) a silicone oil of 1000 mPa·S or more (hereinafter simply referred to as (D) silicone oil). The inclusion of (D) a silicone oil with a viscosity of 1000 mPa·S or more not only provides an appropriate hardness, but also makes the water-in-oil emulsion cosmetic non-sticky and improves its richness. In this specification, "richness" refers to the feeling of the cosmetic coating the skin after it has been absorbed into the skin. Because the water-in-oil emulsion cosmetic of the present invention contains (D) a silicone oil of 1000 mPa·S or more, it is possible to provide the water-in-oil emulsion cosmetic with an appropriate hardness even if it is substantially free of wax. Here, "substantially free of wax" means that the wax content is less than 1% by mass.

[0029] (D) Silicone oils can be selected from silicone oils with the viscosity ranges described above, such as methylpolysiloxane, dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane, silicone resins, high-polymerization gum-type dimethylpolysiloxane, methylhydrogenpolysiloxane, dimethylsiloxane-methyl(polyoxyethylene)siloxane copolymer, methylpolysiloxane emulsion, alkyl-modified silicone, amino-modified silicone, and polyether-modified silicone. Commercially available products include dimethylpolysiloxanes such as KF-96A-5000cs and KF-96H-10,000cs (manufactured by Shin-Etsu Chemical Co., Ltd.). These (D) silicone oils can be used alone or in combination of two or more.

[0030] The viscosity of the silicone oil is preferably 1000 to 15000 mPa·S, more preferably 2000 to 12000 mPa·S, and even more preferably 4000 to 11000 mPa·S. When the viscosity of the silicone oil is 1000 mPa·S or higher, it is possible to impart appropriate hardness, and when it is 15000 mPa·S or lower, it is possible to improve emulsion stability. Here, the viscosity is measured at 30°C using a Brookfield viscometer.

[0031] The blending amount of (D) silicone oil is preferably 0.5 to 2.5% by mass, and more preferably 0.8 to 2.3% by mass, of the total amount of the cosmetic. By blending (D) silicone oil in an amount of 0.5% by mass or more of the total amount of the cosmetic, a more appropriate hardness can be imparted, and by blending it in an amount of 2.5% by mass or less, better emulsion stability can be achieved.

[0032] (E) Silicone elastomer The water-in-oil emulsion cosmetic of the present invention preferably further contains (D) a silicone elastomer. By incorporating (E) a silicone elastomer, the fit can be further improved. In this specification, "fit" means that the cosmetic does not continue to spread when applied and does not become difficult to finish, but rather the cosmetic stays well on the skin.

[0033] Examples of (E) silicone elastomers include crosslinked silicone resin powders such as dimethicone crosspolymer, (dimethicone / phenylvinyldimethicone) crosspolymer, (dimethicone / vinyldimethicone / methicone) crosspolymer, dimethicone / vinyldimethicone crosspolymer, and (diphenyldimethicone / vinyldiphenyldimethicone / silsesquioxane) crosspolymer. From the viewpoint of obtaining a better fit, (dimethicone / phenylvinyldimethicone) crosspolymer is preferred. These silicone elastomers can be used alone or in suitable combination of two or more.

[0034] The silicone elastomer (E) may be blended in the form of a silicone gel consisting of a crosslinked silicone resin powder and a solvent. Such silicone gels can be commercially available products, such as KSG-15, KSG-18A, and KSG-16 (all manufactured by Shin-Etsu Chemical Co., Ltd.).

[0035] The blending amount of (E) silicone elastomer is preferably 0.1 to 5 mass% of the total cosmetic amount, more preferably 0.1 to 4 mass%, even more preferably 0.15 to 3 mass%, and especially preferably 0.15 to 2 mass%. When the blending amount of (E) silicone elastomer is 0.1 mass% or more of the total cosmetic amount, stickiness can be further suppressed, and when it is 5 mass% or less, emulsification can be further improved.

[0036] (F) Silicone coating agent The water-in-oil emulsion cosmetic of the present invention preferably further comprises (F) a silicone coating agent. By including (F) a silicone coating agent, the water-in-oil emulsion cosmetic can be made to have a better fit. Preferred examples of (F) silicone coating agents include trimethylsiloxysilicate, siliconized pullulan, (acrylates / dimethicone) copolymers, and silsesquioxanes, with trimethylsiloxysilicate and siliconized pullulan being preferred from the viewpoint of achieving a better fit. These silicone coating agents can be used alone or in suitable combination of two or more.

[0037] Commercially available products include, for example, X-21-5250 (manufactured by Shin-Etsu Chemical Co., Ltd., 50% decamethylcyclopentasiloxane solution), X-21-5250L (manufactured by Shin-Etsu Chemical Co., Ltd., 50% dimethicone solution), X-21-5616 (manufactured by Shin-Etsu Chemical Co., Ltd., 60% isododecane solution), X-21-5249 (manufactured by Shin-Etsu Chemical Co., Ltd., 50% decamethylcyclopentasiloxane solution), X-21-5249L (manufactured by Shin-Etsu Chemical Co., Ltd., 50% dimethicone solution), and KF-7312 (manufactured by Shin-Etsu Chemical Co., Ltd., 50% decamethylcyclopentasiloxane solution). Preferred examples thereof include KF-7312K (manufactured by Shin-Etsu Chemical Co., Ltd., 60% dimethicone solution), KF-7312L (manufactured by Shin-Etsu Chemical Co., Ltd., 50% dimethicone solution), KF-7312T (manufactured by Shin-Etsu Chemical Co., Ltd., 60% methyltrimethicone solution), X-21-5595 (manufactured by Shin-Etsu Chemical Co., Ltd., 60% isododecane solution), KF-9021 (manufactured by Shin-Etsu Chemical Co., Ltd., 50% decamethylcyclopentasiloxane solution), KF-9021L (manufactured by Shin-Etsu Chemical Co., Ltd., 50% dimethicone solution), MQ-1600 Solid Resin (manufactured by Toray Dow Silicones, 100% pure content), and Wacker-Belsil TMS803 (manufactured by Asahi Kasei Wacker Silicones, 100% pure content).

[0038] Although the bonding ratio of silicone compounds to reactive functional groups of silicon-modified pullulan varies depending on the type of pullulan, it is generally preferable that the average bonding number of silicone compounds per constituent sugar unit of the polysaccharide compound (substitution degree) is 0.5 to 3.0. Note that in the present invention, the substitution degree is calculated from the Si content (mass%) in the compound. When blending siliconized pullulan, dissolving it in low molecular weight silicone oil or light isoparaffin before blending can improve ease of blending and improve the feel when used.

[0039] The siliconized pullulan is preferably tri(trimethylsiloxy)silylpropylcarbamate pullulan. Siliconized pullulan produced by a known method can be used (for example, Japanese Patent Application Laid-Open No. 10-29910). Commercially available products include, for example, TSPL-30-ID (tri(trimethylsiloxy)silylpropylcarbamic acid pullulan, manufactured by Shin-Etsu Chemical Co., Ltd., 30% isododecane solution) and TSPL-30-D5 (tri(trimethylsiloxy)silylpropylcarbamic acid pullulan, manufactured by Shin-Etsu Chemical Co., Ltd., 30% decamethylcyclopentasiloxane solution).

[0040] The blending amount of (F) silicone coating agent is preferably 0.05 to 5 mass% of the total cosmetic amount, more preferably 0.1 to 3 mass%, and even more preferably 0.5 to 2 mass%. When the blending amount of (F) silicone coating agent is 0.05 mass% or more of the total cosmetic amount, a better fit can be obtained, and when it is 5 mass% or less, stickiness can be suppressed and a better feel can be obtained.

[0041] The water-in-oil emulsion cosmetic of the present invention preferably has a hardness of 11 or more, more preferably 11.5 or more, and even more preferably 12 or more, as measured in an atmosphere of 25°C using a rheometer (NRM-3002D manufactured by Fudo Kogyo Co., Ltd.; diameter 8.0 mm, needle penetration 10 mm). Having such an appropriate hardness allows the cosmetic to maintain an appropriate hardness without flowing, even when filled into a jar, for example. Furthermore, having an appropriate hardness can also improve the rich feeling of the cosmetic when applied. Here, "rich feeling" refers to a feeling of thickness during application of the cosmetic, with a bouncy, appropriate response.

[0042] In addition to the above-mentioned essential components, the water-in-oil emulsion cosmetic of the present invention may contain, as needed, ingredients typically used in external skin preparations such as cosmetics and pharmaceuticals, such as other whitening agents, moisturizers, and antioxidants, as well as oily components other than the above-mentioned (D) silicone oil, ultraviolet absorbers, surfactants other than the above-mentioned (C) silicone surfactants, moisturizers, thickeners, alcohols, powder components, colorants, aqueous components, water, various skin nutrients, and the like, within limits that do not impair the effects of the present invention.

[0043] Examples of oily components include natural oils and fats such as camellia oil, macadamia nut oil, olive oil, castor oil, safflower oil, soybean oil, tea seed oil, cacao butter, coconut oil, hardened coconut oil, palm oil, Japan wax, hardened castor oil, beeswax, candelilla wax, carnauba wax, lanolin, liquid lanolin, jojoba wax, hard lanolin, polyoxyethylene lanolin alcohol ether, and polyoxyethylene cholesterol ether; hydrocarbon oils and fats such as liquid paraffin, ozokerite, squalene, paraffin, ceresin, petrolatum, and microcrystalline wax; isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, and 12 Examples of the additives include synthetic oil components such as cholesteryl hydroxystearate, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, pentaerythritol tetra-2-ethylhexylate, glycerin tri-2-ethylhexylate, trimethylolpropane triisostearate, cetyl-2-ethylhexanoate, and castor oil fatty acid methyl ester; linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane; and cyclic polysiloxanes such as decamethylpolysiloxane, dodecamethylpolysiloxane, and tetramethyltetrahydrogenpolysiloxane.

[0044] Examples of ultraviolet absorbers include benzoic acid-based ultraviolet absorbers such as para-aminobenzoic acid, para-aminobenzoic acid monoglycerin ester, N,N-dipropoxypara-aminobenzoic acid ethyl ester, and N,N-dimethylpara-aminobenzoic acid ethyl ester; anthranilic acid-based ultraviolet absorbers such as homomenthyl-N-acetylanthranilate; amyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, and p-isopropanol phenyl salicylate. Salicylic acid-based UV absorbers such as octyl cinnamate, ethyl 4-isopropyl cinnamate, methyl 2,5-diisopropyl cinnamate, ethyl 2,4-diisopropyl cinnamate, propyl p-methoxycinnamate, isoamyl p-methoxycinnamate, octyl p-methoxycinnamate (2-ethylhexyl p-methoxycinnamate), 2-ethoxyethyl p-methoxycinnamate, 2-ethylhexyl α-cyano-β-phenyl cinnamate, glyceryl Cinnamic acid-based ultraviolet absorbers such as mono-2-ethylhexanoyl-di-p-methoxycinnamate, benzophenone-based ultraviolet absorbers such as 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, and 2-ethylhexyl-4'-phenylbenzophenone-2-carboxylate, Examples of ultraviolet absorbers include 3-(4'-methylbenzylidene)-d,l-camphor, 3-benzylidene-d,l-camphor, urocanic acid, urocanic acid ethyl ester, 2,2'-hydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole, dibenzalazine, dianisoylmethane, 4-methoxy-4'-t-butyldibenzoylmethane, and 5-(3,3-dimethyl-2-norbornylidene)-3-pentan-2-one.

[0045] The water-in-oil emulsion cosmetic of the present invention may contain surfactants other than the (C) silicone surfactant, but it is preferable that the surfactants contained in the cosmetic, including the (C) silicone surfactant (all surfactants contained in the cosmetic), be blended so that the weighted average HLB of the surfactants is less than 8.

[0046] Examples of lipophilic nonionic surfactants include sorbitan fatty acid esters such as sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, and diglycerol sorbitan penta-2-ethylhexylate, glycerin or polyglycerin esters such as glycerin monostearate, α,α'-oleic acid pyroglutamate, and glycerin monostearate malate, polyethylene glycol fatty acid esters, propylene glycol fatty acid esters such as propylene glycol monostearate, hydrogenated castor oil derivatives, and glycerin alkyl ethers. Among these, PEG-8 diisostearate, which is a polyethylene glycol fatty acid ester, is preferred.

[0047] Examples of hydrophilic nonionic surfactants include polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan monooleate and polyoxyethylene sorbitan monostearate; polyoxyethylene sorbit fatty acid esters such as polyoxyethylene sorbit monolaurate, polyoxyethylene sorbit monooleate and polyoxyethylene sorbit monostearate; polyoxyethylene glycerin fatty acid esters such as polyoxyethylene glycerin monostearate, polyoxyethylene glycerin monoisostearate and polyoxyethylene glycerin triisostearate; polyoxyethylene fatty acid esters such as polyoxyethylene monooleate and polyoxyethylene distearate; polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene stearyl ether, polyoxyethylene-2-octyldodecyl ether and polyoxyethylene cholestanol ether; polyoxyethylene octylphenyl ether and polyoxyethylene nonylphenyl ether. polyoxyethylene alkylphenyl ethers such as polyoxyethylene dinonylphenyl ether, Pluronic surfactants such as Pluronic, polyoxyethylene polyoxypropylene cetyl ether, polyoxyethylene polyoxypropylene-2-decyltetradecyl ether, polyoxyethylene polyoxypropylene monobutyl ether, polyoxyethylene polyoxypropylene, hydrogenated lanolin, polyoxyethylene polyoxypropylene glycerin ether, tetrapolyoxyethylene-tetrapolyoxypropylene ethylenediamine condensates such as Tetronic, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil monoisostearate, polyoxyethylene hydrogenated castor oil triisostearate, polyoxyethylene hydrogenated castor oil monopyroglutamic acid monoisostearate diester, polyoxyethylene hydrogenated castor oil maleate, or polyoxyethylene hydrogenated castor oil derivatives, coconut oil fatty acid diethanolamide,Examples of such an ester include alkanolamides such as lauric acid monoethanolamide and fatty acid isopropanolamide, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene alkylamines, polyoxyethylene fatty acid amides, sucrose fatty acid esters, polyoxyethylene nonylphenyl formaldehyde condensates, alkylethoxydimethylamine oxide, and trioleyl phosphate.

[0048] Examples of anionic surfactants include fatty acid soaps such as sodium laurate and sodium palmitate, higher alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate, alkyl ether sulfates such as polyoxyethylene triethanolamine lauryl sulfate and sodium polyoxyethylene lauryl sulfate, N-acylsarcosinates such as sodium lauroyl sarcosinate, higher fatty acid amide sulfonates such as sodium N-myristoyl-N-methyl taurate, sodium coconut oil fatty acid methyl tauride and sodium lauryl methyl tauride, phosphate salts such as sodium polyoxyethylene oleyl ether phosphate and sodium polyoxyethylene stearyl ether phosphate, and sulfosuccinates such as sodium di-2-ethylhexyl sulfosuccinate, sodium monolauroyl monoethanolamide polyoxyethylene sulfosuccinate and sodium lauryl polypropylene glycol sulfosuccinate. salts, alkylbenzenesulfonates such as linear dodecylbenzenesulfonate sodium and linear dodecylbenzenesulfonate triethanolamine; N-acylglutamates such as N-lauroylglutamate monosodium and N-stearoylglutamate disodium; higher fatty acid ester sulfates such as hydrogenated coconut oil fatty acid glycerin sodium sulfate; polyoxyethylene alkyl ether carboxylates, α-olefin sulfonates, higher fatty acid ester sulfonates, secondary alcohol sulfates, higher fatty acid alkylolamide sulfates, sodium lauroylmonoethanolamide succinate, N-palmitoyl aspartic acid, ditriethanolamine, and coconut oil fatty acid collagen hydrolyzed alkali salts.

[0049] Examples of cationic surfactants include alkyltrimethylammonium salts such as stearyltrimethylammonium chloride and lauryltrimethylammonium chloride, dialkyldimethylammonium salts such as distearyldimethylammonium chloride, alkylpyridinium salts such as poly(N,N'-dimethyl-3,5-methylenepiperidinium) chloride and cetylpyridinium chloride, alkyl quaternary ammonium salts, alkyldimethylbenzylammonium salts, alkylisoquinolinium salts, dialkylmorphonium salts, polyoxyethylene alkylamines, alkylamine salts, polyamine fatty acid derivatives, amyl alcohol fatty acid derivatives, benzalkonium chloride, benzethonium chloride, cationic polymers, and β-NN-dimethyl-N-ethylammonioethyl acrylate vinylpyrrolidone chloride copolymers.

[0050] Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants such as 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium and 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt; and betaine-based amphoteric surfactants such as 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkyl betaine, amido betaine, and sulfobetaine.

[0051] Examples of moisturizing agents include cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, urea, and diglycerin ethylene oxide / propylene oxide adduct. In particular, when acidic mucopolysaccharides such as chondroitin sulfate and hyaluronic acid are added, the whitening effect of alkoxysalicylic acid and / or its salts is enhanced.

[0052] Examples of thickeners include gum arabic, carrageenan, tragacanth gum, quince seed, casein, sodium caseinate, dextrin, gelatin, sodium alginate, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl alcohol, sodium polyacrylate, carboxyvinyl polymer, guar gum, and xanthan gum.

[0053] Examples of polyhydric alcohols include ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, glycerin, erythritol, trimethylolpropane, pentaerythritol, sorbitol, maltitol, diglycerin, and polyethylene glycol.

[0054] Examples of higher alcohols include lauryl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, monostearyl glycerin ether (batyl alcohol), lanolin alcohol, cholesterol, phytosterol, isostearyl alcohol, and octyldodecanol.

[0055] Examples of powder components include inorganic powders such as talc, kaolin, mica, sericite, phlogopite, synthetic mica, magnesium carbonate, calcium carbonate, aluminum silicate, silica, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, metal soap (zinc myristate, calcium palmitate, aluminum stearate, etc.), and boron nitride; organic powders such as polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, polymethylsilsesquioxane powder, and cellulose powder; titanium dioxide; Examples of suitable pigments include inorganic pigments such as zinc oxide, iron oxide (red iron oxide), iron titanate, yellow iron oxide, black iron oxide, carbon black, low-order titanium oxide, mango violet, cobalt violet, chromium oxide, ultramarine, and Prussian blue; pearl pigments such as titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, colored titanium oxide-coated mica, bismuth oxychloride, and fish scale foil; metal powder pigments such as aluminum powder; organic pigments such as Red No. 201, Red No. 202, Orange No. 203, Yellow No. 205, Yellow No. 401, and Blue No. 404; organic pigments such as zirconium, barium, and aluminum lakes in Red No. 3, Yellow No. 4, Green No. 3, and Blue No. 1; and natural pigments such as chlorophyll and β-carotene. Examples of suitable synthetic resin emulsions include acrylic resin emulsions and polyvinyl acetate resin emulsions.

[0056] Examples of amino acids include glycine, leucine, phenylalanine, tyrosine, aspartic acid, glutamic acid, sodium glutamate, arginine, histidine, lysine, cystine, cysteine, sodium acyl sarcosine (sodium lauroyl sarcosine), acyl glutamate, glutathione, and pyrrolidone carboxylic acid.

[0057] Examples of organic amines include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.

[0058] Other ingredients that can be added include sequestering agents such as disodium edetate, trisodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, and gluconic acid, caffeine, tannin, verapamil, tranexamic acid and its derivatives, licorice extract, glabridin, hot water extract of fire thorn fruit, various herbal medicines, tocopherol acetate, glycyrrhizic acid and its derivatives or salts, other whitening agents such as vitamin C, magnesium ascorbyl phosphate, ascorbyl glucoside, arbutin, and kojic acid, and sugars such as glucose, fructose, mannose, sucrose, and trehalose. In particular, when vitamin E esters such as tocopherol acetate are added, the whitening effect of alkoxysalicylic acid and / or its salts is enhanced.

[0059] The water-in-oil emulsion cosmetic of the present invention can be provided as a cosmetic in various formulations such as a liquid, emulsion, cream, gel, or Bavarian cream. Furthermore, the water-in-oil emulsion cosmetic of the present invention can be provided as an emulsion, a skin care cream, a sunscreen cosmetic, a cosmetic containing a coloring agent, various liquid and cream foundations, a makeup base, a BB cream, and the like. [Example]

[0060] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. In the following examples, the blending amounts are expressed in mass % unless otherwise specified. Water-in-oil emulsion cosmetics having the compositions shown in Table 1 below were prepared by conventional methods and evaluated according to the following criteria.

[0061] (hardness) The hardness of the prepared water-in-oil emulsion cosmetic was measured in an atmosphere of 25°C using a rheometer (NRM-3002D manufactured by Fudo Kogyo Co., Ltd.; diameter 8.0 mm, needle insertion 10 mm) and evaluated according to the following criteria. A: 12 or more B: 10 or more and less than 12 C: 9 or more but less than 10 D: Less than 9

[0062] (Richness) The prepared water-in-oil emulsion cosmetics were used by 10 expert panelists, who evaluated the richness of the skin after application according to the following criteria. <Evaluation criteria> A: 9 or more people rated it as rich B: 6 to 8 people rated it as rich C: 5 or fewer people rated it as rich

[0063] (Fit) The prepared water-in-oil emulsion cosmetics were used by 10 expert panelists, who evaluated the feeling of fit when applied according to the following criteria. <Evaluation criteria> A+: 9 or more people rated it as a good fit A: 6-8 people rated it as a good fit B: 4-5 people or less rated it as a good fit C: 3 or fewer people rated it as a good fit

[0064] (Emulsification stability) The prepared water-in-oil emulsion cosmetic was filled into a 50 mL jar (made of resin) and left to stand at room temperature, 50°C, for 4 weeks. The emulsified state was then examined visually and with a microscope and evaluated based on the following evaluation criteria. <Evaluation criteria> A: No separation at all, and emulsion particles are stable B: Not separated, but some of the emulsified particles are broken C: No separation, but emulsion particles are broken D: Separated and emulsified particles broken

[0065] [Table 1]

[0066] As shown in Table 1, the water-in-oil emulsion cosmetics of Examples 1 to 6, which contained silicone oils with a viscosity of 1000 mPa·S or higher, had higher hardness and a richer texture than Comparative Example 1, which contained only low-viscosity silicone oil. Furthermore, Examples 5 and 6, which contained (E) silicone elastomer and (F) silicone coating agent, provided a better fit.

Claims

1. (A) an alkoxysalicylic acid represented by the following general formula (I) or a salt thereof; 【Chemistry 2】 (In formula (I), R represents a lower alkyl group having 1 to 6 carbon atoms, and OR is bonded to the 3-, 4- or 5-position.) (B) an organically modified clay mineral; (C) a silicone surfactant having an HLB of less than 8; (D) a silicone oil having a viscosity of 1000 mPa·S or more; A water-in-oil emulsion cosmetic comprising: (B) A water-in-oil emulsion cosmetic, in which the organically modified clay mineral is present in an amount of 1.5 to 3 mass % based on the total amount of the cosmetic.

2. The water-in-oil emulsion cosmetic according to claim 1, further comprising (E) a silicone elastomer.

3. The water-in-oil emulsion cosmetic according to claim 1 or 2, further comprising (F) a silicone coating agent.

4. The water-in-oil emulsion cosmetic according to claim 1, 2 or 3, wherein the silicone oil (D) is present in an amount of 0.5 to 2.5% by mass based on the total amount of the cosmetic.

5. 5. The water-in-oil emulsion cosmetic according to any one of claims 1 to 4, wherein the (A) alkoxysalicylic acid or a salt thereof is 4-methoxysalicylic acid potassium salt.

6. 6. The water-in-oil emulsion cosmetic according to any one of claims 1 to 5, wherein the organically modified clay mineral (B) is dimethyl distearyl ammonium hectorite.

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