TW201822754A - Oil-in-water ultraviolet light shielding cosmetic composition - Google Patents

Abstract

Provided is an oil-in-water ultraviolet light shielding cosmetic composition which has good feeling of use and is thus able to be used every day, while exhibiting uniform and high ultraviolet light shielding effect. An oil-in-water ultraviolet light shielding cosmetic composition which contains the following components (A), (B), (C), (D) and (E). (A) one or more oil-soluble ultraviolet absorbents selected from among 2-ethylhexyl para-methoxycinnamate, 2, 4, 6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1, 3, 5-triazine, 4-tert-butyl-4'-methoxydibenzoylmethane, octocrylene, 2-ethylhexyl dimethoxybenzylidenedioxoimidazolidine- propionate, diethylamino hydroxybenzoyl hexyl benzoate ester, bis-ethylhexyloxyphenol methoxyphenyl triazine, methylene bis-benzotriazolyl tetramethylbutylphenol, phenylbenzimidazole sulfonic acid and dimethicodiethyl benzalmalonate (B) an oil agent that is in a liquid state at 20 DEG C (excluding the component (A)) (C) a dextrin fatty acid ester (D) from 0.5% by mass to 2% by mass (inclusive) of a hydrophobic silica (E) a water-soluble polymer having a constituent unit derived from a (meth)acrylic acid or sulfonic acid.

Description

   Oil-in-water UV protection cosmetic   

The present invention relates to a water-in-oil type emulsion-based UV-defense cosmetic.

UV-blocking sunscreen cosmetics are formulated to block UV rays from irradiating the skin and obtain a high SPF (Sun Protection Factor) value, and are blended with UV absorbers or UV scattering agents. In particular, the oil-in-water composition containing these is widely used because it is a high SPF sunscreen cosmetic having excellent water resistance.

However, the water-in-oil composition may be sticky or sticky during application, and the ultraviolet ray scattering agent may have a rough feeling or dead whiteness.

Therefore, there have been reports of water-in-oil type sunscreen cosmetics which can suppress stickiness and stickiness and have a good feeling of use (Patent Documents 1 to 4).

(Patent Document 1) Japanese Patent Laid-Open No. 2008-162930

(Patent Document 2) Japanese Patent Laid-Open No. 2014-105207

(Patent Document 3) Japanese Patent Laid-Open No. 2014-185137

(Patent Document 4) Japanese Patent Laid-Open No. 2016-94405

The oil-in-water type UV defense cosmetic provided by the present invention contains the following components (A), (B), (C), (D), and (E): (A) from: p-methoxycinnamic acid- 2-ethylhexyl ester, 2,4,6-ginsane [4- (2-ethylhexyloxycarbonyl) aniline] -1,3,5-tris , 4-tert-butyl-4'-methoxydibenzoylmethane, octocrylene (isooctyl 2-cyano-3,3-diphenylacrylate), dimethoxy Benzylidenedioxyimidazolidinepropanoic acid-2-ethylhexyl ester, diethylaminohydroxybenzyl benzoic acid hexyl ester, diethylhexyloxyphenol methoxyphenyltris Oil, methylene bisbenzotriazolyl tetramethyl butyl phenol, phenyl benzimidazole sulfonic acid, and dimethicodiethyl benzalmalonate Soluble ultraviolet absorbers; (B) oils that are liquid at 20 ° C (except for component (A)); (C) dextrin fatty acid esters; (D) 0.5% by mass or more and 2% by mass of hydrophobic silica % Or less; (E) A water-soluble polymer having a structural unit derived from (meth) acrylic acid or sulfonic acid.

It is known that the oil-in-water UV-protective cosmetic material has a good use feeling such as stickiness or stickiness, but it has a problem that transparency or a uniform UV-protective effect cannot be obtained. When a system without a UV-scattering agent is used to suppress dead white and improve transparency, it is apparent that a sufficient UV-defense effect cannot be obtained.

Therefore, the present invention provides an oil-in-water type ultraviolet shielding cosmetic having a good feeling of use that can be used every day, and having a uniform and high ultraviolet shielding effect.

The present inventors reviewed the reasons why an oil-in-water UV-protective cosmetic containing an oil-soluble ultraviolet absorbent does not exhibit sufficient UV-protective effects. The cosmetic material remains in the skin groove portion, but the cosmetic coating film on the skin crotch portion becomes thinner, and as a result, a sufficient ultraviolet shielding effect cannot be obtained. Therefore, the present inventors conducted various reviews on the means for making the coating film adhere to the skin after drying, and found that in addition to the oil-soluble ultraviolet absorber and the liquid oil, dextrin fatty acid ester and hydrophobic silica were also used in combination. And a specific water-soluble polymer, a water-in-oil type UV defense cosmetic material having excellent UV protection effect and transparency, no rough feeling after drying, and good adhesion to the skin can be obtained, and the present invention has been completed.

The use of the oil-in-water type UV-defense cosmetic material of the present invention can form a coating film with good adhesion to the skin even after drying even after drying, and there is no rough feeling and transparent coating film after drying. At the same time, uniform and excellent UV protection effect. Therefore, the water-in-oil type UV protection cosmetic of the present invention has a good feeling of use that can be used daily, and a uniform and excellent UV protection effect.

The oil-in-water UV-protective cosmetic material of the present invention (hereinafter also referred to as "cosmetic material") contains the following components (A), (B), (C), (D), and (E): (A) from: to Methoxycinnamate-2-ethylhexyl, 2,4,6-ginsane [4- (2-ethylhexyloxycarbonyl) aniline] -1,3,5-tris , 4-Third-Butyl-4'-methoxydibenzylidenemethane, Oakleyline, Dimethoxybenzylidenedioxyimidazolidinepropionate 2-ethylhexyl, di Ethylaminobenzylbenzoic acid hexyl ester, diethylhexyloxyphenol methoxyphenyltris 1 or 2 or more oil-soluble ultraviolet absorbents selected from methylenebisbenzotriazolyltetramethylbutylphenol, phenylbenzimidazolesulfonic acid, and diethyl benzylmalonate (B) an oil agent in a liquid state at 20 ° C (except for component (A)); (C) a dextrin fatty acid ester; (D) 0.5% by mass or more and 2% by mass or less of hydrophobic silica; (E) An oil-in-water type ultraviolet shielding cosmetic having a water-soluble polymer having a constituent unit derived from (meth) acrylic acid or sulfonic acid.

Component (A) is an oil-soluble ultraviolet absorber selected from one or two or more of the following components. After each component, a representative raw material name and a manufacturer name, and properties at 20 ° C are indicated.

For example: 2-ethylhexyl p-methoxycinnamate (Uvinul MC80, made by BASF, liquid), 2,4,6-ginseng [4- (2-ethylhexyloxycarbonyl) aniline]- 1,3,5-three (Uvinul T150, manufactured by BASF, solid state), 4-tert-butyl-4'-methoxydibenzoylmethane (PARSOL 1789, manufactured by DSM Nutrition Japan, solid state), Oakley ( PARSOL 340, manufactured by DSM Nutrition Japan, liquid), dimethoxybenzylidenedioxyimidazolidinepropanoic acid 2-ethylhexyl (SOFT SHADE DH, AJINOMOTO HEALTHY SUPPLY, solid), Diethylaminohydroxybenzylbenzoic acid hexyl ester (Uvinul A PLUS GRANULAR, manufactured by BASF, solid state), bisethylhexyloxyphenol methoxyphenyltris (Tinosorb S, manufactured by BASF, solid state), methylene bisbenzotriazolyl tetramethylbutylphenol (Tinosorb M, manufactured by BASF, solid state), phenylbenzimidazole sulfonic acid (PARSOL HS, (Made by DSM Nutrition Japan, liquid), Diethyl dimethyl benzylmalonate (PARSOL SLX, made by DSM Nutrition Japan, liquid). Among these, it is preferable to use two or more types in combination from the viewpoint of obtaining a good ultraviolet shielding effect. Further, it preferably contains at least two kinds of p-methoxycinnamic acid-2-ethylhexyl ester and diethylaminohydroxybenzoylhexylbenzoate hexyl ester, and more preferably contains at least p-methoxycinnamic acid 2-ethylhexyl ester, diethylaminohydroxybenzyl benzoic acid hexyl ester, 2,4,6-ginseng [4- (2-ethylhexyloxycarbonyl) aniline] -1,3, 5-three , And diethylhexyloxyphenol methoxyphenyltris Wait for 4 kinds.

In addition, in the present invention, the "liquid state" refers to a state of fluidity under the environment of 1 atmosphere and 20 ° C, that is, the melting point is below 20 ° C (amorphous materials without melting points refer to fusion points). point) are below 20 ° C).

The content of the component (A) is preferably 0.6% by mass or more, more preferably 2% by mass or more, 5% by mass or more, and the best system based on the viewpoint of obtaining a good ultraviolet shielding effect. 8% by mass or more.

In addition, the content of the component (A) is preferably 30% by mass or less, more preferably 25% by mass or less from the viewpoint of suppressing stickiness and stickiness and maintaining a good use feeling with respect to the entire cosmetic. It is 18% by mass or less, and most preferably 16% by mass or less.

In addition, the content of the component (A) in the cosmetic is preferably 0.6 to 30% by mass, more preferably 2 to 25% by mass, 5 to 18% by mass in the best line, and 8 to 16% by mass in the best line.

In the cosmetic, the content of the component (A) in the entire amount of the ultraviolet absorber is preferably 90% by mass or more, and more preferably 95% by mass or more.

When component (A) is an oil-soluble ultraviolet absorbent in a solid state at 20 ° C, it is preferable to dissolve it in a liquid-state oil at 20 ° C from the viewpoint of obtaining a uniform and high UV-defense effect. The liquid agent at 20 ° C can be used in the form of liquid component (A) or component (B).

The component (B) is a liquid agent at 20 ° C (except for the component (A)).

Examples of the component (B) as the liquid agent at 20 ° C are: (B1) ester oil at 20 ° C, (B2) polysiloxane oil at 20 ° C, (B3) ) Hydrocarbon oil that is liquid at 20 ° C, ether oil with HLB less than 1, higher fatty acids, and higher alcohols. In addition, the "liquid state" mentioned here is the same as that of the component (A).

(B1) The ester oil that is liquid at 20 ° C is preferably selected from one or more selected from the group consisting of fatty acid monohydric alcohol esters, glycerol fatty acid esters, benzoates, and fatty acid triglycerides. .

More systems can be exemplified from: octyldodecyl myristate, isocetyl myristate, tris (2-ethylhexanoate) glyceride, glyceryl triisostearate, isostearic acid Propylene glycol ester, diethylhexyl sebacate, tri (2-ethylhexanoate) trimethylpropyl ester, bis (2-ethylhexyl succinate), bis (caprylic / decanoate) propylene glycol, 2- Cyano-3,3-diphenylacrylic acid 2-ethylhexyl ester, tris (caprylic / capric) glyceride, trimethylolpropyl tricaprylate, glyceryl tricaprylate, ethylene glycol dicaprylate, Glyceryl dimyristate, diethylene glycol dilaurate, pentaerythritol tetrakis (2-ethylhexanoate), glyceryl monostearate diacetate, diisostearyl malate, alkyl benzoate (C12 ~ C15) namely alkyl benzoate (C12 or higher and C15 or lower), octyl dodecyl lactate, oleic acid lactate, propylene glycol dihexanoate, diisopropyl sebacate, didecanoate di Ethylene glycol ester, neopentyl glycol dicaprate, neopentyl glycol di (2-ethylhexanoate), glyceryl dicoconut fatty acid, glyceryl dilaurate, glyceryl sesquioleate, mono Glycol oleate, cetyl lactate, sebac Select from the group consisting of diethyl ester, castor oil fatty acid methyl ester, isopropyl palmitate, ethylene glycol palmitate, bis (trimethylacetate) tripropylene glycol, and isotridecyl isononanoate 1 or more.

Among these, especially from the viewpoint of imparting an emollient effect and suppressing a rough feeling after drying, the component (B1) preferably contains alkyl benzoate (C12 to C15), isopropyl palmitate, and di (2) -Ethylhexanoic acid) neopentyl glycol ester, neopentyl glycol didecanoate, and isotridecyl isononanoate are selected from one or two or more. More preferably, it contains alkyl benzoate (C12 ~ C15).

Furthermore, the use of (B2) silicone oil in a liquid state at 20 ° C can increase the degree of non-stickiness in particular.

(B2) Specific examples of the polysiloxane oil in a liquid state at 20 ° C are preferably dimethylpolysiloxane and dimethylcyclopolysiloxane from the viewpoint of improving the non-sticking degree, and more preferably The viscosity at 25 ℃ is 20mPa. For dimethyl polysiloxane and dimethyl cyclopolysiloxane below s, the best viscosity is 20 mPa at 25 ℃. Dimethyl polysiloxane below s.

The viscosity can be measured at 25 ° C using a B-type viscometer (TOKI SANGYO VISCOMETER TVB-10M, manufactured by Toki Sangyo Co., Ltd.) and the rotor 1 at 60 rpm for 1 minute.

Furthermore, (B3) a hydrocarbon oil in a liquid state at 20 ° C., and an ether oil with an HLB less than 1, higher fatty acids, and higher alcohols can be used within a range where the stability of the preparation is not deteriorated for a long period of time.

(B3) Specific examples of the hydrocarbon oil in a liquid state at 20 ° C include α-olefin oligomers, liquid isoalkanes, light liquid isoalkanes, liquid paraffin, squalane, and the like.

The component (B) in the related cosmetics may be used alone (B1), (B2), or (B3) or in combination. When used alone, the component (B1) is preferred from the viewpoint of imparting an emollient effect and suppressing the coarseness after drying, and the component (B2) is preferred from the viewpoint of particularly improving the non-sticking degree. In addition, when used in combination, it is preferable to contain ingredient (B1) or ingredient (B2), because containing ingredients (B1) and (B2), at the same time, it can have a special emollient effect on the skin and improve the degree of non-stick These two characteristics are better because they can maintain a close feeling to the skin and have no rough feeling after drying.

In addition, the content of the component (B) in the cosmetic is preferably 0.5% by mass or more, more preferably 1% by mass or more, from the viewpoint of providing an emollient effect and suppressing stickiness. Good line 2 mass% or more.

From the same viewpoint, the content of the component (B) in the cosmetic is preferably 12% by mass or less, more preferably 8% by mass or less, and 7% by mass or less based on the entire cosmetic.

The content of the component (B) in the cosmetic is preferably 0.5 to 12% by mass, more preferably 1 to 8% by mass, and particularly good 2 to 7% by mass.

The component (C) is a dextrin fatty acid ester.

By containing the component (C), the oil phase of the cosmetic can be gelatinized, at the same time, the adhesion of the cosmetic to the skin is improved, and the adhesiveness of the dried cosmetic is improved. In addition, the UV protection effect has been improved.

(C) Dextrin fatty acid ester is an ester of fatty acid and dextrin. The carbon number of the fatty acid is preferably 8 to 24, and more preferably 14 to 18; the fatty acid is saturated or unsaturated in a straight or branched chain. Fatty acid; The average degree of polymerization of the component (C) is preferably 10 to 50, more preferably 20 to 30.

Specific examples are: palmitic acid dextrin, palmitic acid / 2-ethylhexanoic acid dextrin, stearic acid dextrin, palmitic acid / stearic acid dextrin, oleic acid dextrin, isopalmitic acid dextrin, Isostearic acid dextrin, myristic acid dextrin, etc. can be used. One or two or more kinds can be selected from these.

Commercially available products include, for example, palmitic dextrin (RHEOPEARL KL2, RHEOPEARL KS2, RHEOPEARL TL2), chitosan dextrin (RHEOPEARL TT2), and myristic acid dextrin (manufactured by Chiba Milling Co., Ltd.). RHEOPEARL MKL2), etc. (both manufactured by Chiba Milling Co., Ltd.).

The content of the component (C) in the cosmetic is preferably 0.2% by mass or more, and more preferably 0.3% by mass, from the viewpoint of improving the use feeling, the adhesiveness after drying, and the ultraviolet shielding effect. Above, 0.4% by mass of the best line, and from the viewpoint of no coarseness after drying, it is preferably 1.5% by mass or less, more preferably 1% by mass, particularly 0.7% by mass, the best line 0.6% by mass or less. Specifically, the content of the component (C) is preferably 0.2 to 1.5% by mass, more preferably 0.3 to 1% by mass, particularly preferably 0.4 to 0.7% by mass, and most preferably 0.4 to 0.6% by mass.

In addition, the mass ratio ((A + B) / C) of the total of the components (A) and (B) to the component (C) is effective in preventing ultraviolet rays, suppressing rough feeling during drying, and improving adhesion after drying. From the viewpoint of stability and long-term storage stability of the preparation, it is preferably 10 or more, more preferably 20 or more, and particularly good 30 or more. It is preferably 90 or less, more preferably 60 or less, and particularly preferably 50 or less. Specific ((A + B) / C) is preferably 10 to 90, more preferably 20 to 60, and particularly good 30 to 50.

Ingredient (D) is a hydrophobic silica. By containing the component (D), the oil phase of the cosmetic can be gelatinized, and at the same time, the cosmetic coating film on the skin can be maintained after drying, and the adhesiveness of the cosmetic after drying can be improved.

The component (D) is silicon dioxide whose surface is hydrophobized. Examples of the hydrophobizing treatment include: dimethyl silylation treatment, trimethyl silylation treatment, dimethyl polysiloxane treatment, dimethyl silane treatment, amine alkyl silylation treatment, alkane Silylation treatment, methacrylic silylation treatment, etc. Among them, from the viewpoint of the ultraviolet shielding effect, dimethyl silylation treatment is preferred.

In addition, the average primary particle diameter of the hydrophobic silicon dioxide of the component (D) is preferably from 5 nm to 50 nm, more preferably from 5 nm to 30 nm, and particularly preferably from 5 nm to 20 nm from the viewpoint of the ultraviolet shielding effect. In addition, in the present invention, the "average primary particle diameter" refers to the particle diameter of a prototype silicon dioxide powder constituting the component (D). The transmission electron microscope (TEM) is used at a magnification of 100,000 times. Under the conditions, the average primary particle diameter of about 2000 particles in the image can be calculated. From the viewpoint of the ultraviolet shielding effect, the average particle diameter of the component (D) is preferably 15 μm or less, more preferably 5 μm or less, and particularly preferably 1 μm or less.

When the content of the component (D) in the cosmetic is less than 0.5% relative to the total amount of the cosmetic, there may be a case where a sufficient ultraviolet shielding effect cannot be exhibited. From this point of view and from the viewpoint of maintaining a close feeling to the skin, the content of the component (D) in the cosmetic is preferably 0.5% by mass or more, more preferably 0.7% by mass or more, and 0.8% by mass with respect to the total amount of the cosmetic. Above mass%. In addition, when the content of the component (D) in the cosmetic is greater than 2% with respect to the total amount of the cosmetic, the use feeling may be deteriorated (a rough feeling may occur during drying). From this point, the content of the component (D) in the cosmetic is preferably 2% by mass or less, more preferably 1.5% by mass or less, and 1.3% by mass or less based on the total amount of the cosmetic. Specifically, the content of the component (D) is 0.5 to 2% by mass, more preferably 0.7 to 1.5% by mass, and particularly good 0.8 to 1.3% by mass.

In addition, the mass ratio ((A + B) / D) of the total of the components (A) and (B) to the component (D) is preferably 8 from the viewpoint of the ultraviolet shielding effect and the improvement of the adhesion after drying. Above, more preferably 12 or more, especially good 15 or more. From the viewpoint of no degree of coarseness after drying, it is preferably 40 or less, more preferably 35 or less, particularly good 30 or less, and most preferably 22 or less. The specific ((A + B) / D) is preferably 8 to 40, more preferably 12 to 35, particularly good 15 to 30, and best 15 to 22.

Component (E) is a water-soluble polymer having a structural unit derived from (meth) acrylic acid or sulfonic acid. By containing the ingredient (E), it is possible to improve long-term storage stability and tenderness of use. The term "(meth) acrylic acid" here refers to the concepts of methacrylic acid and acrylic acid.

The water-soluble polymer having a constituent unit derived from (meth) acrylic acid may be selected from, for example, methacrylic acid, acrylic acid, methacrylate, acrylate, methacrylamide, and acrylamide The monomer is a homopolymer constituting a unit, or a copolymer containing two or more of these monomers. More examples include carboxyvinyl polymers (such as Synthalen K, L, manufactured by Wako Pure Chemical Industries, Ltd.), acrylic acid. Alkyl methacrylate copolymer (for example, PEMULEN TR-1, TR-2, manufactured by Lubrizol), polypropylene amidamine (SEPIGEL 305) sold by SEPPIC, and (Na / acryl amidyl dimethyl acrylate) Na (sulfonic acid) copolymer (SIMULGEL EG), (Hydroxyethyl acrylate / propenyl dimethyl taurine Na) copolymer (SIMULGEL FL, SIMULGEL NS, SEPIPLUS S, SEPINOV EMT 10), (Acrylamine / Ammonium acrylate) copolymer (SEPIPLUS 265), polyacrylate-13 (SEPIPLUS 400), etc. One (2) or more (meth) acrylic polymers selected from these can be used.

The water-soluble polymer having a structural unit derived from a sulfonic acid may be, for example, stearyloxy PG hydroxyethyl cellulose sulfonic acid Na (POIZ 310, manufactured by Kao Corporation).

Among these, when used from acrylic. When one or two or more of methacrylic acid copolymer and (acrylic acid Na / acryl dimethyl taurine Na) copolymer are selected, the long-term storage stability of the composition can be stabilized from a small amount, And the use of a sense of improvement is better.

In the cosmetic of the present invention, from the viewpoint of improving the long-term storage stability of the cosmetic, the component (E) contained in the cosmetic is preferably 0.02% by mass or more, more preferably 0.15% by mass, and further improves the feeling of use. From a viewpoint, the content is preferably 1.0% by mass or less, and more preferably 0.8% by mass or less. Specifically, the content of the component (E) in the cosmetic is preferably 0.02 to 1.0% by mass, and more preferably 0.15 to 0.8% by mass. Here, the content of the component (E) refers to the content of the active ingredient contained in the product, and is not the amount of a commercially available product.

In addition, as long as the effect of the present invention is not impaired, water-soluble polymers other than the component (E) may be contained in the cosmetic. From the viewpoint of long-term stability and usability of the cosmetic, the water-soluble polymers other than the component (E) in the cosmetic are preferably 1% by mass or less, more preferably 0.5% by mass, and 0.1% by mass. Below%, the best is essentially 0% by mass.

The cosmetic of the present invention may further contain, for example, a surfactant, water, fragrance, humectant, beauty ingredient, medicinal ingredient, tackifier, bactericide, pH adjuster, antioxidant, preservative, and carbon. Alcohols having 1 to 5 alcohols (that is, alcohols having 1 to 5 carbon atoms), and other components used in general cosmetics.

As the surfactant, known anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants having an HLB of 1 or more can be used in addition to the component (B), thereby improving emulsification stability and inhibiting makeup. From the standpoint of sticky materials, it is preferred to contain a nonionic surfactant.

Examples of nonionic surfactants include: polyglycerol fatty acid esters, propylene glycol fatty acid esters, pentaerythritol fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, and polyoxyethylene Glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene plant sterol, polyoxyethylene stanol, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkylbenzene Ether, polyoxyethylene castor oil, polyoxyethylene hardened castor oil, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, polyoxyethylene beeswax derivatives, polyoxyethylene alkylamines, polyoxyethylene fatty acid amidines, Polyoxyethylene alkylphenyl formaldehyde polycondensate, single chain length polyoxyethylene alkyl ether, polyether modified polysiloxane, etc. Among these, one or two or more are preferably selected from polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, and polyoxyethylene hardened castor oil, and more preferably polyoxyethylene alkyl ether. From the same viewpoint, the number of alkyl carbons constituting the polyoxyethylene alkyl ether is preferably 12 to 22, and more preferably 14 to 20. From the same viewpoint, the number of alkyl carbons constituting the polyoxyethylene alkyl ether is preferably 12 or more, more preferably 14 or more, and more preferably 22 or less, and more preferably 20 or less. From the same viewpoint, the polyoxyethylene alkyl ether is preferably polyoxyethylene-2-hexyldecyl ether.

The content of the surfactant in the cosmetic is preferably from 0.001 to 1% by mass, more preferably from 0.005 to 0.5% by mass, from the viewpoint of improving the emulsification stability of the cosmetic and improving the stickiness suppression, The best line is 0.007 to 0.10% by mass, and the best line is 0.008 to 0.08% by mass.

Specific examples of the pH adjusting agent include, for example, sodium hydroxide, potassium hydroxide, ammonium chloride, triethanolamine, 2-amino-2-methylpropanol, 2-amino-2-methyl-1, Bases such as 3-propanediol, 2-amino-2-hydroxymethyl-1,3-propanediol; acids such as organic acids.

In addition, the cosmetic of the present invention may contain powders other than the above-mentioned components, and specific examples thereof include talc, starch, and resin powder. Among them, specific examples of the resin powder are, for example, polysiloxane resin powder, lauryl methacrylate. Diethylene glycol dimethacrylate. The powder of the sodium methacrylate copolymer is, for example, a resin powder described in Japanese Patent Laid-Open No. 2006-225311.

The cosmetic material of the present invention can be produced according to an ordinary method.

Specifically, cosmetics can be obtained in the following order. That is, at a predetermined temperature of about 25 ° C., in a blending tank containing water, if necessary, component (E) is added while stirring to prepare a water phase. On the other hand, at a predetermined temperature of about 80 ° C., components (A), (B), (C), and (D) are added in a predetermined order, and an oil phase is prepared by mixing. To the obtained water phase, an oil phase, a pH adjuster and other ingredients are added, and a cosmetic is obtained by stirring.

In addition, the cosmetic materials of the present invention include, for example, cosmetic makeup materials such as a makeup base and an emulsion foundation; sunscreen cosmetics such as sunscreen gels and sunscreen creams, and the like. The dosage system may be, for example, a gel, an emulsion, or a cream.

By using the water-in-oil type cosmetic material of the present invention, it does not stick, has a good feeling of use, and has high transparency. The dried coating film is still tightly adhered to the skin, so that it can obtain a uniform ultraviolet defense effect without Roughness. Therefore, it can be effectively used as an ultraviolet shielding agent that can be used daily. In addition, the use object of the cosmetic of the present invention is not limited to the face, but can also be applied to hands and feet.

As mentioned above, although embodiment of this invention was described, the following embodiment is mentioned further.

<1> An oil-based ultraviolet defense cosmetic containing the following components (A), (B), (C), (D), and (E): (A) from: p-methoxycinnamic acid-2- Ethylhexyl ester, 2,4,6-ginsane [4- (2-ethylhexyloxycarbonyl) aniline] -1,3,5-tris , 4-Third-Butyl-4'-methoxydibenzylidenemethane, Octocrylene, Dimethoxybenzylidenedioxyimidazolidinepropanoic acid-2-ethylhexyl Esters, diethylaminohydroxybenzoylhexyl benzoate, diethylhexyloxyphenol methoxyphenyltris 1 or 2 or more oil-soluble ultraviolet absorbents selected from methylenebisbenzotriazolyltetramethylbutylphenol, phenylbenzimidazolesulfonic acid, and diethyl benzylmalonate (B) an oil agent in a liquid state at 20 ° C (except for component (A)); (C) a dextrin fatty acid ester; (D) 0.5% by mass or more and 2% by mass or less of hydrophobic silica; and (E) A water-soluble polymer having a structural unit derived from (meth) acrylic acid or sulfonic acid.

<2> The oil-in-water type UV defense cosmetic according to <1>, wherein the component (A) preferably contains at least 2-ethylhexyl p-methoxycinnamate and diethylaminohydroxybenzoate Two types, such as hexyl benzoate, more preferably contain at least 2-ethylhexyl p-methoxycinnamic acid, hexyl diethylaminobenzyl benzoate, 2,4,6-paraben [4- (2-ethylhexyloxycarbonyl) aniline] -1,3,5-tri , And diethylhexyloxyphenol methoxyphenyltris Wait for 4 kinds.

<3> The oil-in-water UV-protective cosmetic according to <1> or <2>, wherein the content of the component (A) is preferably 0.6% by mass or more, and more preferably 2% by mass relative to the entire cosmetic. % Or more, 5% by mass or more, 8% by mass or better, 30% by mass or less, 25% by mass or less, 18% by mass or less, 16% by mass or better the following.

<4> The oil-in-water type UV defense cosmetic according to any one of <1> to <3>, wherein the content of the component (A) in the total amount of the ultraviolet absorber in the cosmetic is preferably 90% by mass or more, more preferably 95% by mass or more.

<5> The oil-in-water type ultraviolet defense cosmetic according to any one of <1> to <4>, wherein the component (B) contains: (B1) an ester oil in a liquid state at 20 ° C, (B2) ) Polysilicone oil that is liquid at 20 ° C, or (B3) one or two selected from hydrocarbon oils that are liquid at 20 ° C, ether oils with HLB less than 1, higher fatty acids, and higher alcohols The above oil agent preferably contains at least (B1) or (B2), and more preferably contains (B1) and (B2).

<6> The oil-in-water type UV defense cosmetic according to any one of <1> to <5>, wherein the content of the component (B) is preferably 0.5% by mass or more, more preferably 1% by mass or more, Extra-high quality is 2% by mass or more, preferably 12% by weight or less, more preferably 8% by mass or less, and particularly preferably 7% by mass or less.

<7> The oil-in-water type UV defense cosmetic according to any one of <1> to <6>, wherein the component (C) is an ester of a fatty acid and dextrin; the carbon number of the fatty acid is preferably 8 to 24. The more preferable carbon number is 14 to 18. The above-mentioned fatty acids are linear or branched saturated or unsaturated fatty acids. The average degree of polymerization of the dextrin is preferably 10 to 50, and more preferably 20 to 30.

<8> The oil-in-water type UV defense cosmetic according to any one of <1> to <7>, wherein the component (C) is palmitic acid dextrin, palmitic acid / 2-ethylhexanoic acid dextrin , Stearic acid dextrin, palmitic acid / stearic acid dextrin, oleic acid dextrin, isopalmitic acid dextrin, isostearic acid dextrin, and myristic acid dextrin are selected from one or two or more.

<9> The oil-in-water UV-protective cosmetic according to any one of <1> to <8>, wherein the content of the component (C) is preferably 0.2% by mass or more, and more preferably 0.3% by mass or more , Extra good line is 0.4 mass% or more, optimal line is 0.6 mass% or more, and preferably 1.5 mass% or less, more preferably 1 mass% or less, extra good line 0.7 mass% or less, and optimal line 0.6 mass% or less.

<10> The oil-in-water type UV defense cosmetic according to any one of <1> to <9>, wherein the mass ratio of the component (A) and the component (B) to the component (C) ((A + B) / C), preferably 10 or more, more preferably 20 or more, and more preferably 30 or more, and preferably 90 or less, more preferably 60 or less, and 50 or more.

<11> The oil-in-water UV-protective cosmetic according to any one of <1> to <10>, wherein the hydrophobic treatment of the component (D) is a dimethylsilylation treatment and a trimethylsilyl treatment Treatment, dimethylpolysiloxane treatment, dimethylsilane treatment, gum alkyl silylation treatment, alkyl silylation treatment, or methacryl silylation treatment, preferably dimethyl Silicone treatment.

<12> The oil-in-water UV-protective cosmetic according to any one of <1> to <11>, wherein the average primary particle diameter of the component (D) is preferably 5 nm to 50 nm, and more preferably 5 nm to 30 nm , Special good line 5nm ~ 20nm.

<13> The oil-in-water type UV defense cosmetic according to any one of <1> to <12>, wherein the content of the component (D) is 0.5% by mass or more, preferably 0.7% by mass or more, more The good line is 0.8 mass% or more, and is 2 mass% or less, preferably 1.5 mass% or less, and more preferably 1.3 mass% or less.

<14> The oil-in-water UV-protective cosmetic according to any one of <1> to <13>, wherein the mass ratio of the total of the components (A) and (B) to the component (D) ((A + B) / D), preferably 8 or more, 12 or more, 15 or more, and 40 or less, 35 or more, 30 or more, or 22 or more or better.

<15> The oil-in-water UV-protective cosmetic according to any one of <1> to <14>, wherein the component (E) is selected from methacrylic acid, acrylic acid, methacrylic acid ester, acrylic acid ester, and formazan Homoacrylamide and homopolymer selected from the monomers selected from acrylamide as constituent units, or a copolymer containing two or more of these monomers, and stearyl PG hydroxyethyl cellulose One or more selected from Na sulfonic acid.

<16> The oil-in-water type ultraviolet shielding cosmetic according to any one of <1> or <15>, wherein the component (E) is a carboxyvinyl polymer or acrylic acid. Copolymer of alkyl methacrylate, polypropylene amidamine, (acrylic acid Na / acryl methyl dimethyl taurine Na) copolymer, (hydroxyethyl acrylate / acryl methyl dimethyl taurine Na) copolymer Polymers, (acrylamide / ammonium acrylate) copolymers, and water-soluble polymers selected from polyacrylate-13.

<17> The oil-in-water type UV defense cosmetic according to any one of <1> to <16>, wherein the content of the component (E) is preferably 0.02% by mass or more, more preferably 0.15% by mass or more It is preferably 1.0% by mass or less, and more preferably 0.8% by mass or less.

<18> The oil-in-water UV protection cosmetic according to any one of <1> to <17>, further comprising one or two selected from the group consisting of a surfactant, a pH adjuster, and water. the above.

<19> The oil-in-water type UV defense cosmetic according to any one of <1> to <18>, wherein the dosage form is selected from a gel, an emulsion, and a cream.

<20> A method of using an oil-in-water type UV-defense cosmetic material, comprising the steps of applying the oil-in-water type UV-defense cosmetic material described in any one of <1> to <19> above, to the skin, The best line includes steps to apply on scalp, face, body, hands and feet.

<21> A method for protecting against ultraviolet rays, comprising the step of applying the oil-in-water type ultraviolet shielding cosmetic according to any one of <1> to <19> on the skin.

    [Example]    

Next, the present invention will be described in more detail with examples.

(Examples 1 to 26 and Comparative Examples 1 to 7)

Manufacture of oil-in-water UV-protective cosmetics (sunscreen cosmetics) with the composition shown in Tables 1 to 3, and the UV-protective effect, the transparency of the preparation, the degree of non-roughness when dry, and the continuity of the skin's close feeling Evaluation. The results are shown in Tables 1 to 3.

(Manufacturing method of cosmetics)

At 25 ° C., in a mixing tank filled with water, component (E) or a surfactant according to demand is added while stirring to prepare an aqueous phase. On the other hand, the component (A) and the component (B) are heated and stirred at 80 ° C., and the component (C) and the component (D) are further added to prepare an oil phase. Then, to the obtained water phase, the above-mentioned oil phase and other components such as a pH adjuster according to requirements are added, and the mixture is stirred at 25 ° C. to obtain a water-in-oil type sunscreen cosmetic described in each table. In addition, instead of the component (D), untreated silicic acid anhydride and titanium oxide may be used instead.

UV protection effect (SPF value)

On the PMMA board, apply the cosmetic material evenly at a concentration of 1.4 mg / cm ² for 1 minute and dry it in a cool place for 15 minutes. After the sample was dried, a SPF analyzer (UV2000S, manufactured by Labsphere, USA) was used to measure the transmittance of the absorption spectrum (wavelength 350 nm) for a total of 9 places on the square PMMA plate, the midpoint, each vertex, and the midpoint of each vertex line. (%), Find the average of 9 places. As a result, the SPF value (-) was obtained from the transmittance (%), as shown in the table.

Transparency of formulation (visible light transmittance)

On black artificial leather (manufactured by Okamoto Shinwa Co., Ltd.), the cosmetic was uniformly applied for 1 minute so as to be 2 mg / cm ² , and dried in a cool place for 15 minutes. After the sample was dried, the lightness of the coating film was measured using a spectrophotometer (CM-2002, manufactured by MINOLTA), and an average of five places was determined. The results are reported in the table according to the following criteria.

5 Brightness below 25

4 Brightness 25 or more and less than 30

3 Lightness above 30 and less than 35

2 Lightness above 35 and less than 40

1 Lightness above 40

Degree of coarseness without drying

Three professional reviewers applied 0.02 mL of cosmetic material to a circle with a diameter of 3 cm on the inside of the forearm. Sensory evaluation was performed for the rough feeling during drying. The standard is divided into 5 stages. When the feeling of coarseness is not felt at all, it is rated as "5", and when the feeling of coarseness is strongly felt, it is rated as "1". Results The average of 3 reviewers is recorded in the table.

Maintains a close feel to the skin

Three professional examiners applied 0.02 mL of cosmetic material to a 3 cm diameter circle on the inside of the forearm. The sensory evaluation was performed on the skin-tight feeling of the preparation after 5 minutes, 10 minutes, 15 minutes, 20 minutes, and 25 minutes after application. The evaluation criteria are divided into the following four stages. As a result, the average of the three reviewers is recorded in the table.

5 After 25 minutes, feel tight.

4 Although a tight feeling was felt after 15 minutes, no tight feeling was felt after 20 minutes.

3 Although a tight feeling was felt after 10 minutes, it was not felt after 15 minutes.

Although a tight feeling was felt after 5 minutes, the tight feeling was not felt after 10 minutes.

After 15 minutes, no tight feeling was felt.

* 1: 2-Ethylhexyl p-methoxycinnamic acid (Uvinul MC80, manufactured by BASF) * 2: 2- [4- (diethylamino) -2-hydroxybenzyl) benzoic acid Esters (Uvinul A PLUS GRANULAR, manufactured by BASF) * 3: 2,4-bis [{4- (2-ethylhexyloxy) -2-hydroxy} -phenyl] -6- (4-methoxybenzene Base) -1,3,5-tri (Tinosorb S, manufactured by BASF) * 4: 2,4,6-ginseng [4- (2-ethylhexyloxycarbonyl) aniline] -1,3,5-tris (Uvinul T-150, manufactured by BASF) * 5: alkyl benzoate (C12-C15) (Finsolv TN, manufactured by Innospec Active Chemicals LLC) * 6: methyl polysiloxane (polysiloxane KF-96A -10CS, manufactured by Shin-Etsu Chemical Co., Ltd.) * 7: liquid isoalkane (PARLEAM EX, manufactured by Nippon Oil Co., Ltd.) * 8: palmitic dextrin (RHEOPEARL KL2, manufactured by Chiba Milling Corporation) * 9: myristic acid dextrin (RHEOPEARL MKL2 (Manufactured by Chiba Milling Co., Ltd.) * 10: dimethyl silylated silicic anhydride (silica R972, particle size 16nm, manufactured by Japan Silica) * 11: trimethyl silylated silicic acid (silica RX200, Particle size: 12nm, manufactured by Japan Silica Co., Ltd.) * 12: Trimethylsilylated silicic acid anhydride (Silica RX50, particle size: 30nm, manufactured by Japan Silica Co., Ltd.) * 13: Dimethylpolysiloxane treated silicic acid anhydride (Silica RY200, particle size 12nm, manufactured by Japan Silica) * 14: alkyl silylated silicic anhydride (silica R805, particle size 12nm, manufactured by Japan Silica) * 15: Silicic anhydride (Silicon 200 , Particle size 12nm, manufactured by Japan Silica Co.) * 16: fine particles of titanium oxide. Aluminum hydroxide. Stearic acid mixture (MT-100TV, manufactured by TAYCA) * 17: acrylic acid. Alkyl methacrylate copolymer (PEMULEN TR-1, manufactured by Lubrizol) * 18: acrylic acid. Alkyl methacrylate copolymer (PEMULEN TR-2, manufactured by Lubrizol) * 19: Sodium acrylate. Acrylic acid dimethyl sodium taurate copolymer / isohexadecane / polysorbate 80 / purified water (SIMULGEL EG (37.5% / 22.5% / 7.5% / 32.5%), manufactured by SEPPIC) * 20 : 2-amino-2-methyl-1-propanol (AMP-ULTRA PC1000, manufactured by ANGUS Chemical Company) * 21: polyoxyethylene-2-hexyldecyl ether (EMULGEN 1620G, manufactured by Kao Corporation)

As can be seen from Tables 1 to 3, the oil-in-water UV-protective cosmetic preparations containing the components (A), (B), (C), (D), and (E) are transparent and have no rough skin when dry. The astringent feeling and the adhesion to the skin continue, and the UV protection effect is also good. On the other hand, the component (C) and the component (D) do not contain one or neither of the components, and the component (D) is a composition other than the hydrophobic silica, and the component (D) contains Compositions with an amount exceeding 0.5% by mass and less than 2% by mass have poor evaluations of any of the related transparency, coarseness, adhesion, and UV protection effect, and are not good UV protection cosmetics .

Claims (5)

An oil-in-water UV-protective cosmetic containing the following ingredients (A), (B), (C), (D), and (E): (A) from: p-methoxycinnamic acid-2-ethyl Hexyl ester, 2,4,6-ginsane [4- (2-ethylhexyloxycarbonyl) aniline] -1,3,5-tris , 4-Third-Butyl-4'-methoxydibenzylidenemethane, Octocrylene, Dimethoxybenzylidenedioxyimidazolidinepropanoic acid-2-ethylhexyl Esters, diethylaminohydroxybenzoylhexyl benzoate, diethylhexyloxyphenol methoxyphenyltris 1 or 2 or more oil-soluble ultraviolet absorbents selected from methylenebisbenzotriazolyltetramethylbutylphenol, phenylbenzimidazolesulfonic acid, and diethyl benzylmalonate (B) an oil agent in a liquid state at 20 ° C (except for component (A)); (C) a dextrin fatty acid ester; (D) 0.5% by mass or more and 2% by mass or less of hydrophobic silica; E) A water-soluble polymer having a structural unit derived from (meth) acrylic acid or sulfonic acid.     For example, the oil-in-water UV-protective cosmetic of claim 1, wherein the hydrophobic treatment of the component (D) is dimethyl silylation treatment, trimethyl silylation treatment, dimethyl polysiloxane treatment, Methylsilane treatment, amine alkyl silylation treatment, alkyl silylation treatment, or methacryl silylation treatment.         For example, the oil-in-water UV-protective cosmetic of claim 1, wherein the mass ratio of the total of the components (A) and (B) to the component (D) ((A + B) / D) is 8 or more and 40 or less .         For example, the oil-in-water UV-protective cosmetic of claim 1, wherein the mass ratio of the total of the components (A) and (B) to the component (C) ((A + B) / C) is 10 or more and 90 or less .         For example, the oil-in-water UV-protective cosmetic of claim 1, wherein the average primary particle diameter of the component (D) is 5 to 50 nm.