Oil-in-water emulsion cosmetics

Abstract

To provide an oil-in-water-type emulsion cosmetic which contains titanium oxide and a water-soluble polymer, can keep a high ultraviolet ray protection effect and a satisfactory feeling of use, is no thickened, and has a good appearance.SOLUTION: The present invention relates to an oil-in-water-type emulsion cosmetic comprising the following components (A), (B) and (C1): (A) titanium oxide coated with a surface treating agent containing aluminum; (B) a water-soluble polymer having a sulfonic acid structure unit; and (C1) 0.6 mass% or more of an oily compound having, in the molecule thereof, at least one hydroxyl group, and at least two fatty acid groups each having 8 or more carbon atoms or at least two hydrocarbon chains each having 8 or more carbon atoms.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oil-in-water emulsified cosmetic.

Background Art

[0002] An ultraviolet absorber and an ultraviolet scattering agent are blended in an oil-in-water emulsified cosmetic to block ultraviolet irradiation to the skin and obtain a high SPF value. Titanium oxide is widely used as the ultraviolet scattering agent. As said titanium oxide, in consideration of dispersibility in the oil-in-water emulsified cosmetic, titanium oxide coated with a surface treatment agent containing a fatty acid or aluminum is used. Furthermore, it is known that when a water-soluble polymer having structural units of (meth)acrylic acid or sulfonic acid is used in combination in addition to titanium oxide coated with these surface treatment agents, an oil-in-water emulsified cosmetic that has no sticky feeling and has a fresh use feeling can be obtained (Patent Documents 1 to 3).

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problem to be Solved by the Invention

[0004] However, it has been found that an oil-in-water emulsified cosmetic that uses a combination of titanium oxide coated with a surface treatment agent containing aluminum and a water-soluble polymer having a sulfonic acid structural unit causes problems such as thickening and poor appearance. Accordingly, the present invention relates to an oil-in-water emulsified cosmetic that contains titanium oxide and a water-soluble polymer, maintains a high ultraviolet protection effect and a good use feeling, does not thicken, and has a good appearance. [Means for solving the problem]

[0005] Therefore, the inventors investigated the cause of thickening in an oil-in-water emulsion cosmetic containing titanium dioxide coated with an aluminum-containing surface treatment agent and a water-soluble polymer having sulfonic acid as a structural unit. They found that these components form structures within the oil-in-water emulsion composition, resulting in thickening of the cosmetic and an undesirable appearance. Subsequently, after various studies to suppress the thickening effect caused by the formation of these structures, the inventors discovered that by including a certain amount or more of an oily compound having one or more hydroxyl groups and two or more fatty acid groups with eight or more carbon atoms or two or more hydrocarbon chains with eight or more carbon atoms in the molecule, the thickening effect and changes in appearance can be suppressed, and an oil-in-water emulsion cosmetic that maintains high UV protection and a good feel can be obtained. Thus, the inventors completed the present invention.

[0006] In other words, the present invention relates to components (A), (B), and (C1): (A) Titanium oxide coated with a surface treatment agent containing aluminum, (B) A water-soluble polymer having a constituent unit of sulfonic acid, (C1) An oily compound having one or more hydroxyl groups and two or more fatty acid groups having 8 or more carbon atoms or two or more hydrocarbon chains having 8 or more carbon atoms in the molecule, 0.6% by mass or more. This invention provides an oil-in-water emulsion cosmetic containing the following ingredients: [Effects of the Invention]

[0007] The oil-in-water emulsion cosmetic of the present invention has a high UV protection effect and a good feel, does not thicken, has a good appearance, and is useful as a sunscreen cosmetic. [Modes for carrying out the invention]

[0008] The oil-in-water emulsion cosmetic composition of the present invention (hereinafter sometimes simply referred to as "cosmetic composition") contains the following components (A), (B), and (C1). (A) Titanium oxide coated with a surface treatment agent containing aluminum, (B) A water-soluble polymer having a constituent unit of sulfonic acid, (C1) Oily compound having one or more hydroxyl groups and two or more fatty acid groups having 8 or more carbon atoms or two or more hydrocarbon chains having 8 or more carbon atoms in the molecule: 0.6% by mass or more

[0009] Component (A) is titanium oxide particles coated with a surface treatment agent containing aluminum. As specific examples of surface treatment agents containing aluminum, surface treatment agents containing alumina and / or aluminum hydroxide are preferred from the viewpoint of improving the dispersibility of titanium dioxide particles in cosmetics, enhancing the UV protection effect of cosmetics, suppressing the whiteness of the appearance, and improving smoothness. Furthermore, surface treatment agents containing fatty acids in addition to aluminum are preferred from the viewpoint of improving the dispersibility of titanium dioxide particles in cosmetics, enhancing the UV protection effect of cosmetics, suppressing the whiteness of the appearance, and improving smoothness. Here, the fatty acid is preferably a higher fatty acid having 14 to 22 carbon atoms, and more preferably a higher fatty acid having 16 to 20 carbon atoms. Also, from a similar viewpoint, the carbon number of the fatty acid in the surface treatment agent is preferably 14 or more, more preferably 16 or more, and preferably 22 or less, and more preferably 20 or less. Furthermore, specific examples of titanium dioxide coated with an aluminum-containing surface treatment agent include alumina carbon 14-22 fatty acid treated titanium dioxide particles, and more preferred examples include alumina stearate treated titanium dioxide particles and alumina isostearate treated titanium dioxide particles. Among these, alumina stearate treated titanium dioxide particles are preferred from the viewpoint of improving the dispersibility of titanium dioxide particles in cosmetics, improving the UV protection effect of cosmetics, suppressing the whiteness of the appearance, and improving smoothness. In addition, titanium dioxide particles coated with the aforementioned fatty acid may be used in combination with titanium dioxide particles coated with an aluminum-containing surface treatment agent.

[0010] The average particle size of titanium dioxide coated with the aluminum-containing surface treatment agent of component (A) is preferably 1 nm or more, more preferably 5 nm or more, preferably 100 nm or less, and even more preferably 80 nm or less, from the viewpoint of improving the UV protection effect of the cosmetic. Furthermore, from the viewpoint of suppressing stickiness when applying the cosmetic and improving smoothness, it is preferably 1 nm or more, more preferably 7 nm or more, even more preferably 8 nm or more, preferably 100 nm or less, more preferably 50 nm or less, and even more preferably 30 nm or less. Here, the average particle size of component (A) is obtained by measuring the maximum minor diameter of 300 particles in an image using a transmission electron microscope (TEM) at a magnification of 100,000, and calculating the average value. Here, the maximum minor diameter refers to the minor diameter with the largest diameter among the minor diameters perpendicular to the major diameter.

[0011] In the cosmetic composition of the present invention, from the viewpoint of obtaining excellent UV protection, no white residue after application, and a pleasant feel, it is preferable that the cosmetic composition contains 3% to 20% by mass of component (A). Furthermore, from the viewpoint of obtaining excellent UV protection and improving the stability of the cosmetic composition, the content of component (A) in the cosmetic composition of the present invention is preferably 4% by mass or more, more preferably 6% by mass or more, and even more preferably 8% by mass or more. From the viewpoint of no white residue after application, no squeaky feeling, and ease of removal, it is preferably 18% by mass or less, more preferably 15% by mass or less, and even more preferably 12% by mass or less. Specifically, the content of component (A) in the cosmetic composition is preferably 3% to 20% by mass or less, more preferably 4% to 18% by mass or less, even more preferably 6% to 15% by mass or less, and even more preferably 8% to 12% by mass or less. In the present invention, "ease of removal" means the ease with which the cosmetic composition of the present invention can be washed off the skin with a cleanser after application.

[0012] Component (B) used in the present invention is a water-soluble polymer having the constituent units of sulfonic acid. In this water-soluble polymer, it is preferable that the sulfonic acid constituent units have a sulfonic acid structure in their side chains, as it is preferable that the sulfonic acid groups exist in a free state. Furthermore, the main chain of this water-soluble polymer is preferably one or more selected from (meth)acrylic acid, (meth)acrylate, and (meth)acrylamide, or a cellulose derivative. Accordingly, component (B) is preferably a polymer or copolymer having a main chain of one or more selected from (meth)acrylic acid, (meth)acrylate, and (meth)acrylamide, or a cellulose derivative having a sulfonic acid structure in its side chains. Furthermore, the sulfonic acid structure is preferably present in the side chain of the (meth)acrylamide structural unit of the polymer or copolymer containing (meth)acrylamide. More preferably, the sulfonic acid structure is present as an aminoalkyl sulfonic acid structure in the side chain of the (meth)acrylamide structural unit of the polymer or copolymer containing (meth)acrylamide, and even more preferably as an aminoethyl sulfonic acid structure in the side chain of the (meth)acrylamide structural unit of the polymer or copolymer containing (meth)acrylamide. In addition, the copolymer containing (meth)acrylamide may be copolymerized from one or more selected from (meth)acrylic acid and (meth)acrylate. More specifically, examples include (sodium acrylate / sodium acryloyldimethyl taurate) copolymer (SIMULG EL EG), (hydroxyethyl acrylate / sodium acryloyldimethyl taurate) copolymer (SIMULG EL FL, SIMULG EL NS), etc. One or more (meth)acrylic acid polymers can be used with a sulfonic acid selected from these. Furthermore, stearoxy PG hydroxyethylcellulose sulfonate sodium (Poise 310; manufactured by Kao Corporation) can be cited as a water-soluble polymer having constituent units derived from sulfonic acid. Of these, using one or more selected from (sodium acrylate / sodium acryloyldimethyl taurate) copolymers is preferable because the composition is stable even in small amounts, and it also improves the effect of preventing creasing during application and the feel of use.

[0013] In the cosmetic composition of the present invention, from the viewpoint of improving the stability of the cosmetic composition and the ease of use of the container, the cosmetic composition preferably contains 0.02% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.1% by mass or more of component (B). Furthermore, from the viewpoint of improving ease of spreadability and freshness, it preferably contains 5% by mass or less, more preferably 3% by mass or less, and even more preferably 2% by mass or less. Specifically, the content of component (B) in the cosmetic composition is preferably 0.02% by mass or more and 5% by mass or less, more preferably 0.05% by mass or more and 3% by mass or less, and even more preferably 0.1% by mass or more and 2% by mass or less. Here, the content of component (B) refers to the content of the active ingredient contained in the product, and not the amount in a commercially available product. Furthermore, water-soluble polymers other than component (B) can be included in the cosmetic composition, as long as the effects of the present invention are not impaired.

[0014] The component (C1) used in the cosmetic composition of the present invention is an oily compound having one or more hydroxyl groups and two or more fatty acid groups having eight or more carbon atoms or two or more hydrocarbon chains having eight or more carbon atoms in its molecule. By including component (C1), the thickening effect and changes in appearance that occur when components (A) and (B) are used in combination are suppressed. This effect is thought to be due to component (C1) suppressing the interaction between components (A) and (B). The oily compound of component (C1) has one or more hydroxyl groups and two or more fatty acid groups having eight or more carbon atoms or two or more hydrocarbon chains having eight or more carbon atoms within its molecule. Here, the number of hydroxyl groups may be one or more, but two or more is more preferable. Furthermore, it has two or more fatty acid groups having eight or more carbon atoms or two or more hydrocarbon chains having eight or more carbon atoms, and the number of carbon atoms in the fatty acid group or hydrocarbon group is preferably 10 or more, more preferably 12 or more, even more preferably 14 or more, and even more preferably 16 or more. Furthermore, the number of carbon atoms in the fatty acid group or hydrocarbon group is preferably 24 or less. The fatty acid group or hydrocarbon group is preferably a chain-like fatty acid group or hydrocarbon group, and more preferably a straight-chain or branched-chain saturated or unsaturated fatty acid group or hydrocarbon group. As component (C1), oily compounds having one or more hydroxyl groups in the molecule and two or more fatty acid groups having 8 to 24 carbon atoms or two or more hydrocarbon groups having 8 to 24 carbon atoms are preferred, and oily compounds having one or more hydroxyl groups in the molecule and two or more linear fatty acid groups having 12 to 24 carbon atoms or two or more linear hydrocarbon groups having 12 to 24 carbon atoms are more preferred. Further, from the viewpoints of suppressing the thickening effect and change in appearance caused by the combined use of component (A) and component (B), and maintaining a high ultraviolet protection effect and a fresh feeling of use, component (C1) preferably has a relatively high hydrophobicity, more preferably has a clogP of 10 or more, and still more preferably has a clogP of 12 or more. Specific examples of said component (C1) include N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl hexadecanamide (clogP: 13.4), polyglyceryl-6 octacaprate (Saracos HG-8 manufactured by Nisshin OilliO Group Co., Ltd.), diisostearyl malate (Cosmol 222 manufactured by Nisshin OilliO Group Co., Ltd.), polyglyceryl diisostearate (Cosmol 42V manufactured by Nisshin OilliO Group Co., Ltd. (clogP: 15.7)), polyglyceryl triisostearate (Cosmol 43N manufactured by Nisshin OilliO Group Co., Ltd.), (isostearic acid / sebacic acid) ditrimethylolpropane oligoester (Saracos DT-318S manufactured by Nisshin OilliO Group Co., Ltd.), sorbitan distearate (Sansoft NO.63C-C manufactured by Taiyo Kagaku Co., Ltd. (clogP: 17.6)), dipentaerythrityl tripolyhydroxystearate (Saracos WO-6 manufactured by Nisshin OilliO Group Co., Ltd. (clogP: 35.7)), polyhydroxystearic acid (Saracos HS-6C manufactured by Nisshin OilliO Group Co., Ltd. (clogP: 34.2)), and the like. One or more of these components (C1) can be used. It is preferable that the composition contains at least one or more of N-(hexadecyloxyhydroxypropyl)-N-hydroxyethyl hexadecanamide (clogP: 13.4), polyglyceryl diisostearate (clogP: 15.7), sorbitan distearate (clogP: 17.6), dipentaerythrityl tripolyhydroxystearate (clogP: 35.7), and polyhydroxystearic acid (clogP: 34.2).

[0015] In the cosmetic of the present invention, from the viewpoints of suppressing the thickening effect and change in appearance caused by the combined use of component (A) and component (B), and maintaining a high ultraviolet protective effect and a fresh feeling of use, the content of component (C1) in the cosmetic is 0.6% by mass or more, preferably 0.7% by mass or more, more preferably 0.8% by mass or more, still more preferably 1% by mass or more, and even more preferably 1.5% by mass or more. Further, from the viewpoints of suppressing the thickening effect and change in appearance, and maintaining a high ultraviolet protective effect and a fresh feeling of use, the content is preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 10% by mass or less, and even more preferably 8% by mass or less. Specifically, the content is preferably 0.6% by mass or more and 20% by mass or less, more preferably 0.7% by mass or more and 15% by mass or less, still more preferably 0.8% by mass or more and 10% by mass or less, even more preferably 1% by mass or more and 8% by mass or less, and even more preferably 1.5% by mass or more and 8% by mass or less.

[0016] The cosmetic of the present invention may contain an oil agent (C2) other than the oily compound of component (C1). As the oil agent (C2) other than component (C1), any of an oil agent that is liquid at 25°C (C2a) and an oil agent that is solid at 25°C (C2b) can be used, but from the viewpoints of maintaining a high ultraviolet protective effect and a fresh feeling of use, it is more preferable to contain an oil agent that is liquid at 25°C (C2a).

[0017] In the context of liquid oils (C2a) at 25°C, "liquid at 25°C" means having fluidity at 25°C. Components (C2a) include liquid oils other than silicone oils and liquid silicone oils at 25°C. Examples of liquid oils other than silicone oils include hydrocarbon oils, ester oils, higher fatty acids, higher alcohols, or oil-soluble UV absorbers commonly used in sunscreen cosmetics. These may be of natural origin. Ester oils include naturally derived oils and fats and synthetic ester oils.

[0018] Examples of naturally derived oils and fats (natural oils and fats) include lavender oil, evening primrose oil, olive oil, avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, peach kernel oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, elm oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnamon oil, Japanese tili oil, jojoba oil, and wheat germ oil.

[0019] Examples of hydrocarbon oils include liquid paraffin, liquid isoparaffin, liquid ozokerite, squalane, pristane, and squalene.

[0020] Synthetic ester oils include isononyl isononanoate, isotridecyl isononanoate, neopentyl glycol dicaprate, neopentyl glycol diethylhexanoate, ethylhexyl palmitate, glyceryl tri-2-ethylhexylate, alkyl benzoate, di(caprylic / capric acid)propanediol, propanediol diisostearate, caprylic / capric acid)glyceryl, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, N-alkyl glycol monoisostearate, tri-2-ethylhexyl acid Limethylolpropane, Trimethylolpropane Triisostearate, Pentaerythritol Tetra-2-ethylhexylate, Trimethylolpropane Triisostearate, Cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, Glycerin Trimyristate, Glyceride Tri-2-heptylundecanoate, Methyl Castor Oil Fatty Acid Ester, Oleyl Oleate, Acetoglyceride, Palmitate Examples include 2-heptyl undecyl tinate, diisobutyl adipate, 2-octyldodecyl N-lauroyl-L-glutamate, di-2-heptyl undecyl adipate, ethyl laurate, di-2-ethylhexyl sebatate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebaticate, and 2-ethylhexyl succinate.

[0021] Examples of higher fatty acids include branched or unsaturated higher fatty acids with 12 to 20 carbon atoms, such as oleic acid, isostearic acid, linoleic acid, and linolenic acid.

[0022] Examples of higher alcohols include branched or unsaturated higher alcohols with 12 to 20 carbon atoms, such as oleyl alcohol, 2-decyltetradecinol, lanolin alcohol, dodecanol, isostearyl alcohol, and octyldodecanol.

[0023] Oil-soluble UV absorbers include salicylic acid derivatives such as homomenthyl salicylate, octyl salicylate, and triethanolamine salicylate; para-aminobenzoic acid derivatives such as para-aminobenzoic acid, ethyl dihydroxypropyl para-aminobenzoic acid, glyceryl para-aminobenzoic acid, octyldimethyl para-aminobenzoic acid, amyl para-dimethylaminobenzoate, and 2-ethylhexyl para-dimethylaminobenzoate; 4-(2-β-glucopyranosiloxy)propoxy-2-hydroxybenzophenone, dihydroxydimethoxybenzophenone, sodium dihydroxydimethoxybenzophenone disulfonate, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfate, 2,2'-dihydroxy-4-methoxybenzophenone, 2,4-dihydroxybenzophenone, 2,2'-4,4'-tetrahydroxybenzophenone, and 2,2'-dihydroxybenzophenone. Benzophenone derivatives such as C-4,4'-dimethoxybenzophenone and 2-hydroxy-4-N-octoxybenzophenone; 2-ethylhexyl paramethoxycinnamate (Ubinal MC80; manufactured by BASF), glyceryl mono-2-ethylhexanoate diparamethoxycinnamate, methyl 2,5-diisopropylcinnamate, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine (Ubinal T Cinnamic acid derivatives such as 150 (BASF), methylbis(trimethylsiloxy)silylisopentyl trimethoxycinnamate, isopropyl / diisopropyl cinnamic acid ester mixture, and diethanolamine p-methoxyhydrocinnamate; benzoylmethane derivatives such as 2-phenyl-benzimidazole-5-sulfate, 4-isopropyldibenzoylmethane, and 4-tert-butyl-4'-methoxydibenzoylmethane (Parasol 1789; DSM Nutrition Japan); octocrylene (Parasol 340; DSM Nutrition Japan), and 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidinepropionate (Soft Shade DH;Examples include 1-(3,4-dimethoxyphenyl)-4,4-dimethyl-1,3-pentanedione (manufactured by Ajinomoto Co., Inc.), cinoxate, methyl-O-aminobenzoate, 3-(4-methylbenzylidene)camphor, octyltriazone, diethylaminohydroxybenzoyl hexyl benzoate (Ubinal Aplus; manufactured by BASF), bis-ethylhexyloxyphenol methoxyphenyl triazine (Tinosorb S; manufactured by BASF), and methylenebisbenzotriazolyltetramethylbutylphenol (Tinosorb M; manufactured by BASF). One or more of these can be used.

[0024] Of these, 2-ethylhexyl paramethoxycinnamate (Ubinal MC80; manufactured by BASF), 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine (Ubinal T150; manufactured by BASF), 4-tert-butyl-4'-methoxydibenzoylmethane (Parasol 1789; manufactured by DSM Nutrition Japan), and octocrylene (Parasol 340; manufactured by DSM Nutrition Japan) are included. One or more selected from the following (manufactured by Nutrition Japan Co., Ltd.), 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate (Soft Shade DH; manufactured by Ajinomoto Co., Inc.), diethylamino hydroxybenzoyl hexyl benzoate (Ubinal Aplus; manufactured by BASF Corporation), bis-ethylhexyloxyphenol methoxyphenyl triazine (Tinosorb S; manufactured by BASF Corporation), and methylene bisbenzotriazolyltetramethylbutylphenol (Tinosorb M; manufactured by BASF Corporation) are preferred in terms of UV absorption effect, and a combination of two or more is more preferred.

[0025] Furthermore, among the oils other than silicone oils that are liquid at 25°C used in the present invention, ester oils or hydrocarbon oils are preferred from the viewpoint of dispersibility of component (A) and improvement of SPF. Specific examples of ester oils that are liquid at 25°C include octyldodecyl myristate, isocetyl myristate, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, propylene glycol isostearate, diethylhexyl sebacate, trimethylpropane tri-2-ethylhexanoate, di-2-ethylhexyl succinate, di(caprylic / capric acid)propylene glycol, 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, tri(caprylic / capric acid)glyceryl, trimethylolpropane trioctanoate, glyceryl tricaprylate, ethylene glycol dioctanoate, glyceryl dimyristate, diethylene glycol dilaurate, and tetra-2-ethyl Examples include pentaerythritol hexanoate, glyceryl monostearate diacetate, diisostearyl malate, alkyl benzoate (C12-C15), octyldodecyl lactate, oleyl lactate, propylene glycol dicaproate, diisopropyl sebacate, diethylene glycol dicaprate, neopentyl glycol dicaprate, neopentyl glycol di2-ethylhexanoate, coconut oil fatty acid glyceryl, glyceryl dilaurate, glyceryl sesquioleate, ethylene glycol monooleate, cetyl lactate, diethyl sebacate, methyl castor oil fatty acid, ethylene glycol palmitate, polyethylene glycol dilaurate, and tripropylene glycol dipivalate.

[0026] From a similar viewpoint, ester oils that are liquid at 25°C are preferably one or more selected from the group consisting of fatty acid monohydric alcohol esters, glycerin fatty acid esters, benzoic acid esters, and fatty acid triglycerides. More specifically, octyldodecyl myristate, isocetyl myristate, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, propylene glycol isostearate, diethylhexyl sebacate, trimethylpropane tri-2-ethylhexanoate, di-2-ethylhexyl succinate, di(caprylic / capric acid)propylene glycol, 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, tri(caprylic / capric acid)glyceryl, trimethylolpropane trioctanoate, glyceryl tricaprylate, ethylene glycol dioctanoate, glyceryl dimyristate, diethylene glycol dilaurate, pentaerythritol tetra-2-ethylhexanoate, monostearate diacetate Examples include glyceryl, diisostearyl malate, alkyl benzoate (C12-C15), i.e., alkyl benzoate (C12 or more and C15 or less), octyldodecyl lactate, oleyl lactate, propylene glycol dicaproate, diisopropyl sebacate, diethylene glycol dicaprate, neopentyl glycol dicaprate, neopentyl glycol di2-ethylhexanoate, coconut oil fatty acid glyceryl, glyceryl dilaurate, glyceryl sesquioleate, ethylene glycol monooleate, cetyl lactate, diethyl sebacate, methyl castor oil fatty acid, isopropyl palmitate, ethylene glycol palmitate, polyethylene glycol dilaurate, and tripropylene glycol dipivalate.

[0027] Specific examples of hydrocarbon oils that are liquid at 25°C include liquid paraffin, hydrogenated polyisobutene (liquid isoparaffin, heavy liquid isoparaffin), hydrogenated palm oil, hydrogenated castor oil, cycloparaffin, liquid ozokerite, squalene, squalane, pristane, α-olefin oligomer, polybutene, isohexadecane, isododecane, dodecane, and tetradodecane.

[0028] Component (C2a) preferably contains at least one oil other than a silicone oil that is liquid at 25°C. Preferred oils other than silicone oils that are liquid at 25°C include ester oils that are liquid at 25°C and hydrocarbon oils that are liquid at 25°C. By using these oils other than silicone oils that are liquid at 25°C, good dispersibility of component (A) can be obtained.

[0029] Furthermore, the non-stickiness can be further improved by using a silicone oil that is liquid at 25°C. Specific examples of silicone oils that are liquid at 25°C include, from a similar viewpoint, those with a viscosity of 200 mPa·s or less at 25°C are preferred, those with a viscosity of 1 to 100 mPa·s are more preferred, and those with a viscosity of 1 to 50 mPa·s are even more preferred. As for the silicone oil, from a similar viewpoint, dimethylpolysiloxane and dimethylcyclopolysiloxane are preferred, dimethylpolysiloxane and dimethylcyclopolysiloxane with a viscosity of 200 mPa·s or less at 25°C are more preferred, and dimethylpolysiloxane with a viscosity of 200 mPa·s or less at 25°C is even more preferred. Viscosity can be measured at 25°C using a B-type viscometer (TOKI SANGYO VISCOMETER TVB-10M, manufactured by Toki Sangyo Co., Ltd.), rotor 1, under conditions of 60 rpm and 1 minute.

[0030] In the present invention, the content of liquid oils other than silicone oil in component (C2a) is, for example, 0.1% by mass or more, preferably 0.5% by mass or more, and more preferably 1% by mass or more, relative to the total cosmetic composition, from the viewpoint of UV protection effect and stability. Furthermore, from the viewpoint of stability, it is, for example, 12% by mass or less, preferably 8% by mass or less, and more preferably 5% by mass or less, relative to the total cosmetic composition.

[0031] The total amount of components (C1) and (C2a) in the cosmetic composition of the present invention is preferably 10% by mass or more, more preferably 15% by mass or more, and even more preferably 20% by mass or more, from the viewpoint of suppressing thickening effect and changes in appearance, and from the viewpoint of maintaining a high UV protection effect and a fresh feel. Similarly, from the same viewpoint, it is preferably 55% by mass or less, more preferably 53% by mass or less, and even more preferably 50% by mass or less. Specifically, the total amount is preferably 10% by mass or more and 55% by mass or less, more preferably 15% by mass or more and 53% by mass or less, and even more preferably 20% by mass or more and 50% by mass or less.

[0032] Furthermore, from the viewpoint of suppressing stickiness, moisturizing, and smoothing the skin, the cosmetic composition of the present invention preferably contains, in addition to the oil, an oil that is solid at 25°C (C2b). Examples of oils that are solid at 25°C include linear saturated higher alcohols with 12 to 22 carbon atoms, monoglyceryl esters of 14 to 22 carbon atoms, monoalkyl glyceryl ethers of 14 to 22 carbon atoms, monosorbitan esters of 14 to 22 carbon atoms, waxes such as candelilla wax, carnauba wax, and bayberry wax; higher fatty acids with 12 to 22 carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, and 12-hydroxystearic acid; cholesterols; ester oils such as myristyl myristate, cholesteryl isostearate, behenyl behenylate, and glyceryl trimyristate; hydrocarbon oils such as petrolatum, ceresin, ozokerite, and microcrystalline wax, and ceramides. Among these, one or more selected from linear saturated higher alcohols having 12 to 22 carbon atoms, hydrocarbon oils, and ceramides are preferred, with alcohols having 12 to 22 carbon atoms being more preferred. Examples of linear saturated higher alcohols having 12 to 22 carbon atoms include myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, and behenyl alcohol. Of these, one or more selected from linear saturated higher alcohols having 16 to 18 carbon atoms are preferred.

[0033] The content of the solid-at-25°C oil agent (C2b) in the cosmetic composition of the present invention is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, even more preferably 0.3% by mass or more, and also preferably 5% by mass or less, more preferably 3% by mass or less, and even more preferably 2% by mass or less, relative to the total amount of the cosmetic composition, from the viewpoint of improving the stability of the cosmetic composition and suppressing stickiness, moisturizing, and smoothing the skin. The content of the specific component (E) is preferably 0.1 to 5% by mass, more preferably 0.2 to 3% by mass, and even more preferably 0.3 to 2% by mass.

[0034] In the present invention, the mass ratio (C1) / ((C1)+(C2a)) of component (C1) to the total amount of component (C1) and component (C2a) is preferably 0.02 or higher, more preferably 0.025 or higher, even more preferably 0.03 or higher, even more preferably 0.04 or higher, preferably 1 or lower, more preferably 0.6 or lower, even more preferably 0.4 or lower, even more preferably 0.3 or lower, and especially preferably 0.2 or lower. Furthermore, the mass ratio (C1) / ((C1)+(C2a)) of component (C1) to the total amount of component (C1) and component (C2a) is preferably 0.02 to 1, more preferably 0.02 to 0.6, even more preferably 0.025 to 0.4, even more preferably 0.03 to 0.3, and especially preferably 0.04 to 0.2.

[0035] In the present invention, the mass ratio of the total amount of components (A) and (B) to component (C1), ((A)+(B)) / (C1), is preferably 0.3 or higher, more preferably 0.5 or higher, even more preferably 1 or higher, even more preferably 2 or higher, preferably 25 or lower, even more preferably 20 or lower, even more preferably 15 or lower, and even more preferably 11 or lower, from the viewpoint of suppressing thickening and changes in appearance, and maintaining a high UV protection effect and a fresh feel.

[0036] The cosmetic composition of the present invention is an oil-in-water emulsion composition, and in addition to the above components, it contains a surfactant (D) and water. As the surfactant (D), nonionic surfactants are preferred, and examples include polyglycerin fatty acid esters, propylene glycol fatty acid esters, pentaerythritol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan 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. Among these, one or more selected from polyoxyethylene sorbitan fatty acid esters, sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene hydrogenated castor oil are preferred, and one or more selected from sorbitan fatty acid esters and polyoxyethylene sorbitan fatty acid esters are more preferred.

[0037] In the cosmetic composition of the present invention, from the viewpoint of improving the emulsification stability of the cosmetic composition, the cosmetic composition preferably contains 0.01% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1.0% by mass or more of surfactant (D). Furthermore, from the viewpoint of improving lightness during application and non-stickiness after application, it preferably contains 5% by mass or less, more preferably 3% by mass or less, and even more preferably 2% by mass or less. Specifically, the surfactant content in the cosmetic composition is preferably 0.01% by mass or more and 5% by mass or less, more preferably 0.5% by mass or more and 3% by mass or less, and even more preferably 1.0% by mass or more and 2% by mass or less.

[0038] Furthermore, from the viewpoint of UV protection effect, freshness, and stability of the cosmetic composition of the present invention, it is preferable that the cosmetic composition contains dextrin fatty acid ester (E) in addition to the above-mentioned components. The dextrin fatty acid ester used in the present invention is an ester of a fatty acid and dextrin, wherein the number of carbon atoms of the fatty acid is preferably 8 to 24, more preferably 14 to 18, the fatty acid is a linear or branched saturated or unsaturated fatty acid, and the average degree of polymerization of the dextrin is preferably 10 to 50, more preferably 20 to 30. Specific examples include dextrin palmitate, dextrin palmitate / 2-ethylhexanoate, dextrin stearate, dextrin palmitate / stearate, dextrin oleate, dextrin isopalmitate, dextrin isostearate, etc., and one or more of these can be used. Commercially available products include dextrin palmitate (Leopal KL2, Leopal KS2, Leopal TL2), dextrin palmitate / 2-ethylhexanoate (Leopal TT2), and dextrin myristate (Leopal MKL2), all manufactured by Chiba Flour Milling Co., Ltd.

[0039] The content of dextrin fatty acid ester (E) in cosmetics is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, preferably 5% by mass or less, and preferably 2% by mass or less, from the viewpoint of improving UV protection effect, freshness, and cosmetic stability. Specifically, the content of dextrin fatty acid ester is preferably 0.1% by mass or more and 5% by mass or less, and more preferably 0.3% by mass or more and 2% by mass or less.

[0040] The water content in the cosmetic composition used in the present invention is preferably 30% by mass or more, more preferably 35% by mass or more, even more preferably 40% by mass or more, and similarly, preferably 80% by mass or less, more preferably 70% by mass or less, and even more preferably 65% ​​by mass or less. Specifically, 30% by mass or more and 80% by mass or less is preferred, 35% by mass or more and 70% by mass or less is preferred, and even more preferably 40% by mass or more and 65% by mass or less.

[0041] In addition to the components mentioned above, the cosmetic composition of the present invention may contain ultraviolet scattering agents other than titanium dioxide, ultraviolet absorbing agents, fragrances, moisturizers, beauty ingredients, medicinal ingredients, thickeners, oil gelling agents, bactericides, pH adjusters, antioxidants, preservatives, alcohols having 1 to 5 carbon atoms, etc. The content of ultraviolet absorbing agents is preferably 10% by mass or less, more preferably 6% by mass or less, and even more preferably 3% by mass or less in the cosmetic composition.

[0042] Specific examples of moisturizers include glycerin, 1,3-butylene glycol, dipropylene glycol, propanediol, propylene glycol, hyaluronic acid, and their salts. Specific examples of cosmetic or medicinal ingredients include extracts such as sunflower oil, yuzu extract, witch hazel extract, lemon extract, chamomile extract, cypress extract, rosemary extract, balloon flower extract, orange extract, grapefruit extract, and ginger extract. Specific examples of pH adjusters include bases such as sodium hydroxide, potassium hydroxide, ammonium chloride, and triethanolamine; and acids such as organic acids. A specific example of a preservative is phenoxyethanol.

[0043] Furthermore, the product may contain powders other than those mentioned above, specifically including talc, starch, and resin powders. Specific examples of resin powders include silicone resin powder and a lauryl methacrylate / ethylene glycol dimethacrylate / sodium methacrylate copolymer powder, and more specifically, the resin powder described in Japanese Patent Publication No. 2006-225311. The product may also contain chelating agents such as disodium edetate.

[0044] The oil-in-water emulsion cosmetic of the present invention can be manufactured according to a conventional method. Specifically, at a predetermined temperature of about 25°C, component (B) and water are mixed to prepare the aqueous phase. Meanwhile, at a predetermined temperature of about 80°C to 90°C, component (C1) and other oil phase components are added and component (A) is mixed to prepare the oil phase. Then, the oil phase and other components are added to the aqueous phase and cooled to about room temperature while stirring to obtain the oil-in-water cosmetic of the present invention.

[0045] The oil-in-water emulsion cosmetic of the present invention is particularly useful as a sunscreen cosmetic because it has a high UV protection effect, a good feel, does not thicken, and has a good appearance. The forms of the cosmetic obtained by the present invention include makeup cosmetics with sunscreen properties such as makeup bases, emulsion foundations, and eyeshadows; and sunscreen cosmetics such as sunscreen creams. Furthermore, the dosage form can be, for example, lotions, creams, etc.

[0046] In the present invention, by using a combination of the above components (A) to (C1), an oil-in-water emulsion cosmetic is obtained that maintains a high UV protection effect and a good feel, does not thicken, and has a good appearance. The cosmetic composition of the present invention is applicable to the skin, especially the skin excluding the scalp, preferably the face, body, hands and feet, etc.

[0047] With regard to the embodiments described above, the present invention further discloses the following compositions.

[0048] <1> The following components (A), (B), and (C1): (A) Titanium oxide coated with a surface treatment agent containing aluminum, (B) A water-soluble polymer having a constituent unit of sulfonic acid, (C1) Oily compound having one or more hydroxyl groups and two or more fatty acid groups having 8 or more carbon atoms or two or more hydrocarbon chains having 8 or more carbon atoms in the molecule: 0.6% by mass or more An oil-in-water emulsion cosmetic containing [specific ingredient].

[0049] <2> Component (A) is preferably alumina fatty acid treated titanium dioxide particles, more preferably alumina carbon 14-22 fatty acid treated titanium dioxide particles, and even more preferably one or two selected from alumina stearate treated titanium dioxide particles and alumina isostearate treated titanium dioxide particles. <1> The oil-in-water emulsion cosmetic described above. <3> The average particle size of component (A) is preferably 1 nm or more, more preferably 5 nm or more, preferably 100 nm or less, and even more preferably 80 nm or less. <1> or <2> The oil-in-water emulsion cosmetic described above. <4> The content of component (A) is preferably 3% by mass or more and 20% by mass or less, more preferably 4% by mass or more and 18% by mass or less, even more preferably 6% by mass or more and 15% by mass or less, and even more preferably 8% by mass or more and 12% by mass or less. <1> ~ <3> An oil-in-water emulsion cosmetic as described in any of the following. <5> Component (B) is preferably a water-soluble polymer having a sulfonic acid group in the side chain of the (meth)acrylamide structural unit of a polymer or copolymer containing (meth)acrylamide, more preferably a water-soluble polymer having an aminoalkyl sulfonic acid structure in the side chain of the (meth)acrylamide structural unit of a polymer or copolymer containing (meth)acrylamide, and even more preferably one or two selected from (sodium acrylate / sodium acryloyldimethyl taurate) copolymer and (hydroxyethyl acrylate / sodium acryloyldimethyl taurate) copolymer. <1> ~ <4> An oil-in-water emulsion cosmetic as described in any of the following. <6> The content of component (B) is preferably 0.02% by mass or more and 5% by mass or less, more preferably 0.05% by mass or more and 3% by mass or less, and even more preferably 0.1% by mass or more and 2% by mass or less. <1> ~ <5> An oil-in-water emulsion cosmetic as described in any of the following. <7> Component (C1) is preferably an oily compound with a clogP of 10 or higher, having one or more hydroxyl groups and two or more fatty acid groups having 8 to 24 carbon atoms or two or more hydrocarbon groups having 8 to 24 carbon atoms in the molecule. More preferably, one or more selected from N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide, polyglyceryl-6 octacaprate, diisostearyl malate, polyglyceryl diisostearate, polyglyceryl triisostearate, (isostearate / sebacate) ditrimethylolpropane oligoester, sorbitan distearate, dipentaerythrityl tripolyhydroxystearate, and polyhydroxystearic acid. <1> ~ <6> An oil-in-water emulsion cosmetic as described in any of the following. <8> The content of component (C1) is preferably 0.6% by mass or more and 20% by mass or less, more preferably 0.7% by mass or more and 15% by mass or less, even more preferably 0.8% by mass or more and 10% by mass or less, even more preferably 1% by mass or more and 8% by mass or less, and even more preferably 1.5% by mass or more and 8% by mass or less. <1> ~ <7> An oil-in-water emulsion cosmetic as described in any of the following. <9> Furthermore, it contains an oily agent (C2) other than component (C1). <1> ~ <8> An oil-in-water emulsion cosmetic as described in any of the following. <10> The oil (C2) is one or more oils selected from an oil that is liquid at 25°C (C2a) and an oil that is solid at 25°C (C2b), and it is preferable that it contains an oil that is liquid at 25°C (C2a). <9> The oil-in-water emulsion cosmetic described above. <11> The liquid oil at 25°C (C2a) is preferably one or more selected from liquid oils at 25°C other than silicone oil and liquid silicone oil at 25°C, and more preferably one or more selected from hydrocarbon oils, ester oils, higher fatty acids, higher alcohols and oil-soluble ultraviolet absorbers. <9> or <10> The oil-in-water emulsion cosmetic described above. <12> The total amount of component (C1) and component (C2a) is preferably 10% by mass or more and 55% by mass or less, more preferably 15% by mass or more and 53% by mass or less, and even more preferably 20% by mass or more and 50% by mass or less. <10> or <11> The oil-in-water emulsion cosmetic described above. <13> The mass ratio (C1) / ((C1)+(C2a)) of component (C1) to the total amount of component (C1) and component (C2a) is preferably 0.02 to 1, more preferably 0.02 to 0.6, even more preferably 0.025 to 0.4, even more preferably 0.03 to 0.3, and especially preferably 0.04 to 0.2. <1> ~ <12> An oil-in-water emulsion cosmetic as described in any of the following. <14> The mass ratio of the total amount of components (A) and (B) to component (C1), ((A)+(B)) / (C1), is preferably 0.3 to 25, more preferably 0.5 to 20, even more preferably 1 to 15, and still more preferably 2 to 11. <1> ~ <13> An oil-in-water emulsion cosmetic as described in any of the following. <15> Furthermore, it contains a surfactant (D), preferably a nonionic surfactant. <1> ~ <14> An oil-in-water emulsion cosmetic as described in any of the following. <16> The content of component (D) is preferably 0.01% by mass or more and 5% by mass or less, more preferably 0.5% by mass or more and 3% by mass or less, and even more preferably 1.0% by mass or more and 2% by mass or less. <15> The oil-in-water emulsion cosmetic described above. <17> Furthermore, it contains dextrin fatty acid ester (E). <1> ~ <16> An oil-in-water emulsion cosmetic as described in any of the following. <18> The content of dextrin fatty acid ester (E) is preferably 0.1% by mass or more and 5% by mass or less, and more preferably 0.3% by mass or more and 2% by mass or less. <17> The oil-in-water emulsion cosmetic described above. <19> The water content is preferably 30% to 80% by mass, more preferably 35% to 70% by mass, and even more preferably 40% to 65% by mass. <1> ~ <18> An oil-in-water emulsion cosmetic as described in any of the following. <20> It is a sunscreen cosmetic. <1> ~ <19> An oil-in-water emulsion cosmetic as described in any of the following. [Examples]

[0050] The present invention will now be described in more detail with reference to examples.

[0051] (Examples 1-27 and Comparative Examples 1-2) Oil-in-water emulsion cosmetics with the compositions shown in Tables 1 and 2 were prepared, and their UV protection effect, fluidity, properties, and surface smoothness were evaluated. The results are also shown in Tables 1 and 2.

[0052] (Manufacturing method) At a temperature of 25°C, component (B) was dispersed in a mixing tank containing purified water while stirring with a disperser to prepare the aqueous phase. Meanwhile, at a temperature of approximately 90°C, components (C), (D), (E), and (F) were heated and stirred, and then component (A) was added and dispersed with a disperser to prepare the oil phase. Subsequently, the oil phase was added to the aqueous phase and stirred, and the remaining components were added to obtain an oil-in-water emulsion cosmetic.

[0053] (Evaluation method) (1) UV protection effect (SPF value) On a PMMA plate, add 2 mg / cm³ of cosmetic material. 2 The sample was applied uniformly for 1 minute and dried in a cool, dark place for 15 minutes. After drying, the transmittance (%) of the absorption spectra (wavelength 350 nm) at a total of 9 points on a square PMMA plate—the midpoint, each vertex, and the midpoint of the sides connecting each vertex—was measured using an SPF analyzer (SPF 290S plus, Optometricus USA, Inc.) and the average of the 9 points was calculated. The results show the SPF value (-) calculated from the transmittance (%). The SPF values ​​are shown in the table according to the following criteria. SPF 30 or older 4 22.5 or higher and less than 30: 3 15 or more and less than 22.5 2 Under 15 1

[0054] (2) Fluidity of cosmetics 40g of cosmetic product was placed in a 50g glass bottle and stored at 50°C for one week. After that, the cosmetic product was tilted in the glass bottle at 25°C and observed visually to see if it was still fluid and not solidifying. 4: Liquid 3: Somewhat liquid 2: Not very liquid 1: Not liquid at all

[0055] (3) Properties of cosmetics 40g of cosmetic product was placed in a 50g glass bottle and stored at 50°C for one week. Afterwards, it was observed with the naked eye at 25°C to check for separation and whether any oil seepage was observed. 4: Not recognized 3: Not very recognized 2: Somewhat recognized 1: Clearly recognized

[0056] (4) Smoothness of the surface of the cosmetic product 40g of cosmetic product was placed in a 50g glass bottle and stored at 50°C for one week. Afterwards, it was observed with the naked eye at 25°C to check if the appearance was not crumbly and if it had a glossy finish. 4: Shiny 3: Slightly shiny 2: Not shiny 1: Not shiny and rough

[0057] [Table 1]

[0058] [Table 2]

[0059] *1: Teika Corporation MT-100TV *2: MT-05 manufactured by Teika Co., Ltd. *3: Teika Co., Ltd. MT-10EX *4: SEPPIC's SIMULGEL EG (containing sodium acrylate / sodium acryloyldimethyl taurate copolymer 37.5%, water 30.0%, isohexadecane 22.5%, polysorbate 80 7.5%, and sorbitan oleate 2.5%) *5: SIMULGEL FL (Hydroxyethyl Acrylate / Sodium Acryloyldimethyl Taurate Copolymer 37.5%, Isohexadecane) manufactured by SEPPIC. (25.5%, Polysorbate 60 5.5%, Sorbitan Isostearate 2% or less, Water (residual content)) *6: Sphingolipid E ​​manufactured by Kao Corporation *7: Saracos WO-6 manufactured by Nisshin Oillio Group Co., Ltd. *8: Saracos S-6C manufactured by Nisshin Oillio Group Co., Ltd. *9: Cosmoll 42V manufactured by Nisshin Oillio Group Co., Ltd. *10: Sunsoft No. 63C-C manufactured by Taiyo Kagaku Co., Ltd. *11: Saracos HG-8 manufactured by Nisshin Oillio Group Co., Ltd. *12: Cosmoll 222, manufactured by Nisshin Oillio Group Co., Ltd. *13: Cosmoll 43N manufactured by Nisshin Oillio Group Co., Ltd. *14: Saracos 5408, manufactured by Nisshin Oillio Group. *15: Saracos 913 manufactured by Nisshin Oillio Group Co., Ltd. *16: Saracos 99 manufactured by Nisshin Oillio Group Co., Ltd. *17: Nisshin Oillio Group Co., Ltd. Estemol N-01 *18: Pearlream EX manufactured by NOF Corporation *19: NIKKOL Sugar Squalane, manufactured by Japan Surfactant Industry Co., Ltd. *20: Silicone KF-96A-1CS(-G) manufactured by Shin-Etsu Chemical Co., Ltd. *21: Silicone KF-96A-6CS(-G) manufactured by Shin-Etsu Chemical Co., Ltd. *22: Kao Corporation Leodor TW-S120V (HLB 14.9) *23: Leopard KL2 manufactured by Chiba Flour Milling Co., Ltd. *24: Pemulen TR-2 POLYMER manufactured by Lubizol Advanced Materials. *25: Liquid potassium compound (48%) manufactured by Asahi Glass Co., Ltd.

[0060] Tables 1 and 2 show that the oil-in-water emulsion cosmetic composition of the present invention maintains a high UV protection effect and a good feel, does not increase viscosity, and has a good appearance.

Claims

1. The following components (A), (B), (C1), and (E): (A) Titanium oxide coated with a surface treatment agent containing aluminum, (B) A water-soluble polymer having a constituent unit of sulfonic acid, (C1) N-(hexadecyloxyhydroxypropyl)-N-hydroxyethylhexadecanamide, polyglyceryl-6 octacaprate, diisostearyl malate, polyglyceryl diisostearate, polyglyceryl triisostearate, (isostearate / sebacate) ditrimethylolpropane oligoester, sorbitan distearate, dipentaerythrityl tripolyhydroxystearate, polyhydroxystearic acid, and pentaerythrityl tetraethylhexanoate, an oily compound with a clogP of 13.4 or higher, selected from these, 0.6% to 20% by mass. (E) Dextrin fatty acid ester An oil-in-water emulsion cosmetic containing [specific ingredient].

2. The oil-in-water emulsion cosmetic composition according to claim 1, wherein the content of component (A) is 3% by mass or more and 20% by mass or less.

3. The oil-in-water emulsion cosmetic composition according to claim 1 or 2, wherein component (B) is a water-soluble polymer having a sulfonic acid group in the side chain of the (meth)acrylamide constituent unit of a polymer or copolymer containing (meth)acrylamide.

4. The oil-in-water emulsion cosmetic composition according to any one of claims 1 to 3, wherein component (B) is a water-soluble polymer having an aminoalkyl sulfonic acid structure in the side chain of the (meth)acrylamide constituent unit of a polymer or copolymer containing (meth)acrylamide.

5. An oil-in-water emulsion cosmetic composition according to any one of claims 1 to 4, wherein the content of component (B) is 0.02% by mass or more and 5% by mass or less.

6. Furthermore, the oil-in-water emulsion cosmetic composition according to any one of claims 1 to 5, further comprising an oil agent (C2a) other than component (C1) that is liquid at 25°C.

7. The oil-in-water emulsion cosmetic composition according to claim 6, wherein the total amount of component (C1) and component (C2a) is 10% by mass or more and 55% by mass or less.

8. The oil-in-water emulsion cosmetic composition according to claim 6 or 7, wherein the mass ratio of component (C1) to the total amount of component (C1) and component (C2a) (C1) / (C1 + C2a) is 0.02 to 1.

9. An oil-in-water emulsion cosmetic composition according to any one of claims 1 to 8, wherein the mass ratio of the total amount of components (A) and (B) to component (C1) ((A) + (B)) / (C1) is 0.3 to 25.

10. Furthermore, the oil-in-water emulsion cosmetic composition according to any one of claims 1 to 9, further containing a surfactant (D).

11. An oil-in-water emulsion cosmetic according to any one of claims 1 to 10, which is a sunscreen cosmetic.

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