JP6998635B2 - Sunscreen cosmetics - Google Patents

Description

The present invention relates to a sunscreen cosmetic having an improved UV protection index (SPF).

Skin that has been exposed to excessive ultraviolet rays may form erythema or blisters, promote melanin production and turn black, and may cause decreased elasticity and wrinkles. Therefore, various sunscreen cosmetics have been developed to protect the skin from UV rays. UV protection agents blended in sunscreen cosmetics include inorganic UV scattering agents such as zinc oxide and titanium oxide, and organic UV absorbers such as 2-ethylhexyl paramethoxycinnamate. Since the former mainly reflects ultraviolet rays, white residue on the applied skin is unavoidable, and an unfavorable feeling of use due to squeaks or the like is attached. On the other hand, the latter has the advantage that it does not turn white because it absorbs ultraviolet rays, but if it is added in a large amount, it may give an oily feeling and stickiness, and may cause problems on skin safety.

The organic ultraviolet absorber differs depending on the wavelength to be absorbed, depending on whether it is compatible with either one or both of the UV-A region (320 nm to 400 nm) and the UV-B region (290 nm to 320 nm). Not only the blending amount of the organic UV absorber in the above, but also the type of the UV absorber is important. For sunscreen cosmetics containing an organic UV absorber, it is also important to appropriately select an oil agent or a surfactant according to the characteristics of the organic UV absorber to improve the usability. ..

Patent Document 1 describes octocrylene, bisethylhexyloxyphenol methoxyphenyltriazine, diethylaminohydroxybenzoyl hexyl benzoate and hexyl benzoate for the purpose of corresponding to the UV-A region (320 nm to 400 nm) and the UV-B region (290 nm to 320 nm). Disclosed is an oil-in-water emulsified cosmetic containing an organic ultraviolet absorber composed of four types of 4-tert-butyl-4'-methoxydibenzoylmethane.

Japanese Patent No. 5697198

Here, in the oil-in-water emulsified cosmetic described in Patent Document 1, the blending amount of the organic ultraviolet absorber, the surfactant, etc. is also specified so that the four types of organic ultraviolet absorbers do not separate from water. ing. However, in the oil-in-water emulsified cosmetic, it is necessary to further uniformly disperse the emulsified organic ultraviolet absorber in the formulation to promote the efficacy of the organic ultraviolet absorber as an active ingredient. In this respect, the oil-in-water emulsified cosmetic described in Patent Document 1 only improves the usability, and there is no mention of that point.

Therefore, the present invention has been made in view of the above problems, and by combining one or more kinds of organic ultraviolet absorbers and further blending hydrophobized anhydrous silicic acid, the ultraviolet protection effect is promoted. It is an object of the present invention to provide a sunscreen cosmetic having excellent usability and safety and having an excellent ultraviolet protection effect.

The inventor of the present invention has conducted diligent research in view of the above problems. As a result, the following components (a) to (d); (a) one or more kinds of organic ultraviolet absorbers, (b) hydrophobized anhydrous silicic acid, (c) surfactant, (d) oil agent. , The present invention has been completed by finding that the above-mentioned problems can be solved by the sunscreen cosmetics contained therein.

(1) The first aspect of the present invention is a sunscreen cosmetic, which comprises the following components (a) to (d); (a) one or more organic ultraviolet absorbers, (b) hydrophobic treatment. A sunscreen cosmetic containing (c) a surfactant and (d) an oil.
(2) The sunscreen cosmetic of (1) may be an oil-in-water emulsified sunscreen cosmetic.
(3) In the sunscreen cosmetics of (1) or (2), (a) one or more kinds of organic ultraviolet absorbers may contain at least a silicone-based ultraviolet absorber.
(4) In the sunscreen cosmetic of (3), the silicone-based ultraviolet absorber may be dimethicodiethylbenzalmalonate.
(5) In the sunscreen cosmetics according to any one of (1) to (4), the average diameter of the primary particles of (b) hydrophobized anhydrous silicic acid is 6.5 nm or more and 12.4 nm or less, and BET. The specific surface area according to the method may be 125 m ² / g or more and 265 m ² / g or less.
(6) The sunscreen cosmetic according to any one of (1) to (5) may further contain (e) a water-soluble polymer and (f) water.

The sunscreen cosmetic of the present invention contains (a) one or more kinds of organic ultraviolet absorbers, (b) hydrophobicized anhydrous silicic acid, (c) surfactant, and (d) oil. It is a cosmetic. This makes it easier for the organic UV absorber to be evenly dispersed in the formulation, which promotes the UV protection effect, and makes the sunscreen cosmetics excellent in usability and safety, and also in the UV protection effect. Can be done.

It is a figure which summarized the evaluation result of SPF in Examples 4 to 7 and Comparative Examples 1 to 4.

Hereinafter, the present invention will be described in detail, but these are listed for the purpose of exemplification, and the present invention is not limited thereto.

[Sunscreen cosmetics]
The sunscreen cosmetic of the present invention contains (a) one or more kinds of organic ultraviolet absorbers, (b) hydrophobicized anhydrous silicic acid, (c) surfactant, and (d) oil agent.

The sunscreen cosmetic of the present invention may be any of an oil-in-water emulsified sunscreen cosmetic, a water-in-oil emulsified sunscreen cosmetic, and a solubilized sunscreen cosmetic, but the oil-in-water emulsified sunscreen. It is preferably a cosmetic. As a result, it is possible to obtain a sunscreen cosmetic that does not have an unfavorable appearance problem such as white residue and an unfavorable feeling of use such as squeak.

[Organic UV absorber]
(A) It is preferable that one or more kinds of organic ultraviolet absorbers are blended, two or more kinds and six kinds or less are blended, and it is more preferable that three or more kinds and five kinds or less are blended. By blending one or more kinds of organic ultraviolet absorbers in combination, the corresponding wavelengths are absorbed in the UV-A region (320 nm to 400 nm) and the UV-B region (290 nm to 320 nm) having different wavelength bands. A plurality of organic UV absorbers can be selected to obtain a sunscreen cosmetic having an excellent UV protection effect.

From the viewpoint of usability, safety and UV protection effect, the sunscreen cosmetic of the present invention contains (a) one or more kinds of organic UV absorbers in an amount of 5% by mass or more and 30% by mass or less. It is preferably contained in an amount of 10% by mass or more and 20% by mass or less. Here, if a large amount of an organic UV absorber is added to the sunscreen cosmetics, the UV protection effect is promoted, but the oily feeling and stickiness appear, which causes a problem of usability and safety to the skin. Problems may also occur. In this regard, according to the sunscreen cosmetic of the present invention, since the hydrophobized anhydrous silicic acid is blended, the organic UV absorber is uniformly dispersed in the formulation without adding a large amount of the organic UV absorber. Can be made to. Therefore, even if the organic UV absorber is within the above numerical range, the UV protection effect can be promoted, and the sunscreen cosmetics having excellent usability and safety and having an excellent UV protection effect can be obtained. can.

(A) One or more kinds of organic UV absorbers preferably contain at least a silicone-based UV absorber, and the silicone-based UV absorbers are preferably dimethicodiethylbenzalmalonate. As a result, it absorbs ultraviolet rays and also serves as a protective film on the surface of the sunscreen cosmetic after application, so that the sunscreen cosmetic having a high SPF can be obtained.

From the viewpoint of effectiveness and usability, the sunscreen cosmetic of the present invention preferably contains a silicone-based ultraviolet absorber in an amount of 0.5% by mass or more and 5% by mass or less, and 1% by mass. It is more preferable to contain% or more and 3% by mass or less.

(A) One or more kinds of organic ultraviolet absorbers are (a-1) benzalmalonate derivative, (a-2) silicic acid derivative, (a-3) paraaminobenzoic acid derivative, (a-4). Triazine derivative, (a-5) salicylic acid derivative, (a-6) β, β-diphenylacrylate derivative, (a-7) benzophenone derivative, (a-8) benzilidenshonow derivative, (a-9) phenylbenzoimidazole derivative , (A-10) anthranil derivative, (a-11) imidazoline derivative, (a-12) 4,4-diarylbutadiene derivative, (a-13) benzoyl derivative, (a-14) other organic ultraviolet absorbers. Can be used as appropriate.

(A-1) Benzalmalonate Derivative The benzalmalonate derivative is preferably a polyorganosiloxane having a benzalmalonate functional group, and more preferably dimethicodiethylbenzalmalonate. As the dimethicodiethylbenzalmalonate, for example, trade name: Pulsol SLX (manufacturing company: DSM) can be preferably used.

(A-2) Cinnamic acid derivative The cinnamic acid derivative is paramethoxycinnamate 2-ethylhexyl (for example, trade name: ubinal MC80, manufacturing company: BASF, trade name: Pulsol MCX, manufacturing company: DSM). ), Isoamyl methoxycinnamate, Isoamyl methoxycinnamate (for example, trade name: Neo Heliopan E1000, manufacturer: Herman & Lymer), cinnoxate, DEA methoxycinnamate, diisopropyl methyl silicate, glyceryl-ethyl Hexanoate-dimethoxycinnamate and the like can be appropriately used, and 2-ethylhexyl paramethoxycinnamate is preferable.

(A-3) Para-aminobenzoic acid derivative The para-aminobenzoic acid derivative is para-aminobenzoic acid (PABA), ethyl para-aminobenzoate (ethyl PABA), 4- [N, N-di (3-hydroxypropyl) amino] ethyl benzoate. , Para-dimethylaminobenzoic acid amyl (dimethylPABA amyl), para-dimethylaminobenzoic acid 2-ethylhexyl (dimethylPABA ethylhexyl) (for example, trade name: Escalol 507, manufacturing company: ISP), paraaminobenzoic acid glyceryl (glyceryl PABA) ), PEG-25-aminobenzoic acid (for example, trade name: ubinal P25, manufacturing company: BASF), 2- [4- (diethylamino) -2-hydroxybenzoyl] benzoic acid hexyl ester (for example, trade name: ubinal). A Plus Granular (manufacturing company: BASF) and the like can be appropriately used, and 2- [4- (diethylamino) -2-hydroxybenzoyl] benzoic acid hexyl ester is preferable.

(A-4) Triazine Derivatives The triazine derivative is ethylhexyltriazone (2,4,6-tris [4- (2-ethylhexyloxycarbonyl) anilino] -1,3,5-triazine) (for example, trade name: ubinar). T-150, manufacturing company: BASF), diethylhexylbutamidotriazine (for example, trade name: Uvasorb HEB, manufacturing company: 3V Sigma), 2,4,6-tris (diisobutyl-4'-aminobenzal) Malonate) -S-triazine, bisethylhexyloxyphenol methoxyphenyl triazine (2,4-bis- [{4- (2-ethylhexyloxy) -2-hydroxy} -phenyl] -6- (4-methoxyphenyl)- 1,3,5-triazine) (for example, trade name: Tinosorb S, manufacturing company: BASF), trisbiphenyltriazine (for example, trade name: Tinosorb A2B, manufacturing company: BASF) and the like can be appropriately used. Ethylhexyltriazones and bisethylhexyloxyphenol methoxyphenyltriazine are preferred.

(A-5) Salicylic acid derivative The salicylic acid derivative is Homosalate (for example, trade name: Eusolex HMS, manufacturing company: Merck), ethylhexyl salicylate (for example, trade name: Neo Heliopan OS, manufacturing company:). Herman & Lymer Co., Ltd.) and the like can be used as appropriate.

(A-6) β, β-diphenylacrylate derivative The β, β-diphenylacrylate derivative is octocrylene (for example, trade name: Ubinal N539 T, manufacturing company: BASF, trade name: Pulsol 340, manufacturing company: DSM). ) Etc. can be used as appropriate.

(A-7) Benzophenone Derivatives Benzophenone derivatives include benzophenone-1 (for example, trade name: Ubinal 400, manufacturing company: BASF), benzophenone-2 (for example, trade name: Ubinal D50, manufacturing company: BASF), benzophenone. -3 (oxybenzone) (for example, trade name: Ubinal M40, manufacturing company: BASF), benzophenone-4 (for example, trade name: Ubinal MS40, manufacturing company: BASF), benzophenone-5, benzophenone-6 (for example, for example). Product name: Helisorb 11, Manufacturing company: Norquoy, Benzophenone-8 (eg, Product name: Spectra-Soap UV-24, Manufacturing company: American Cyanamide, Benzophenone-9 (eg, eg) Ubinal DS-49, manufacturing company: BASF), benzophenone-12 and the like can be appropriately used.

(A-8) Benzylidene Demonstrate Derivatives are 3-benzylidene sulphonate (for example, trade name: Mexoryl SD, manufacturer: Chimex), 4-venzylidene sulphonic acid, benzylidene sulphonic acid (eg, benzylidene sulphonic acid). , Product name: Megizolyl SL, Manufacturing company: Simex), Metosulfate benzalconium (for example, Product name: Megizolyl SO, Manufacturing company: Simex), Tereftalidrenzylidene sulfonic acid (For example, product name: Megizolyl) SX, manufacturing company: Simex), polyacrylamide methylbenzylideneshow (for example, trade name: megizolyl SW, manufacturing company: Simex) and the like can be appropriately used.

(A-9) phenylbenzimidazole derivative The phenylbenzimidazole derivative is phenylbenzoimidazole sulfonic acid (for example, trade name: Eusolex 232, manufacturer: Merck), phenyldibenzoimidazole disodium tetrasulfonate (trade name: Neo-. Heliopan AP, manufacturing company: Herman and Reimer, etc.) can be used as appropriate.

(A-10) Anthranilic Derivative As the anthranil derivative, menthyl anthranilate (for example, trade name: Neo Heliopan MA, manufacturing company: Harman & Lymer) or the like can be appropriately used.

(A-11) Imidazolines Derivative As the imidazoline derivative, ethylhexyldimethoxybenzylidene dioxoimidazolin propionate or the like can be appropriately used.

(A-12) 4,4-Diarylbutadiene Derivative As the 4,4-diarylbutadiene derivative, 1,1-dicarboxy (2,2'-dimethylpropyl) -4,4-diphenylbutadiene or the like can be appropriately used. ..

(A-13) Benzoyl Derivative As the benzoyl derivative, 4-tert-butyl-4'-methoxy-dibenzoylmethane (for example, trade name: Pulsol 1789, manufacturing company: DSM) or the like can be appropriately used.

(A-14) Other Organic UV Absorbers Other organic UV absorbers include 2,2'-methylenebis [6- (2H benzotriazole-2-yl) -4- (1,1,3,3). -Tetramethylbutyl) phenol] (for example, trade name: Tinosorb M, manufacturing company: BASF) and the like can be appropriately used.

Among the organic ultraviolet absorbers (a-1) to (a-14), one or more kinds of organic ultraviolet absorbers include (a-1) benzalmaronate derivative and (a-2) silicate skin acid. It is preferably 3 or more and 5 or less organic ultraviolet absorbers selected from derivatives, (a-3) paraaminobenzoic acid derivatives, and (a-4) triazine derivatives, and (a-1) benzalmalonate derivatives. Is more preferably dimethicodiethylbenzalmalonate, (a-2) the silicic acid derivative is more preferably paramethoxysilicate 2-ethylhexyl, and (a-3) the paraaminobenzoic acid derivative is. 2- [4- (diethylamino) -2-hydroxybenzoyl] benzoic acid hexyl ester is more preferable, and the (a-4) triazine derivative is more preferably ethylhexyltriazone and bisethylhexyloxyphenol methoxyphenyltriazine. ..

When (a-2) cinnamic acid derivative is blended, the sunscreen cosmetic of the present invention contains (a-2) cinnamic acid derivative in the whole amount from the viewpoint of ultraviolet protection effect, safety and usability. It is preferably contained in an amount of 3% by mass or more and 12% by mass or less, and more preferably 5% by mass or more and 10% by mass or less.

Further, when the (a-3) para-aminobenzoic acid derivative is blended, the sunscreen cosmetic of the present invention contains (a-3) para-aminobenzoic acid in the whole amount from the viewpoint of ultraviolet protection effect, safety and usability. The derivative is preferably contained in an amount of 0.5% by mass or more and 5% by mass or less, and more preferably 1% by mass or more and 3% by mass or less.

Further, when the (a-4) triazine derivative is blended, the sunscreen cosmetic of the present invention contains 1 (a-4) triazine derivative in the total amount from the viewpoint of ultraviolet protection effect, safety and usability. It is preferably contained in an amount of 1% by mass or more and 10% by mass or less, and more preferably 1% by mass or more and 5% by mass or less. When ethylhexyltriazone is blended, it is more preferably contained in an amount of 0.5% by mass or more and 5% by mass or less, particularly preferably 1% by mass or more and 2% by mass or less, and bisethylhexyloxyphenol methoxyphenyltriazine. When blended, it is more preferably contained in an amount of 0.5% by mass or more and 5% by mass or less, and particularly preferably 1% by mass or more and 3% by mass or less.

[Hydrophobic treatment anhydrous silicic acid]
The sunscreen cosmetic of the present invention contains (b) hydrophobized anhydrous silicic acid. Dispersing hydrophobized anhydrous silicic acid in cosmetics makes it easier to evenly disperse organic UV absorbers in the formulation, so even if a large amount of organic UV absorbers is not added, the UV protection effect can be achieved. It can be promoted, and it can be a sunscreen cosmetic having excellent usability and safety, and also having an excellent ultraviolet protection effect.

(B) Hydrophobization Treatment In silicic acid anhydride, the average diameter of the primary particles is preferably 6.5 nm or more and 12.4 nm or less, and the specific surface area by the BET method is preferably 125 m ² / g or more and 265 m ² / g or less. .. This makes it possible to obtain a sunscreen cosmetic having better dispersibility of the organic ultraviolet absorber.

From the viewpoint of dispersibility and usability, the sunscreen cosmetic of the present invention preferably contains (b) hydrophobicized anhydrous silicic acid in an amount of 0.1% by mass or more and 3% by mass or less, and is 0. It is more preferable to contain 0.25% by mass or more and 1.5% by mass or less.

(B) Hydrophobicization Treatment The average diameter of the primary particles of silicic acid anhydride is more preferably 11.5 nm or more and 12.4 nm or less from the viewpoint of dispersibility. Further, the specific surface area by the BET method is more preferably 125 m ² / g or more and 190 m ² / g or less, further preferably 131 m ² / g or more and 190 m ² / g or less, and 150 m from the viewpoint of dispersibility. It is particularly preferable that it is ² / g or more and 190 m ² / g or less. As the hydrophobized anhydrous silicic acid in the above numerical range, for example, trade names: AEROSIL R974, AEROSIL R976, AEROSIL R805 (manufacturing company: Nippon Aerosil Co., Ltd.) and the like can be appropriately used, and AEROSIL R974 is particularly preferable.

Further, the (b) hydrophobized anhydrous silicic acid is preferably silylated anhydrous silicic acid.

Further, the mass ratio (a: b) of (a) one or more kinds of organic ultraviolet absorbers and (b) hydrophobized anhydrous silicic acid is preferably 20: 1 to 5: 1. More preferably, it is 15: 1 to 10: 1.

[Surfactant]
(C) The surfactant is preferably an anionic surfactant or a nonionic surfactant, or a combination of an anionic surfactant and a nonionic surfactant. As the anionic surfactant, amino acid-based surfactants such as sodium dilauroyl glutamate (for example, trade name: Pericea, manufacturing company: Asahi Kasei Chemicals Co., Ltd.), sodium stearoyl glutamate and the like can be appropriately used, and dilauroyl glutamic acid can be used as appropriate. It is preferably sodium lysine. Nonionic surfactants include polyoxyethylene sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, and polyoxy. Ethylene sorbitan fatty acid ester, polyoxyethylene fatty acid monoalkanolamide, polyoxyethylene fatty acid dialkanolamide, and the like can be appropriately used.

The surfactants (c) are sodium dilauroyl glutamate lysine, polyglyceryl-3 methylglucose distearate, glyceryl stearate, polyoxyethylene sorbitan monostearate (polysorbate 60), and polyoxyethylene sorbitan tristearate (polysorbate 65). ), It is more preferable to use one or two selected from polyoxyethylene sorbitan oleate (polysorbate 80).

From the viewpoint of emulsification and stability of the organic ultraviolet absorber, the sunscreen cosmetic of the present invention preferably contains a surfactant in an amount of 0.05% by mass or more and 5% by mass or less. It is more preferable to contain 1% by mass or more and 2% by mass or less.

[Oil]
(D) As the oil agent, silicone oil, hydrocarbon oil, ester oil, ether oil, fluorine oil and the like can be appropriately used.

As the silicone oil, linear polyorganosiloxane, cyclic polysiloxane, or the like can be appropriately used. The linear polyorganosiloxane includes a linear alkylpolysiloxane having an alkyl group having 1 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms and an aryl group having 6 to 10 carbon atoms. A linear alkylarylpolysiloxane or the like can be appropriately used, and specifically, a linear dimethylpolysiloxane, a linear methylphenylpolysiloxane or the like can be appropriately used. Among these linear polyorganosiloxanes, the viscosity at 20 ° C. is preferably 1 mPa · s or more and 1000 mPa · s or less, and more preferably 5 mPa · s or more and 10 mPa · s or less. As the cyclic polysiloxane, a 4- to 6-membered cyclic siloxane having an alkyl group having 1 to 5 carbon atoms as a substituent can be appropriately used. Specifically, octamethylcyclotetrasiloxane and decamethylcyclopenta can be used. Siloxane or the like can be used as appropriate.

As the hydrocarbon oil, liquid paraffin, squalane, light liquid isoparaffin, heavy liquid isoparaffin, polybutene and the like can be appropriately used.

Ester oils include vegetable oils such as saflower oil, soybean oil, grape seed oil, sesame oil, wheat germ oil, avocado oil, olive oil, castor oil, macadamia nut oil, and medfoam oil; mink oil, turtle oil, liquid lanolin, etc. Animal oils of Fatal acid esters of higher alcohols such as dodecyl, cetyl 2-ethylhexanoate, isocetyl 2-ethylhexanate, isostearyl isostearate; oxyacid esters of higher alcohols such as diisostearyl malate, cetyl lactate; glyceryl tricaprylate, tri -2-ethylhexarate glyceryl, triisostearate glyceryl, tri (capril capric acid) glyceryl, diisopropyl sebacate, diethylhexyl sevacinate, dicaprylyl carbonate, propylene glycol dicaprylate, di (capril capric acid) propylene glycol, diisosteare As appropriate, fatty acid esters of polyhydric alcohols such as propylene glycol acid, neopentyl glycol dicaprate, diethylpentanediol dineopenate, methylpentanediol dineopenate, neopentyl glycol diethylhexanoate and the like can be used.

As the ether oil, cetyldimethylbutyl ether or the like can be appropriately used, and as the fluorine oil, perfluoropolyether, perfluorocarbon or the like can be appropriately used.

As other oils, fatty acids, sterols, waxes and the like can be appropriately used.

(D) The oil agent is preferably silicone oil, tri (caprylic capric acid) glyceryl, hydrogenated polyisobutene, or methylpentanediol dineopenate. Further, the sunscreen cosmetic of the present invention preferably contains (d) an oil agent in an amount of 0% by mass or more and 15% by mass or less, and more preferably 2% by mass or more and 7% by mass or less.

[Water-soluble polymer]
The sunscreen cosmetic of the present invention preferably contains (e) a water-soluble polymer in an amount of 0.2% by mass or more and 5% by mass or less, and 0.2% by mass or more and 1.0% by mass or less. It is more preferable to contain it.

(E) Examples of the water-soluble polymer include carboxyvinyl polymer, alkyl methacrylate copolymer, polyacrylic acid salt (for example, trade name: Acpec MG N40R, manufacturing company: Sumitomo Seika Co., Ltd.), (acryloyldimethyl). In addition to taurine ammonium / VP) copolymer, polyacrylamide, (Na acrylate / acryloyldimethyltaurin Na) copolymer, (hydroxyethyl acrylate / acryloyldimethyltaurin Na) copolymer, etc., cellulose thickeners, guar gum, pectin, purulan, etc. Gelatin, locust bean gum, carrageenan, agar, xanthan gum, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, bentonite, aluminum magnesium silicate, alginic acid, propylene glycol alginate, hyaluronic acid, sodium hyaluronate can be appropriately used. Further, it is more preferable to use a carboxyvinyl polymer, an acrylic acid / alkyl methacrylate copolymer or a polyacrylic acid salt.

〔water〕
The sunscreen cosmetic of the present invention preferably contains (f) water in an amount of 40% by mass or more and 95% by mass or less, and more preferably 60% by mass or more and 80% by mass or less.

In addition to the essential components (a) to (e) above, the sunscreen cosmetics of the present invention include components usually used in cosmetics, such as semi-solid oils, higher alcohols, and polyhydric alcohols (butylene glycol, dipropylene). Glycol etc.), pigments, vitamins, high molecular weight latex, ceramides, vitamins and the like can be appropriately contained. In addition, other active ingredients such as ultraviolet scattering component, astringent component, anti-inflammatory component, anti-aging component, whitening component, film agent (alkyl acrylate / dimethicone) copolymer, etc.), water repellent, and feel-enhancing powder (PMMA). Etc.), thickeners, moisturizers, drugs, plant extracts, blood circulation promoters, cooling sensitizers, antiperspirants, bactericides (ethanol, etc.), skin activators, pH regulators (sodium hydroxide, etc.), oxidation It can contain an inhibitor, a preservative (phenoxyethanol, paraoxybenzoic acid ester, etc.), a fragrance, and the like.

[Examples 1 to 4, Comparative Example 1]
The sunscreen cosmetics of the formulations shown in Table 1 were manufactured and evaluated for SPF, and the results are also shown in Table 1. In Examples 1 to 4, silylated anhydrous silicic acid (AEROSIL R974) was blended in the blending amounts shown in Table 1, and in Comparative Example 1, silylated anhydrous silicic acid (AEROSIL R974) was blended. Was not blended.

[SPF]
The SPF was measured using an SPF analyzer (UV-2000S manufactured by Labsphere), and each sample was applied to a PMMA plate at 1.3 mg / cm ² and air-dried for 15 minutes. The UV absorption spectra at 8 or more locations were detected and averaged to calculate the SPF.

[Examples 4 to 7, Comparative Example 1 to Comparative Example 4]
For Example 4 and Comparative Example 1, the sunscreen cosmetics formulated as described above were used. Further, in Examples 5 to 7 and Comparative Examples 2 to 4, a sunscreen containing the hydrophobized anhydrous silicic acid or anhydrous silicic acid shown in Table 2 and having the same formulation as in Example 4 for other components. Cosmetics were manufactured, SPF was evaluated, and the results are shown in FIG. Table 2 also shows the average diameter of the primary particles of the hydrophobically treated anhydrous silicic acid or anhydrous silicic acid in each Example / Comparative Example, the specific surface area by the BET method, the surface treatment, and the behavior with respect to water.

[Examples 8 to 13]
With respect to Examples 8 to 13, sunscreen cosmetics having the formulations shown in Table 3 were produced from the sunscreen cosmetics according to Example 4, mainly by appropriately changing surfactants, oils and the like, and SPF and The usability (non-stickiness) was evaluated, and the results are also shown in Table 3.

[Usage]
The feeling of use (non-stickiness) is whether or not there is stickiness when 30 μl of sunscreen cosmetics are placed on the skin of each of the eight panelists and lightly stretched with a finger within a circular area with a diameter of 5 cm. Was evaluated by. "-" If less than 2 people answered that there is no stickiness, "+" if 2 or more and less than 4 people, "++" if 4 or more and less than 6 people, 6 or more and 8 or less The case of is indicated by "+++".

[Examples 14 to 17]
With respect to Examples 14 to 17, from the sunscreen cosmetics according to Example 4, mainly the amount of the ultraviolet absorber was appropriately changed to produce sunscreen cosmetics having the formulations shown in Table 4, and SPF and the sunscreen cosmetics were produced. The usability (non-stickiness) was evaluated, and the results are also shown in Table 4.

As shown in Table 1, the sunscreen cosmetics according to Examples 1 to 4 containing 0.1% by mass or more and 3% by mass or less of hydrophobized anhydrous silicic acid were compared with Comparative Example 1 not containing SPF. Can be seen to be promoted.

Looking at the SPFs of Examples 1 to 4 and Comparative Example 1, the SPFs were 33.4, 43.0, 45.8, 63.7, and 24.5, respectively. This is the time when erythema appears on the skin when a general Japanese person is exposed to sunlight for about 20 minutes, which is 11.1 hours and 14.3 hours when converted by the formula of SPF value x 20 minutes ÷ 60, respectively. , 15.3 hours, 21.2 hours, 8.2 hours. Therefore, the sunscreen cosmetics of Examples 1 to 3 can be expected to prolong the time for erythema to appear on the skin for about half a day or more, and the sunscreen cosmetics of Example 4 for about one day, which is excellent. It can be seen that a sunscreen effect can be expected.

As shown in Table 2 and FIG. 1, the average diameter of the primary particles is 6.5 nm or more and 12.4 nm or less, and the specific surface area by the BET method is 125 m ² / g or more and 265 m ² / g or less. It can be seen that the sunscreen cosmetics according to Examples 4 to 7 containing silicic acid promote SPF as compared with Comparative Example 1 containing no silicic acid. Further, the sunscreen cosmetic according to Comparative Example 2 contains hydrophobized anhydrous silicic acid, and the average diameter of the primary particles is within the above numerical range, but the specific surface area by the BET method is the above numerical value. Since it is out of the range, it can be seen that the dispersibility was not preferable and the SPF was not promoted. Further, the sunscreen cosmetic according to Comparative Example 3 is hydrophilic because the average diameter of the primary particles and the specific surface area by the BET method are within the above numerical ranges, but the surface of anhydrous silicic acid is not hydrophobized. Therefore, it can be seen that SPF was not promoted. Further, in the sunscreen cosmetics according to Comparative Example 4, the average diameter of the primary particles and the specific surface area by the BET method are outside the above numerical ranges, and the surface of anhydrous silicic acid is hydrophilic without being hydrophobized. It can be seen that SPF was not promoted.

Looking at the SPFs of Examples 4 to 7 and Comparative Examples 1 to 4, the SPFs are 63.7, 49.7, 49.7, 64.4, 24.5, 34.0, and 22, respectively. It became .2 and 25.1. This is the time when erythema appears on the skin when a general Japanese person is exposed to sunlight for about 20 minutes, which is 21.2 hours and 16.6 hours when converted by the formula of SPF value x 20 minutes ÷ 60, respectively. , 16.6 hours, 21.5 hours, 8.2 hours, 11.3 hours, 7.4 hours, 8.4 hours. Therefore, the sunscreen cosmetics of Examples 5 and 6 may be used for more than half a day, and the sunscreen cosmetics of Examples 4 and 7 may be used for about one day to prolong the time for erythema to appear on the skin. It can be expected, and it can be seen that an excellent sunscreen effect can be expected.

As shown in Table 3, sodium dilauroyl glutamate lysine, polyglyceryl-3 methylglucose distearate, glyceryl stearate, polyoxyethylene sorbitan monostearate (polysorbate 60), polyoxyethylene sorbitan tristearate (polysorbate 65), olein. The sunscreen cosmetics according to Examples 8 to 13 using one or two surfactants selected from polyoxyethylene sorbitan acid (polysorbate 80) are sunscreens that promote SPF and have a good usability. It turns out that it is a cosmetic.

As shown in Table 4, the sunscreen cosmetics according to Examples 14 to 17 are obtained by appropriately selecting a surfactant and the like, appropriately selecting the blending amount thereof, and appropriately selecting the blending amount of the ultraviolet absorber. , SPF is further promoted, and it can be seen that the sunscreen cosmetic has a better usability.

Claims (5)

The following components (a) to (d);
(A) One or more organic UV absorbers,
(B) Hydrophobic treatment Silicic anhydride,
(C) Surfactant,
(D) Oil agent,
, Containing,
The above-mentioned (b) hydrophobicized silicic acid anhydride has a dimethyldichlorosilane surface-treated hydrophobicity having an average primary particle diameter of 11.5 nm or more and 12.4 nm or less and a specific surface area of 170 ± 20 m ² / g by the BET method. A sunscreen cosmetic that is an anhydrous silicic acid . The sunscreen cosmetic according to claim 1, which is an oil-in-water emulsified sunscreen cosmetic. (A) The sunscreen cosmetic according to claim 1 or 2, wherein the one or more kinds of organic ultraviolet absorbers contain at least a silicone-based ultraviolet absorber. The sunscreen cosmetic according to claim 3, wherein the silicone-based ultraviolet absorber is dimethicodiethylbenzalmaronate. Moreover,
(E) Water-soluble polymer,
(F) Water,
The sunscreen cosmetic according to any one of claims 1 to 4.

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