Oil-in-water emulsion composition

Abstract

The present invention is an oil-in-water emulsion composition containing (a) a cationized polysaccharide and (b) a nonionic surfactant, the oil-in-water emulsion composition having (a) the cationized polysaccharide in a continuous phase and having a total HLB of the surfactant blended of 12 or less.

Description

Oil-in-water emulsion composition

[0001] The present invention relates to an oil-in-water emulsion composition.

[0002] Oil-in-water emulsion cosmetics are primarily used in emulsions, creams, and the like because they provide a fresh, moisturizing feel. However, oil-in-water emulsion cosmetics have the drawback of poor water resistance and being easily washed away by sweat, resulting in poor makeup wear. To impart water resistance to oil-in-water emulsion cosmetics, a film-forming agent such as trimethylsiloxysilicate may be added. Furthermore, formulations using cationic polymer emulsifiers in which fatty acid groups such as acyl groups have been partially introduced into cationic polymers have been reported (see Patent Document 1). Furthermore, it has also been proposed to impart water resistance using an ion complex formed between an anionic polymer and a cationic compound (see Patent Documents 2 and 3). Furthermore, a technology has also been proposed in which water resistance is imparted by forming a film using a cationic polysaccharide and a crosslinker having at least three acid groups (see Patent Document 4).

[0003] Japanese Patent Publication No. 2004-307434 International Publication No. 2020 / 090874 International Publication No. 2011 / 016363 Japanese Patent Publication No. 2021-04219

[0004] However, when water resistance is adjusted to a sufficient level using a film-forming agent, there are problems such as not being able to achieve a good spreadability or a fresh feel in use, or not being able to easily wash off with soap. Furthermore, when a cationic polymer emulsifier is used, there is a problem that it is not a general-purpose raw material and is difficult to obtain, and formulations are limited. Furthermore, when an ion complex is used, there is a problem that formulations are limited and it is difficult to stably incorporate powder components. As an oil-in-water emulsion cosmetic, a formulation that satisfies all of the requirements of good spreadability in use, water resistance, and ease of washout has not yet been proposed. Therefore, the present invention has been made in consideration of the above problems, and an object of the present invention is to provide an oil-in-water emulsion composition that is good spreadability in use, excellent water resistance, and ease of washout.

[0005] As a result of extensive research, the present inventors have found that the above-mentioned problems can be solved by dispersing a cationized polysaccharide in an aqueous phase and further adding a nonionic surfactant, thereby completing the present invention.

[0006] That is, the present invention provides an oil-in-water emulsion composition that contains (a) a cationized polysaccharide in a continuous phase and (b) a nonionic surfactant, and the total HLB of the surfactants blended is 12 or less.

[0007] (a) The cationized polysaccharide is preferably at least one selected from cationized cellulose, cationized fenugreek gum, cationized guar gum, cationized tara gum, cationized locust bean gum, and cationized xanthan gum.

[0008] The total HLB of the surfactants to be blended is preferably 6 or more.

[0009] The blending amount of (a) the cationized polysaccharide is preferably 0.1% by mass or more and 2.0% by mass or less based on the total amount of the oil-in-water emulsion composition.

[0010] It is preferable that the oil component (c) is contained, and the blend amount of the oil component (c) is 10 mass % or more based on the total amount of the oil-in-water emulsion composition.

[0011] The blending amount of (b) the nonionic surfactant is preferably 0.05% by mass or more and 10.0% by mass or less based on the total amount of the oil-in-water emulsion composition.

[0012] The oil-in-water emulsion composition of the present invention may contain a hydrophobic powder.

[0013] The hydrophobic powder is preferably at least one selected from hydrophobically treated titanium oxide, hydrophobically treated zinc oxide, hydrophobically treated cerium oxide, and hydrophobically treated pigment.

[0014] According to the present invention, it is possible to provide an oil-in-water emulsion cosmetic that has a good spreadability and feel when used, and is excellent in water resistance and ease of washing.

[0015] Hereinafter, embodiments of the present invention will be described in detail.

[0016] [Oil-in-water emulsion composition] The present invention provides an oil-in-water emulsion composition that contains (a) a cationized polysaccharide in a continuous phase and (b) a nonionic surfactant, and in which the combined HLB (hydrophilic-lipophilic balance) of the surfactants is 12 or less.

[0017] (a) Cationic Polysaccharides The (a) cationic polysaccharide is preferably at least one selected from cationic cellulose, cationized fenugreek gum, cationized guar gum, cationized tara gum, cationized locust bean gum, and cationized xanthan gum. Examples of cationic cellulose include polyquaternium-10 and polyquaternium-67. Examples of cationic fenugreek gum include fenugreek hydroxypropyltrimonium chloride, examples of cationic guar gum include guar hydroxypropyltrimonium chloride, examples of cationic tara gum include Caesalpinia spinosa hydroxypropyltrimonium chloride, examples of cationic locust bean gum include locust bean hydroxypropyltrimonium chloride, and examples of cationic xanthan gum include xanthan hydroxypropyltrimonium chloride. The incorporation of (a) cationic polysaccharides can maintain the formulation in a good state free from separation and aggregation, thereby exhibiting water resistance. However, if the amount of the cationized polysaccharide is too large, the fresh and smooth feel when used will be impaired. Therefore, the amount of the (a) cationized polysaccharide is preferably 0.10% by mass or more and 2.00% by mass or less, more preferably 0.15% by mass or more and 1.50% by mass or less, and even more preferably 0.20% by mass or more and 1.0% by mass or less, based on the total amount of the oil-in-water emulsion composition.

[0018] The oil-in-water emulsion composition of the present invention has (a) a cationic polysaccharide in the continuous phase (aqueous phase), thereby adhering to the skin surface, keeping the ingredients in the formulation on the skin and preventing them from being washed away by sweat or water. Furthermore, during cleansing, the composition can be easily washed off with an anionic surfactant typically contained in a cleanser. Therefore, the oil-in-water emulsion composition of the present invention can be easily cleaned while having strong water-resistance against water and sweat.

[0019] (b) Nonionic Surfactant The (b) nonionic surfactant is appropriately selected from lipophilic or hydrophilic surfactants and blended into the oil-in-water emulsion composition of the present invention so that the total HLB of the surfactants blended therein is not more than 12. Examples of the (b) nonionic surfactant include polyglycerin fatty acid esters, propylene glycol fatty acid esters, pentaerythritol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbit fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyethylene glycol fatty acid esters, polyoxyethylene alkyl ethers, polyoxyethylene phytosterols, polyoxyethylene phytostanols, polyoxyethylene polyoxypropylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, polyoxyethylene beeswax derivatives, polyoxyethylene alkylamines, polyoxyethylene fatty acid amides, polyoxyethylene alkylphenyl formaldehyde condensates, single-chain polyoxyethylene alkyl ethers, and polyether-modified silicones. (b) The nonionic surfactant may be one of the above or a combination of two or more thereof.

[0020] The amount of (b) nonionic surfactant to be blended depends on the amount of the components to be emulsified and dispersed, but is preferably from 0.1 to 10.0% by mass, more preferably from 0.3 to 8.0% by mass, and even more preferably from 0.5 to 6.0% by mass, relative to the total amount of the oil-in-water emulsion composition, so that the nonionic surfactant can substantially function and the fresh, spreadable feel of the formulation is not impaired.

[0021] (c) Oily Component The oil-in-water emulsion composition of the present invention contains an oily component (c). The oily component (c) constitutes the internal phase (oil phase) of the oil-in-water emulsion cosmetic. Examples of the oily component (c) include ester oils, hydrocarbon oils, silicone oils, higher fatty acids, higher alcohols, alkyl glyceryl ethers, liquid oils, solid oils, semi-solid oils, fluorinated oils, UV absorbers, and hydrophobic powders.

[0022] Examples of ester oils include octyl octanoate, nonyl nonanoate, cetyl octanoate, isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, ethylhexyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, and 12-hydroxystearin. Cholesteryl di-2-ethylhexanoate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, tripropylene glycol pivalate, diisostearyl malate, glycerin di-2-heptylundecanoate, glycerin diisostearate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaethylhexanoate Taerythrityl, glyceryl tri-2-ethylhexanoate (triethylhexanoin), glyceryl trioctanoate, glyceryl triisopalmitate, cetyl 2-ethylhexanoate-2-ethylhexyl palmitate, glyceryl trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glucan Examples of the fatty acid ester include 2-octyldodecyl stamate, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, cetyl ethylhexanoate, and macadamia nut fatty acid phytosteryl, and preferably pentaerythrityl tetraethylhexanoate.

[0023] Examples of hydrocarbon oils include isododecane, isohexadecane, isoparaffin, mineral oil (liquid paraffin), ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and hydrogenated polydecene.

[0024] Examples of silicone oils include linear polysiloxanes (e.g., dimethicone, diphenylsiloxyphenyltrimethicone, diphenylpolysiloxane, etc.), cyclic polysiloxanes (e.g., octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.), silicone resins that form a three-dimensional network structure, silicone rubber, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.), and acrylic silicones, with linear polysiloxanes being preferred.

[0025] Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tall acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA).

[0026] Examples of higher alcohols include straight-chain alcohols (e.g., lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, etc.), branched-chain alcohols (e.g., lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol, etc.), and the like.

[0027] Examples of alkyl glyceryl ethers include batyl alcohol and chimyl alcohol.

[0028] Examples of liquid oils include avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil, rapeseed oil, sesame oil, persic oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, germ oil, and triglycerin. Examples of solid oils include cocoa butter, coconut oil, hardened coconut oil, palm oil, palm kernel oil, hydrogenated palm oil, Japan wax kernel oil, hardened oil, and Japan wax. Examples of semi-solid oils include shea butter, partially hydrogenated coconut oil, and partially hydrogenated jojoba oil. (c) One or more types of oily components can be blended.

[0029] Examples of the fluorine-based oil include fluorine-modified dimethylpolysiloxane, fluorine-modified methylphenylpolysiloxane, perfluoropolyether, and perfluorocarbon.

[0030] Examples of the ultraviolet absorber include benzoic acid-based ultraviolet absorbers (e.g., para-aminobenzoic 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, etc.); anthranilic acid-based ultraviolet absorbers (e.g., homomenthyl-N-acetylanthranilate, etc.); salicylic acid-based ultraviolet absorbers (e.g., amyl salicylate, menthyl salicylate, etc.); salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc.); cinnamic acid-based ultraviolet absorbers (e.g., octyl cinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, propyl-p-methoxycinnamate, 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.); pyridazine derivatives (dimorpholinopyridazine); 3-(4'-methylbenzylidene)-d,l- Examples include camphor, 3-benzylidene-d,l-camphor; 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.

[0031] The hydrophobic powder is not particularly limited as long as the surface of the powder is hydrophobic, and may be a powder that is hydrophobic in itself or an inorganic powder that has been subjected to a hydrophobic treatment.

[0032] Examples of hydrophobic powders include organic powders such as polyethylene powder, polymethyl methacrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, and cellulose powder; silicone powders such as trimethylsilsesquioxane powder; and polyamide resin powder (nylon powder).

[0033] Examples of inorganic powders to be hydrophobically treated include inorganic powders such as talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, lepidolite, biotite, lithia mica, vermiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, metal soap (zinc myristate, calcium palmitate, aluminum stearate, etc.), boron nitride, etc.; inorganic white pigments such as titanium dioxide and zinc oxide; iron oxide (red iron oxide), Examples of inorganic red pigments include iron titanate; inorganic brown pigments such as γ-iron oxide; inorganic yellow pigments such as yellow iron oxide and ochre; inorganic black pigments such as black iron oxide, carbon black, and low-grade titanium dioxide; inorganic purple pigments such as mango violet and baltic violet; inorganic green pigments such as chromium oxide, chromium hydroxide, and cobalt titanate; inorganic blue pigments such as ultramarine and iron blue; pearl pigments such as titanium dioxide-coated mica, titanium dioxide-coated bismuth oxychloride, titanium dioxide-coated talc, colored titanium dioxide-coated mica, bismuth oxychloride, and fish scale leaf; metal powder pigments such as aluminum powder and copper powder; and fine metal oxide particles such as fine particle titanium dioxide, fine particle zinc oxide, fine particle iron oxide, and fine particle cerium oxide. Here, pigment-grade particles refer to particles having an average particle size of approximately 200 nm or more, and fine particles refer to particles having an average particle size of approximately less than 200 nm, generally 100 nm or less.

[0034] The method for hydrophobizing inorganic powders may be any method that can impart water repellency, and the method is not particularly limited, but can be, for example, a conventional surface treatment method such as a gas phase method, a liquid phase method, an autoclave method, a mechanochemical method, etc. The hydrophobizing agent is not particularly limited, but examples thereof include fatty acid dextrin-treated powder, trimethylsiloxysilicate-treated powder, fluorine-modified trimethylsiloxysilicate-treated powder, methylphenylsiloxysilicate-treated powder, fluorine-modified methylphenylsiloxysilicate-treated powder, low-viscosity to high-viscosity oily polysiloxane-treated powder such as dimethylpolysiloxane, diphenylpolysiloxane, and methylphenylpolysiloxane, gum-like polysiloxane-treated powder, methylhydrogenpolysiloxane-treated powder, fluorine-modified methylhydrogenpolysiloxane-treated powder, methyltrichlorosilane, methyltrialkoxysilane, hexamethyldisilane, Examples of the powder include powders treated with organic silyl compounds such as dimethyldichlorosilane, dimethyldialkoxysilane, trimethylchlorosilane, trimethylalkoxysilane, or fluorine-substituted derivatives thereof; powders treated with organic modified silanes such as ethyltrichlorosilane, ethyltrialkoxysilane, propyltrichlorosilane, propyltrialkoxysilane, hexyltrichlorosilane, hexyltrialkoxysilane, long-chain alkyltrichlorosilane, long-chain alkyltriethoxysilane, or fluorine-substituted derivatives thereof; powders treated with amino-modified polysiloxanes; powders treated with fluorine-modified polysiloxanes; and powders treated with alkyl fluoride phosphates.

[0035] In order to fully exert the functions of the formulation, the blending amount of (c) the oily component is preferably 3% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more, based on the total amount of the oil-in-water emulsion composition, and in order to obtain good spreadability and a fresh feeling when used, the blending amount is preferably 80% by mass or less, more preferably 70% by mass or less, and even more preferably 60% by mass or less.

[0036] The oil-in-water emulsion composition of the present invention contains (a) a cationic polysaccharide in the aqueous phase and further contains (b) a nonionic surfactant, thereby enabling stable incorporation of a high amount of hydrophobic powder. To enhance the functionality of the formulation, the hydrophobic powder can be stably incorporated at a high amount of 1% by mass or more, more preferably 3% by mass or more, even more preferably 5% by mass or more, and even more preferably 10% by mass or more, based on the total amount of the oil-in-water emulsion composition. From the viewpoint of emulsion stability as a formulation, the upper limit of the amount is preferably 60% by mass or less, more preferably 55% by mass or less, and even more preferably 50% by mass or less.

[0037] (d) Water-soluble solvent The oil-in-water emulsion composition of the present invention contains (d) a water-soluble solvent. (d) The water-soluble solvent dissolves (d) the cationized polysaccharide to form a continuous phase. Examples of the water-soluble solvent include water and water-soluble alcohol. The water that can be used in the oil-in-water emulsion composition of the present invention is not particularly limited, but water used in cosmetics, quasi-drugs, etc. can be used, for example, purified water, ion-exchanged water, tap water, etc.

[0038] Examples of water-soluble alcohols include lower alcohols, higher alcohols, polyhydric alcohols, polyhydric alcohol polymers, dihydric alcohol alkyl ethers, dihydric alcohol alkyl ethers, dihydric alcohol ether esters, glycerin monoalkyl ethers, sugar alcohols, monosaccharides, oligosaccharides, polysaccharides, and derivatives thereof, which can be used alone or in combination.

[0039] Examples of the lower alcohol include ethanol, propanol, isopropanol, isobutyl alcohol, and t-butyl alcohol.

[0040] The higher alcohol is preferably a higher alcohol having 6 or more carbon atoms, and examples thereof include saturated linear monohydric alcohols and unsaturated monohydric alcohols.

[0041] Examples of saturated linear monohydric alcohols include dodecanol (lauryl alcohol), tridodecanol, tetradodecanol (myristyl alcohol), pentadecanol, hexadecanol (cetyl alcohol), heptadecanol, octadecanol (stearyl alcohol), nonadecanol, icosanol (arachyl alcohol), heneicosanol, docosanol (behenyl alcohol), tricosanol, tetracosanol (carnaubyl alcohol), pentacosanol, and hexacosanol (ceryl alcohol).

[0042] Examples of unsaturated monohydric alcohols include elaidyl alcohol. In the present invention, saturated linear monohydric alcohols are preferred from the viewpoint of stability over time. As the higher alcohol, one or a combination of two or more of the above can be used. In the present invention, it is preferable to use a monohydric aliphatic alcohol having 16 to 22 carbon atoms.

[0043] Examples of polyhydric alcohols include dihydric alcohols (e.g., 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.); trihydric alcohols (e.g., glycerin, trimethylolpropane, etc.); tetrahydric alcohols (e.g., pentaerythritol such as 1,2,6-hexanetriol, etc.); pentahydric alcohols (e.g., xylitol, etc.); and hexahydric alcohols (e.g., sorbitol, mannitol, etc.).

[0044] Examples of polyhydric alcohol polymers include diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, and polyglycerin.

[0045] Examples of dihydric alcohol alkyl ethers include 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, and ethylene glycol dibutyl ether.

[0046] Examples of dihydric alcohol alkyl ethers include 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, and dipropylene glycol butyl ether.

[0047] Examples of dihydric alcohol ether esters include ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diadipate, 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, and propylene glycol monophenyl ether acetate.

[0048] Examples of glycerin monoalkyl ethers include xyl alcohol, selachyl alcohol, and batyl alcohol.

[0049] Examples of sugar alcohols include sorbitol, maltitol, maltotriose, mannitol, erythritol, glucose, fructose, starch decomposition sugars, maltose, xylitose, starch decomposition sugar reducing alcohols, and the like.

[0050] Examples of monosaccharides include trioses (e.g., D-glyceryl aldehyde, dihydroxyacetone, etc.), tetraoses (e.g., D-erythrose, D-erythrulose, D-threose, erythritol, etc.), pentoses (e.g., L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, L-xylulose, etc.), hexoses (e.g., D-glucose, D-talose, D-buccose, D-galactose, D-fructose, L-galactose, L- Examples of sugars include D-mannose, D-tagatose, etc.), heptoses (e.g., aldoheptose, heprose, etc.), octose (e.g., octulose, etc.), deoxysugars (e.g., 2-deoxy-D-ribose, 6-deoxy-L-galactose, 6-deoxy-L-mannose, etc.), aminosugars (e.g., D-glucosamine, D-galactosamine, sialic acid, aminouronic acid, muramic acid, etc.), and uronic acids (e.g., D-glucuronic acid, D-mannuronic acid, L-guluronic acid, D-galacturonic acid, L-iduronic acid, etc.).

[0051] Examples of oligosaccharides include sucrose, gunthianose, umbelliferose, lactose, planteose, isolychnoses, α,α-trehalose, raffinose, lychnoses, umbilicin, stachyose, verbascoses, and the like.

[0052] Examples of polysaccharides include cellulose, quince seed, chondroitin sulfate, starch, galactan, dermatan sulfate, glycogen, gum arabic, heparan sulfate, hyaluronic acid, tragacanth gum, keratan sulfate, chondroitin, xanthan gum, mucoitin sulfate, guar gum, dextran, keratosulfate, locust bean gum, succinoglucan, and caronic acid.

[0053] Other examples that can be used include glysolid, 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. Also usable are polyols such as polyoxyethylene methyl glucoside (Glucam E-10) and polyoxypropylene methyl glucoside (Glucam P-10). Here, POP refers to a polyoxypropylene group.

[0054] The content of the water-soluble solvent (d) in the oil-in-water emulsion composition is preferably 20% by mass or more, and more preferably 25% by mass or more, based on the total amount of the oil-in-water emulsion composition, from the viewpoint of emulsion stability, etc. In the present invention, the stability of the formulation can be maintained without blending a higher alcohol, but when a higher alcohol is blended, from the viewpoint of obtaining a fresh feeling when used, the content is preferably 2.0% by mass or less, more preferably 1.5% by mass or less, and even more preferably 1.0% by mass or less, based on the total amount of the oil-in-water emulsion composition.

[0055] <Other Components> The oil-in-water emulsion composition of the present invention may contain other components such as inorganic powders, anionic surfactants, amphoteric surfactants, humectants, water-soluble polymers, sequestering agents, amino acids, organic amines, pH adjusters, antioxidants, and antioxidant aids.

[0056] (Anionic surfactant) In the present invention, the stability of the formulation can be maintained without adding an anionic surfactant, but an anionic surfactant may be added within a range that does not impair the mechanism and effect of the present invention. However, in order to maintain water resistance, the amount of the anionic surfactant added is preferably 5% by mass or less, more preferably 4.0% by mass or less, even more preferably 4% by mass or less, even more preferably 3.0% by mass or less, particularly preferably 2.0% by mass or less, and most preferably 1.0% by mass or less, based on the total amount of the oil-in-water emulsion composition.

[0057] Examples of such anionic surfactants include fatty acid soaps (e.g., sodium laurate, sodium palmitate, etc.); higher alkyl sulfates (e.g., sodium lauryl sulfate, potassium lauryl sulfate, etc.); alkyl ether sulfates (e.g., POE-lauryl ether triethanolamine sulfate, POE-lauryl ether sodium sulfate, sodium laureth sulfate, etc.); N-acyl sarcosinates (e.g., sodium lauroyl sarcosinate, etc.); higher fatty acid amide sulfonates (e.g., sodium N-stearoyl-N-methyl taurate, sodium N-myristoyl-N-methyl taurate, sodium cocoyl methyl taurate, sodium lauryl methyl taurate, etc.); phosphate salts (sodium POE-oleyl ether phosphate, POE-stearyl ether phosphate, etc.); sulfosuccinates (e.g., sodium di-2-ethylhexyl sulfosuccinate, sodium monolauroyl monoethanolamide polyoxyethylene sulfosuccinate, lauryl polypropylene glycol sodium sulfosuccinate, etc.); alkylbenzenesulfonates (for example, sodium linear dodecylbenzenesulfonate, triethanolamine linear dodecylbenzenesulfonate, linear dodecylbenzenesulfonic acid, etc.); higher fatty acid ester sulfate salts (for example, sodium hydrogenated coconut oil fatty acid glycerin sulfate, etc.); N-acylglutamates (for example, monosodium N-lauroylglutamate, disodium N-stearoylglutamate, monosodium N-myristoyl-L-glutamate, etc.); sulfated oils (for example, turmeric oil, etc.); POE-alkyl ether carboxylic acids; POE-alkyl allyl ether carboxylate salts; α-olefin sulfonates; higher fatty acid ester sulfonates; secondary alcohol sulfate salts; higher fatty acid alkylolamide sulfate salts; sodium lauroylmonoethanolamide succinate; ditriethanolamine N-palmitoyl aspartate; and sodium caseinate.

[0058] (Amphoteric Surfactants) Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants (e.g., 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.); betaine-based surfactants (e.g., 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkyl betaine, amido betaine, sulfobetaine, etc.).

[0059] (Moisturizing Agent) Examples of moisturizing agents include xylitol, sorbitol, maltitol, trehalose, erythritol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, fish collagen, phytosteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, diglycerin (EO)PO adduct, Rosa robur extract, yarrow extract, melilot extract, and the like.

[0060] (Water-soluble polymers) Examples of natural water-soluble polymers include plant-derived polymers (e.g., gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed, algae colloid (cassow extract), starch (rice, corn, potato, wheat); and microbial-derived polymers (e.g., xanthan gum, dextran, succinoglucan, pullulan, etc.).

[0061] Examples of semi-synthetic water-soluble polymers include starch-based polymers (e.g., carboxymethyl starch, methylhydroxypropyl starch, etc.); cellulose-based polymers (methyl cellulose, ethyl cellulose, methylhydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, carboxymethyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, etc.); and alginic acid-based polymers (e.g., sodium alginate, propylene glycol alginate, etc.).

[0062] Examples of synthetic water-soluble polymers include vinyl polymers (e.g., polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, etc.); polyoxyethylene polymers (e.g., polyoxyethylene-polyoxypropylene copolymers of polyethylene glycol 20,000, 40,000, 60,000, 1,000,000, etc.); acrylic polymers (e.g., sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc.); and cationic polymers.

[0063] (Sequestering Agent) Examples of sequestering agents include 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, disodium edetate, trisodium edetate, tetrasodium edetate, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, and trisodium ethylenediaminehydroxyethyltriacetate.

[0064] (Amino Acids) Examples of amino acids include neutral amino acids (e.g., threonine, cysteine, etc.); basic amino acids (e.g., hydroxylysine, arginine, etc.); and amino acid derivatives include sodium acyl sarcosine (sodium lauroyl sarcosine), acyl glutamate, acyltaurate, sodium acyl β-alanine, glutathione, pyrrolidone carboxylic acid, trimethylglycine, etc.

[0065] (Organic Amine) Examples of organic amines include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.

[0066] (pH Adjusting Agent) Examples of the pH adjusting agent include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.

[0067] (Antioxidant) Examples of the antioxidant include δ-tocopherol, dibutylhydroxytoluene, butylhydroxyanisole, and gallic acid esters.

[0068] (Antioxidant Auxiliary Agent) Examples of antioxidant auxiliary agents include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, cephalin, hexametaphosphate, phytic acid, and ethylenediaminetetraacetic acid.

[0069] Examples of other ingredients besides those mentioned above include preservatives (e.g., ethylparaben, butylparaben, phenoxyethanol, etc.); water-soluble whitening agents (e.g., arbutin, tranexamic acid, potassium 4-methoxysalicylate, ellagic acid, ascorbic acid, ascorbic acid glucoside, ascorbic acid derivatives such as magnesium ascorbyl phosphate, etc.); enhancers (e.g., royal jelly, photosensitizers, cholesterol derivatives, etc.); blood circulation promoters (e.g., nonylic acid valenylamide, nicotinic acid benzyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, ginger, etc.); antiseborrheic agents (e.g., sulfur, thianthol, etc.); anti-inflammatory agents (e.g., glycyrrhizinate, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, thiotaurine, hypotaurine, etc.), vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2, vitamin B2 derivatives, vitamin B12, vitamin B15, vitamin B15 derivatives, etc.

[0070] (Total HLB of the surfactants blended) The oil-in-water emulsion composition of the present invention has a total HLB of 12 or less. Here, "surfactants blended" means all surfactants, such as anionic surfactants and amphoteric surfactants blended in the oil-in-water emulsion composition of the present invention, in addition to (a) cationic polysaccharides and (b) nonionic surfactants. Furthermore, "HLB (Hydrophilic-Lipophilic Balance)" is a value generally indicating the affinity of a surfactant to water and oil, and is a parameter known as the hydrophilic-lipophilic balance, which can be easily determined by known calculation methods such as the Griffin method. Furthermore, "total HLB" is the arithmetic average of the HLB values ​​of each surfactant based on their blending ratio, and can be determined by the following formula (1): Total HLB=Σ(HLBx×Wx) / ΣWx (1) HLBx indicates the HLB value of each surfactant, and Wx indicates the amount (g) of surfactant X having the value of HLBx.

[0071] By adjusting the total HLB of the surfactants to 12 or less, it is possible to prevent the formulation from being re-emulsified by sweat or water and washed away after application. The total HLB of the surfactants is preferably 11 or less, and more preferably 10 or less. In order to maintain the stability of the formulation, the total HLB of the surfactants is preferably 6 or more, more preferably 6.5 or more, and even more preferably 7.0 or more.

[0072] The oil-in-water emulsion composition of the present invention can be prepared according to a method commonly used for oil-in-water emulsion compositions, i.e., by separately mixing the aqueous phase component and the oil phase component, and emulsifying the aqueous phase component by adding the oil phase component while stirring.

[0073] The oil-in-water emulsion composition of the present invention has good spreadability, water resistance, and ease of washing off, and can therefore be used, for example, in lotions, milky lotions, creams, beauty serums, foundations, makeup bases, concealers, sunscreen cosmetics, and the like.

[0074] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. Furthermore, the blending amounts in the following examples are expressed in mass % unless otherwise specified.

[0075] [Examples 1 to 9, Comparative Examples 1 to 5] Of the components listed in Table 1, the aqueous components were thoroughly mixed using a disper. A separately mixed oily component was added to the aqueous components and stirred to prepare an oil-in-water emulsion composition. The numerical values ​​in the table are in mass %.

[0076] [Evaluation] The following evaluations were carried out for the above Examples and Comparative Examples. The evaluation results are shown in Table 1.

[0077] <Formulation Condition> Separation and aggregation in each cosmetic preparation were checked visually and by touch, and evaluated based on the following evaluation criteria. A was determined to be a practical level. (Evaluation criteria) A: Uniform and no aggregation C: Separation or aggregation occurred

[0078] <Evaluation of usability after application: spreadability> Ten panelists applied each cosmetic product to their skin at a dose of 2 mg / cm. ２ The cosmetic was applied with a 10-point scale, and the ease of spreading was scored according to the following evaluation criteria. (Score criteria) 3: Spreads well 2: Can't say either way 1: Spreads poorly Furthermore, the average score of the 10 panelists was calculated, and the usability was evaluated based on the following overall evaluation criteria. The ratings of "AA" and "A" were judged to be practical levels. (Overall evaluation criteria) AA: Average value is 2.8 or more A: Average value is 2.5 or more and less than 2.8 B: Average value is 2.0 or more and less than 2.5 C: Average value is less than 2.0 -: Evaluation not performed

[0079] <Water resistance> Each cosmetic was applied to the skin of 10 panelists at a dose of 2 mg / cm. ２and dried for 10 minutes. Thereafter, the applied area was exposed to running water for 1 minute, and the remaining amount of cosmetic was checked visually and by touch compared to before running water (after drying), and scored according to the following evaluation criteria. (Score criteria) 3: Almost all of the cosmetic remains when compared with the state after running water after application 2: Some of the cosmetic remains when compared with the state after running water after application, but it has come off slightly 1: Almost no cosmetic remains when compared with the state after running water after application Furthermore, the average scores of the 10 panelists were calculated, and the usability was evaluated based on the following overall evaluation criteria. Ratings of "AA" and "A" were judged to be at a practical level. (Overall evaluation criteria) AA: Average value is 2.8 or more A: Average value is 2.5 or more and less than 2.8 B: Average value is 2.0 or more and less than 2.5 C: Average value is less than 2.0 -: Evaluation not performed

[0080] <Ease of Washing> Ten panelists applied each cosmetic product to their skin at a dose of 2 mg / cm. ２ and allowed to dry for 10 minutes. Thereafter, body soap (trade name "Kuyura", manufactured by Fine Today Co., Ltd.) was applied, rubbed with hands in a circular motion 50 times, and rinsed off with tap water. The remaining amount of cosmetic was checked visually and by touch compared to before application of the body soap (after drying), and scored according to the following criteria. (Score criteria) 3: Almost no cosmetic remains after washing compared to after application 2: Some cosmetic remains after washing compared to after application 1: Almost no cosmetic remains after washing compared to after application Furthermore, the average score of the 10 panelists was calculated, and the usability was evaluated based on the following overall evaluation criteria. Ratings of "AA" and "A" were determined to be at a practical level. (Overall evaluation criteria) AA: Average value is 2.8 or more A: Average value is 2.5 or more and less than 2.8 B: Average value is 2.0 or more and less than 2.5 C: Average value is less than 2.0 -: Not evaluated

[0081]

[0082] As shown in Table 1, the examples in which (a) a cationized polysaccharide is contained in the continuous phase (aqueous phase) and (b) a nonionic surfactant is contained, and the total HLB of the surfactants blended is 12 or less, are found to have good spreadability and excellent water resistance, as well as ease of washing. Furthermore, as shown in Example 8, the oil-in-water emulsion composition of the present invention can stably blend a large amount of hydrophobic powder.

[0083] Formulation examples of the oil-in-water emulsion composition of the present invention are given below, but the present invention is not limited to these. All of the oil-in-water emulsion compositions obtained by the following formulation examples had good spreadability and excellent water resistance and washability.

[0084] [Formulation Example 1] Foundation (1) Purified water 43.46 (mass%) (2) Dipropylene glycol 7.00 (3) Butylene glycol 3.00 (4) Guar hydroxypropyltrimonium chloride (cationized guar gum) 0.40 (5) Pentylene glycol 0.50 (6) Phenoxyethanol 0.30 (7) Polyglyceryl-10 laurate 0.50 (8) Polyglyceryl-10 trioleate 0.60 (9) Sorbitan sesquiisostearate 0.30 (10) Diisostearyl malate 3.00 (11) Isododecane 10.00 (12) Isopropyl myristate 5.00 (13) Isononyl isononanoate 5.00 (14) (C15-19) alkane 5.00 (15) Hydrophobic treated pigment grade titanium dioxide 6.00 (16) Hydrophobic treated iron oxide (red) 1.48 (17) Hydrophobic treated iron oxide (yellow) 4.40 (18) Hydrophobic treated iron oxide (black) 0.06 (19) Silica 3.00 (20) Starch octenyl succinate aluminum 1.00

[0085] [Formulation Example 2] Foundation (1) Purified water 46.06 (mass %) (2) Dipropylene glycol 10.00 (3) Guar hydroxypropyltrimonium chloride (cationized guar gum) 0.40 (4) Pentylene glycol 0.50 (5) Phenoxyethanol 0.30 (6) Polyglyceryl-10 trioleate 1.50 (7) Sorbitan sesquiisostearate 0.30 (8) Dimethicone 3.00 (9) Cyclopentasiloxane 10.00 (10) Caprylyl methicone 3.00 (11) Diphenylsiloxyphenyl trimethicone 2.00 (12) Hydrophobically treated pigment-grade titanium dioxide 6.00 (13) Hydrophobically treated iron oxide (red) 1.48 (14) Hydrophobically treated iron oxide (yellow) 4.40 (15) Hydrophobic Treated Iron Oxide (Black) 0.06 (16) Trimethylsiloxysilicate 5.00 (17) Polymethylsilsesquioxane 3.00 (18) (Vinyl Dimethicone / Methicone Silsesquioxane) Crosspolymer 1.00 (19) (HDI / Trimethylol Hexyllactone) Crosspolymer 2.00

[0086] [Formulation Example 3] Sunscreen (1) Purified water 46.40 (mass%) (2) Dipropylene glycol 10.00 (3) Guar hydroxypropyltrimonium chloride (cationized guar gum) 0.40 (4) Pentylene glycol 0.50 (5) Phenoxyethanol 0.30 (6) Polysorbate 80 0.65 (7) Sorbitan sesquiisostearate 0.75 (8) Diisostearyl malate 2.00 (9) PG dicaprate 5.00 (10) Alkyl benzoate (C12-15) 5.00 (11) Triethoxycaprylylsilane zinc oxide 5.00 (12) Triethoxycaprylylsilane titanium dioxide 1.50 (13) Ethylhexyl methoxycinnamate 7.50 (14) Bisethylhexyloxyphenol methoxyphenyl triazine 1.00 (15) Octocrylene 3.00 (16) Ethylhexyl salicylate 3.00 (17) Homosalate 5.00 (18) Polymethylsilsesquioxane 3.00

[0087] [Formulation Example 4] Non-chemical sunscreen (1) Purified water 43.90 (mass%) (2) Dipropylene glycol 10.00 (3) Guar hydroxypropyltrimonium chloride (cationized guar gum) 0.40 (4) Pentylene glycol 0.50 (5) Phenoxyethanol 0.30 (6) Polyglyceryl-10 laurate 0.50 (7) Polyglyceryl-10 trioleate 0.60 (8) Sorbitan sesquiisostearate 0.30 (9) Caprylic / capric triglyceride 3.00 (10) Diisostearyl malate 1.50 (11) Dimethicone 3.00 (12) (C15-19) alkane 15.00 (13) Sugar squalane 3.00 (14) Triethoxycaprylylsilane Zinc Oxide 10.00 (15) Triethoxycaprylylsilane Titanium Oxide 3.00 (16) Silica 3.00 (17) Aluminum Octenylsuccinate Starch 2.00

[0088] Formulation Example 5 Makeup Base (1) Purified water 58.40 (mass %) (2) Dipropylene glycol 10.00 (3) Guar hydroxypropyltrimonium chloride (cationized guar gum) 0.40 (4) Pentylene glycol 0.50 (5) Phenoxyethanol 0.30 (6) Polysorbate 80 0.65 (7) Sorbitan sesquiisostearate 0.75 (8) Dimethicone 15.00 (9) Diphenylsiloxyphenyl trimethicone 2.00 (10) Isopropyl myristate 1.00 (11) Trimethylsiloxysilicate 3.00 (12) Aluminum starch octenylsuccinate 3.00 (13) (Vinyl dimethicone / methicone silsesquioxane) crosspolymer 5.00

[0089] [Formulation Example 6] Emulsion (1) Purified water 67.30 (mass%) (2) Butylene Glycol 8.00 (3) Guar hydroxypropyltrimonium chloride (cationized guar gum) 0.40 (4) Pentylene glycol 1.00 (5) Phenoxyethanol 0.40 (6) Glycerin 3.00 (7) Diglycerin 1.00 (8) PEG-1000 3.00 (9) Polyglyceryl-10 laurate 0.50 (10) Polysorbate 80 0.65 (11) Sorbitan sesquiisostearate 0.75 (12) Ethylhexyl palmitate 3.00 (13) Sugar squalane 3.00 (14) Al starch octenylsuccinate 3.00 (15) (Vinyl dimethicone / methicone silsesquioxane) crosspolymer 5.00

[0090] [Formulation Example 7] Mist (1) Purified water 71.00 (mass%) (2) Butylene Glycol 8.00 (3) Xanthan hydroxypropyltrimonium chloride (cationized xanthan gum) 0.20 (4) Pentylene glycol 1.00 (5) Phenoxyethanol 0.40 (6) PEG-1000 3.00 (7) Polysorbate 80 0.65 (8) Sorbitan sesquiisostearate 0.75 (9) Dimethicone 5.00 (10) Trimethylsiloxysilicate 5.00 (11) Polymethylsilsesquioxane 5.00

[0091] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and changes are possible within the scope of the gist of the present invention as set forth in the claims.

Claims

1. An oil-in-water type emulsion composition having (a) a cationized polysaccharide in the continuous phase, containing (b) a nonionic surfactant, and having a total HLB of the surfactants to be blended of 12 or less.

2. The oil-in-water type emulsion composition according to claim 1, wherein the (a) cationized polysaccharide is at least one selected from cationized cellulose, cationized fenugreek gum, cationized guar gum, cationized tara gum, cationized locust bean gum, and cationized xanthan gum.

3. The oil-in-water type emulsion composition according to claim 1, wherein the total HLB of the surfactants to be blended is 6 or more.

4. The oil-in-water type emulsion composition according to claim 1, wherein the blending amount of the (a) cationized polysaccharide is 0.1% by mass or more and 2.0% by mass or less based on the total amount of the oil-in-water type emulsion composition.

5. The oil-in-water type emulsion composition according to claim 1, containing (c) an oily component, wherein the blending amount of the (c) oily component is 10% by mass or more based on the total amount of the oil-in-water type emulsion composition.

6. The oil-in-water type emulsion composition according to claim 1, wherein the blending amount of the (b) nonionic surfactant is 0.1% by mass or more and 10.0% by mass or less based on the total amount of the oil-in-water type emulsion composition.

7. The oil-in-water type emulsion composition according to claim 1, containing a hydrophobic powder.

8. The oil-in-water type emulsion composition according to claim 7, wherein the hydrophobic powder is at least one selected from hydrophobic treated titanium oxide, hydrophobic treated zinc oxide, hydrophobic treated cerium oxide, and hydrophobic treated pigments.

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