Oil-in-water emulsion composition

Abstract

To provide a sunscreen cosmetic that suppresses the precipitation of an ultraviolet absorber and achieves improved user feel.SOLUTION: An oil-in-water emulsion composition comprises: (a) polyglyceryl-2 stearate; (b) glyceryl stearate; (c) stearyl alcohol; (d) a water-soluble thickener; (e) an ultraviolet absorber that is solid at 25°C; and (f) a polar oil that is liquid at 25°C and has an IOB value exceeding 0.1.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an oil-in-water emulsion composition suitable for use in sunscreen cosmetics. [Background technology]

[0002] In order to prevent damage to the skin caused by ultraviolet rays, various UV care cosmetics have been developed. One type of UV care cosmetic is a sunscreen cosmetic (sunscreen, sun protector), which contains ultraviolet absorbing agents, ultraviolet scattering agents, etc., and is intended to protect the skin from the harmful effects of ultraviolet rays by blocking ultraviolet rays in sunlight (Non-Patent Document 1). In general, sunscreen cosmetics generally contain ultraviolet absorbing agents and ultraviolet scattering agents as ultraviolet protection agents. In addition, since sunscreen cosmetics are applied over a wide area such as the face and body, they are required to have an excellent feel when used, and oil-in-water emulsion types that provide a fresh and light feel are preferred. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] "Cosmetics Encyclopedia", edited by the Japanese Society of Cosmetic Technologists, published by Maruzen Co., Ltd., 2004, pp. 495-496 Summary of the Invention [Problem to be solved by the invention]

[0004] When the UV absorbent contained in a sunscreen cosmetic is in a solid form, there is a problem that it is prone to precipitation over time, and the skin that has been applied with the sunscreen cosmetic may feel dry and squeaky. Therefore, an object of the present invention is to provide a sunscreen cosmetic composition which inhibits precipitation of an ultraviolet absorbent and has an excellent feel when used. [Means for solving the problem]

[0005] Means for Solving the Problems The present inventors have conducted intensive research to solve the above-mentioned problems, and as a result have come to the conclusion that the above-mentioned problems can be solved by an oil-in-water emulsion composition containing (a) polyglyceryl-2 stearate, (b) glyceryl stearate, (c) stearyl alcohol, (d) a water-soluble thickener, (e) an ultraviolet absorber that is solid at 25°C, and (f) a polar oil that is liquid at 25°C and has an IOB value of more than 0.1, and have thus completed the present invention.

[0006] That is, the present invention is as follows. [1] An oil-in-water emulsion composition comprising the following components (a) to (f): (a) Polyglyceryl-2 Stearate (b) Glyceryl stearate (c) Stearyl alcohol (d) Water-soluble thickener (e) UV absorber that is solid at 25°C (f) Polar oils that are liquid at 25°C and have an IOB value of more than 0.1 [2] The composition according to [1], wherein component (d) is an acrylic acid-based polymer. [3] The composition according to [2], wherein the acrylic acid-based polymer comprises a carboxyvinyl polymer and / or an (acrylates / C10-30 alkyl acrylate) crosspolymer. [4] Component (e) is diethylamino hydroxybenzoyl hexyl benzoate, ethyl hexyl The composition according to any one of [1] to [3], comprising one or more selected from xyltriazone and t-butyl methoxydibenzoylmethane. [5] The composition according to any one of [1] to [4], which is a sunscreen cosmetic. Effect of the Invention

[0007] The composition of the present invention can suppress the precipitation of solid ultraviolet absorbers by using a specific liquid polar oil. Generally, it is difficult to stably emulsify liquid polar oil and incorporate it in a large amount in a composition, but by using polyglyceryl-2 stearate, glyceryl stearate, stearyl alcohol, and a water-soluble thickener, the liquid polar oil can be stably emulsified in a large amount, and as a result, the crystal precipitation of solid ultraviolet absorbers can be further suppressed. In addition, the composition of the present invention can contain a large amount of solid ultraviolet absorbers without causing precipitation, so that the ultraviolet protection power (SPF) of the composition can be enhanced. In addition, the liquid polar oil imparts a moist feel to the skin to which it is applied, and its presence masks the squeaky feeling that is characteristic of UV absorbents, suppressing the squeaky feeling upon application and providing an excellent feel in use. Furthermore, the composition of the present invention has excellent emulsion stability even when stored over time and at different temperatures. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] The oil-in-water emulsion composition of the present invention contains (a) polyglyceryl-2 stearate, (b) glyceryl stearate, (c) stearyl alcohol, (d) a water-soluble thickener, (e) an ultraviolet absorber that is solid at 25°C, and (f) a polar oil that is liquid at 25°C and has an IOB value of greater than 0.1.

[0009] (a) Polyglyceryl-2 stearate can stably emulsify a large amount of liquid polar oil, and therefore indirectly contributes to suppressing crystal precipitation of solid ultraviolet absorbers. The content of (a) polyglyceryl-2 stearate in the composition of the present invention is preferably 0.1 to 10 wt %, more preferably 0.5 to 5 wt %, and even more preferably 1 to 3 wt %, of the total composition. By using the compound within such a range, it becomes easier to emulsify the polar oil more stably.

[0010] (b) Glyceryl stearate can stably emulsify a large amount of liquid polar oil, and therefore indirectly contributes to suppressing crystal precipitation of the solid ultraviolet absorber. The content of (b) glyceryl stearate in the composition of the present invention is preferably 0.1 to 8 wt %, more preferably 0.3 to 5 wt %, and even more preferably 0.5 to 3 wt %, of the total composition. By using the compound within such a range, it becomes easier to emulsify the polar oil more stably.

[0011] (c) Stearyl alcohol can stably emulsify a large amount of liquid polar oil, and therefore indirectly contributes to suppressing crystal precipitation of the solid ultraviolet absorber. The content of (c) stearyl alcohol in the composition of the present invention is preferably 0.1 to 8 wt %, more preferably 0.3 to 5 wt %, and even more preferably 0.5 to 3 wt %, of the total composition. By using the compound within such a range, it becomes easier to emulsify the polar oil more stably.

[0012] (d) The water-soluble thickener is not particularly limited as long as it is one that is commonly used in cosmetics. By adding such a component, the emulsion particles can be stably and uniformly dispersed by imparting viscosity to the aqueous phase, which indirectly contributes to suppressing crystal precipitation of the solid ultraviolet absorber. Specific examples of the water-soluble thickener include acrylic acid-based polymers (e.g., polyacrylic acid or a salt thereof, polyethyl acrylate, polyacrylamide), which may have any substituent. Preferred examples of the polymer include vinyl polymers (e.g., polyvinyl alcohol, polyvinyl chloride, polyvinyl methyl ether, polyvinyl acetate, polyvinylpyrrolidone, vinyl acetate-vinylpyrrolidone copolymers, etc.). Of these, acrylic acid polymers which are polymers / copolymers of acrylic acid monomers are more preferred, and carboxyvinyl polymers and / or (acrylates / alkyl acrylate (C10-30)) crosspolymers are more preferred.

[0013] The weight average molecular weight of the water-soluble thickener is preferably 2,000 to 20,000, more preferably 3,000 to 10,000, and further preferably 4,000 to 8,000.

[0014] The content of the (d) water-soluble thickener in the composition of the present invention is preferably 0.01 to 5 wt %, more preferably 0.05 to 3 wt %, and even more preferably 0.1 to 1 wt %, of the total composition. By using it within such a range, the emulsion system becomes more stable.

[0015] (e) The ultraviolet absorber that is solid at 25°C may be one that is commonly used in cosmetics, such as a para-aminobenzoic acid ultraviolet absorber, an anthranilic acid ultraviolet absorber, a salicylic acid ultraviolet absorber, a cinnamic acid ultraviolet absorber, a benzophenone ultraviolet absorber, or a sugar ultraviolet absorber, and among these, one that is solid at 25°C is used. Here, "solid" refers to a state in which there is no fluidity at 25°C and atmospheric pressure, and which does not deform in the absence of stress, or which does not deform substantially even when a slight stress is applied. Usually, it refers to one that has a melting point of 30 to 55°C under atmospheric pressure. Specific preferred examples of the component (e) include diethylaminohydroxybenzoylhexyl benzoate, ethylhexyl triazone, t-butyl methoxydibenzoylmethane, and bisethylhexyloxyphenol methoxyphenyl triazine.

[0016] The content of the ultraviolet absorber (e) in the composition of the present invention is preferably 0.1 to 10% by weight, more preferably 0.5 to 8% by weight, and further preferably 1 to 6% by weight, of the total composition. By using it within such a range, it becomes easier to obtain the desired ultraviolet protection effect.

[0017] By using (f) a polar oil that is liquid at 25°C and has an IOB value of more than 0.1, it is possible to suppress precipitation of (e) a solid ultraviolet absorber. By incorporating component (f), it is possible to impart a moist feel to the skin to which the composition is applied, and the squeaky feeling specific to component (e) is masked, thereby making the composition have an excellent feel when used. Here, being liquid at 25° C. means having fluidity at 25° C. under atmospheric pressure. Additionally, the IOB value of component (f) is greater than 0.1 and preferably less than 0.6.

[0018] The IOB value is an abbreviation for Inorganic / Organic Balance, which is a value that represents the ratio of inorganic value to organic value, and is an index that indicates the degree of polarity of an organic compound. Specifically, the IOB value is expressed as IOB value = inorganic value / organic value. For each of the "inorganic value" and "organic value", "inorganic value" is set according to various atoms or functional groups, for example, the "organic value" is 20 for one carbon atom in a molecule, and the "inorganic value" is 100 for one hydroxyl group, and the "inorganic value" and "organic value" of each atom and functional group in an organic compound are added up, and the IOB value of the organic compound can be calculated by accumulating the "inorganic value" and "organic value" of the organic compound (for example, see "Organic Conceptual Diagram - Basics and Applications" by Yoshio Koda, pp. 11-17, Sankyo Publishing, 1984).

[0019] Preferred examples of component (f) include dicaprylyl carbonate (IOB value = 0.235), caprylic / capric triglyceride (IOB value = 0.309), ethylhexyl salicylate (IOB value = 0.600), oleic acid (IOB value = 0.42), isostearic acid (IOB value = 0.43), isopropyl myristate (IOB value = 0.18), octyl palmitate (IOB value = 0.13), isopropyl palmitate (IOB value = 0.16), sucrose, ethylhexyl ether (IOB value = 0.200), ethylhexyl ether (IOB value = 0.210), ethylhexyl ether (IOB value = 0.220), ethylhexyl ether (IOB value = 0.235), ethylhexyl ether (IOB value = 0.240), ethylhexyl ether (IOB value = 0.250), ethylhexyl ether (IOB value = 0.260), ethylhexyl ether (IOB value = 0.270), ethylhexyl ether (IOB value = 0.280), ethylhexyl ether (IOB value = 0.29 ... Butyl tearic acid (IOB value = 0.14), hexyl laurate (IOB value = 0.17), myristyl myristate (IOB value = 0.11), decyl oleate (IOB value = 0.11), isononyl isononanoate (IOB value = 0.20), isotridecyl isononanoate (IOB value = 0.15), cetyl ethylhexanoate (IOB value = 0.13), glycol distearate (IOB value = 0.16), glyceryl diisostearate (IOB value = 0.29) , neopentyl glycol dicaprate (IOB value = 0.25), diisostearyl malate (IOB value = 0.28), trimethylolpropane triisostearate (IOB value = 0.16), glyceryl tri-2-ethylhexanoate (triethylhexanoin) (IOB value = 0.35), trimethylolpropane trioctanoate (IOB value = 0.33), diisobutyl adipate (IOB value = 0.46), N-lauroyl-L-glutamate-2-octyl Examples include dodecyl ester (IOB value = 0.29), 2-hexyldecyl adipate (IOB value = 0.16), diisopropyl sebacate (IOB value = 0.40), ethylhexyl methoxycinnamate (IOB value = 0.28), olive oil (IOB value = 0.16), castor oil (IOB value = 0.43), decyltetradecanol (IOB value = 0.21), octyldodecanol (IOB value = 0.26), and oleyl alcohol (IOB value = 0.28).

[0020] The content of the (f) polar oil in the composition of the present invention is preferably 10 to 40% by weight, more preferably 15 to 35% by weight, and further preferably 25 to 30% by weight, of the entire composition. By using it within such a range, precipitation of the component (e) can be more easily suppressed.

[0021] The formulation of the composition of the present invention is an oil-in-water emulsion. The oil-in-water emulsion is not particularly limited as long as the outermost phase is an aqueous phase, and may be an O / W type, a W / O / W type, or an (O1+O2) / W type.

[0022] The compositions of the present invention contain an aqueous phase component and an oil phase component. The composition of the present invention contains water as an aqueous phase component. In addition to water, the aqueous phase component may be any component that dissolves in water at 25 to 90°C. Usually, component (d) is included in the aqueous phase component. Although components (a), (b), and (c) can be dissolved in both the aqueous phase and the oil phase, they may be included in the aqueous phase component for convenience when calculating the internal phase ratio described later. The oil phase component is not limited to oils, but generally includes powders and the like, and may be any component that undergoes phase separation from water after being suspended in water at 25 to 90°C and left to stand for 1 hour. Usually, components (e) and (f) are included in the oil phase component. In the composition of the present invention, the weight ratio of the contents of the aqueous phase component to the oil phase component (internal phase ratio) is not particularly limited, but is preferably 99:1 to 50:50, more preferably 95:5 to 70:40.

[0023] The composition of the present invention provides a fresh feel and is free of squeaky feeling, and can be used with a good feel. In addition, it has excellent storage stability over time and temperature, and the ultraviolet absorber is unlikely to precipitate.

[0024] The composition of the present invention can be produced according to a conventional method for producing an oil-in-water emulsion type.

[0025] The composition of the present invention may contain any other components that are usually used in cosmetics, so long as the effects of the present invention are not impaired. Examples of such optional components include other oils, powders, other alcohols, ethers, moisturizing agents, other surfactants, sequestering agents, pearlescent agents, amino acids, organic amines, polymer emulsions, pH adjusters, vitamins, antioxidants, preservatives, other water-soluble polymers, fragrances, various active ingredients, UV scattering agents, etc.

[0026] Other oil agents include silicone oils, other polar oils, natural oils, hydrocarbons, and the like.

[0027] Silicone oils include dimethylpolysiloxane (dimethicone), cyclopentasiloxane, decamethylcyclopentasiloxane, caprylyl methicone, trimethylsiloxysilicate, dimethicone / vinyl dimethicone crosspolymer, dimethicone / phenylvinyl dimethicone crosspolymer, and the like.

[0028] Other polar oils include synthetic ester oils, cetyl octanoate, octyldodecyl myristate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexyl, dipentaerythritol fatty acid esters, N-alkyl glycol monoisostearate, glyceryl di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexyl, pentane erythritol tetra-2-ethylhexyl, and glyceryl tri-2-ethylhexanoate. Examples of suitable oils include lyceryl, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleic acid oil, cetostearyl alcohol, acetoglyceride, 2-heptylundecyl palmitate, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-ethylhexyl succinate, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, and octyl methoxycinnamate.

[0029] Examples of natural oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese giri oil, Japanese tung oil, jojoba oil, germ oil, sunflower oil, triglycerin, glyceryl trioctanoate, and glyceryl triisopalmitate.

[0030] Examples of the hydrocarbon oil include isododecane, isohexadecane, squalane, hydrogenated poly(C6-12) olefin, and hydrogenated polyisobutene.

[0031] The powder may be spherical, needle-like, plate-like, or the like, and its shape is not particularly limited. Examples of the powder include inorganic white pigments (e.g., titanium dioxide, zinc oxide, etc.); inorganic red pigments (e.g., iron oxide (red oxide), iron titanate, etc.); inorganic brown pigments (e.g., γ-iron oxide, etc.); inorganic yellow pigments (e.g., yellow iron oxide, ocher, etc.); inorganic black pigments (e.g., black iron oxide, low-order titanium oxide, etc.); inorganic purple pigments (e.g., mango violet, cobalt violet, etc.); inorganic green pigments (e.g., chromium oxide, chromium hydroxide, cobalt titanate, etc.); inorganic blue pigments (e.g., ultramarine, navy blue, etc.). blue, etc.); pearl pigments (e.g., titanium dioxide coated mica, titanium dioxide coated bismuth oxychloride, titanium dioxide coated talc, colored titanium dioxide coated mica, bismuth oxychloride, fish scale foil, etc.); metal powder pigments (e.g., aluminum powder, copper powder, etc.); organic pigments such as zirconium, barium or aluminum lakes (e.g., Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, and Organic pigments such as Blue No. 404, Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3 and Blue No. 1, etc.; natural pigments (e.g., chlorophyll, beta-carotene, etc.); inorganic powders (e.g., talc, kaolin, mica, sericite, muscovite, phlogopite, synthetic mica, red mica, biotite, permiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, , strontium silicate, metal tungstate, magnesium, silica, alumina, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluorapatite, hydroxyapatite, ceramic powder, boron nitride, etc.); organic powders (for example, polyamide resin powder (nylon powder), polyethylene powder, poly(methyl meth)acrylate powder, polystyrene powder, styrene-acrylic acid copolymer resin powder, silicone resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, etc.);Metal soaps (e.g., zinc myristate, calcium palmitate, aluminum stearate); organically modified clay minerals (e.g., organically modified bentonite, organically modified hectorite, etc.);

[0032] Other alcohols include monohydric alcohols such as cetanol, batyl alcohol, behenyl alcohol, palmitoleic alcohol, heptadecanol, 1-heptadecanol, isostearyl alcohol, elaidyl alcohol, linoleyl alcohol, elaidolinoleyl alcohol, linolenyl alcohol, elaidolinolenyl alcohol, ricinoleyl alcohol, nonadecyl alcohol, arachidyl alcohol, heneicosanol, behenyl alcohol, and erucyl alcohol; ethylene glycol, 1,3-butylene glycol, trimethylene glycol, 1,2-butylene glycol, propanol, and the like. Dihydric alcohols such as propylene glycol, dipropylene glycol, propanediol, 1,2-pentanediol, 3-methyl-1,3-butanediol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, and octylene glycol; trihydric alcohols such as trimethylolpropane; tetrahydric alcohols such as pentaerythritol; pentahydric alcohols such as xylitol; polyhydric alcohol polymers such as triglycerin, tetraglycerin, and polyglycerin; sugar alcohols such as starch decomposition sugar reduced alcohols; polyglycerin; Alcohol alkyl ethers such as 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, and ethylene glycol isopropyl ether; alcohol alkyl ethers such as diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl 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; glycerin monoalkyl ethers such as xyl alcohol, selachyl alcohol, and batyl alcohol; Alcohol polymers such as diethylene glycol, triethylene glycol, polypropylene glycol, tetraethylene glycol, and polyethylene glycol; 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, etc.

[0033] As for ethers, in addition to those corresponding to the above alcohols, Examples of the ethylene glycol dimethyl ether include ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol methyl ethyl ether, 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.

[0034] Examples of moisturizing agents include chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO)PO adduct, Rosa rugosa extract, Achillea millefolium extract, and Melilot extract.

[0035] Other surfactants include anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants.

[0036] Examples of 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 triethanolamine lauryl sulfate, sodium POE lauryl sulfate, etc.); N-acyl sarcosinates (e.g., sodium lauroyl sarcosinate, etc.); higher fatty acid amide sulfonates (e.g., sodium N-myristoyl-N-methyl taurine, sodium coconut oil fatty acid methyl tauride, sodium lauryl methyl tauride, etc.); phosphates (sodium POE oleyl ether phosphate, sodium POE stearyl ether phosphate, etc.); sulfosuccinates (e.g., sodium di-2-ethylhexyl sulfosuccinate, sodium monolauroyl monoethanolamide polyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol ... sodium citrate, etc.); alkylbenzene sulfonates (e.g., sodium linear dodecylbenzene sulfonate, triethanolamine linear dodecylbenzene sulfonate, linear dodecylbenzene sulfonic acid, etc.); higher fatty acid ester sulfate salts (e.g., sodium hydrogenated coconut oil fatty acid glycerin sulfate, etc.); N-acyl glutamates (e.g., monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, monosodium N-myristoyl-L-glutamate, etc.); sulfated oils (e.g., turmeric oil, etc.); POE alkyl ether carboxylic acids; POE alkyl allyl ether carboxylates; α-olefin sulfonates; higher fatty acid ester sulfonates; secondary alcohol sulfate salts; higher fatty acid alkylolamide sulfate salts; sodium lauroyl monoethanolamide succinate; ditriethanolamine N-palmitoyl aspartate; sodium caseinate, etc.

[0037] Examples of cationic surfactants include alkyltrimethylammonium salts (e.g., stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (e.g., cetylpyridinium chloride, etc.); distearyldimethylammonium chloride, dialkyldimethylammonium salts; poly(N,N'-dimethyl-3,5-methylenepiperidinium chloride); alkyl quaternary ammonium salts; alkyldimethylbenzylammonium salts; alkylisoquinolinium salts; dialkylmorphonium salts; POE alkylamines; alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; benzethonium chloride, etc.

[0038] 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-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryl dimethylaminoacetic acid betaine, alkyl betaine, amido betaine, sulfobetaine, etc.).

[0039] Examples of nonionic surfactants include polyether-modified silicones (e.g., polyethylene glycol-10 dimethicone, polyethylene glycol-12 dimethicone, lauryl PEG-9 polydimethylsiloxyethyl dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, etc.); polyglycerin-modified silicones (e.g., polyglyceryl-3 disiloxane dimethicone, polyglyceryl-3 polydimethylsiloxyethyl dimethicone, etc.); sorbitan fatty acid esters (e.g., sorbitan monooleate, sorbitan monostearate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, etc.). , sorbitan sesquioleate, sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexyl acid, diglycerol sorbitan tetra-2-ethylhexyl acid, etc.); glycerin fatty acids (e.g., glycerin monocottonseed oil fatty acid, glycerin monoerucate, glycerin sesquioleate, glycerin α,α'-oleic acid pyroglutamic acid, glycerin monostearate malate, etc.); propylene glycol fatty acid esters (e.g., propylene glycol monostearate, etc.); POE castor oil / hydrogenated castor oil derivatives (POE castor oil, POE hydrogenated castor oil, etc.); and non-hydrophilic nonionic surfactants such as glycerin alkyl ethers. Also, other polyglycerol fatty acid esters (e.g., polyglyceryl monooleate, etc.); POE sorbitan fatty acid esters (e.g., POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan tetraoleate, etc.); POE sorbit fatty acid esters (e.g., POE sorbit monolaurate, POE sorbit monooleate, POE sorbit pentaoleate, POE sorbit monostearate, etc.); POE glycerin fatty acid esters (e.g., POE monooleates such as POE glycerin monostearate, POE glycerin monoisostearate, POE glycerin triisostearate, etc.); POE fatty acid esters (e.g., POE distearate, POE monodioleate, ethylene glycol distearate, etc.);POE alkyl ethers (e.g., POE lauryl ether, POE oleyl ether, POE stearyl ether, POE-behenyl ether, POE-2-octyldodecyl ether, POE cholestanol ether, etc.); POE alkyl phenyl ethers (e.g., POE nonylphenyl ether, etc.); Pluronic types (e.g., Pluronic (registered trademark), etc.); POE·POP alkyl ethers (e.g., 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 (e.g., Tetronic, etc.); POE castor oil hydrogenated castor oil derivatives (e.g., 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.); POE beeswax / lanolin derivatives (e.g., POE sorbitol beeswax, etc.); alkanolamides (e.g., coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, etc.); POE propylene glycol fatty acid esters; POE alkylamines; POE fatty acid amides; sucrose fatty acid esters; alkyl glucosides; alkyl ethoxy dimethylamine oxides; and hydrophilic nonionic surfactants such as trioleyl phosphate.

[0040] 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.

[0041] Examples of pearlescent agents include titanium mica.

[0042] Examples of the amino acid include neutral amino acids (e.g., threonine, cysteine, etc.), basic amino acids (e.g., hydroxylysine, etc.), etc. Examples of the amino acid derivatives include sodium acyl sarcosine (sodium lauroyl sarcosine), acyl glutamate, sodium acyl β-alanine, glutathione, pyrrolidone carboxylic acid, etc.

[0043] Examples of the organic amine include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol.

[0044] Examples of polymer emulsions include acrylic resin emulsions, polyethyl acrylate emulsions, acrylic resin liquids, polyacrylic alkyl ester emulsions, polyvinyl acetate resin emulsions, and natural rubber latex.

[0045] Examples of pH adjusters include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate, and are usually used to adjust the pH of the external phase (aqueous component).

[0046] Examples of vitamins include vitamins A, B1, B2, B6, C, E and their derivatives, pantothenic acid and its derivatives, biotin, etc.

[0047] Examples of antioxidants include tocopherols, dibutylhydroxytoluene (BHT), butylhydroxyanisole, pyrosulfite, gallic acid esters, phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, cephalin, hexametaphosphate, phytic acid, and ethylenediaminetetraacetic acid.

[0048] Examples of preservatives include parabens and phenoxyethanol.

[0049] Other water-soluble polymers include natural water-soluble polymers such as plant-based 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), glycyrrhizic acid); microbial polymers (e.g., xanthan gum, dextran, succinoglucan, pullulan, etc.); and animal-based polymers (e.g., collagen, casein, albumin, gelatin, etc.); semi-synthetic water-soluble polymers such as starch-based polymers (e.g., carboxymethyl starch, methylhydroxypropyl starch, etc.); cellulose-based polymers (hydroxypropylmethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, ethylcellulose, hydroxypropylmethylcellulose stearoxy ether, sodium cellulose sulfate, carboxymethylcellulose, sodium carboxymethylcellulose, crystalline cellulose, cellulose powder, etc.); alginic acid-based polymers (e.g., sodium alginate, propylene glycol alginate, etc.), etc. Examples of the water-soluble synthetic polymer include polyoxyethylene polymers (for example, polyethylene glycol 20,000, 40,000, 60,000, etc.); polyethyleneimine; and cationic polymers.

[0050] Examples of the various active ingredients include anti-inflammatory agents (e.g., salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.); whitening agents (e.g., placenta extract, saxifrage extract, arbutin, resorcinol derivatives, etc.); various extracts (e.g., Phellodendron bark, Coptis japonica, Lithospermum root, Peony root, Swertia japonica, Birch, Sage, Loquat, Carrot, Aloe, Mallow, Iris, Grape, Coix seed, Loofah, Lily, Saffron, Cnidium rhizome, Angelica acutiloba, Hypericum perforatum, Ononis, Garlic, Capsicum annuum, Citrus chinensis, Angelica acutiloba, Seaweed, etc.), activators (e.g., Royal jelly, photosensitizers, cholesterol derivatives, etc.), conductors, etc.); blood circulation promoters (e.g., nonylic acid valenylamide, nicotinic acid benzyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, zingerone, cantharides tincture, ichthammol, tannic acid, α-borneol, tocopherol nicotinate, inositol hexanicotinate, cyclandelate, cinnarizine, tolazoline, acetylcholine, verapamil, cepharanthine, γ-oryzanol, etc.); antiseborrheic agents (e.g., sulfur, thianthol, etc.); anti-inflammatory agents (e.g., tranexamic acid, thiotaurine, hypotaurine, glycyrrhetinic acid derivatives, etc.), etc.

[0051] Examples of the ultraviolet scattering agent include fine particle metal oxides, specifically fine particle titanium dioxide, fine particle zinc oxide, fine particle zirconium oxide, fine particle cerium oxide, etc. The surface of these fine particle metal oxides may be coated with an inorganic compound such as silica or alumina, or an organic compound such as fatty acid metal soap or silicone. EXAMPLES

[0052] The present invention will be described in more detail below with reference to examples. However, the present invention is not limited to the following examples as long as it does not depart from the gist of the present invention.

[0053] <Production Examples and Evaluation> Using the formulation shown in Table 1, the oil phase components and the aqueous phase components were each heated to 70°C and dissolved, the oil phase was added to the aqueous phase components, and emulsified while stirring with a homomixer to prepare an oil-in-water emulsion cosmetic. The obtained cosmetics were evaluated according to the following items and criteria. The results are shown in Table 1.

[0054] (emulsion state) Each cosmetic product was placed in a standard glass bottle and stored in a thermostatic chamber set at 50°C for one month, after which a specialist evaluator rated it on the following four-point scale. ◎: No change in shape 〇: Almost no change in shape △: Creaming is partially observed ×: More than half of the shape is not maintained

[0055] (Freshness when applied) When an appropriate amount of each cosmetic product was applied to the skin, expert evaluators scored whether the skin felt moisturized or not according to the following criteria. 5 points: Feels fresh and moist 4 points: Feels fresh 3 points: Feels slightly fresh 2 points: Almost no moisture 1 point: Not feeling fresh at all The average scores of the 10 evaluators were assigned to the following ratings. ◎: More than 4 points: Very good ○: More than 3 points and 4 points or less: Good △: More than 2 points, 3 points or less: slightly poor × : 2 points or less : Defective

[0056] (Skin creaking afterwards) After applying an appropriate amount of each cosmetic product to the skin, expert evaluators scored whether the skin felt squeaky or not according to the following criteria. 5: No creaking at all 4: Almost no creaking 3: I feel some creaking 2: I feel a creaking sound 1: Very creaky The average scores of the 10 evaluators were assigned to the following ratings. ○: More than 3.5 points: Good △: More than 2 points, 3.5 points or less: Fairly good × : 2 points or less : Defective

[0057] (Crystallization) Each cosmetic product was placed in a standard glass bottle and stored at low temperature (5°C) for one month, after which a specialist evaluator rated it on the following four-point scale. 〇: No crystals observed △: Some crystals are visible ×: Crystal precipitation is noticeable

[0058] [Table 1]

Claims

1. An oil-in-water emulsion composition comprising the following components (a) to (f): (a) Polyglyceryl-2 Stearate (b) Glyceryl stearate (c) Stearyl alcohol (d) Water-soluble thickener (e) an ultraviolet absorber that is solid at 25°C (f) a polar oil that is liquid at 25°C and has an IOB value of greater than 0.1

2. The composition of claim 1 , wherein component (d) is an acrylic acid-based polymer.

3. The composition of claim 2, wherein the acrylic polymer comprises a carboxyvinyl polymer and / or an acrylates / alkyl acrylate (C10-30) crosspolymer.

4. 2. The composition of claim 1, wherein component (e) comprises one or more selected from diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl triazone, and t-butyl methoxydibenzoylmethane.

5. The composition according to any one of claims 1 to 4, which is a sunscreen cosmetic.

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