Water-in-oil type emulsified solid cosmetic

Abstract

One embodiment of the present invention is a water-in-oil type emulsified solid cosmetic comprising an inner aqueous phase in which a powder having an average primary particle diameter of 1.0 [mu] m or more is dispersed in an aqueous medium and an outer oil phase in which the powder is tackified or cured with a wax.

Description

Technical Field

[0001] The present invention relates to water-in-oil emulsified solid cosmetics. Background Art

[0002] Solid cosmetics are dosage forms used for various items such as skin care cosmetics and makeup cosmetics. For example, in makeup cosmetics, consumers tend to demand a variety of qualities in terms of color and texture. In recent years, as a finished texture when applying makeup cosmetics to the skin, a matte feeling in which the skin looks glossy and has a neat texture is required. In order to obtain a matte finish, research is generally conducted to make solid cosmetics contain various powders.

[0003] For example, Patent Document 1 discloses an oily solid cosmetic comprising a mixture of low melting point wax, plate-like powder, and spherical powder. The oily solid cosmetic of Patent Document 1 obtains a natural matte feel by mixing these components in specific amounts.

[0004] [Prior art literature]

[0005] [Patent Literature]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2000-119134 Summary of the invention

[0007] [Problems to be solved by the invention]

[0008] However, conventional solid cosmetics containing powders provide a matte finish after application to the skin, but have the problem that they spread heavily during application and give the user a dry feeling.

[0009] An object of one embodiment of the present invention is to provide a water-in-oil emulsified solid cosmetic that spreads lightly when applied to the skin, giving the user a moist feeling, and at the same time, provides a matte finish after application.

[0010]

Methods to solve the problem

[0011] One embodiment of the present invention is a water-in-oil emulsified solid cosmetic comprising an inner aqueous phase in which powder is dispersed in an aqueous medium and an outer oil phase thickened or solidified with wax, wherein the average primary particle size of the powder is 1.0 μm or more.

[0012] [Effects of the Invention]

[0013] One embodiment of the present invention can provide a water-in-oil emulsified solid cosmetic that spreads lightly when applied to the skin, giving the user a moist feeling, and at the same time, provides a matte finish after application. DETAILED DESCRIPTION

[0014] Hereinafter, embodiments of the present invention will be described in detail. In addition, the embodiments are not limited by the following description and can be appropriately changed without departing from the gist of the present invention. In addition, the " to " indicating a numerical range in this specification, if there is no other description, refers to the numerical values ​​recorded before and after it as the lower limit and upper limit included.

[0015] The water-in-oil emulsified solid cosmetics according to the present embodiment contain an internal water phase in which powder is dispersed in an aqueous medium and an external oil phase thickened or solidified by wax. In addition, the term "solid" used in this specification is interpreted as the meaning commonly used in the field of cosmetics, for example, it can be defined as a form or state in which the composition as a whole does not show fluidity at a temperature below 50°C and does not show significant deformation under normal storage conditions.

[0016] Hereinafter, each component constituting the water-in-oil emulsified solid cosmetic of the present invention will be described in detail.

[0017] Powder refers to a powder that is generally used in cosmetics and pharmaceuticals and has a hydrophilic surface that can be stably dispersed in an aqueous system. The hydrophilic surface powder includes a hydrophilic powder that has not been subjected to a surface hydrophobic treatment and a hydrophobic or hydrophilic powder that has been surface treated with a hydrophilic substance. In addition, in this specification, powder refers to the powder contained in the internal water phase.

[0018] The average primary particle size of the powder is 1.0 μm or more. The water-in-oil emulsified solid cosmetic of this embodiment will be emulsified when applied to the skin, so it spreads lightly and can give the user a moist feeling. After the water-in-oil emulsified solid cosmetic is applied to the skin, the emulsified water-in-oil emulsified solid cosmetic forms an oil phase on the skin and a water phase on the oil phase. Then, the water in the water phase evaporates, and the powder with an average primary particle size of 1.0 μm or more contained in the water phase remains in the oil phase covering the skin, thereby giving the water-in-oil emulsified solid cosmetic a matte finish.

[0019] In this specification, the average primary particle size refers to the average of primary particle sizes measured by a generally used method, and is specifically determined as the arithmetic average of the major axis and the minor axis of the particles from a transmission electron microscope photograph.

[0020] The average primary particle size of the powder is preferably 1.0 μm to 50.0 μm, more preferably 1.5 μm to 13 μm. The average primary particle size of the powder is 1.0 μm to 50 μm, and the oil-in-water emulsified solid cosmetic spreads more lightly when applied to the skin, giving the user a more moisturized feel. In addition, the average primary particle size of the powder is 1.5 μm to 13 μm, and the oil-in-water emulsified solid cosmetic spreads more lightly when applied to the skin, giving the user a further moisturized feel, and at the same time, a matte finish can be given after application.

[0021] The content of the powder is preferably 1% to 25% by mass, more preferably 1% to 20% by mass, and further preferably 5% to 15% by mass relative to the water-in-oil emulsified solid cosmetic. When the content of the powder is 1% to 25% by mass relative to the water-in-oil emulsified solid cosmetic, the water-in-oil emulsified solid cosmetic spreads more lightly when applied to the skin, giving the user a more moisturized feel, and at the same time, a more matte finish can be given after application.

[0022] The shape of the powder may be plate-like or spherical. Examples of the powder include talc, kaolin, sericite, mica (muscovite, synthetic mica, synthetic phlogopite, phlogopite, red mica, biotite, lithium mica treated with triethoxysilylethyl polydimethylsiloxyethyl dimethylsiloxane), vermiculite, magnesium carbonate, calcium carbonate, diatomaceous earth, magnesium silicate, calcium silicate, aluminum silicate, barium silicate, strontium silicate, calcium myristate, tungstate metal salts, silicon dioxide, silicone, cellulose powder, hydroxyapatite, zeolite, boron nitride, ceramic powder, and inorganic powders such as lauroyl lysine. One or more of these may be used in combination.

[0023] Among them, the powder preferably contains one or more selected from mica, silicon dioxide, silicone, talc, cellulose powder and lauroyl lysine. Thus, the water-in-oil emulsified solid cosmetic can give a matte finish after application.

[0024] The powder is more preferably an inorganic powder. Thus, the water-in-oil emulsified solid cosmetic can be further given a matte finish after application.

[0025] The aspect ratio of mica is preferably 10 to 80, more preferably 20 to 60. By the aspect ratio of mica being 10 to 80, the water-in-oil type emulsified solid cosmetic can be further given a matte finish after coating.

[0026] Examples of the silicone used in the powder include (diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane) crosslinked polymers, (dimethicone / vinyl dimethicone) crosslinked polymers, (vinyl dimethicone / dimethicone silsesquioxane) crosslinked polymers, and (diphenyl dimethicone / vinyl diphenyl dimethicone / silsesquioxane) crosslinked polymers. Commercially available products thereof include the KSP series (KSP-100, KSP-101, KSP102, KSP-105, KSP-300, KSP-411, KSP-441 (manufactured by Shin-Etsu Chemical Co., Ltd.)).

[0027] The aqueous medium for dispersing the powder may be water or water and a lower alcohol, or a mixture with other aqueous media. The content of the aqueous medium in the water-in-oil emulsified solid cosmetic is preferably 1% to 70% by mass, more preferably 3% to 60% by mass, and further preferably 5% to 50% by mass. The powder can be fully dispersed by setting the content of the aqueous medium in the water-in-oil emulsified solid cosmetic to 1% to 70% by mass.

[0028] The internal aqueous phase may further contain other optional components in addition to the powder and the aqueous medium. The other optional components are not limited, and examples thereof include various water-soluble components such as moisturizers, thickeners, dispersants, preservatives, drugs, stabilizers, etc.

[0029] As moisturizers, for example, 1,3-butylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol (DPG for short), hexylene glycol, glycerol, diglycerol, xylitol, maltitol, maltose, D-mannitol, trehalose, erythritol, propylene glycol, glucose, polyoxyethylene methyl glucoside, etc. By including moisturizers in the inner water phase, a matte finish can be maintained after application while giving the user's skin a more moisturizing feeling.

[0030] Examples of the thickener include plant polymers such as xanthan gum, cellulose gum, gum arabic, carrageenan, pectin, agar, quince seed (marmelo) extract, starch, algae colloid (brown algae extract), mucopolysaccharides, tremella polysaccharides, succinoglycan, microbial polymers such as dextran and pullulan, animal polymers such as collagen, casein, gelatin, starch polymers such as carboxymethyl starch and methyl hydroxypropyl starch, alginic acid polymers such as sodium alginate, vinyl polymers such as carboxyvinyl polymer (carbomer), polyoxyethylene polymers, polyoxyethylene-polyoxypropylene copolymer polymers, acrylic polymers such as sodium polyacrylate and polyacrylamide, and inorganic water-soluble polymers such as bentonite, aluminum magnesium silicate, and laponite.

[0031] The content of the thickener is preferably in the range of 0.005% to 3% by mass, more preferably 0.05% to 2.8% by mass, relative to the water-in-oil emulsified solid cosmetic. In addition, the lower limit of the content range may be 0.005% by mass, preferably 0.01% by mass, more preferably 0.05% by mass, and further preferably 0.1% by mass, and the upper limit combined with any one of these lower limits may be 3% by mass, preferably 2.8% by mass.

[0032] A dispersant is a substance that is adsorbed on the surface of a powder and can make the powder disperse uniformly in an aqueous medium without agglomerating. As a dispersant, any aqueous dispersant commonly used in cosmetics and pharmaceuticals may be used, and examples thereof include fatty acid soaps, nonionic surfactants, condensed phosphoric acid compounds, polycarboxylic acid compounds (ammonium polycarboxylates, etc.), amino acid compounds, polyacrylic acid compounds, amines (amino alcohols, etc.), etc.

[0033] Examples of fatty acid soaps include sodium laurate, sodium myristic acid, sodium palmitate, sodium stearate, potassium laurate, potassium myristic acid, potassium palmitate, potassium stearate, calcium stearate, etc. Alternatively, caustic potash or caustic soda may be mixed first, and fatty acids such as lauric acid, myristic acid, palmitic acid and / or stearic acid may be added thereto, thereby allowing the mixture to function as a fatty acid soap when the aqueous phase is prepared.

[0034] Examples of the nonionic surfactant include POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan tetraoleate and other POE-sorbitan fatty acid esters, POE-sorbitan monolaurate, POE-sorbitan monooleate, POE-sorbitan pentaoleate, POE-sorbitan monostearate and other POE-sorbitan fatty acid esters, POE-glycerol monostearate, POE-glycerol fatty acid esters such as POE-monooleate such as POE-glyceryl monoisostearate and POE-glyceryl triisostearate, POE-fatty acid esters such as POE-distearate, POE-monodioleate, and ethylene glycol distearate, Pluronic-type esters such as Pluronic (registered trademark), POE·POP-hexadecyl ether, POE·POP-2-decyltetradecyl ether, POE·POP-monobutyl ether, POE·POP-hydrogenated lanolin, POE·POP-alkyl ethers such as POE·POP-glyceryl ether, tetra-POE·tetra-POP-ethylenediamine condensates such as Tetronic, POE-castor oil, POE-hydrogenated castor oil, POE-hydrogenated castor oil monoisostearate, POE-hydrogenated castor oil triisostearate, POE-hydrogenated castor oil monopyroglutamic acid monoisostearate diester, POE-hydrogenated castor oil maleic acid, etc. Hydrophilic (HLB (hydrophile-lipophile balance) = 8 or more, preferably 10 or more) nonionic surfactants such as hydrogenated castor oil derivatives, POE-sorbitol beeswax and the like, coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide and the like, POE-propylene glycol fatty acid esters, POE-alkylamines, POE-fatty acid amides, alkylethoxydimethylamine oxides; trioleyl phosphate and the like.

[0035] Examples of the condensed phosphoric acid compound include trisodium phosphate, sodium pyrophosphate, and sodium hexametaphosphate.

[0036] Examples of the preservative include phenoxyethanol.

[0037] Examples of the drug include vitamins such as vitamin A, vitamin B3 (niacinamide), retinol, retinyl palmitate, inositol, pyridoxine hydrochloride, benzyl nicotinate, niacinamide, DL-α-tocopheryl nicotinate, magnesium ascorbyl phosphate, ascorbic acid 2-glucoside, vitamin D2 (ergocalciferol), dl-α-tocopherol 2-L ascorbyl phosphate diester potassium salt, dl-α-tocopherol, dl-α-tocopherol acetate, pantothenic acid, and biotin; anti-inflammatory agents such as allantoin, azulene, and glycyrrhetinic acid; whitening agents such as arbutin, tranexamic acid, and potassium 4-methoxysalicylate; astringents such as zinc oxide and tannic acid; sulfur, lysozyme chloride, pyridoxine hydrochloride, and γ-oryzanol.

[0038] The wax can be selected from waxes conventionally used for cosmetics. Examples of the wax include solid fats and oils such as cocoa butter, coconut oil, horse oil, hydrogenated coconut oil, palm oil, beef tallow, sheep tallow, hydrogenated castor oil, and hydrogenated vegetable oil, paraffin wax (straight chain hydrocarbon), microcrystalline wax (branched chain saturated hydrocarbon), ceresin, wood wax, Fischer-Tropsch wax, and other hydrocarbons, beeswax, lanolin, carnauba wax, candelilla wax, rice bran wax (RICE wax), spermaceti, jojoba oil, bran wax, montan wax, kapok wax, bayberry wax, shellac wax, sugarcane wax, and tomentosa wax. Sunflower seed wax, lanolin fatty acid isopropyl ester, hexyl laurate, reduced lanolin, hard lanolin, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol ester, POE hydrogenated lanolin alcohol ether and other waxes, myristic acid, palmitic acid, stearic acid, behenic acid, hydroxystearic acid and other higher fatty acids, hexadecyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, cetostearyl alcohol and other higher alcohols. They can be used in combination of one or more. Among them, paraffin (straight chain hydrocarbon), microcrystalline wax, rice bran wax (RICE wax), hydroxystearic acid, hydrogenated castor oil, hydrogenated vegetable oil are preferred.

[0039] The wax content is preferably 0.1% to 40% by mass, more preferably 1% to 35% by mass, and further preferably 2% to 25% by mass relative to the water-in-oil emulsified solid cosmetic. When the wax content is 0.1% to 40% by mass relative to the water-in-oil emulsified solid cosmetic, the water-in-oil emulsified solid cosmetic can be thickened or solidified to an appropriate hardness, and can exhibit good usability.

[0040] The outer oil phase of the water-in-oil emulsified solid cosmetic can be thickened or solidified with wax and gelling agent. As gelling agent, oily gelling agents such as organic modified clay minerals, 12-hydroxystearic acid, starch fatty acid ester, dimethyl polysiloxane polymer, dextrin fatty acid ester, etc. can be cited, and these can be used alone or in combination of two or more.

[0041] The total content of wax and gelling agent is preferably 0.1% to 40% by mass, more preferably 1% to 35% by mass, and further preferably 2% to 25% by mass relative to the water-in-oil emulsified solid cosmetic. When the total content of wax and gelling agent is 0.1% to 40% by mass relative to the water-in-oil emulsified solid cosmetic, the water-in-oil emulsified solid cosmetic can be thickened or solidified to an appropriate hardness, and can exhibit good usability.

[0042] The outer oil phase of water-in-oil emulsified solid cosmetics contains wax, or liquid oil thickened or solidified by wax and a gelling agent. Here, liquid oil refers to oil that is liquid at room temperature (25°C) and is generally used in cosmetics and pharmaceuticals.

[0043] Examples of the liquid oil component include liquid oils such as avocado oil, camellia oil, macadamia oil, mink oil, olive oil, castor oil, jojoba oil, triglycerides, and tricaprylin, hydrocarbons such as liquid paraffin, squalane, paraffin, ceresin, and squalene, higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, isostearic acid, linoleic acid, and linolenic acid, higher alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, oleyl alcohol, monostearyl glyceryl ether, monopalmitoyl glyceryl ether, cholesterol, phytosterol, and isostearyl alcohol, tri(caprylic acid / capric acid)glyceryl, pentaerythritol tetraethylhexanoate, isononanoic acid, and the like. Ester oils such as nonyl ester, isopropyl myristate, hexadecyl octanoate, octyldodecyl myristate, butyl stearate, decyl oleate, dioctyl glycol, diisostearyl malate, trimethylolpropane trioctanoate, trimethylolpropane triisostearate, tricaprylyl, triisostearate, pentaerythritol tetraoctanoate, ethyl acetate, butyl acetate, amyl acetate, etc., linear silicone oils such as dimethylpolysiloxane, methylpolysiloxane (polydimethylsiloxane), methylphenylpolysiloxane, methylhydrogenpolysiloxane, etc., cyclic silicone oils such as decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, octamethylcyclotetrasiloxane, etc. These can be used alone or in combination of two or more. Among them, it is preferable to mix linear silicone oils such as dimethylpolysiloxane, dodecamethylpentasiloxane, decamethyltetrasiloxane, and pentaerythritol tetraoctanoate, and cyclic silicone oils such as decamethylcyclopentasiloxane as the main component of the liquid oil.

[0044] The outer oil phase preferably contains more than 15% by mass of residual oil relative to the water-in-oil emulsified solid cosmetic. Here, the residual oil refers to the non-volatile liquid oil in the liquid oil. As the non-volatile liquid oil, for example, tri(caprylic acid / capric acid)glyceryl, tetraethylhexanoic acid pentaerythritol ester, etc., as the volatile liquid oil, for example, polydimethylsiloxane. By containing more than 15% by mass of residual oil relative to the water-in-oil emulsified solid cosmetic in the outer oil phase, the water-in-oil emulsified solid cosmetic can give a matte finish after application, while giving the user's skin a moisturizing feel. In particular, when the water-in-oil emulsified solid cosmetic is a lipstick, the outer oil phase preferably contains more than 15% by mass of residual oil relative to the water-in-oil emulsified solid cosmetic.

[0045] The outer oil phase preferably contains a colorant. Examples of the colorant include inorganic white pigments (titanium dioxide, zinc oxide), inorganic red pigments (iron oxide (ferric oxide), iron titanate), inorganic brown pigments (γ-iron oxide), inorganic yellow pigments (yellow iron oxide, ochre), inorganic black pigments (black iron oxide, carbon, low-order titanium oxide), inorganic purple pigments (mango purple, cobalt purple), inorganic green pigments (chromium oxide, chromium hydroxide, cobalt titanate), inorganic cyan pigments (ultramarine, cyan), pearl pigments (titanium oxide coated mica, titanium oxide coated bismuth oxychloride, titanium oxide coated talc, colored titanium oxide coated mica, bismuth oxychloride, fish scale foil), metal powder pigments (aluminum powder, copper powder), organic pigments (Red No. 202, Red No. 205, Red No. 220, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, Cyan No. 404), organic pigments of zirconium, barium, and aluminum lakes (Red No. 3, Red No. 104, Red No. 227, Red No. 401, Orange No. 205, Yellow No. 4, Yellow No. 202, Green No. 3, Cyan No. 1), natural pigments (chlorophyll, carotenoids (β-carotene), safflower, cochineal, chalcone, curcumin, betanin, flavonol, flavonoid, anthocyanin, anthraquinone, naphthoquinone), functional pigments (boron nitride, photochromic pigments, synthetic fluorphlogopite, synthetic fluorphlogopite containing iron, microparticle composite powder (mixed fine powder)), oil-soluble dyes, etc. These can be used alone or in combination of two or more.

[0046] Among them, as a colorant, an organic pigment or an oil-soluble dye is preferred, and the outer oil phase preferably contains an organic pigment or an oil-soluble dye. By containing an organic pigment or an oil-soluble dye in the outer oil phase, the water-in-oil emulsified solid cosmetic can maintain a matte finish after being applied to the skin, while stably exerting bright color development.

[0047] The content of the colorant is preferably 0.005% to 30% by mass, more preferably 0.01% to 25% by mass, and further preferably 0.01% to 15% by mass relative to the water-in-oil emulsified solid cosmetic. When the content of the organic pigment is 0.005% to 30% by mass relative to the water-in-oil emulsified solid cosmetic, the cosmetic spreads more lightly when applied to the skin, giving the user a more moisturized feel.

[0048] The outer oil phase may contain 15% or less of semi-solid oil relative to the water-in-oil emulsified solid cosmetic. The content of the semi-solid oil is more preferably 0.1% to 20% by mass relative to the water-in-oil emulsified solid cosmetic. Here, the semi-solid oil refers to an oil having a melting point above room temperature (25°C), not completely solidified at room temperature, and distinguished from liquid oil and solid oil. In addition, the semi-solid oil does not contain wax and gelling agent. As semi-solid oil, for example, pentaerythritol tetra(behenic acid / benzoic acid / ethylhexanoic acid) ester, dipentaerythritol hexahydroxystearate, dipentaerythritol tetra(hydroxystearate / isostearate) ester, etc. pentaerythritol fatty acid ester, macadamia oil fatty acid phytosterol (macadamia oil polyglycerol-6 behenate, etc.), dimer dilinoleic acid (phytosterol / behenyl) ester, etc. dimer dilinoleate, lanolin, shea butter, vaseline, partially hydrogenated coconut oil, etc. vegetable oil, partially hydrogenated jojoba oil, di-diglyceryl polyacyl adipate-2, etc. can be cited. By containing a semi-solid oil of 15% or less by mass relative to the water-in-oil emulsified solid cosmetics in the outer oil phase, the water-in-oil emulsified solid cosmetics can maintain a matte finish after application, while giving the user's skin a moisturizing feel. The water-in-oil emulsified solid cosmetics may also not contain semi-solid oil.

[0049] The outer oil phase may contain a film-forming agent in an amount of 20% by mass or less relative to the water-in-oil emulsified solid cosmetic. As a film-forming agent, there is no particular limitation if it is used in general cosmetics. As a film-forming agent, for example, trimethylsiloxysilicate, dimethylaminomethacrylate quaternary salt, vinylpyrrolidone·methacrylic acid-N,N-dimethyl-ethylaminoethyl ester copolymer, silicone / polyether polyurethane resin, (methacryloyloxyethyl carboxybetaine / methacrylate alkyl ester) copolymer, dextrin, (vinylpyrrolidone / VA) copolymer, acrylic acid alkyl copolymer ammonium, polyvinyl alcohol, polyethyl acrylate, (acrylate / octyl acrylic acid amide) copolymer, (acrylate / methacrylate propyl trimethylsiloxane) copolymer, polyvinyl acetate, (acrylate / polydimethylsiloxane) copolymer, 3-[tri(trimethylsiloxane) silyl] propylcarbamate pullulan, polyether grafted acrylic silicone, fluorine-modified silicone resin, etc. can be cited. By containing a film-forming agent in an amount of 20% by mass or less relative to the water-in-oil emulsified solid cosmetic, the water-in-oil emulsified solid cosmetic can maintain a matte finish after application while giving the user's skin a moisturizing feeling. The water-in-oil emulsified solid cosmetic may not contain a film-forming agent.

[0050] The water-in-oil emulsified solid cosmetic may contain a surfactant for emulsifying the inner water phase into the outer oil phase. As the surfactant, an emulsifier generally miscible with a water-in-oil emulsified composition, i.e., a lipophilic emulsifier (HLB=7 or less) may be used. Specific examples include sorbitan fatty acid esters such as sorbitan monolaurate, sorbitan monooleate, sorbitan monoisostearate, sorbitan tristearate, and sorbitan sesquiisostearate; glycerol fatty acid esters such as glyceryl monostearate, glyceryl monooleate, glyceryl isostearate, diglyceryl diisostearate, and decaglyceryl pentaisostearate; polyoxyethylene hydrogenated castor oils such as POE (5), POE (7.5), and POE (10) hydrogenated castor oils and PEG-60 hydrogenated castor oils; dipolyhydroxystearates; high molecular weight lipophilic active agents such as dipolyhydroxystearate polyglyceryl-2 (PGPH, manufactured by Cognis) and PEG30 dipolyhydroxystearate (ARLACEL P135, manufactured by Unikema); and cetyl dimethicone copolyol (e.g., ABIL EM90, manufactured by Goldschmidt Co., Ltd.), polyether-modified silicones such as hexadecyl PEG / PPG-10 / 1 dimethicone and PEG-10 dimethicone (for example, KSG series, manufactured by Shin-Etsu Chemical Co., Ltd.), polyether-modified silicones such as cross-linked polyether-modified silicones (for example, KSG series, manufactured by Shin-Etsu Chemical Co., Ltd.), polyglycerin-modified silicones, and polyglycerin-modified silicones such as alkyl co-modified polyglycerin-modified silicones.

[0051] The water-in-oil emulsified solid cosmetic may be mixed with any other ingredients that can be mixed with cosmetics in addition to the above-mentioned ingredients, in the inner water phase or the outer oil phase, within a range that does not impair the effects of the present embodiment.

[0052] The method for producing the water-in-oil emulsified solid cosmetic may be a method according to a commonly used method. The outline of the production method is described below.

[0053] (1) After mixing the aqueous medium and other optional components while heating as necessary, the powder is added and stirred and mixed using a homomixer or the like to prepare the aqueous phase component.

[0054] (2) The wax and other optional ingredients are mixed while heating as necessary to prepare the oil phase component.

[0055] (3) An emulsifier is optionally added to the oil phase component, and the water phase component is added, and the mixture is stirred and mixed with a homomixer or the like to form an emulsion.

[0056] (4) The obtained emulsion is filled into a container and cooled to solidify, thereby obtaining the water-in-oil emulsified solid cosmetic of the present embodiment.

[0057] The water-in-oil emulsified solid cosmetic of this embodiment can be a makeup cosmetic such as lipstick, lip gloss, foundation, eye shadow, eyeliner, mascara, blush, concealer, skin care cosmetics, makeup base, hair cosmetics, etc. Among them, if the water-in-oil emulsified solid cosmetic is a makeup cosmetic, the effect is significantly shown, and further, if it is a lipstick, it spreads lightly when applied to the skin, giving the user a moist touch, and at the same time, it gives a matte finish after application. Such an effect is significantly shown, so it is suitable. In addition, the shape of the water-in-oil emulsified solid cosmetic of this embodiment is not particularly limited, and it can be a paste or stick filled in a wide-mouth container.

[0058] [Example]

[0059] Hereinafter, the embodiment will be described in more detail with reference to Examples and Comparative Examples, but the embodiment is not limited to these Examples and Comparative Examples.

[0060] According to the compositions shown in Tables 1 to 4, water-in-oil emulsified solid cosmetics were prepared by the following method, and each of the obtained water-in-oil emulsified solid cosmetics was evaluated by the following method. The details of the main components shown in Tables 1 to 4 are as follows. In the present specification and the table, the particle size refers to the average primary particle size.

[0061] ·Synthetic phlogopite (particle size 2.4-2.9 μm) (Mica STY, made by TOPY Industries)

[0062] ·Synthetic phlogopite (particle size 12.5 μm) (Mica ST (HS), manufactured by TOPY Industries, Ltd.)

[0063] ·Synthetic phlogopite treated with triethoxysilylethyl polydimethylsiloxyethyl polydimethylsiloxane (particle size 11.3 μm) (SWD-Mica STY, manufactured by TOPY Industries)

[0064] Silica (particle size 0.55 μm) (COSMO55, manufactured by JGC Catalysts & Chemicals Co., Ltd.)

[0065] Silica (particle size 1 μm) (TMS-01, manufactured by TAYCA)

[0066] Silica (particle size 5 μm) (SATINIER M5, manufactured by JGC Catalysts & Chemicals Co., Ltd.)

[0067] · Myristic acid Calcium (particle size 7-11 μm) (MIRIKARU MB, manufactured by NOF Corporation)

[0068] Cellulose (particle size 5 to 25 μm) (CELLU-FLOW C-25, manufactured by CHISSO KK)

[0069] ·Polydimethylsiloxane (Silicone KF-96A-1.5CS)

[0070] · Caprylic / capric triglyceride (ODO)

[0071] Distearyl malate (COSMOL (registered trademark) 222, manufactured by Nissin Oillio Group)

[0072] · Pentaerythritol tetraethylhexanoate (RA-PE-408, manufactured by Nippon Seika Co., Ltd.)

[0073] Paraffin (Paramix 91)

[0074] · Glycerin (DYNAMITE GLYCERINE, manufactured by NOF Corporation)

[0075] ·DPG (dipropylene glycol, manufactured by ADEKA)

[0076] ·Xanthan gum (KELTROL (registered trademark), manufactured by Kelco)

[0077] · Silica dimethyl silylate (Aerosil (registered trademark) R972)

[0078] Hexadecyl PEG / PPG-10 / 1 Polydimethylsiloxane (Silicone KF6048)

[0079] · PEG-60 hydrogenated castor oil (NIKKOL (registered trademark) HCO-60)

[0080] · Stearic acid calcium (calcium stearate, manufactured by Tamnan Chemical Industry Co., Ltd.)

[0081] ·Niacinamide (Silicone KF-96A-1.5CS)

[0082] ·Macadamia Oil Polyglyceryl-6 Behenate (S FACE VL-211)

[0083] ·Trimethylsiloxysilicate (component A of SSD-R2-ID)

[0084] ·Isododecane (component B of SSD-R2-ID)

[0085] <Preparation of water-in-oil emulsified solid cosmetics>

[0086] According to the compositions shown in Tables 1 to 4, the ingredients were placed in a beaker and mixed at room temperature (25° C.) to obtain water-in-oil emulsified solid cosmetics of Examples 1 to 18 and Comparative Examples 1 and 2.

[0087] <Evaluation>

[0088] The oil-in-water emulsified solid cosmetics of Examples 1 to 18 and Comparative Examples 1 and 2 were applied to the lips of 5 members of a specialized evaluation panel, and the application feeling, matte feeling after application, and moisturizing feeling were evaluated according to the following evaluation criteria. Here, the application feeling refers to an evaluation item that comprehensively considers the degree of spread and moisturizing during application. Then, with a being 4 points, b being 3 points, c being 2 points, and d being 1 point, the average score of the evaluation results of the 5 members of the specialized evaluation panel was calculated and evaluated based on the following evaluation criteria. C or above is qualified, and the evaluation results are shown in Tables 1 to 4.

[0089] [Evaluation criteria for matte finish]

[0090] a: Very matte

[0091] b: Matte finish

[0092] c: slightly matte

[0093] d: shiny

[0094] [Evaluation criteria for application feeling]

[0095] a: It feels very good to apply

[0096] b: It feels good to apply

[0097] c: It feels slightly better when applied

[0098] d: It feels bad to apply

[0099] [Evaluation criteria for moisturizing feeling]

[0100] a: Very moisturizing

[0101] b: Moisturizing

[0102] c: Slightly moisturizing

[0103] d: No moisturizing feeling (dry)

[0104] [Evaluation criteria for average score]

[0105] A: The average score is 3.5 or above

[0106] B: The average score is 2.5 points or more but less than 3.5 pointsC: The average score is 1.5 points or more but less than 2.5 pointsD: The average score is less than 1.5 points

[0107]

Table 1

[0108]

[0109]

Table 2

[0110]

[0111]

Table 3

[0112]

[0113]

Table 4

[0114]

[0115] As shown in Tables 1 to 4, the water-in-oil emulsified solid cosmetics of Examples 1 to 18 showed good results in terms of matte feeling, application feeling and moisturizing feeling. On the other hand, the water-in-oil emulsified solid cosmetic of Comparative Example 1 having a powder particle size of less than 1.0 μm and the water-in-oil emulsified solid cosmetic of Comparative Example 2 containing no powder had a glossy finish and were extremely poor in matte feeling.

[0116] As described above, the embodiments are described, but the above embodiments are given as examples, and the present invention is not limited by the above embodiments. The above embodiments can be implemented in various other forms, and various combinations, omissions, substitutions, changes, etc. can be made without departing from the scope of the gist of the invention. These embodiments and their variations belong to the scope and gist of the invention, and also belong to the invention recorded in the patent claims and their equivalent scope.

[0117] This international application claims priority based on Japanese Patent Application No. 2022-113474 filed on July 14, 2022, the entire contents of which are incorporated herein by reference.

Claims

1. A water-in-oil emulsified solid cosmetic comprising an inner water phase for dispersing powder in an aqueous medium and an outer oil phase thickened or solidified with wax, The average primary particle size of the powder is 1.0 μm or more.

2. The water-in-oil emulsified solid cosmetic according to claim 1, wherein the powder comprises one or more selected from mica, silicon dioxide, silicone, talc, cellulose powder and lauroyl lysine.

3. The water-in-oil emulsified solid cosmetic according to claim 1 or 2, wherein the powder is an inorganic powder.

4. The water-in-oil emulsified solid cosmetic according to claim 1 or 2, wherein the outer oil phase contains a colorant.

5. The water-in-oil emulsified solid cosmetic according to claim 4, wherein the colorant contains an organic pigment or an oil-soluble dye.

6. The water-in-oil emulsified solid cosmetic according to claim 1 or 2, wherein the outer oil phase contains 15% by mass or more of residual oil based on the water-in-oil emulsified solid cosmetic.

7. The water-in-oil emulsified solid cosmetic according to claim 1 or 2, wherein the outer oil phase contains 15% by mass or less of a semi-solid oil component based on the water-in-oil emulsified solid cosmetic.

8. The water-in-oil emulsified solid cosmetic according to claim 1 or 2, wherein the outer oil phase contains a film-forming agent in an amount of 20% by mass or less based on the water-in-oil emulsified solid cosmetic.

9. The water-in-oil emulsified solid cosmetic according to claim 1 or 2, wherein the water-in-oil emulsified solid cosmetic is a lipstick.

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