WO2017159566A1

WO2017159566A1 - Oil-in-water type composition

Info

Publication number: WO2017159566A1
Application number: PCT/JP2017/009735
Authority: WO
Inventors: 細川欣哉; 依田幸枝; 宮原令二
Original assignee: 株式会社資生堂
Priority date: 2016-03-15
Filing date: 2017-03-10
Publication date: 2017-09-21
Also published as: TW201737898A; JP6851723B2; KR20180117711A; CN108778231B; JP2017165675A; CN108778231A

Abstract

The present invention addresses the problem of providing an oil-in-water type composition which satisfactorily spreads when being applied and which enables, after being applied, a dry and smooth skin touch to be obtained. The oil-in-water type composition is characterized by comprising: an aqueous medium which includes water, and water-soluble and volatile organic solvent; an oil which is dispersed in the aqueous medium; an oil-absorptive hydrophobic powder which can absorb the aqueous medium and the oil, wherein the oil-absorptive hydrophobic powder holds the aqueous medium.

Description

Oil-in-water composition

Related applications

This application claims the priority of Japanese Patent Application No. 2016-051579 filed on Mar. 15, 2016, and is incorporated herein.

The present invention relates to an oil-in-water composition, and particularly to an improvement in an oil-in-water composition using an oil-absorbing hydrophobic powder.

Usually, skin care and makeup work are done with skin care cosmetics such as lotion, and then skin wrinkles (color tone or unevenness) are corrected by foundation, and the desired color tone and imprint as necessary. Give the appearance.
As the foundation, there are a powder foundation, a liquid foundation, and the like. In particular, the liquid foundation is excellent in elongation and the demand is increasing.
However, the liquid foundation uses a liquid oily base regardless of whether it is oily or emulsified. Therefore, the liquid foundation is likely to be sticky after coating, and it is difficult to obtain the smooth skin feel of the powder foundation in this respect.

JP-A-9-48723 JP 2006-63032 A Japanese Patent No. 3291195 JP-A-10-203936 JP 2006-63032 A

The present invention has been made in view of the above prior art, and the problem to be solved is to provide an oil-in-water composition that has good elongation at the time of application and can obtain a smooth skin feel after application. is there.

As a result of studies conducted by the present inventors in order to solve the above-mentioned problems, by blending a specific oil-absorbing hydrophobic powder in an aqueous medium, it is possible to obtain a liquid type, while maintaining good liquid type elongation. The present inventors have found that a good skin feel can be obtained, and have completed the present invention.
That is, the oil-in-water composition according to the present invention is
An aqueous medium comprising water and a water-soluble and volatile organic solvent;
An oil dispersed in the aqueous medium;
An oil-absorbing hydrophobic powder capable of absorbing the aqueous medium and the oil, and
In the composition, the oil-absorbing hydrophobic powder is characterized by holding an aqueous medium.
In the composition, the oil-absorbing hydrophobic powder is preferably mainly composed of cross-linked polymethyl methacrylate.
In the composition, it is preferable that the maximum oil-absorbable amount of the oil-absorbing hydrophobic powder is 90% by mass or more based on the powder.
In the composition, the amount of the oil-absorbing hydrophobic powder is preferably 5 to 25% by mass, and the amount of the oil is preferably 15 to 130% by mass with respect to the maximum oil-absorbable amount of the oil-absorbing hydrophobic powder. It is.

According to the oil-in-water composition according to the present invention, the oil-absorbing hydrophobic powder retains the aqueous medium in the composition, but the aqueous medium evaporates after being applied on the skin, and the skin is smooth. You can get a feel.

It is explanatory drawing of the drying process of the oil-in-water type composition concerning this invention. It is explanatory drawing of the aqueous medium taking-in state by powder.

Hereinafter, embodiments of the present invention will be described in detail.

[Oil-absorbing hydrophobic powder]
As the oil-absorbing hydrophobic powder suitably used in the present invention, cross-linked polymethyl methacrylate, nylon porous powder and the like are preferably used. The material itself may be oleophilic, or the material may be hydrophilic but coated with an oleophilic substance. In the case of coating, it is preferable that the material is oleophilic to the inside of the hole.
The maximum oil-absorbable amount of the oil-absorbing hydrophobic powder is preferably 90% by mass or more with respect to the powder. If the maximum oil-absorbable amount is less than 90% by mass, sufficient oil cannot be absorbed during application, and a good skin feel may not be obtained.
The blending amount of the oil-absorbing hydrophobic powder in the composition is 5 to 25% by mass, preferably 10 to 20% by mass. If the amount is less than 5% by mass, a smooth feeling of use may not be obtained, and if it exceeds 25% by mass, the composition may not be liquid.
In the present invention, it is considered that the oil-absorbing hydrophobic powder takes in an aqueous medium, which will be described later, into the pores in the composition and hardly takes up the coexisting oil. And the oil-absorbing hydrophobic powder which took in the aqueous medium localizes around an oil droplet, and forms the structure approximated to powder emulsification.

[Aqueous medium]
In the present invention, the aqueous medium refers to a liquid mainly composed of water and further added with a volatile organic solvent. Here, preferred examples of the volatile organic solvent include ethyl alcohol, propanol, isopropanol, isobutyl alcohol, t-butyl alcohol and the like.
Further, the blending amount of the volatile organic solvent in the aqueous medium is equal to or higher than the concentration at which the oil-absorbing hydrophobic powder acquires characteristics capable of retaining the aqueous medium, and in the case of the cross-linked polymethyl methacrylate powder, In an aqueous medium, it is 5% by mass or more, preferably 5 to 30% by mass. When the blending amount of the organic solvent in the aqueous medium is less than 5% by mass, the oil-absorbing hydrophobic powder may not be able to hold the aqueous medium, and when it exceeds 30% by mass, it is used as a foundation. May produce an alcoholic odor.

[Oil]
As the oil component suitably used in the present invention, various oil components such as polar oil and silicone oil can be used.
Examples of polar oils include ester oils such as glyceryl tri-2-ethylhexanoate, and glyceryl tri-2-ethylhexanoate is particularly preferred when cross-linked polymethyl methacrylate is used as the oil-absorbing hydrophobic powder.
Examples of nonpolar oils include methylpolysiloxane, methylphenylpolysiloxane, and liquid paraffin.
The oil content is 150% or less, particularly preferably 15% to 130%, of the oil content (maximum oil absorption) that can be absorbed by the oil-absorbing hydrophobic powder. In particular, 15 to 80% is preferable.
If the oil content exceeds 150% of the maximum oil absorption, the oil tends to stick for a long time during application. On the other hand, if it is less than 15%, the elongation during application may be felt poorly.
Oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate, acetic acid Lanolin, isocetyl stearate, isocetyl isostearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, glycerin di-2-heptylundecanoate, tri -2-Ethylhexanoic acid trimethylolpropane, triisostearic acid trimethylolpropane, tetra-2-ethylhexanoic acid pentaerythritol Glyceryl tri-2-ethylhexanoate, glyceryl trioctanoate, glyceryl triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, tri-2- Heptylundecanoic acid glyceride, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-myristate 2- Examples include hexyl decyl, 2-hexyl decyl palmitate, 2-hexyl decyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate and the like.

Examples of the silicone oil include linear polysiloxanes (for example, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxanes (for example, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexyl). Sasiloxane), various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.), acrylic silicones, and the like.
The oil used suitably in the present invention preferably has a viscosity of less than 100 mPa · s as a whole.

[Dispersant]
In the present invention, the dispersant is preferably a carboxylic acid polymer such as carboxyvinyl polymer, sodium polyacrylate, or acrylic acid / alkyl methacrylate copolymer.

[Viscosity of composition]
The viscosity of the oil-in-water composition according to the present invention is preferably 100,000 mPa · s or less. When the viscosity of the oil-in-water composition is 100000 mPa · s or less, a good liquid foundation-like coating feeling can be obtained. In addition, when the viscosity of the oil-in-water composition is 100 mPa · s or less, the oil-absorbing hydrophobic powder is liable to settle. The viscosity of the oil-in-water composition is preferably 100 to 8000 mPa · s, more preferably 2000 to 4000 mPa · s.

[Others]
In addition to the above essential components, the oil-in-water composition of the present invention can be blended with components usually used in oil-in-water compositions for cosmetics and quasi-drugs, and are produced according to conventional methods. Specific components that can be blended are listed below. In addition to the essential components, one or more of the following components may be blended to prepare the oil-in-water composition of the present invention.

Examples of the moisturizing agent include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, sodium lactate, bile salt, Examples thereof include dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO) PO adduct, Izayoi rose extract, yarrow extract, and merirot extract.

Examples of the powder component include inorganic powders (for example, talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, saucite, biotite, permiculite, magnesium carbonate, calcium carbonate, silicic acid. Aluminum, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate (baked gypsum), calcium phosphate, fluorine apatite, hydroxyapatite, ceramic powder , Metal soap (eg, zinc myristate, calcium palmitate, aluminum stearate), boron nitride, etc .; organic powder (eg, polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene Powder, copolymer resin powder of styrene and acrylic acid, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, etc .; inorganic white pigment (eg, zinc oxide); inorganic red pigment (eg, iron titanate) Inorganic purple pigments (eg, mango violet, cobalt violet, etc.); inorganic green pigments (eg, chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (eg, ultramarine blue, bitumen, etc.) Pearl pigments (eg, 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 (eg, aluminum powder, copper powder, etc.) ); Zirconium, barium or aluminum lake, etc. Organic pigments (e.g., red 201, red 202, red 204, red 205, red 220, red 226, red 228, red 405, orange 203, orange 204, yellow 205, Organic pigments such as yellow 401 and blue 404, red 3, red 104, red 106, red 227, red 230, red 401, red 505, orange 205, yellow 4 and yellow No. 5, Yellow 202, Yellow No. 203, Green No. 3, and Blue No. 1); natural pigments (eg, chlorophyll, β-carotene, etc.) and the like.

Examples of liquid oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, southern castor oil, castor oil, linseed oil , Safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagiri oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin and the like.

Examples of the solid fat include cacao butter, palm oil, horse fat, hydrogenated palm oil, palm oil, beef tallow, sheep fat, hydrogenated beef tallow, palm kernel oil, pork fat, beef bone fat, owl kernel oil, hydrogenated oil, cattle Leg fats, moles, hydrogenated castor oil and the like.

Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nuka wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, Examples include reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, and the like.

Examples of the hydrocarbon oil include liquid paraffin, ozokerite, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and the like.
Examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, toluic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid ( DHA) and the like.

Examples of higher alcohols include linear alcohols (eg, lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol); branched chain alcohols (eg, monostearyl glycerin ether (batyl alcohol) ), 2-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyl decanol, isostearyl alcohol, octyldodecanol, and the like.

Moreover, you may mix | blend various surfactant with the oil-in-water type composition concerning this invention.
Anionic surfactants include, for example, fatty acid soaps (eg, sodium laurate, sodium palmitate, etc.); higher alkyl sulfates (eg, sodium lauryl sulfate, potassium lauryl sulfate, etc.); alkyl ether sulfates (eg, POE-lauryl sulfate triethanolamine, POE-sodium lauryl sulfate, etc.); N-acyl sarcosine acid (eg, sodium lauroyl sarcosine, etc.); higher fatty acid amide sulfonate (eg, sodium N-myristoyl-N-methyl taurate, palm Oil fatty acid methyl tauride sodium, lauryl methyl tauride sodium, etc .; phosphate ester salts (POE-oleyl ether sodium phosphate, POE-stearyl ether phosphate, etc.); sulfosuccinate (example) For example, sodium di-2-ethylhexyl sulfosuccinate, sodium monolauroyl monoethanolamide polyoxyethylene sodium sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate, etc .; alkyl benzene sulfonates (eg, sodium linear dodecyl benzene sulfonate, linear dodecyl benzene sulfone) Acid triethanolamine, linear dodecyl benzene sulfonic acid, etc.); higher fatty acid ester sulfates (for example, hydrogenated coconut oil fatty acid sodium glycerin sulfate, etc.); N-acyl glutamate (for example, monosodium N-lauroyl glutamate, N-stearoyl) Disodium glutamate, monosodium N-myristoyl-L-glutamate, etc.); sulfated oil (eg funnel oil); POE POE-alkylallyl ether carboxylates; α-olefin sulfonates; higher fatty acid ester sulfonates; secondary alcohol sulfates; higher fatty acid alkylolamide sulfates; lauroyl monoethanolamide succinic acid Sodium; N-palmitoyl aspartate ditriethanolamine; sodium caseinate and the like.

Examples of the cationic surfactant include alkyltrimethylammonium salts (eg, stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (eg, cetylpyridinium chloride, etc.); distearyldimethylammonium dialkyldimethylammonium chloride; Poly (N, N′-dimethyl-3,5-methylenepiperidinium chloride); alkyl quaternary ammonium salt; alkyldimethylbenzylammonium salt; alkylisoquinolinium salt; dialkyl morpholinium salt; POE-alkylamine; Examples include alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; benzethonium chloride and the like.

Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants (for example, 2-undecyl-N, N, N- (hydroxyethylcarboxymethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide). Side-1-carboxyethyloxy disodium salt, etc.); betaine surfactants (for example, 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkylbetaine, amide betaine) , Sulfobetaine, etc.).

Examples of the lipophilic nonionic surfactant include sorbitan fatty acid esters (for example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, Sorbitan trioleate, penta-2-ethylhexyl diglycerol sorbitan, tetra-2-ethylhexyl diglycerol sorbitan); glycerin polyglycerin fatty acids (eg mono cottonseed oil fatty acid glycerin, monoerucic acid glycerin, sesquioleate glycerin, monostearin) Glycerin acid, α, α′-oleic acid pyroglutamate glycerin, monostearate glycerin malate, etc.); propylene glycol fatty acid esters (for example, Nosutearin propylene glycol, etc.); hydrogenated castor oil derivatives; glycerol alkyl ethers, and the like.

Examples of hydrophilic nonionic surfactants include POE-sorbitan fatty acid esters (for example, POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate). POE sorbite fatty acid esters (eg, POE-sorbite monolaurate, POE-sorbite monooleate, POE-sorbite pentaoleate, POE-sorbite monostearate, etc.); POE-glycerin fatty acid esters (eg, POE- Glycerol monostearate, POE-glycerol monoisostearate, POE-monooleate such as POE-glycerol triisostearate, etc.); POE-fatty acid esters (eg POE-distearate, P POE-alkyl ethers (for example, POE-lauryl ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-2-octyldodecyl ether, POE-core) Stanol ether, etc.); Pluronic type (for example, Pluronic, etc.); POE • POP-alkyl ethers (for example, POE • POP-cetyl ether, POE • POP-2-decyltetradecyl ether, POE • POP-monobutyl ether, POE / POP-hydrogenated lanolin, POE / POP-glycerin ether, etc.); tetra-POE / tetra-POP-ethylenediamine condensates (eg, Tetronic, etc.); POE-castor oil hardened castor oil derivative For example, POE-castor oil, POE-hardened castor oil, POE-hardened castor oil monoisostearate, POE-hardened castor oil triisostearate, POE-hardened castor oil monopyroglutamic acid monoisostearic acid diester, POE-hardened castor Oil maleic acid etc.); POE-beeswax lanolin derivatives (eg POE-sorbite beeswax etc.); alkanolamides (eg palm oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide etc.); POE-propylene glycol fatty acid Examples include esters; POE-alkylamines; POE-fatty acid amides; sucrose fatty acid esters; alkylethoxydimethylamine oxides; trioleyl phosphoric acid and the like.
In the present invention, when a low molecular surfactant is used, the low molecular surfactant is adsorbed on the oil-absorbing hydrophobic powder, which may affect the oil absorption of the powder. It is preferable to set it as mass% or less.

Examples of natural water-soluble polymers include plant-based polymers (for example, gum arabic, gum tragacanth, galactan, locust bean gum, guar gum, tamarind gum, carob gum, caraya gum, carrageenan, pectin, agar, quince seed (malmello), Arge colloid (gypsum extract), starch (rice, corn, potato, wheat), glycyrrhizic acid); microbial polymer (eg, xanthan gum, dextran, succinoglucan, bull run); animal polymer (eg, collagen, casein) , Albumin, gelatin, etc.).

Semi-synthetic water-soluble polymers include, for example, starch polymers (eg, carboxymethyl starch, methylhydroxypropyl starch, etc.); cellulose polymers (methylcellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate) Hydroxypropylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, crystalline cellulose, cellulose powder and the like); alginic acid polymers (for example, sodium alginate, propylene glycol alginate, etc.) and the like.

Synthetic water-soluble polymers include, for example, vinyl polymers (eg, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer); polyoxyethylene polymers (eg, polyethylene glycol 20,000, 40). Acrylic polymer (for example, sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc.); polyethyleneimine; cationic polymer, and the like.

Examples of thickeners other than the water-soluble polymer include, for example, dextrin, sodium pectate, sodium alginate, cellulose dialkyldimethylammonium sulfate, magnesium aluminum silicate, bentonite, hectorite, silicate A1Mg (beegum), laponite, Silicic anhydride etc. are mentioned.

Examples of the ultraviolet absorber include benzoic acid-based ultraviolet absorbers (for example, paraaminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester. N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, N, N-dimethyl PABA ethyl ester, etc.); anthranilic acid ultraviolet absorbers (eg, homomenthyl-N-acetylanthranylate, etc.); Salicylic acid UV absorbers (eg, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate); (For example, octyl cinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, propyl-p-methoxy Cinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxycinnamate, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl -P-methoxycinnamate, ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate, etc.); Benzov Non-based ultraviolet absorbers (for example, 2,4-dihydroxybenzophenone, 2,2′-dihydroxy-4-methoxybenzophenone, 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, 2,2 ′, 4,4 '-Tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2 -Ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.); 3- (4'-methylbenzylidene) -d, l-Camphor, 3-benzylidene- 2-phenyl-5-methylbenzoxazole; 2,2′-hydroxy-5-methylphenylbenzotriazole; 2- (2′-hydroxy-5′-t-octylphenyl) benzotriazole; 2 -(2'-hydroxy-5'-methylphenylbenzotriazole; dibenzalazine; dianisoylmethane; 4-methoxy-4'-t-butyldibenzoylmethane; 5- (3,3-dimethyl-2-norbornylidene) -3 -Pentan-2-one and the like.

Examples of the polyhydric alcohol include divalent alcohols (for example, ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, Pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, octylene glycol, etc.); trivalent alcohol (eg, glycerin, trimethylolpropane, etc.); tetravalent alcohol (eg, 1, 2, 6) Pentaerythritol, such as hexanetriol, etc .; pentavalent alcohol (eg, xylitol, etc.); hexavalent alcohol (eg, sorbitol, mannitol, etc.); polyhydric alcohol polymer (eg, diethylene glycol, dipropylene glycol, Ethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, polyglycerin, etc.); divalent alcohol alkyl ethers (for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol) Monobutyl ether, ethylene glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono 2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol Dibutyl Dihydric alcohol alkyl ethers (for example, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, triethylene glycol) Monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol Dibutyl alcohol ether ester (for example, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol didibate, ethylene glycol disuccinate) , Diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, propylene glycol monophenyl ether acetate, etc.); glycerin monoalkyl ether ( Xyl alcohol, ceralkyl alcohol, batyl alcohol, etc.); sugar alcohols (eg, sorbitol, maltitol, maltotriose, mannitol, erythritol, etc.); glycolide; tetrahydrofurfuryl alcohol; POE-tetrahydrofurfuryl alcohol POP-butyl ether; POP / POE-butyl ether; tripolyoxypropylene glycerin ether; POP-glycerin ether; POP-glycerin ether phosphate; POP / POE-pentaneerythritol ether, polyglycerin and the like.

Examples of monosaccharides include tricarbon sugars (eg, D-glyceryl aldehyde, dihydroxyacetone, etc.); tetracarbon sugars (eg, D-erythrose, D-erythrulose, D-threose, etc.); pentose sugars (eg, L -Arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, L-xylulose, etc .; hexose (eg D-glucose, D-talose, D-bucose) , D-galactose, D-fructose, L-galactose, L-mannose, D-tagatose, etc.); pentose sugar (eg, aldheptose, heproose, etc.); octose sugar (eg, octulose, etc.); deoxy sugar (eg, 2-deoxy-D-ribose, 6-deoxy-L-galactose, 6-deoxy-L-mannose, etc. Amino sugars (eg, D-glucosamine, D-galactosamine, sialic acid, aminouronic acid, muramic acid, etc.); uronic acids (eg, D-glucuronic acid, D-mannuronic acid, L-guluronic acid, D-galacturonic acid, L-iduronic acid and the like).

Examples of the oligosaccharides include sucrose, gnocyanose, umbelliferose, lactose, planteose, isoliquinoses, α, α-trehalose, raffinose, lycnose, umbilicin, stachyose verbus course and the like.
Examples of amino acids include neutral amino acids (eg, threonine, cysteine, etc.); basic amino acids (eg, hydroxylysine, etc.) and the like. Examples of amino acid derivatives include acyl sarcosine sodium (lauroyl sarcosine sodium), acyl glutamate, acyl β-alanine sodium, glutathione, pyrrolidone carboxylic acid and the like.

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

Examples of the alkylene oxide derivative include POE (9) POP (2) dimethyl ether, POE (14) POP (7) dimethyl ether, POE (10) POP (10) dimethyl ether, POE (6) POP (14) dimethyl ether, POE ( 15) POP (5) dimethyl ether, POE (25) POP (25) dimethyl ether, POE (7) POP (12) dimethyl ether, POE (22) POP (40) dimethyl ether, POE (35) POP (40) dimethyl ether, POE ( 50) POP (40) dimethyl ether, POE (55) POP (30) dimethyl ether, POE (30) POP (34) dimethyl ether, POE (25) POP (30) dimethyl ether, POE (27) POP (14) dimethyl Ether, POE (55) POP (28) dimethyl ether, POE (36) POP (41) dimethyl ether, POE (7) POP (12) dimethyl ether, POE (17) POP (4) dimethyl ether.

Examples of the sequestering agent include 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, disodium edetate, trisodium edetate, and tetrasodium edetate. Sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, trisodium ethylenediaminehydroxyethyl triacetate and the like.

Examples of the antioxidant assistant include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, kephalin, hexametaphosphate, phytic acid, ethylenediaminetetraacetic acid and the like.

Other ingredients that can be added include, for example, preservatives (ethyl paraben, butyl paraben, etc.); whitening agents (eg, placenta extract, yukinoshita extract, arbutin, etc.); blood circulation promoters (nicotinic acid, benzyl nicotinate, nicotine) Acid tocopherol, nicotinic acid β-butoxy ester, minoxidil or its analog, vitamin Es, γ-oryzanol, alkoxycarbonylpyridine N-oxide, carpronium chloride, acetylcholine or a derivative thereof, and the like (for example, ginger, (Ubakaku, Auren, Shikon, Birch, Loquat, Carrot, Aloe, Zeniaoi, Iris, Grape, Loofah, Lily, Saffron, Senkyu, Pepper, Hypericum, Onionis, Garlic, Pepper, Chimpi, Toki, Button, Seaweed, etc.), Activation Agent (for example For example, panthenyl ethyl ether, nicotinamide, biotin, pantothenic acid, royal jelly, cholesterol derivatives, etc.); antiseborrheic agents (eg, pyridoxines, thianthol, etc.).

The dosage form of the oil-in-water composition of the present invention is arbitrary, and any dosage form such as a solution system, an emulsion system, a lotion, a gel, a mist, a spray, a mousse, etc. may be used. It is preferable to use it.

Hereinafter, preferred embodiments of the present invention will be described in detail.

First, the test method will be described.
(Distributed state)
The dispersion state of the produced sample was confirmed with a microscope. A state where there was no aggregate in the field of view when viewed at 100 times was A, 10 or less were B, 50 or less were C, and more were D, and A and B were judged to be well dispersed.
(viscosity)
Each sample was measured at BL type viscometer (manufactured by Shibaura System Co., Ltd.), rotor No. 3, 12 rpm, 60 seconds, 30 ° C.

(Oil absorption)
(1) Take 2 g of a sample on a glass plate and add glyceryl tri-2-ethylhexanoate from a puree little by little to the center of the sample, and knead the whole thoroughly with a spatula each time.
(2) Repeat this procedure, and the end point is the amount of glyceryl tri-2-ethylhexanoate that exudes from the sample and does not enter further.
(3) Obtain the amount of glyceryl tri-2-ethylhexanoate required for this, and calculate the oil absorption from the following equation.
Oil absorption = [(glyceryl tri-2-ethylhexanoate) / (powder sample)] × 100
(Usage feeling during application: smooth feeling)
(1) Apply 0.4 g of sample to the inner side of the upper arm and perform a round trip of 2 cm x 4 cm per second.
(2) Measure the time when it feels that the degree of smoothness does not change any more (feel change time)
(3) Evaluation criteria A Very smooth B Smooth S D Smooth D A study was conducted to give a powdery foundation-like smooth feel.

Table 1

As shown in Table 1, when the resin powder was not blended (Test Example 1-1), a smooth feel was not obtained, and formulation was difficult unless a so-called surfactant was used. It was. Further, when the crosslinked polymethyl methacrylate porous powder was used, unless the ethyl alcohol was blended, the dispersibility of the powder was poor and it was difficult to prepare a formulation (Test Example 1-2).
In contrast, when a cross-linked polymethylmethacrylate porous powder is added to a dispersion medium in which ion-exchanged water and ethyl alcohol are mixed, a good powder dispersion is formed, and the powder hardly floats. This indicates that the porous powder has taken up the aqueous medium, and that the oil is not sticky by applying it on the skin for about 10 seconds while maintaining good elongation derived from the oil. It was found that it disappeared and a smooth feeling was obtained (Test Example 1-3). In this regard, the inventors observed the drying process of the composition. The results are shown in FIG. That is, 0.01 g of this product was placed on a slide glass, spread and dispersed with a toothpick, and the drying process was observed 40 times with a microscope without placing a cover glass. The left photo is immediately after, the middle photo is 30 seconds after application, and the right photo is 1 minute later. As shown in FIG. 1, it was confirmed that in the composition (or immediately after application), the solvent present so as to be surrounded by the crosslinked polymethacrylate porous powder disappeared with drying.

Furthermore, the present inventors examined the oil absorption function on the skin characteristic of the present invention. That is, 1. Prepare a mixture of 80% water, 10% ethanol, 10% crosslinked polymethylmethacrylate porous powder, and 2. Mixture of 90% water, 10% crosslinked polymethylmethacrylate porous powder, Each sample was stirred with a disper at a speed of 2000 rpm for 1 minute to prepare a sample. FIG. 2 is a photograph of the sample immediately after preparation and after standing for 1 day.
Immediately after agitation and adjustment, both samples are pure white and both appear to be unchanged, but when left standing for one day, the upper part of 1. is transparent and the crosslinked polymethylmethacrylate porous powder almost settles. ing. This suggests that the water-soluble component composed of water / EtOH is taken into the pores of the crosslinked polymethylmethacrylate porous powder and is precipitated due to the increased specific gravity.
On the other hand, when only the water of 2 is used, a part of the porous powder settles, but many float on the water surface.

From these, cross-linked polymethyl methacrylate is a hydrophobic powder, and when the dispersion medium is composed only of water, the amount of absorption of the dispersion medium (water) is considered to be very small, while organic solvents are mixed. It is understood that the cross-linked polymethyl methacrylate absorbs the dispersion medium (aqueous medium) in the aqueous medium.

Next, the present inventors examined a powder dispersion medium (aqueous medium). The results are shown in Table 2.
Table 2

As shown in Table 2 above, both ethyl alcohol and isopropyl alcohol show almost the same tendency, and the blending amount of the volatile organic solvent in the aqueous medium is 5% by mass or more, so that formulation suitability and good usability are obtained. I was able to. If it is less than 5% by mass, the dispersibility and absorbability for the oil-absorbing hydrophobic powder may not be sufficiently secured. Furthermore, the time required to change from a feeling of good oil at the beginning of application to a smooth feel (feel change time) was also in a favorable range of about 7 to 10 seconds. In addition, according to the study by the present inventors, if the touch change time is less than 5 seconds, there may be some difficulty in coating properties, while if it exceeds 20 seconds, it is often not determined that the coating feeling is smooth. It has become clear.
In order to obtain the effects of the present invention, there is no particular upper limit on the amount of the organic solvent, but considering use in a foundation or the like, the amount of the organic solvent in the aqueous medium is preferably up to about 30% by mass.

The present inventors have also studied various oil-absorbing powders. The results are shown in Table 3.
Table 3

From the results shown in Table 3, even when the hydrophobic powder is used, if the amount of oil absorption is less than 90% by mass with respect to the powder, sufficient usability cannot be improved (Test Example 3-1), and a certain level of oil absorption is achieved. However, good suitability for formulation cannot be obtained with hydrophilic silica (Test Example 3-2).
On the other hand, the hydrophobic powder having an oil absorption of 90% by mass or more was able to obtain an effect of improving the feeling of use regardless of whether it was porous (Test Examples 3-3 to 3-7).

In addition, the present inventors have examined the blending amount of the oil-absorbing hydrophobic powder. The results are shown in Table 4.
Table 4

From Table 4, it is understood that the blending amount of the oil-absorbing hydrophobic powder in the composition is 5 to 25% by mass, particularly preferably 10 to 20% by mass.

Moreover, the present inventors examined the oil content. The results are shown in Table 5.
Table 5

As is apparent from Table 5, the effects of the present invention can be exhibited regardless of the oil type, but an ester oil having a relatively low viscosity (less than 100 mPa · s) is preferred, and silicone oil and hydrocarbon oil are preferred. The composition viscosity increased and became souffled.

In addition, the present inventors have studied focusing on the relationship between the oil-absorbable amount and the oil content of the oil-absorbing hydrophobic powder. The results are shown in Table 6.
Table 6

From Table 6, a very good feeling of use can be obtained when the oil content is 80% or less of the oil-absorbable amount, but the effect of improving the feeling of use can be exhibited up to about 130%. However, if it exceeds 150%, the feeling change time becomes long, and it becomes difficult to realize a smooth feeling of use.

In addition, the present inventors have examined improvement of powder sedimentation in the preparation. That is, the powder may settle in the formulation and the powder may not be redispersed in the solvent. Therefore, when the improvement of sedimentation was examined, as shown in Table 7, the effect of improving sedimentation was observed in xanthan gum, and the amount of xanthan gum blended was about 0.03 to 0.5% by mass considering the increase in viscosity. preferable.
For the samples stored at 50 ° C. for 4 weeks, the sample was evaluated as “◯” when almost no sedimentation of the powder was observed in the solvent, and “x” when sedimentation was observed.

Table 7

Claims

An aqueous medium comprising water and a water-soluble and volatile organic solvent;
An oil dispersed in the aqueous medium;
An oil-absorbing hydrophobic powder capable of absorbing the aqueous medium and the oil, and
An oil-in-water composition, wherein the oil-absorbing hydrophobic powder retains an aqueous medium.
2. The oil-in-water composition according to claim 1, wherein the oil-absorbing hydrophobic powder is porous.
3. The composition according to claim 1 or 2, wherein the oil-absorbing hydrophobic powder is an oil-in-water composition comprising a cross-linked polymethyl methacrylate as a main material.
4. The oil-in-water composition according to claim 1, wherein the maximum oil-absorbable amount of the oil-absorbing hydrophobic powder is 90% by mass or more based on the powder.
5. The composition according to claim 1, wherein the blending amount of the oil-absorbing hydrophobic powder is 5 to 25% by mass, and the blending amount of the oil is 15 to 130% by mass with respect to the maximum oil-absorbable amount of the oil-absorbing hydrophobic powder. An oil-in-water composition, characterized in that
6. The oil-in-water composition according to any one of claims 1 to 5, wherein xanthan gum is blended.