JP2011073971A - Sunscreen cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sun screen cosmetic that is obtained by mixing clay mineral with soap and an ultraviolet absorber in an UV-A region, has a fresh after-feel and suppresses discoloration by an ultraviolet absorber. <P>SOLUTION: The sun screen cosmetic includes an oil-in-water type emulsion composition obtained by mixing 4-tert-butyl-4'-methoxydibenzoylmethane with hectorite and soap but not an edetic acid. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sunscreen cosmetic. More specifically, the present invention relates to a sunscreen cosmetic that suppresses discoloration in a sunscreen cosmetic containing a clay mineral, soap, and an ultraviolet absorber in a specific UV-A region.

In order to prevent the adverse effects of ultraviolet rays on the human body, various ultraviolet protective agents are blended in sunscreen cosmetics.
In particular, long wavelength ultraviolet light (UV-A) having a wavelength of 320 to 400 nm can cause wrinkle formation and skin elasticity reduction due to a decrease in the function of collagen in the skin, and can also cause skin cancer. Therefore, the importance of cosmetics for the purpose of defense is very great.
In addition to inorganic compounds such as zinc oxide, dibenzoylmethane compounds that are organic compounds, especially 4-tert-butyl-4′-methoxydibenzoylmethane, are used as UV protection agents in the UV-A region. It is widely used from the point of.

  4-tert-butyl-4′-methoxydibenzoylmethane, which is an ultraviolet protective agent in the UV-A region, is combined with fine particle titanium dioxide having an ultraviolet protective effect in the UV-B region to improve the ultraviolet protective effect. Is known. In addition to fine particle titanium dioxide, a cosmetic that can protect the UV-A region while having a skin color correction effect by combining 4-tert-butyl-4'-methoxydibenzoylmethane and pigment grade particle titanium dioxide. Has been prepared.

  However, when a dibenzoylmethane compound is blended with an inorganic powder, there is a fatal problem that discoloration occurs. Among inorganic powders, particularly when mixed with titanium dioxide, a significant yellowing occurs. This significantly deteriorates the appearance as a cosmetic material along with a decrease in functions such as a skin color correction effect.

Such discoloration such as yellowing caused by the ultraviolet absorber is a fatal problem affecting the reliability from the product characteristics of cosmetics. As a means for solving these discoloration, a method using a sequestering agent selected from edetic acid, metaphosphoric acid, polyphosphoric acid or salts thereof (for example, Patent Document 1), titanium dioxide is coated with silicone, and A method of processing (for example, Patent Document 2) is effective.
Moreover, in patent document 3, 15-50 mass% of silica is coat | covered on the surface of fine particle titanium oxide, and compounding the complex pigment with an average particle diameter of 0.01-0.2 micrometer is carried out, and pale yellow 4-tert. Precipitation of -butyl-4'-methoxydibenzoylmethane crystals is prevented.

On the other hand, in order to provide a sunscreen cosmetic having a fresh feeling of use, a sunscreen cosmetic comprising an oil-in-water emulsion composition in which montmorillonite and soap are used in combination has been developed (Patent Document 4).
However, the clay mineral powder such as montmorillonite is also concerned about discoloration due to the ultraviolet absorber. Therefore, there is a problem in that the ultraviolet absorber blended for producing a sunscreen cosmetic using montmorillonite and soap together is limited to a specific ultraviolet absorber that does not cause discoloration. And 4-tert-butyl-4'-methoxydibenzoylmethane has a high possibility of discoloring powder of clay minerals such as montmorillonite.

Therefore, discoloration due to the interaction between montmorillonite and other clay minerals and UV absorbers is considered to be discoloration due to the reaction between UV absorbers and metal ions in clay minerals, and this discoloration is suppressed to some extent by adding a chelating agent. An attempt to do so is conceivable.
On the other hand, even if the discoloration due to the UV absorber is suppressed to some extent by the addition of the chelating agent, in the design of the uncolored cosmetic, the influence of the color of montmorillonite itself appears, which is preferable in designing the intended cosmetic. Sometimes it is not.

JP 61-215314 A JP-A-9-2929 JP-A-11-217322 JP-A-5-262634

  In view of the above-mentioned circumstances, the present inventors combined montmorillonite and soap, and as a result of intensive research to develop sunscreen cosmetics having a fresh feeling of use, surprisingly, instead of montmorillonite as a clay mineral When hectorite is used, it has been found that discoloration can be efficiently suppressed even when 4-tert-butyl-4′-methoxydibenzoylmethane is used as an ultraviolet absorber and without using a chelating agent. The present invention has been completed.

  The object of the present invention is to use 4-tert-butyl-4'-methoxydibenzoylmethane as an ultraviolet absorber, and to have a fresh feeling of use by using clay minerals and soap, and to prevent discoloration due to the ultraviolet absorber. It is to provide a sunscreen cosmetic that can be prevented.

  The present invention relates to a sunscreen cosmetic comprising an oil-in-water emulsion composition characterized by blending 4-tert-butyl-4′-methoxydibenzoylmethane, hectorite, and soap, and not blending edetic acids. It is to provide.

  The sunscreen cosmetic according to claim 1, wherein the soap is an alkane metal salt or triethanolamine salt of isostearic acid, stearic acid, or behenic acid.

(1) The sunscreen cosmetic comprising the oil-in-water emulsion composition of the present invention may contain 4-tert-butyl-4′-methoxydibenzoylmethane, hectorite and soap, or a chelating agent. Discoloration can be suppressed.
(2) The use of hectorite itself is also a white powder compared to montmorillonite, which is advantageous for the design of cosmetics related to coloring.
(3) The sunscreen cosmetic of the present invention is excellent in the ultraviolet absorption effect in the UV-A region.
(4) The sunscreen cosmetic of the present invention is excellent in fresh feeling.

  The present invention is described in detail below.

<Ultraviolet absorber>
4-tert-butyl-4′-methoxydibenzoylmethane is used. Commercially available 4-tert-butyl-4′-methoxydibenzoylmethane (Parsole 1789 (DSM Nutritional Products)) can be used.
0.1-5 mass% is preferable with respect to the total amount of sunscreen cosmetics, and, as for the compounding quantity, 1-3 mass% is more preferable.
As long as the effect of suppressing discoloration of the present invention is not impaired, other ultraviolet absorbers may be blended. For example, ultraviolet absorbers such as ethyl hexyl methoxycinnamate, ethyl hexyl triazine, and phenylbenzimidazole sulfonic acid can be blended as long as the effects of the present invention are not impaired.
On the other hand, it is also preferable to use only 4-tert-butyl-4′-methoxydibenzoylmethane as the ultraviolet absorber.

<Hectorite>
It is a clay mineral used in cosmetics, and commercially available Laponite XLG and Laponite CP (both manufactured by Laporte Industries) can be preferably used. Since it is a white powder, discoloration is suppressed according to the present invention, so it is easier to design a colored sunscreen cosmetic than montmorillonite.
The blending amount is preferably 0.3 to 1.5% by mass and more preferably 0.4 to 0.7% by mass with respect to the total amount of the sunscreen cosmetic.

<Soap>
Alkali metal salts and triethanolamine salts of higher fatty acids are preferred. Specifically, it is preferable to use an alkane metal salt or triethanolamine salt of isostearic acid, stearic acid, or behenic acid. It is preferable that higher fatty acids and alkane metals such as Na and K or triethanolamine are separately blended in the formulation to constitute soap in the system.
The blending amount is preferably 1.5 to 3.5% by mass, and more preferably 2.0 to 3.0% by mass with respect to the total amount of the sunscreen cosmetic.

<Oil-in-water emulsion composition>
Along with the above essential ingredients, a preferred oil, a preferred surfactant (emulsifier), and water are blended according to the product, and a sunscreen cosmetic of an oil-in-water emulsion composition is produced by a conventional method.

<Oil content>
Hydrocarbon oils, higher fatty acids, higher alcohols, ester oils, silicone oils and the like are appropriately blended.
Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, squalene, petrolatum and the like.
Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), and the like. Is mentioned.
Examples of higher alcohols include linear alcohols (eg, lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol); branched chain alcohols (eg, monostearyl glycerin ether (batyl alcohol) ), 2-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyl decanol, isostearyl alcohol, octyldodecanol and the like.
Examples of ester oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, lactic acid Myristyl, lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, Diisostearyl malate, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trime triisostearate Roll propane, tetra-2-ethylhexanoic acid pentaerythritol, tri-2-ethylhexanoic acid glycerin, trioctanoic acid glycerin, triisopalmitic acid glycerin, triisostearic acid trimethylolpropane, cetyl 2-ethylhexanoate, 2-ethylhexyl Palmitate, glyceryl trimyristate, glyceride tri-2-heptylundecanoate, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid 2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyl adipate Decyl, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.
Examples of the silicone oil include linear polysiloxanes (for example, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxanes (for example, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexyl). And silicone resins that form a three-dimensional network structure, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.) It is done.
Specific oils preferred for the present invention are behenyl alcohol, batyl alcohol, dimethylpolysiloxane, diphenylpolysiloxane, olefin oligomer, diisopropyl sebacate and the like.
The blending amount of the oil is preferably 5.0 to 20.0% by mass and more preferably 8.0 to 15.0% by mass with respect to the total amount of the sunscreen cosmetic.

<Surfactant>
As the surfactant used in the present invention, a lipophilic nonionic surfactant, a hydrophilic nonionic surfactant and the like are appropriately blended.
Examples of the lipophilic nonionic surfactant include sorbitan fatty acid esters (for example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, Sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate); glycerin polyglycerin fatty acids (eg mono cottonseed oil fatty acid glycerin, glyceryl monoerucate, glyceryl sesquioleate, monostearin) Glycerin acid, α, α'-oleic acid pyroglutamate glycerin, monostearic acid glycerin malic acid, etc.); propylene glycol fatty acid esters (eg monostearies) Propylene glycolate, etc.); hardened castor oil derivative; glycerin alkyl ether, etc.
Examples of hydrophilic nonionic surfactants include POE-sorbitan fatty acid esters (for example, POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, etc.); POE sorbite fatty acid esters (eg, POE-sorbite monolaurate, POE-sorbite monooleate, POE-sorbite pentaoleate, POE-sorbite monostearate, etc.); POE-glycerin fatty acid esters (eg, POE-glycerin) Monostearate, POE-glycerol monoisostearate, POE-monooleate such as POE-glycerol triisostearate, etc.); POE-fatty acid esters (for example, POE-distearate, POE-monodiolate, ethylene glycol distearate, etc.); POE-alkyl ethers (eg POE- Uril ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-2-octyldodecyl ether, POE-cholestanol ether, etc.); Pluronic type (for example, Pluronic, etc.); POE / POP-alkyl ether (For example, POE / POP-cetyl ether, POE / POP-2-decyltetradecyl ether, POE / POP-monobutyl ether, POE / POP-hydrogenated lanolin, POE / POP-glycerin ether, etc.); Tetra POE / tetra POP-ethylenediamine condensates (eg Tetronic, etc.); POE-castor oil hardened castor oil derivatives (eg POE-castor oil, POE-hardened castor oil, POE-hardened castor oil monoisostearate, POE-hardened castor Oil triisostearate, POE-hardened castor oil monopyroglutamic acid monoisostearic acid diester, POE-hardened castor oil maleic acid, etc.); PO E-beeswax lanolin derivatives (eg POE-sorbite beeswax); alkanolamides (eg coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, etc.); POE-propylene glycol fatty acid ester; POE-alkylamine POE-fatty acid amide; sucrose fatty acid ester; alkyl ethoxydimethylamine oxide; trioleyl phosphate and the like.
Specific surfactants preferred for the present invention are PEG-5 glyceryl stearate, glycerin monostearate, POE-phytosterol and the like.
1.0-4.0 mass% is preferable with respect to the sunscreen cosmetics whole quantity, and, as for the compounding quantity of surfactant, 2.0-3.0 mass% is more preferable.

  The amount of water is preferably 45 to 75% by mass, more preferably 50 to 65% by mass, based on the total amount of the sunscreen cosmetic.

<Chelating agent>
A chelating agent is not mix | blended with this invention. Even if a chelating agent is not blended, hectorite discoloration due to the ultraviolet absorber can be suppressed. Here is the inventive step of the present invention.
The chelating agent in the present invention is specifically EDTA (edetic acid).
In the present invention, even if the chelating agent is not substantially used, for example, 0.01 mass% or less or not blended at all with respect to the sunscreen cosmetic, the chelating agent is blended to suppress discoloration. An effect equivalent to the effect can be obtained.

In addition to the essential components described above, the sunscreen cosmetics of the present invention include other components usually used in cosmetics, such as powder components, humectants, water-soluble polymers, thickeners, film agents, lower alcohols, If necessary, polyhydric alcohol, sugar, amino acid, organic amine, polymer emulsion, pH adjuster, skin nutrient, vitamin, antioxidant, antioxidant aid, and fragrance as long as the effects of the present invention are not impaired. The sunscreen cosmetics of the oil-in-water emulsion composition can be produced by a conventional method.
Specific ingredients are listed below, but the sunscreen cosmetics of the present invention can be prepared by blending the above essential ingredients and one or more of the following ingredients within a range not impairing the effects of the present invention. .

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

  Examples of the humectant include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate Sodium lactate, bile salt, dl-pyrrolidone carboxylate, short-chain soluble collagen, diglycerin (EO) PO adduct, Izayoi rose extract, yarrow extract, merirot extract and the like.

  Examples of natural water-soluble polymers include plant-based polymers (for example, gum arabic, gum tragacanth, galactan, guar gum, carob gum, caraya gum, carrageenan, pectin, agar, quince seed (malmello), alge colloid (guckweed extract), starch (Rice, corn, potato, wheat), glycyrrhizic acid}; microbial polymers (eg, xanthan gum, dextran, succinoglucan, bull run); others (eg, fish-derived collagen, fish-derived gelatin, wheat protein, silk protein) Etc.).

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

  Synthetic water-soluble polymers include, for example, vinyl polymers (eg, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer); polyoxyethylene polymers (eg, polyethylene glycol 20,000, 40,000, 60,000). Polyoxyethylene polyoxypropylene copolymer, etc.); acrylic polymers (for example, sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc.); polyethyleneimine; cationic polymers, and the like.

  Examples of the thickener include gum arabic, carrageenan, caraya gum, gum tragacanth, carob gum, quince seed (malmello), casein, dextrin, gelatin, sodium pectate, sodium alginate, methylcellulose, ethylcellulose, CMC, hydroxyethylcellulose, hydroxypropyl Cellulose, PVA, PVM, PVP, Sodium polyacrylate, carboxyvinyl polymer, locust bean gum, guar gum, tamarind gum, cellulose dialkyldimethylammonium sulfate, xanthan gum, magnesium aluminum silicate, bentonite, AlMg silicate (vee gum), silicic anhydride Etc.

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

  Examples of the polyhydric alcohol include divalent alcohols (for example, ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, Pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, octylene glycol, etc.); trivalent alcohol (eg, glycerin, trimethylolpropane, etc.); tetravalent alcohol (eg, 1,2,6) Pentaerythritol such as hexanetriol); pentahydric alcohol (eg, xylitol, etc.); hexavalent alcohol (eg, sorbitol, mannitol, etc.); polyhydric alcohol polymer (eg, diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene Glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, polyglycerin, etc.); divalent alcohol alkyl ethers (for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene) Glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono 2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, etc.) ; Dihydric alcohol alkyl ester Tellurium (for example, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether , Propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol butyl ether, etc.); divalent alcohol Ether esters (eg, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diazinate, ethylene glycol disuccinate, diethylene glycol monoethyl ether acetate, diethylene glycol) Monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, propylene glycol monophenyl ether acetate, etc .; glycerin monoalkyl ethers (for example, Kimyl alcohol, Serakir al Sugar alcohol (for example, sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, amylolytic sugar, maltose, xylitolose, amylolytic sugar reducing alcohol, etc.); Solid; Tetrahydrofurfuryl alcohol; POE-Tetrahydrofurfuryl alcohol; POP-Butyl ether; POP / POE-Butyl ether; Tripolyoxypropylene glycerin ether; POP-glycerin ether; POP-glycerin ether phosphate; POP / POE-pentane erythritol Examples include ether and polyglycerin.

  Monosaccharides include, for example, tricarbon sugars (eg, D-glyceryl aldehyde, dihydroxyacetone, etc.); tetracarbon sugars (eg, D-erythrose, D-erythrulose, D-treose, erythritol, etc.); pentose sugars (eg, , L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, L-xylulose, etc .; hexose (eg, D-glucose, D-talose, D) -Bucicose, D-galactose, D-fructose, L-galactose, L-mannose, D-tagatose, etc.); pentose sugar (eg, aldheptose, heproose, etc.); octose sugar (eg, octulose, etc.); For example, 2-deoxy-D-ribose, 6-deoxy-L-galactose, 6-deoxy-L-mannose, etc .; amino sugar (eg, D-glucosamine, D-galactosamine, shea Acid, Aminouron acid, muramic acid); uronic acid (e.g., D- glucuronic acid, D- mannuronic acid, L- guluronic acid, D- galacturonic acid, L- iduronic acid) and the like.

  Examples of the oligosaccharide include sucrose, umbelliferose, lactose, planteose, isolicnose, α, α-trehalose, raffinose, lycnose, stachyose verbus course and the like.

  Examples of the polysaccharide include cellulose, quince seed, chondroitin sulfate, starch, galactan, dermatan sulfate, glycogen, gum arabic, heparan sulfate, hyaluronic acid, tragacanth gum, keratan sulfate, chondroitin, xanthan gum, mucoitin sulfate, guar gum, dextran, kerato sulfate. , Locust bingham, succinoglucan, caronic acid and the like.

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

  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. Is mentioned.

  Examples of the polymer emulsion include an acrylic resin emulsion, a polyethyl acrylate emulsion, an acrylic resin liquid, a polyacryl alkyl ester emulsion, a polyvinyl acetate resin emulsion, and a natural rubber latex.

  Examples of the pH adjuster include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.

  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 the antioxidant include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters and the like.

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

  Other components include, for example, preservatives (methylparaben, ethylparaben, butylparaben, phenoxyethanol, etc.); anti-inflammatory agents (eg, glycyrrhizic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.); whitening agents (E.g., Yukinoshita extract, arbutin, tranexamic acid, L-ascorbic acid, L-ascorbic acid phosphate magnesium salt, L-ascorbic acid glucoside, potassium 4-methoxysalicylate, etc.); various extracts (e.g. , Sicon, peony, assembly, birch, sage, loquat, carrot, aloe, mallow, iris, grape, yokuinin, loofah, lily, saffron, senkyu, ginger, hypericum, onionis, garlic , Capsicum, chimpi, toki, seaweed, etc.), activator (for example, royal jelly, photosensitizer, cholesterol derivative, etc.); blood circulation promoter (for example, nicotinic acid benzyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, gingerone, cann Talistin tincture, ictamol, tannic acid, α-borneol, tocopherol nicotinate, inositol hexanicotinate, cyclandrate, cinnarizine, trazoline, acetylcholine, verapamil, cephalanthin, γ-oryzanol, etc .; antiseborrheic agents (eg, sulfur, Anti-inflammatory agents (for example, thiotaurine, hypotaurine, etc.); bactericides (for example, benzoic acid and its salts, isopropylmethylphenol, undecylenic acid and its salts, undecylenic acid monoethanola) Cetyltrimethylammonium chloride, cetylpyridinium chloride, benzalkonium chloride, benzathonium chloride, alkyldiaminoethylglycine chloride, chlorhexidine chloride, orthophenylphenol, chlorhexidine gluconate, cresol, chloramine T, chlorxylenol, chlorcresol, chlorphenesin Chlorobutanol, 5-chloro-2-methyl-4-isothiazolin-3-one, salicylic acid and its salts, 1,3-dimethylol-5,5-dimethylhydantoin, alkylisoquinolinium bromide, domifene bromide, Sorbic acid and its salts, thymol, thiram, dehydroacetic acid and its salts, triclosan, trichlorocarbanilide, paraoxybenzoic acid ester, parachlorophenol, halocarban, pyro Roll, phenol, hexachlorophene, 2-methyl-4-isothiazolin-3-one, .. "-methylenebis (.'- (3-hydroxymethyl-2.5-dioxo-4-imida, lauroyl sarcosine sodium, resorcin, etc. ) And the like.

  The dosage form of the sunscreen cosmetic of the present invention is an oil-in-water emulsion composition. The product form of the present invention is preferably an emulsion, cream or the like.

A sunscreen emulsion which is an oil-in-water emulsified composition is produced by a conventional method with the formulation shown in “Table 1”, and 4-tert-butyl-4′-methoxydibenzoylmethane (Pulsol 1719), hectorite, montmorillonite The color change was observed visually. As a result, in Example 1 of the present invention, even when the chelating agent (trisodium edetate) was not blended, as in the case of blending (Comparative Example 4), no discoloration (discoloration that turned red) occurred. .
Comparative Examples 1 and 2 are blended with montmorillonite, but discoloration is severe without a chelating agent. However, in Comparative Example 3 in which a chelating agent is blended with Comparative Example 2, discoloration is suppressed.
This is because the chelating agent suppresses chelate formation between dibenzoylmethane and iron or aluminum in montmorillonite, but the discoloration of montmorillonite itself due to the color, time, and temperature gradually progresses. The degree of discoloration is larger than in the blended Example 1 and Comparative Example 4.

＊1： ４−tert−ブチル−４’−メトキシベンゾイルメタン（パルソール１７８９）との赤変の目視による評価基準
○ ：変色なし
○△：わずかに変色
× ：ピンクに変色
××：赤色に変色

* 1: Visual evaluation criteria for redness with 4-tert-butyl-4'-methoxybenzoylmethane (Pulsol 1789)
○: No discoloration ○ △: Slight discoloration ×: Pink discoloration ××: Red discoloration

  Other examples of the present invention will be given below. Both are sunscreen cosmetics comprising an oil-in-water emulsified composition that is excellent in UV-A absorption effect in the UV-A region and a fresh feeling of use, and in which discoloration is suppressed.

[Example 2] Sunscreen emulsion Blending ingredients Blending quantity 1 Squalane 1.0
2 Decamethylpentasiloxane 10.0
3 Methylpolysiloxane 1.0
4 Polyether-modified silicone 1.0
5 Titanium oxide treated with aluminum stearate 1.0
(20% by mass of aluminum stearate for solution treatment)
6 Pentaerythrityl tetraoctanoate 5.0
7 4-tert-butyl-4′-methoxydibenzoylmethane 0.5
8 Stearic acid 1.5
9 Isostearic acid 0.5
10 Hectorite 0.5
11 Carboxyvinyl polymer 0.1
12 Triethanolamine 1.2
10 Glycerin 3.0
11 Butylene glycol 10.0
12 Silicic anhydride (spherical, nonporous) 0.5
13 Arbutin 5.0
14 Sodium hydroxide 0.15
15 Ethanol 2.0
16 Sodium pyrosulfite 0.005
17 Alkyl paraoxybenzoate 0.2
18 Remaining purified water <Production method>
A mixture obtained by mixing and dispersing 1 to 9 with a stirrer is added to a mixture of 10 to 18 and dispersed uniformly with a stirrer to obtain an emulsion.

Example 3 Sunscreen Cream Ingredient Ingredient Amount 1 Stearyl Alcohol 1.0
2 Solid paraffin 1.0
3 Petrolatum 1.0
4 Methylphenylpolysiloxane 3.0
5 Silica / silicone-treated titanium oxide 3.0
(10% by mass of silica and silicone to be treated with silicone solution after silica solution treatment)
6 Isostearic acid 1.0
7 Behenic acid 1.5
8 Jojoba oil 5.0
9 Trioctanoin 7.0
10 4-tert-butyl-4'-methoxydibenzoylmethane 3.0
11 POE (25) cetyl alcohol ether 1.0
12 Glycerin monostearate1.0
13 Retinol acetate 0.2
14 Dextrin 1.5
15 Hectorite 1.0
16 Glycerin 3.0
17 Butylene glycol 3.0
18 Silicic anhydride (fine particles, average particle size 0.02 μm) 3.0
19 Triethanolamine 1.2
18 Dibutylhydroxytoluene 0.05
19 Alkyl paraoxybenzoate 0.3
20 Remaining amount of purified water <Production method>
1 to 13 was mixed and dispersed with a stirrer, and the mixture heated to 70 ° C. was added to the mixture obtained by mixing 14 to 20 with heating at 70 ° C., uniformly dispersed with a stirrer, and cooled to give a cream. Get.

Example 4 Sunscreen Gel Ingredient Ingredient Amount 1 Octamethylcyclotetrasiloxane 8.0
2 Dodecamethylcyclohexasiloxane 2.0
3 Dimethicone / Vinyl Dimethicone Cross Polymer 2.0
4 Silicone-treated titanium oxide 0.2
(Contains 3% by mass of methylpolysiloxane for gas phase treatment)
5 Carboxylic acid modified silicone 0.1
6 Dioctyl succinate 5.0
7 4-tert-butyl-4′-methoxydibenzoylmethane 0.5
8 Stearic acid 0.5
9 Isostearic acid 1.0
10 Hectorite 0.5
11 Carboxyvinyl polymer 0.3
12 Acrylic acid / alkyl acrylate copolymer 0.3
13 Xanthan gum 0.3
14 Agar 0.5
15 Butylene glycol 5.0
16 Silicic anhydride (rod-like, porous) 5.0
17 Vitamin C-2 Glucoside 5.0
18 Sodium hydroxide 0.02
19 Triethanolamine 0.9
20 Dibutylhydroxytoluene 0.05
21 Alkyl paraoxybenzoate 0.3
22 Remaining purified water <Production method>
Disperse 1-5 with a disperser, add 10-22 to the one mixed uniformly, add 6-9 heated to 70 ° C and dissolve, and disperse the gel uniformly with a stirrer. obtain.

Example 5 Sunscreen Latex Ingredient Ingredient Amount 1 Methylphenylpolysiloxane 2.0
2 Squalane 2.0
3 Pentaerythrityl tetraoctanoate 2.0
4 Octyl methoxycinnamate 10.0
5 Fatty acid-treated titanium oxide 5.0
(Contains 15% by mass of stearic acid for solution treatment)
6 Silicone-treated zinc oxide 2.0
7 Behenyl alcohol 1.0
8 Behenic acid 1.0
9 Palmitic acid 1.0
10 Glycerol monostearate1.0
11 4-tert-butyl-4′-methoxydibenzoylmethane 3.0
12 Octyl rearzone 1.5
13 Hectorite 2.0
14 Glycerin 2.0
15 Propylene glycol 5.0
16 Triethanolamine 1.2
16 Silicic anhydride (spherical, porous) 5.0
17 Polyethylene glycol 2.0
18 Potassium hydroxide 0.12
19 Sodium pyrosulfite 0.05
20 Alkyl paraoxybenzoate 0.3
21 Phenoxyethanol 0.3
22 Remaining purified water <Production method>
What was uniformly dispersed by 1 to 6 with a disperser is heated to 70 ° C. and 7 to 12 is added and dissolved to adjust the oil phase. A sunscreen emulsion is obtained by adding 13 to 22 uniformly, adding an oil phase to an aqueous phase heated to 70 ° C., uniformly dispersing and cooling with an agitator.

Example 6 Makeup Base Sunscreen Cream Ingredient Ingredient Amount 1 Decamethylcyclopentasiloxane 5.0
2 Trimethylsiloxysilicate 3.0
3 Methylphenylpolysiloxane 2.0
4 Silicone-treated titanium oxide 2.0
(Contains 10% by mass of methylpolysiloxane for solution treatment)
5 Octyl methoxycinnamate 7.0
6 4-tert-butyl-4'-methoxydibenzoylmethane 1.0
7 Behenic acid 2.0
8 Polyethylene glycol 5.0
9 Silicic anhydride (plate) 1.0
10 Pearlescent pigment 1.0
11 Hydrogenated hydrogenated castor oil 1.0
12 PEG / PPG copolymer 1.0
13 Succinoglycan 0.5
14 Hectorite 1.0
15 Triethanolamine 1.2
16 Sodium pyrosulfite 0.05
17 Alkyl paraoxybenzoate 0.3
18 Remaining purified water <Production method>
1 to 4 is dispersed with a disperser, 8 to 18 is added to the uniformly mixed product, and 5 to 7 is heated to 70 ° C and dissolved, and then uniformly dispersed with a stirrer. Get sunscreen cream.

  According to the present invention, 4-tert-butyl-4′-methoxydibenzoylmethane is used as an ultraviolet absorber, further blended with clay mineral and soap, has a fresh feeling of use, and discoloration due to the ultraviolet absorber does not occur. It is possible to provide a sunscreen cosmetic that can be suppressed without using a chelating agent.

Claims (2)

  A sunscreen cosmetic comprising an oil-in-water emulsion composition, comprising 4-tert-butyl-4'-methoxydibenzoylmethane, hectorite, and soap, and not containing edetic acids.   The sunscreen cosmetic according to claim 1, wherein the soap is an alkane metal salt or triethanolamine salt of isostearic acid, stearic acid, or behenic acid.