JP2022161428A - sunscreen cosmetics - Google Patents

Abstract

To provide sunscreen cosmetics that do not cause sticky skin after its application, and even after a long time from the application, can protect the skin from dryness, the cosmetics also having high storage stability.SOLUTION: Sunscreen cosmetics contain (A) particulate metal oxides, (B) hydrophilic film-forming polymers, and (C) niacin amide.SELECTED DRAWING: None

Description

The present invention relates to sunscreen cosmetics.

Various UV care cosmetics have been developed to suppress skin damage caused by ultraviolet rays. Sunscreen cosmetics (sunscreens, sun protectors), which are one type of UV care cosmetics, contain UV absorbers, UV scattering agents, etc. to protect the skin from the harmful effects of UV rays. (Non-Patent Document 1). Fine particles of metal oxides are widely used as UV scattering agents, and it has been proposed that emulsifier-type particles can be dispersed well in an aqueous phase to enhance the UV protection effect (Patent Document 1).
In recent years, in the field of cosmetics, niacinamide (also known as nicotinic acid amide) has been attracting attention as an ingredient that improves skin conditions that deteriorate with age, such as wrinkles and firmness. There is an example (Patent Document 2).

JP 2020-070247 A Japanese Patent Publication No. 2003-502435

"Cosmetics Encyclopedia", edited by the Society of Cosmetic Engineers of Japan, 2004, published by Maruzen Co., Ltd., pp. 495-496

Cosmetics containing fine-particle metal oxides may feel dry over time after being applied to the skin. In addition, cosmetics containing niacinamide may cause stickiness after application, or may impair the stability of cosmetics when used in combination with fine metal oxide particles.
In view of such circumstances, an object of the present invention is to provide a sunscreen cosmetic that does not make the skin sticky after application, does not give a feeling of dryness even after a long period of time after application, and has excellent storage stability. .

As a result of intensive research conducted by the present inventors to solve the above problems, the present inventors have come to the conclusion that the above problems can be solved in cosmetics containing fine metal oxide particles and niacinamide by using a hydrophilic film-forming polymer. As a result, the present invention has been completed.

That is, the present invention is as follows.
[1] A sunscreen cosmetic containing the following component (A), component (B) and component (C).
(A) Fine particle metal oxide (B) Hydrophilic film-forming polymer (C) Niacinamide [2] The cosmetic composition according to [1], wherein the weight average molecular weight of component (B) is 2,000 to 20,000.
[3] The cosmetic according to [1] or [2], wherein component (B) is an acrylic polymer. [4] The cosmetic according to any one of [1] to [3], wherein the component (A) is microparticles of titanium oxide.
[5] The cosmetic according to any one of [1] to [4], wherein the content of component (C) is 1 to 10% by weight of the total cosmetic.
[6] The cosmetic according to any one of [1] to [5], which is an oil-in-water emulsifier type.
[7] Any one of [1] to [6], which contains component (A) and component (B) as an aqueous dispersion in which component (A) is dispersed in an aqueous medium containing component (B). Cosmetics as described.
[8] [1] to [6], including a step of mixing component (A) and component (B) to prepare an aqueous dispersion, and a step of mixing the aqueous dispersion and component (C) A method for producing a cosmetic according to any one of the above.

The sunscreen cosmetic of the present invention can be used with a good touch without feeling sticky on the skin after application. In addition, even after a long time has passed since the application, the skin does not feel dry easily. Furthermore, the cosmetic of the present invention is also excellent in stability over time and temperature.

[1] The cosmetic of the present invention contains (A) fine metal oxide particles, (B) a hydrophilic film-forming polymer, and (C) niacinamide.

(A) Fine Particle Metal Oxide The fine particle metal oxide in the present invention refers to a metal oxide having an average primary particle diameter in the range of 10 to 80 nm when observed with an electron microscope. More specifically, fine particles of titanium dioxide, fine particles of zinc oxide, fine particles of zirconium oxide, fine particles of cerium oxide, and the like can be preferably exemplified. Among these fine-particle metal oxides, fine-particle titanium dioxide and fine-particle zinc oxide are more preferable, and titanium oxide is particularly preferable for the fine-particles, since they are excellent in ultraviolet scattering effect.
The surfaces of these fine metal oxides may be coated with inorganic compounds such as silica and alumina, or organic compounds such as fatty acid metal soaps and silicones.

The fine-particle metal oxide in the present invention can be produced by a conventional method such as thermal decomposition of a salt of the corresponding metal in the gas phase. . Commercially available microparticle titanium dioxide includes "MTY-110M3S", "MTY-02", "MT-100TV", "MT-500HSA", "MT-100T", "MT-01", and "MT-10EX". , "MT-05", "MT-100Z", "MT-150EX", "MT-100AQ", "MT-100WP", "MT-100SA", "MT-500B", "MT-500SA", " MT-600B", "MT-500SAS" (manufactured by Tayca Corporation), "Tipaque CR-50", "Tipaque TTO-M-1", "Tipaque TTO-V4" (above, Ishihara Sangyo Co., Ltd. ), “ST-455”, “STT-65C-S”, “STT-30EHS” (manufactured by Titan Kogyo Co., Ltd.), “Bayer Titanium R-KB-1” (manufactured by Bayer), etc. be done.

In addition, commercially available fine zinc oxide includes “MZ-300”, “MZY-303S”, “MZ-306X”, “MZ-500”, “MZY-505S”, “MZ-506X”, “MZY- 510M3S", "MZ-510HPSX", "WSX-MZ-700" (manufactured by Tayca Corporation), "SANT-UFZO-450", "SANT-UFZO-500" (manufactured by Miyoshi Kasei Co., Ltd. ), “FZO-50” (manufactured by Ishihara Sangyo Co., Ltd.), “Maxlite ZS-032” and “Maxlite ZS-032D” (manufactured by Showa Denko KK).

The content of the fine particle metal oxide in the cosmetic of the present invention is preferably 0.01 to 20% by weight, more preferably 0.1 to 10% by weight, and still more preferably 0.1% by weight of the entire cosmetic. to 8% by weight, particularly preferably 0.5 to 5% by weight.
By using it in such a range, it becomes easier to obtain a sufficient protective effect against ultraviolet rays, and dry feeling on the skin is less likely to occur even after a long period of time after application.

(B) Hydrophilic Film-Forming Polymer The hydrophilic film-forming polymer in the present invention is not particularly limited as long as it is commonly used in cosmetics. By blending such components, (A) the fine metal oxide particles can be uniformly dispersed in the water phase in the cosmetic.
Specific examples of hydrophilic film-forming polymers include vinyl polymers that may have any substituent (e.g., polyvinyl alcohol, polyvinyl chloride, polyvinyl methyl ether, polyvinyl acetate, polyvinylpyrrolidone, vinyl acetate/vinylpyrrolidone copolymer, carboxyvinyl polymer, etc.), acrylic polymers (e.g., polyacrylic acid or its salts, polyethyl acrylate, polyacrylamide, alkyl acrylate copolymers, etc.), and the like. . Among these, acrylic acid-based polymers, which are polymers/copolymers of acrylic acid monomers, are more preferred, polyacrylic acid or salts thereof are more preferred, and sodium polyacrylate is particularly preferred.

The hydrophilic film-forming polymer preferably has a polymerization average molecular weight of 2,000 to 20,000, more preferably 3,000 to 10,000, and still more preferably 4,000 to 8,000.

The content of the hydrophilic film-forming polymer in the cosmetic of the present invention is preferably 0.001 to 20% by weight, more preferably 0.001 to 20% by weight, and still more preferably 0% by weight of the entire cosmetic. 0.01 to 10.0% by weight, particularly preferably 0.05 to 1% by weight.
By using it in such a range, the fine particle metal oxide can be easily dispersed uniformly in the cosmetic, so that a sufficient UV protection effect can be easily obtained and the stability of the cosmetic can be improved. The dryness of the skin is less likely to occur even after a long period of time after application.

The cosmetic of the present invention contains (C) niacinamide.
Niacinamide gives a moist feeling to the skin to which the sunscreen cosmetic is applied and suppresses dryness. It also has the effect of imparting firmness to the skin to which the cosmetic has been applied. A feeling of firmness means a touch that the skin has elasticity and pushes back against stress.

The content of niacinamide in the cosmetic of the present invention is preferably 1 to 10% by weight, more preferably 2 to 6% by weight, still more preferably 4 to 5.4% by weight, relative to the total amount of the cosmetic. Especially preferred is 2.5 to 5.4% by weight.
By using it in such a range, the skin feels less sticky when applied, and the skin feels less dry even after a long period of time after application. Furthermore, after applying the cosmetic, the skin is more likely to have firmness.

The formulation of the cosmetic of the present invention is not particularly limited, such as an aqueous cosmetic or an emulsified cosmetic, but an oil-in-water emulsion type is particularly preferred. The oil-in-water emulsifier type is not particularly limited as long as the outermost phase is an aqueous phase, and in addition to the O/W type, it may be a W/O/W type or (O ₁ +O ₂ )/W type. .

When the cosmetic of the present invention is an emulsifier, it contains an aqueous phase component and an oil phase component.
As an aqueous phase component, the cosmetic of the present invention contains water. In addition to water, the water phase component may be a component that dissolves in water at 25 to 90°C. Generally, (B) a hydrophilic film-forming polymer, (C) niacinamide, and a surfactant are also included in the aqueous phase components. The oil phase component is not limited to an oil agent, and generally includes powders and the like as long as it is suspended in water at 25 to 90° C. and allowed to stand still for 1 hour to phase-separate from the water. However, (A) the fine metal oxide particles are located in the aqueous phase in the present invention due to the action of (B) the hydrophilic film-forming polymer.
When the cosmetic of the present invention is an emulsifier, the weight ratio of the water phase component to the oil phase component is not particularly limited, but is preferably 99:1 to 50:50, more preferably 95:5 to 95:5. It is 70:40.

The sunscreen cosmetic of the present invention can be used with a good feel without feeling sticky on the skin after application. In addition, even after a long time has passed since the application, the skin does not feel dry easily. In addition, it can be expected that the skin after application will be given a feeling of firmness. Furthermore, the cosmetic of the present invention is also excellent in storage stability over time and temperature.

The cosmetic of the present invention can be produced according to a conventional method.
Preferably, component (A) and component (B) are prepared to be contained in the cosmetic as an aqueous dispersion in which component (A) is dispersed in an aqueous medium containing component (B). Specifically, a manufacturing method including a step of mixing component (A) and component (B) to prepare an aqueous dispersion, and a step of mixing the aqueous dispersion and component (C) is preferred. Here, as long as the aqueous dispersion containing the component (A) and the component (B) is prepared in advance, it is possible to mix other cosmetic ingredients before and after the step of further mixing the component (C). , or simultaneously.
By containing component (A) and component (B) in the cosmetic as an aqueous dispersion thereof, component (B) can be arranged in the aqueous phase in a manner surrounding component (A). ) are more uniformly dispersed and blended in the cosmetic, the UV protection effect is further enhanced, and the skin does not easily feel dry even after a long period of time after application.

The cosmetic of the present invention may optionally contain other components commonly used in cosmetics as long as the effects of the present invention are not impaired. Examples of such optional components include oils, powders other than (A), alcohols, ethers, humectants, surfactants, sequestering agents, pearlescent agents, amino acids, organic amines, polymer emulsions, pH adjusters, Examples include vitamins, antioxidants, preservatives, water-soluble polymers, fragrances, and various active ingredients.

Other oils include silicone oils, polar oils, natural oils, hydrocarbons, and the like.

Examples of silicone oils include dimethylpolysiloxane (dimethicone), cyclopentasiloxane, decamethylcyclopentasiloxane, caprylyl methicone, trimethylsiloxysilicate, (dimethicone/vinyl dimethicone) crosspolymer, (dimethicone/phenyl vinyl dimethicone) crosspolymer, etc. is mentioned.

Polar oils include synthetic ester oils such as isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, and lactic acid. Cetyl, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexylate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl dicaprate Glycol, diisostearyl malate, glyceryl di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexylate, trimethylolpropane triisostearate, pentaneerythritol tetra-2-ethylhexylate, tri-2-ethylhexanoic acid Glyceryl, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, tri-2-heptylundecanoic acid glyceride, castor oil fatty acid methyl ester, oleic oil, cetostearyl alcohol , acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid 2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-sebacate ethylhexyl, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, isononyl isononanoate, ethyl acetate, butyl acetate, amyl acetate, triethyl citrate, octyl methoxycinnamate, 2-ethylhexyl para-methoxycinnamate, hexyl diethylaminohydroxybenzoylbenzoate and the like.

Natural oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, and linseed oil. Flower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, sinagiri oil, Japanese paulownia oil, jojoba oil, germ oil, sunflower oil, triglycerin, glyceryl trioctanoate, triisopalmitin and glyceryl acid.

Hydrocarbon oils include isododecane, isohexadecane, squalane, hydrogenated poly(C6-12) olefins, hydrogenated polyisobutene and the like.

Other powders may be spherical, needle-like, plate-like, or the like, and their shape is not particularly limited. Examples include inorganic white pigments (e.g., titanium dioxide, zinc oxide, etc.); ), 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 blue, dark blue) etc.); pearl pigments (e.g., titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, colored titanium oxide-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 organic pigments such as No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, and Blue No. 404; Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. No., 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, β-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, silicic acid magnesium, strontium silicate, metal tungstate, magnesium, silica, alumina, zeolite, barium sulfate, calcined calcium sulfate (calcined gypsum), calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, boron nitride, etc.); organic powders (e.g. , Polyamide resin powder (nylon powder), Polyethylene powder, Polymethyl (meth)acrylate powder, Polystyrene powder, Copolymer resin powder of styrene and acrylic acid, Silicone resin powder, Benzoguanamine resin powder, Polytetrafluoroethylene powder, cellulose powder, etc.); metal soaps (e.g., zinc myristate, palm calcium tinate, aluminum stearate); organically modified clay minerals (eg, organically modified bentonite, organically modified hectorite, etc.);

Examples of alcohols include cetanol, batyl alcohol, behenyl alcohol, palmitoleyl alcohol, heptadecanol, 1-heptadecanol, stearyl alcohol, isostearyl alcohol, elaidyl alcohol, oleyl alcohol, linoleyl alcohol, and elaidolinoleyl alcohol. , linolenyl alcohol, elide linolenyl alcohol, ricinoleyl alcohol, nonadecyl alcohol, arachidyl alcohol, heneicosanol, behenyl alcohol, erucyl alcohol and other monohydric alcohols; ethylene glycol, 1,3-butylene Glycol, trimethylene glycol, 1,2-butylene glycol, propylene glycol, dipropylene glycol, propanediol, 1,2-pentanediol, 3-methyl-1,3-butanediol, tetramethylene glycol, 2,3-butylene dihydric alcohols such as glycol, pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol and octylene glycol; trihydric alcohols such as trimethylolpropane; tetrahydric alcohols such as pentaerythritol; xylitol pentahydric alcohols such as triglycerin, tetraglycerin, polyglycerin polyhydric alcohol polymers such as polyglycerin; sugar alcohols such as starch-degrading sugar reducing alcohol; polyglycerin;
Ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono-2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl alcohol alkyl ethers such as ethers;
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 alcohol alkyl ethers such as 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; erythritol ether, and the like.

As ethers, in addition to those corresponding to the above alcohols,
Ethylene glycol dimethyl ether, 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 diazibate, ethylene glycol disuccinate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, propylene glycol monophenyl ether Acetate etc. are mentioned.

Examples of moisturizing agents include chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caroninic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, dl-pyrrolidone carboxylate, short-chain soluble collagen, and diglycerin (EO) PO. Examples include adducts, Isophylla extract, Achillea millefolium extract, Melilot extract and the like.

Surfactants include anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants.

Examples of anionic surfactants include fatty acid soaps (e.g., sodium laurate, sodium palmitate, etc.); higher alkyl sulfate salts (e.g., sodium lauryl sulfate, potassium lauryl sulfate, etc.); alkyl ether sulfates (e.g., , POE lauryl sulfate triethanolamine, POE sodium lauryl sulfate, etc.); N-acylsarcosic acid (e.g., sodium lauroyl sarcosinate, etc.); higher fatty acid amide sulfonates (e.g., N-myristoyl-N-methyltaurate sodium, coconut oil fatty acid methyl tauride sodium, lauryl methyl tauride sodium, etc.); phosphate ester salts (POE oleyl ether phosphate, POE stearyl ether phosphate, etc.); lauroyl monoethanolamide sodium polyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate, etc.); higher fatty acid ester sulfate (e.g., sodium hydrogenated coconut oil fatty acid glycerol sulfate, etc.); sodium, etc.); sulfated oil (e.g., funnel oil, etc.); POE alkyl ether carboxylic acid; POE alkyl allyl ether carboxylate; α-olefin sulfonate; higher fatty acid ester sulfonate; higher fatty acid alkylolamide sulfate; sodium lauroyl monoethanolamide succinate; N-palmitoyl aspartic acid ditriethanolamine; sodium caseinate;

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 and the like.

Amphoteric surfactants include, for example, imidazoline amphoteric surfactants (e.g., 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide side-1-carboxyethyloxy disodium salt, etc.); betaine surfactants (e.g., 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkylbetaine, amidobetaine , sulfobetaine, etc.) and the like.

Nonionic surfactants include polyether-modified silicones (eg, 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, sorbitan sesquioleate, sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate, etc.); glycerol fatty acids ( For example, monocottonseed fatty acid glycerol, glyceryl monoerucate, glyceryl sesquioleate, glyceryl monostearate, α,α'-pyroglutamic acid glyceryl monostearate, glyceryl monostearate malic acid, etc.); propylene glycol fatty acid esters (e.g., mono propylene glycol stearate, 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 ether. Also, polyglycerin fatty acid esters (e.g., polyglyceryl monooleate, polyglyceryl monostearate, 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 sorbitol monolaurate, POE sorbitol monooleate, POE sorbitol pentaoleate, POE sorbitol monostearate, etc.); POE glycerin fatty acid esters (e.g., POE glycerin monostearate, POE glycerin monostearate); isostearate, POE monooleate such as POE glycerol 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 alkylphenyl ethers (eg, POE nonylphenyl ether, etc.); 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/tetraPOP 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 monoisostearic acid diester, POE hydrogenated castor oil maleic acid, etc.); POE beeswax/lanolin derivatives (e.g., POE sorbitol beeswax, etc.); POE propylene glycol fatty acid ester; POE alkylamine; POE fatty acid amide; sucrose fatty acid ester; alkyl glucoside; Also included are hydrophilic nonionic surfactants such as ylphosphoric acid.

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

Pearl agents include, for example, glycol distearate and titanium mica.

Amino acids include, for example, neutral amino acids (eg, threonine, cysteine, etc.); basic amino acids (eg, hydroxylysine, etc.) and the like. Examples of amino acid derivatives include sodium acyl sarcosinate (sodium lauroyl sarcosinate), acyl glutamate, sodium acyl β-alanine, glutathione, pyrrolidone carboxylic acid and the like.

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

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

Examples of pH adjusters include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, succinic acid-sodium succinate, etc., and usually for adjusting the pH of the internal phase (aqueous component). Used.

Examples of vitamins include vitamins A, B1, B2, B6, C, E and derivatives thereof, pantothenic acid and derivatives thereof, biotin and the like.

Examples of antioxidants include tocopherols, dibutylhydroxytoluene (BHT), butylhydroxyanisole, pyrosulfite, gallic acid ester, phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, and fumaric acid. , cephalin, hexametaphosphate, phytic acid, ethylenediaminetetraacetic acid, and the like.

Examples of antiseptics include parabens and phenoxyethanol.

Examples of water-soluble polymers include plant-based polymers (e.g., gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), algae colloid (cassou extract), starch (rice , corn, potato, wheat), glycyrrhizic acid); microbial macromolecules (e.g., xanthan gum, dextran, succinoglucan, bullulan, etc.); animal macromolecules (e.g., collagen, casein, albumin, gelatin, etc.) a water-soluble polymer of
starch-based polymers (e.g., carboxymethyl starch, methylhydroxypropyl starch, etc.); methyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose, cellulose powder, etc.);
Synthetic water-soluble polymers such as polyoxyethylene-based polymers (eg, polyethylene glycol 20,000, 40,000, 60,000, etc.); polyethyleneimine; and cationic polymers.

Examples of various active ingredients include antiphlogistic agents (e.g., salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.); whitening agents (e.g., placenta extract, saxifrage extract, arbutin, resorcinol derivatives, etc.); , Phellodendron, Coptis, Chikon, Peony, Japanese juniper, Birch, Sage, Loquat, Carrot, Aloe, Mallow, Iris, Grape, Yokuinin, Loofah, Lily, Saffron, Cnidium, Shokyu, Hypericum, Ononis, Garlic, Red pepper, Chimp, Angelica keiskei, seaweed, etc.), activators (e.g., royal jelly, photosensitizers, cholesterol derivatives, etc.); tincture, ictamol, tannic acid, α-borneol, tocopherol nicotinate, inositol hexanicotinate, cyclanderate, cinnarizine, tolazoline, acetylcholine, verapamil, cepharanthine, γ-oryzanol, etc.); etc.);

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded.

<Production example and evaluation>
With the formulation ingredients shown in Table 1, the oil phase component and the water phase component are heated to 70°C and dissolved respectively, the oil phase is added to the water phase component, and emulsified while stirring with a homomixer to obtain an oil-in-water emulsified cosmetic. prepared.
Each obtained cosmetic was evaluated according to the following items and criteria. The results are also shown in Table 1.

(Lack of stickiness on the back skin)
After taking an appropriate amount of each cosmetic and applying it to the skin, 10 professional evaluators evaluated whether or not the skin felt sticky on the following 5-point scale, and the evaluation result was the sum of the scores of the 10 evaluators.
5: Feels no stickiness at all 4: Feels almost no stickiness 3: Feels slightly sticky 2: Feels sticky 1: Feels very sticky

(Lack of dryness over time)
After 5 hours from application of an appropriate amount of each cosmetic to the skin, 10 professional evaluators evaluated the dryness of the skin in the following 5 stages, and the evaluation result was the sum of the 10 evaluations.
5: No feeling of skin dryness at all 4: Almost no feeling of skin dryness 3: Some feeling of dryness of skin 2: Some feeling of dryness of skin 1: A feeling of considerable dryness of skin

(Storage stability under high temperature conditions)
Each cosmetic was placed in a standard glass bottle and stored in a constant temperature bath set at 50° C. for one month.
◎: No change in shape 〇: Almost no change in shape △: Some creaming can be seen ×: More than half of the shape cannot be maintained

Claims (8)

A sunscreen cosmetic containing the following component (A), component (B) and component (C).
(A) particulate metal oxide (B) hydrophilic film-forming polymer (C) niacinamide The cosmetic according to claim 1, wherein component (B) has a weight average molecular weight of 2,000 to 20,000. 3. Cosmetics according to claim 1 or 2, wherein component (B) is an acrylic polymer. 4. The cosmetic according to any one of claims 1 to 3, wherein component (A) is microparticles of titanium oxide. The cosmetic according to any one of claims 1 to 4, wherein the content of component (C) is 1 to 10% by weight of the total cosmetic. The cosmetic according to any one of claims 1 to 5, which is an oil-in-water emulsifier type. The cosmetic according to any one of claims 1 to 6, which contains component (A) and component (B) as an aqueous dispersion in which component (A) is dispersed in an aqueous medium containing component (B). fee. Any one of claims 1 to 6, comprising the step of mixing component (A) and component (B) to prepare an aqueous dispersion, and mixing the aqueous dispersion and component (C). 3. A method for producing the cosmetic according to .