Oil-in-water emulsified solid cosmetic

Abstract

To provide an oil-in-water emulsified solid cosmetic that has a fresh feeling in use, exhibits superior fit to the skin, and is suitable for layering application.SOLUTION: An oil-in-water emulsified solid cosmetic of the present invention includes (A) a wax, (B) agar, and (C) trimethylsiloxysilicate. The blending ratio ((A) / (B)) of the component (A) to the component (B) is 4 to 150 in mass ratio. The blending ratio ((C) / (B)) of the component (C) to the component (B) is 0.3 to 30 in mass ratio.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a water-in-oil type emulsified solid cosmetic that is fresh, has excellent makeup retention, and is suitable for layering.

Background Art

[0002] Water-in-oil type emulsified solid cosmetics have the advantages of being superior in water resistance and having a good fit (adhesion to the skin) compared to oil-in-water type emulsions, but they lack a refreshing feeling and may cause a sticky or greasy feeling during use. In addition, in conventional water-in-oil type emulsified solid cosmetics, especially makeup cosmetics, powders such as hydrophobically treated pigments blended in the oil phase may adsorb to the wax and cause aggregation. Due to this aggregate, the spread during application becomes heavy, the freshness decreases, and a powdery feeling during use also occurs.

[0003] Therefore, a water-in-oil type emulsified solid cosmetic has been proposed in which the use feeling deterioration caused by aggregates of powder components and wax is improved by dispersing the powder in the inner aqueous phase. For example, Patent Document 1 describes that in a water-in-oil type emulsified solid cosmetic in which the outer oil phase is thickened or solidified with wax and / or a gelling agent, a powder containing hydrophilic titanium oxide is dispersed in the inner aqueous phase using a cationic dispersant and / or an amphoteric dispersant, so that a smooth and fresh feeling during application can be obtained, and a cosmetic excellent in stability can be obtained even at high temperatures. However, in the solid cosmetic of Patent Document 1, although the above-mentioned aggregates are suppressed and the use feeling is improved, there is still a problem that it is desired to impart a more fresh feeling.

[0004] On the other hand, as described in Patent Document 2, for example, in an oil-in-water type emulsified solid cosmetic, it is known that a fresh feeling can be imparted by blending a sulfur-containing polysaccharide such as pectin or carrageenan in the aqueous phase.

[0005] However, when a polysaccharide described in Patent Document 2 is blended into the internal aqueous phase of a water-in-oil emulsified solid cosmetic for the purpose of improving the fresh feeling of use, there is a problem that the fit feeling peculiar to the water-in-oil emulsified solid cosmetic decreases. In addition, due to the polysaccharide blended in the internal aqueous phase, problems such as a feeling of stickiness during application or makeup smudging when applied repeatedly occurred. Furthermore, when the amount of xanthan gum is increased to a certain amount or more, there is also a problem that it does not solidify sufficiently.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] An object of the present invention is to provide a water-in-oil emulsified solid cosmetic that has a fresh feeling of use, is excellent in the fit to the skin, and is suitable for layering.

[0008] As a result of intensive studies to solve the above problems, the inventors have found that by thickening and gelling the internal aqueous phase using xanthan gum and blending trimethylsiloxysilicate in the oil phase, it is possible to solve the problems of the feeling of use that occur when a polysaccharide is blended in the internal aqueous phase of a water-in-oil emulsified solid cosmetic, and have completed the present invention.

[0009] That is, the present invention is (A) wax, (B) xanthan gum, and (C) trimethylsiloxysilicate, including the blending ratio ((A) / (B)) of the component (A) to the component (B) is 4 to 150 in terms of mass ratio, Provided is a water-in-oil emulsion solid cosmetic in which the compounding ratio of the component (C) to the component (B) ((C) / (B)) is 0.3 to 30 in terms of mass ratio.

Advantages of the Invention

[0010] By adopting the above configuration, the present invention can be sufficiently solidified even when the (B) content is included, and the powdery feeling is reduced and the ease of spreading (smoothness of spreading) is felt as the aqueous component gelled by the content melts into the skin. A fresh feeling of use in which the aqueous component splashes out during application is imparted to the cosmetic, and the fit feeling peculiar to the water-in-oil emulsion cosmetic can be improved. In addition, it is possible to obtain a water-in-oil emulsion solid cosmetic in which the stickiness during application, which is a problem when the content is blended in the internal phase, is suppressed and no makeup smudging occurs even when applied repeatedly.

Embodiments for Carrying Out the Invention

[0011] The cosmetic according to the present invention is characterized by containing (A) wax, (B) content, and (C) trimethylsiloxysilicate in specific compounding ratios. Hereinafter, each component constituting the cosmetic of the present invention will be described in detail.

[0012] <(A) Wax> The (A) wax of the present invention (hereinafter, may be simply referred to as the “(A) component”) can be selected from waxes that can usually be used in cosmetics. Examples include oil components that are solid at normal temperature (25°C), including natural and synthetic fats and oils, hydrocarbon oils, waxes, higher fatty acids, higher alcohols, ester oils, and the like.

[0013] Specific examples include solid fats such as cocoa butter, horse oil, hydrogenated coconut oil, palm oil, beef tallow, mutton tallow, hydrogenated castor oil, hydrogenated vegetable oil, etc., hydrocarbon oils such as polyethylene wax, microcrystalline wax (branched saturated hydrocarbon), paraffin wax (linear hydrocarbon), ozokerite, ceresin wax, beeswax, montan wax, Fischer-Tropsch wax, etc., waxes such as beeswax, lanolin, carnauba wax, candelilla wax, rice bran wax, gay wax, nuca wax, montan wax, sugarcane wax, isopropyl lanolin fatty acid, reduced lanolin, hard lanolin, POE lanolin alcohol ether, POE cholesterol ether, etc., higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, etc., higher alcohols such as linear alcohols (e.g., cetanol, stearyl alcohol, behenyl alcohol, myristyl alcohol, cetearyl alcohol, etc.) and branched alcohols (e.g., glycerol monostearyl ether (batyl alcohol), monopalmityl glycerol ether, etc.), ester oils such as myristyl myristate, stearyl stearate, cetyl stearate, cetyl palmitate, cholesteryl stearate, cholesteryl oleate, dextrin palmitate, inulin stearate, hydrogenated jojoba oil, etc. One or more of these can be used in combination. Among these, it is preferable to use polyethylene wax, microcrystalline wax (branched saturated hydrocarbon), and paraffin wax (linear hydrocarbon).

[0014] As the wax (A) of the present invention, commercially available composite waxes in which a plurality of waxes are blended can be used. Examples of such commercially available composite waxes include PA wax (a blend wax of polyethylene wax and microcrystalline wax), Permic 160 (a blend wax of microcrystalline wax and paraffin) (all of the above are manufactured by Nikko Rika Co., Ltd.), etc.

[0015] <(B) Content> The (B) content of the present invention (hereinafter sometimes simply referred to as the “(B) component”) is not particularly limited as long as it is a content that can be usually used in cosmetics and contains agarose with high gelling power as the main component.

[0016] Natural products or commercially available products can be used as the (B) content of the present invention. As commercially available products, for example, Ina agar PS-84, Z-10, AX-30, AX-100, AX-200, T-1, S-5, M-7 (manufactured by Ina Food Industry Co., Ltd.) and the like can be preferably used. Further, purified agarose may be used as the (B) content.

[0017] <(C) Trimethylsiloxysilicic acid> The (C) trimethylsiloxysilicic acid of the present invention (hereinafter sometimes simply referred to as the “(C) component”) is not particularly limited as long as it is generally used as an oil-soluble film-forming agent in cosmetics. Examples of the (C) trimethylsiloxysilicic acid that can be used in the cosmetics according to the present invention include those having a weight average molecular weight of 10,000 or more. The weight average molecular weight is a polystyrene conversion value determined by gel permeation chromatography (GPC). Such trimethylsiloxysilicic acid can be produced by a known production method.

[0018] Examples of commercially available trimethylsiloxysilicic acid include X-21-5250 (50% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5250L (50% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5616 (60% isododecane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5249 (50% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5249L (50% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-7312 (50% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-7312K (60% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-7312L (50% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-7312T (60% methyltrimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), X-21-5595 (60% isododecane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-9021 (50% decamethylcyclopentasiloxane solution, manufactured by Shin-Etsu Chemical Co., Ltd.), KF-9021L (50% dimethicone solution, manufactured by Shin-Etsu Chemical Co., Ltd.), MQ-1600 Solid Resin (100% pure content, manufactured by Dow Corning Toray Co., Ltd.), Wacker-Belsil (registered trademark) TMS803 (100% pure content, manufactured by Asahi Kasei Wacker Silicone Co., Ltd.), and the like.

[0019] In the cosmetic according to the present invention, the blending amounts of the components (A), (B), and (C) are such that the blending mass ratio of the component (A) to the component (B) ((A) / (B)) is 4 to 150, and the blending mass ratio of the component (C) to the component (B) ((C) / (B)) is 0.3 to 30. By setting the blending amounts of the components (A), (B), and (C) of the present invention to the above ratios, an oil-in-water type emulsified solid cosmetic having excellent usability can be obtained.

[0020] In the cosmetic according to the present invention, the blending mass ratio of the component (A) to the component (B) ((A) / (B)) is 4 to 150, preferably 5 to 145, and more preferably 7 to 140. If the blending amount of the component (B) becomes too large with respect to the blending amount of the component (A), specifically, if the (A) / (B) blending mass ratio is less than 4, the cosmetic will not be sufficiently solidified.

[0021] In the cosmetic according to the present invention, the blending mass ratio ((C) / (B)) of the component (C) to the component (B) is 0.3 to 30, preferably 0.4 to 25 or 0.5 to 22, and more preferably 2 to 21 or 3 to 20. If the blending amount of (C) trimethylsiloxysilicate is too small with respect to the blending amount of (B) content, specifically, if the blending mass ratio ((C) / (B)) is less than 0.3, the feeling of use such as stickiness occurs when applied to the skin, and the cosmetics become saggy when the cosmetics are overlaid, making it unsuitable for overlying.

[0022] The blending amount of the component (A) in the cosmetic of the present invention is an amount usually used for solidifying the external oil phase in an oil-in-water type emulsified solid cosmetic, and is not particularly limited. For example, with respect to the total amount of the cosmetic, it is preferably 0.1 to 15% by mass, more preferably 0.5 to 10% by mass, and still more preferably 1 to 7% by mass.

[0023] The blending amount of the component (C) in the cosmetic of the present invention is not particularly limited as long as the above blending mass ratio ((C) / (B)) is satisfied. For example, as the lower limit value of the blending amount with respect to the total amount of the cosmetic, 0.15% by mass, 0.2% by mass, 0.25% by mass can be mentioned, and as the upper limit value, 20% by mass, 15% by mass, 12% by mass, 10% by mass can be mentioned.

[0024] The blending amount of the component (B) in the cosmetic of the present invention is not particularly limited as long as the above blending mass ratio ((A) / (B)) is satisfied. For example, as the lower limit value of the blending amount with respect to the total amount of the cosmetic, 0.03% by mass, 0.04% by mass, 0.05% by mass can be mentioned, and as the upper limit value, 1.8% by mass, 1.5% by mass, 1.2% by mass, 1.0% by mass can be mentioned.

[0025] The oil-in-water type emulsified solid cosmetic according to the present invention may further contain a pigment (D) having a hydrophobic surface. The pigment (hereinafter sometimes simply referred to as "(D) component") having a hydrophobic (D) surface of the present invention is a pigment commonly used in the cosmetic field, which means a pigment having a hydrophobic powder surface. The (D) component of the present invention may be untreated as long as the surface of the powder itself is hydrophobic, and it is necessary to be hydrophobized when the surface of the powder is hydrophilic. Examples of the pigment of the (D) component include inorganic pigments, organic pigments, and lake pigments.

[0026] Examples of inorganic pigments include inorganic powders such as extender pigments (for example, talc, kaolin, sericite, muscovite, synthetic mica, synthetic phlogopite, phlogopite, biotite, red mica, black mica, lithium mica, vermiculite, magnesium carbonate, calcium carbonate, diatomaceous earth, magnesium silicate, calcium silicate, aluminum silicate, barium silicate, strontium silicate, metal tungstate, silica, hydroxyapatite, zeolite, boron nitride, ceramic powder, etc.); hydrophilic colorants, for example, inorganic white pigments (for example, pigment-grade titanium oxide, pigment-grade zinc oxide, etc.); inorganic red pigments (for example, iron titanate, etc.); inorganic purple pigments (for example, manganese violet, cobalt violet, etc.); inorganic green pigments (for example, chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (for example, ultramarine, navy blue, etc.); pearl pigments (for example, titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, colored titanium oxide-coated mica, bismuth oxychloride, fish scale foil, etc.); pigment-grade iron oxide (for example, red iron oxide (red oxide of iron), yellow iron oxide, black iron oxide), carbon black; metal powder pigments (for example, aluminum powder, copper powder, etc.).

[0027] Examples of organic pigments include Pigment Red 201, Pigment Red 202, Pigment Red 204, Pigment Red 205, Pigment Red 220, Pigment Red 226, Pigment Red 228, Pigment Red 405, Pigment Orange 203, Pigment Orange 204, Pigment Yellow 205, Pigment Yellow 401, and Pigment Blue 404. Examples of lake pigments include zirconium, barium or aluminum lakes such as Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3 and Blue No. 1.

[0028] As the component (D) of the present invention, one or more selected from the above-mentioned pigments can be used. Among them, as the pigment of the present invention, it is preferable to use pigment-grade iron oxides such as yellow iron oxide, red iron oxide, black iron oxide, and pigment-grade titanium oxide. Here, the pigment grade refers to those having an average particle diameter of 100 nm to 1 μm. The average particle diameter of this pigment can be measured by a transmission electron microscope or a laser scattering / diffraction method.

[0029] Examples of the method for hydrophobic treatment of the pigment surface include silica treatment with silica, hydrous silica, etc.; alkyl dextrin treatment with palmitic acid dextrin, etc.; distearyldimethylammonium chloride treatment; silicone treatment with methylhydrogenpolysiloxane, methylpolysiloxane, etc.; fluorine treatment with perfluoroalkyl phosphate ester, perfluoroalcohol, etc.; amino acid treatment with N-acylglutamic acid, etc.; lecithin treatment; metal soap treatment such as aluminum stearate treatment and magnesium isostearate treatment; fatty acid treatment; inorganic compound treatment; alkyl phosphate ester treatment, etc. These hydrophobic treatments can be carried out according to conventional methods.

[0030] In the cosmetic according to the present invention, the pigment with a hydrophobic surface is dispersed in the external oil phase.

[0031] (D) component is an optional component, so it is not particularly limited as long as it is a blending amount generally used in cosmetics for the purpose of obtaining a desired color on the skin. As an example of the total blending amount of the pigment, it is 0.1% by mass or more, for example, 1 to 20% by mass, preferably 2 to 15% by mass, based on the total amount of the cosmetic.

[0032] In the present invention, a (E) dispersant may be blended for the purpose of uniformly dispersing powder components such as pigments in the oil phase. The "dispersant" in this specification refers to a substance that adsorbs on the surface of the powder component, suppresses the aggregation of the powder component, and can be uniformly dispersed in an oily medium. The (E) dispersant used in the cosmetic of the present invention (hereinafter, may be simply referred to as "(E) component") is not particularly limited as long as it is usually used as a dispersant in cosmetics, but it is preferably lipophilic (HLB = 7 or less).

[0033] Specific examples include silicone-based dispersants such as polyglyceryl-3 polydimethylsiloxyethyl dimethicone, bisbutyldimethylsilicone polyglyceryl-3, lauryl PEG-9 polydimethylsiloxyethyl dimethicone; sorbitan fatty acid ester-based dispersants such as sorbitan sesquisoisostearate, sorbitan laurate, sorbitan palmitate, sorbitan oleate, sorbitan stearate, sorbitan isostearate, sorbitan sesquioleate, sorbitan trioleate, sorbitan tristearate; polyglycerol fatty acid ester-based dispersants such as polyglyceryl-5 triisostearate, polyglyceryl pentaisostearate, polyglyceryl-10 pentaisostearate, polyglyceryl condensed ricinoleate, polyglyceryl polyricinoleate-6; glycerol fatty acid ester-based dispersants such as glyceryl monostearate, glyceryl monooleate, glyceryl isostearate, diglyceryl diisostearate, decaglyceryl pentaisostearate, etc. One or more selected from these can be used. Among them, it is preferably selected from sorbitan sesquisoisostearate and sorbitan sesquioleate.

[0034] The blending amount of the (E) component can be appropriately adjusted according to the type and amount of the powder to be blended and / or the amount of the oil phase component, etc., and is not particularly limited as long as it is a blending amount generally used in cosmetics for the purpose of dispersing powders and the like. As an example of the blending amount, it is preferably 0.5 to 6% by mass, more preferably 2 to 4% by mass, based on the total amount of the cosmetic.

[0035] In the present invention, an emulsifier used when emulsifying the above-described inner aqueous phase into an outer oil phase can be incorporated. The emulsifier used in the cosmetic of the present invention is not particularly limited as long as it is an emulsifier that can generally be incorporated into a water-in-oil type emulsified composition, but is a lipophilic one (HLB = 7 or less) and is other than the above (E) dispersant. In the following, polyoxyethylene may be abbreviated as "POE" and polyethylene glycol as "PEG".

[0036] Specific examples include polyoxyethylene hydrogenated castor oil such as POE(5), POE(7.5), POE(10) hydrogenated castor oil; dipolyhydroxystearic acid esters: high molecular weight lipophilic activators such as polyglyceryl-2 dipolyhydroxystearate (manufactured by BASF Japan Ltd.: Dehymuls (registered trademark) PGPH), PEG-30 dipolyhydroxystearate (manufactured by Croda Japan Ltd.: Cithrol DPHS); cetyl PEG / PPG-10 / 1 dimethicone (for example, "ABIL EM90" (manufactured by Evonik)), polyether-modified silicone (for example, PEG-10 dimethicone; "KF6017" (manufactured by Shin-Etsu Chemical Co., Ltd.)), crosslinked polyether-modified silicone (for example, "KSG" series (manufactured by Shin-Etsu Chemical Co., Ltd.)) and other polyether-based silicones; polyglycerin-modified silicone, alkyl co-modified polyglycerin-modified silicone and other polyglycerin-based silicones. In the present invention, one or more selected from the above-described emulsifiers having an HLB = 7 or less can be used. In the present invention, the use of a silicone-based emulsifier such as polyether-modified silicone is preferred.

[0037] The blending amount of the emulsifier can be appropriately adjusted according to the types and amounts of the oil phase component and the water phase component, etc., and is not particularly limited as long as it is a blending amount generally used for water-in-oil type emulsified solid cosmetics. As an example of the blending amount, it is preferably 0.5 to 7% by mass, more preferably 2 to 5% by mass, based on the total amount of the cosmetic.

[0038] The internal aqueous phase thickened and gelled by the (B) content of the present invention may be water or a mixture of water and an aqueous solvent, such as a lower alcohol or the like.

[0039] In addition to the (B) content and water or an aqueous solvent, optional components such as a humectant, a stabilizer, various water-soluble drugs, a hydrophilic powder, a water-soluble thickener, etc. can be appropriately blended in the internal aqueous phase.

[0040] Examples of the humectant include 1,3-butylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol (abbreviated as DPG), hexylene glycol, glycerin, diglycerin, xylitol, maltitol, maltose, D-mannitol, trehalose, erythritol, propanediol, glucose, polyoxyethylene methyl glucoside, etc.

[0041] The stabilizer includes a chelating agent, a sequestering agent, a preservative, an antioxidant, etc. Examples of the water-soluble drug include vitamins such as vitamin A, retinol, retinol palmitate, inositol, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, nicotinic acid dl-α-tocopherol, magnesium ascorbyl phosphate, ascorbic acid 2-glucoside, vitamin D2 (ergocalciferol), potassium dl-α-tocopherol 2-L-ascorbic acid phosphate diester, dl-α-tocopherol, dl-α-tocopherol acetate, pantothenic acid, biotin, etc.; anti-inflammatory agents such as allantoin, azulene, glycyrrhetinic acid, etc.; whitening agents such as arbutin, tranexamic acid, potassium 4-methoxysalicylate, etc.; astringents such as zinc oxide, tannic acid, etc.; sulfur, lysozyme chloride, γ-oryzanol, etc.

[0042] The blending amount of the aqueous phase (the total of water or an aqueous solvent and the components mixed in the aqueous solvent) in the water-in-oil type emulsified solid cosmetic of the present invention is generally 1 to 45% by mass, preferably 5 to 40% by mass, and more preferably 10 to 35% by mass.

[0043] The external oil phase of the water-in-oil type emulsified solid cosmetic according to the present invention contains (A) a liquid oil thickened or solidified with wax. The liquid oil in the present invention means an oil that is liquid at normal temperature (25°C) and can be usually used in cosmetics and pharmaceuticals.

[0044] Examples of the liquid oil used in the present invention include liquid fats and oils such as avocado oil, camellia oil, macadamia nut oil, mink oil, olive oil, castor oil, jojoba oil, triglycerin, and glyceryl trioctanoate; hydrocarbons such as liquid paraffin, squalane, and squalene; higher fatty acids such as oleic acid, isostearic acid, linoleic acid, and linolenic acid; higher alcohols such as lauryl alcohol, oleyl alcohol, cholesterol, phytosterol, and isostearyl alcohol; esters oils such as isononyl isononanoate, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, butyl stearate, decyl oleate, ethylene glycol dioctanoate, diisostearyl malate, trimethylolpropane trioctanoate, trimethylolpropane triisostearate, pentaerythrityl tetraoctanoate, glyceryl trioctanoate, glyceryl triisostearate, ethyl acetate, butyl acetate, and amyl acetate; linear silicone oils such as dimethicone, diphenylsiloxy phenyl trimethicone, hydrogen dimethicone, dodecamethyl pentasiloxane, and decamethyl tetrasiloxane; cyclic silicone oils such as decamethyl cyclopentasiloxane, dodecamethyl cyclohexasiloxane, and octamethyl cyclotetrasiloxane, etc. Among these, one or a combination of two or more can be used. In the present invention, it is preferable to blend a linear silicone oil such as dimethicone or diphenylsiloxy phenyl trimethicone as the main component of the liquid oil.

[0045] In the external oil phase of the cosmetic of the present invention, a hydrophobic powder other than the pigment whose surface is hydrophobic as described in (D) above may be blended. The hydrophobic powder in the present specification means a powder obtained by subjecting an extender pigment to surface hydrophobization treatment with silicone, fluorine, Teflon (registered trademark), fatty acid, fatty acid soap, lauroyl lysine, etc., or a powder whose surface is originally hydrophobic such as silicone resin powder, and corresponds to the powder component blended in the external oil phase in a conventional water-in-oil emulsion solid cosmetic. Spherical powders such as silicone resin powder that improve the usability of the cosmetic can be blended in the external oil phase.

[0046] In addition to the liquid oil component and the hydrophobic powder described above, natural or synthetic solid oil components and semi-solid oil components (excluding the above-mentioned (A) wax), oil-soluble ultraviolet absorbers, fat-soluble vitamins, fragrance and other oily components can also be blended in the external oil phase. Here, the semi-solid oil component refers to an oil component that does not show fluidity at normal temperature (25°C) and has a melting point of 30 to 60°C, preferably 30 to 45°C, under 1 atm.

[0047] Examples of the ultraviolet absorber include benzoic acid-based ultraviolet absorbers such as hexyl diethylaminohydroxybenzoyl benzoate; salicylic acid-based ultraviolet absorbers such as homosalate and octyl salicylate; silicic acid-based ultraviolet absorbers such as ethylhexyl methoxycinnamate (octyl paramethoxycinnamate), isopropyl paramethoxycinnamate, and glyceryl diparamethoxycinnamate mono-2-ethylhexanoate; dibenzoylmethane-based ultraviolet absorbers such as 4-tert-butyl-4'-methoxydibenzoylmethane; β,β-diphenylacrylate-based ultraviolet absorbers such as octocrylene; benzophenone-based ultraviolet absorbers such as 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, and oxybenzone-3; benzylidene camphor-based ultraviolet absorbers such as terephthalylidene dicamphor sulfonic acid, 3-(4'-methylbenzylidene)-d,l-camphor, and 3-benzylidene-d,l-camphor; phenylbenzimidazole-based ultraviolet absorbers such as phenylbenzimidazole sulfonic acid; triazine-based ultraviolet absorbers such as bis-ethylhexyloxyphenol methoxyphenyl triazine and ethylhexyl triazone; phenylbenzotriazole-based ultraviolet absorbers such as droxmetrizole trisiloxane, 2-(2-hydroxy-5-methylphenyl) benzotriazole, and methylene bisbenzotriazolyl tetramethylbutylphenol; anthranilic acid-based ultraviolet absorbers such as methyl anthranilate; imidazoline-based ultraviolet absorbers such as ethylhexyl dimethoxybenzylidene dioxoimidazoline propionate; benzalmalonate-based ultraviolet absorbers such as dimethyldiethyl benzalmalonate and polysilicone-15; 4,4-diarylbutadiene-based ultraviolet absorbers such as 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene, and the like.

[0048] In the water-in-oil emulsified solid cosmetic of the present invention, in addition to the above-described components, other optional components that can be incorporated into cosmetics can be incorporated into the inner aqueous phase or the outer oil phase within a range not impairing the effects of the present invention.

[0049] The cosmetic of the present invention can be manufactured according to the methods commonly used for water-in-oil emulsified solid cosmetics. Briefly stated, it can be manufactured by generally the following procedures. (1) Water, an aqueous solvent, a water-soluble thickening agent, and other optional components are mixed while heating if necessary, and then a powder or the like is appropriately added and stirred and mixed with a homomixer or the like to prepare an aqueous phase component. (2) Wax, a liquid oil component, and other optional components are mixed while heating if necessary, and then a hydrophobic powder or the like is added and stirred and mixed with a homomixer or the like to prepare an oil phase component. (3) An emulsifier is optionally added to the oil phase component, the aqueous phase component is added, and the mixture is stirred and mixed using a homomixer or the like to form an emulsion. (4) The emulsion is filled into a container and cooled and solidified to obtain the water-in-oil emulsified solid cosmetic of the present invention.

[0050] The water-in-oil emulsified solid cosmetic of the present invention is suitable for providing as makeup cosmetics such as foundation, concealer, eyeshadow, eyeliner, mascara, and blusher, or as a makeup base or sunscreen. As a form, it can be in a stick shape or a compact shape. Further, the water-in-oil emulsified solid cosmetic of the present invention can also be used as a cushion-type foundation impregnated in a water-insoluble sponge, a foamed foam carrier, or the like.

Examples

[0051] The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto in any way. Unless otherwise specified, the blending amounts are shown in mass% with respect to the system in which the components are blended. Before specifically explaining each example, the evaluation method employed will be described.

[0052] 1. Actual use test Using a puff-shaped applicator, 0.2 g of the sample of each example was applied to the entire face of a professional panelist, and the feel during application (moistness, lightness of stretching (ease of spreading), stickiness) and the lack of makeup collapse (fit) 4 hours after application were evaluated according to the following criteria. A: 8 - 10 out of 10 people answered that it is fresh, has good elongation, a proper fit, and no stickiness. B: 5 - 7 out of 10 people answered that it is fresh, has good elongation, a proper fit, and no stickiness. C: 2 - 4 out of 10 people answered that it is fresh, has good elongation, a proper fit, and no stickiness. D: 0 - 1 out of 10 people answered that it is fresh, has good elongation, a proper fit, and no stickiness.

[0053] 2. Ease of layering After applying 0.2 g of the sample of each example to the entire face of a professional panelist using a puff-shaped applicator, another 0.2 g of the sample was taken with the applicator and applied to the entire face again, and it was observed whether the makeup film formed by the sample previously applied to the skin was distorted. The observation results were evaluated according to the following criteria. A: 8 - 10 out of 10 people answered that the makeup film on both cheeks, nose, and around the mouth was not disrupted. B: 5 - 7 out of 10 people answered that the makeup film on both cheeks, nose, and around the mouth was not disrupted. C: 2 - 4 out of 10 people answered that the makeup film on both cheeks, nose, and around the mouth was not disrupted. D: 0 - 1 out of 10 people answered that the makeup film on both cheeks, nose, and around the mouth was not disrupted.

[0054] 3. Molding property evaluation After preparing the cosmetic of each formulation, it was filled into a wide-mouth container and observed whether it solidified. Those that solidified were marked as "OK" in the table, and those that did not solidify were marked as "NG".

[0055] An oil-in-water type emulsified solid cosmetic (foundation) having the composition shown in Table 1 below was prepared. Specifically, after mixing the oily components while heating, a powder component was added to obtain a uniformly dispersed oily component mixture (oil phase). Separately, an aqueous component mixture (water phase) obtained by mixing and dissolving was added to the oily component mixture, emulsified with a homomixer, etc., and the resulting emulsion was filled into a wide-mouth container and gradually cooled to prepare an oil-in-water type emulsified solid cosmetic. For the prepared samples, each characteristic was evaluated according to the above-described evaluation method. The results are shown together in the table.

[0056]

Table 1

[0057] Comparative Example 1 described in Table 1 is an example of a general water-in-oil emulsified solid cosmetic. When (B) kantan is blended into the aqueous phase of the cosmetic of Comparative Example 1, as the blending amount increases, the freshness, lightness of stretch, and fit feeling improve, but stickiness occurs and makeup smudging occurs when layered (Comparative Examples 2 and 3). Also, when the blending ratio of (B) kantan increases, there is a problem that it does not solidify (Comparative Examples 4 and 7). When xanthan gum, which is a polysaccharide used as a water-soluble thickener, is used instead of (B) kantan of the present invention, sufficient freshness cannot be obtained (Comparative Example 5). On the other hand, when (C) trimethylsiloxysilicate is blended at a certain blending ratio in addition to (A) wax and (B) kantan, a water-in-oil emulsified solid cosmetic can be obtained in which the disadvantages (occurrence of stickiness, makeup smudging) due to the blending of (B) kantan are suppressed without impairing the advantages of the feel of use due to the blending of (B) kantan (Examples 1 to 6). In addition, when the blending mass ratio ((C) / (B)) of (B) kantan and (C) trimethylsiloxysilicate is less than 0.3, stickiness is not sufficiently suppressed and it is not suitable for layering (Comparative Examples 6 and 7).

Claims

1. (A) wax, (B) carrageenan, and (C) trimethylsiloxysilicic acid, comprising, wherein the mixing ratio ((A) / (B)) of the component (A) to the component (B) is 4 to 150 in terms of mass ratio, and the mixing ratio ((C) / (B)) of the component (C) to the component (B) is 0.3 to 30 in terms of mass ratio, a water-in-oil type emulsified solid cosmetic.

2. Furthermore, containing (D) a pigment having a hydrophobic surface, the water-in-oil type emulsified solid cosmetic according to Claim 1.

3. Furthermore, containing (E) a dispersant, the water-in-oil type emulsified solid cosmetic according to Claim 1.

4. The water-in-oil type emulsified solid cosmetic according to Claim 2, wherein the component (D) is dispersed in the oil phase.

5. The water-in-oil type emulsified solid cosmetic according to Claim 1, wherein the component (A) is one or more selected from the group consisting of polyethylene wax, microcrystalline wax, and paraffin wax.

6. The water-in-oil type emulsified solid cosmetic according to Claim 3, wherein the component (E) is one or more selected from the group consisting of silicone-based dispersants, sorbitan fatty acid ester-based dispersants, polyglycerin fatty acid ester-based dispersants, and glycerin fatty acid ester-based dispersants.

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