JP7410704B2 - Water-in-oil emulsion cosmetic for sunscreen - Google Patents

Description

The present invention relates to a water-in-oil emulsion cosmetic for sunscreen.

Emulsified sunscreen cosmetics are broadly classified into oil-in-water type and water-in-oil type. As an oil-in-water sunscreen emulsion cosmetic, for example, an oil-in-water emulsion cosmetic in which oil droplets containing alkyldimethylsilylpolypropylsilsesquioxane along with an ultraviolet absorber etc. are dispersed in water is known. (Patent Documents 1 and 2).

Special Publication No. 2007-532754 International publication 2018/062469 pamphlet

However, the oil-in-water emulsion cosmetic using alkyldimethylsilyl polypropyl silsesquioxane, etc. disclosed in Patent Document 2, even when a tissue paper or the like is pressed on top of the cosmetic after applying the cosmetic to the skin, the oil-in-water emulsion cosmetic does not contain any makeup. Although it is said that secondary adhesion of materials is difficult, it is insufficient in terms of abrasion resistance, and the coating is likely to peel off when the surface of the coated area is rubbed with a stronger force.

The present invention relates to providing an emulsified cosmetic for sunscreen that is less sticky after application and has excellent abrasion resistance.

The present inventor has created a water-in-oil emulsion cosmetic by combining an alkyl-modified silicone wax with a melting point of 60°C or higher and a hydrophobically treated ultraviolet scattering agent, which is useful as a sunscreen and has less stickiness after application. The present invention was completed based on the discovery that the coating not only has a good feeling when used, but also has excellent abrasion resistance after application.

That is, the present invention provides a water-in-oil emulsion cosmetic for sunscreen containing the following components (A), (B), and (C).
(A) Alkyl-modified silicone wax with a melting point of 60°C or higher (B) Hydrophobized ultraviolet scattering agent (C) Water

The water-in-oil emulsion cosmetic for sunscreen of the present invention has excellent abrasion resistance. It also has a good feeling of use with less stickiness after application.

<Water-in-oil emulsion cosmetic for sunscreen>
(Component (A))
The water-in-oil emulsion cosmetic for sunscreen of the present invention contains an alkyl-modified silicone wax with a melting point of 60°C or higher.
The alkyl-modified silicone wax of component (A) is one in which dimethyl silicone is modified with an alkyl group having 9 to 80 carbon atoms and has a melting point of 60°C or higher, from the viewpoint of abrasion resistance and feel (non-stickiness). Preferably.
The above alkyl group may be linear or branched. The number of carbon atoms in the alkyl group is preferably 16 or more, more preferably 20 or more, and particularly preferably 24 or more from the viewpoint of abrasion resistance. From this point of view, it is preferably 70 or less, more preferably 60 or less, particularly preferably 50 or less. The specific range is preferably 16 or more and 70 or less, more preferably 20 or more and 60 or less, and particularly preferably 24 or more and 50 or less.
Further, the substitution position of this alkyl group is arbitrary, and the form of substitution may be any one terminal type, both terminal type, random type, etc. Further, the number of alkyl groups substituted is also arbitrary, and may be one or two or more in the molecule. When the number of substituted alkyl groups is two or more, the two or more alkyl groups may be the same or different. Note that as the alkyl-modified silicone wax having a melting point of 60° C. or higher, a mixture of silicone waxes modified with different types of alkyl groups may be used.

The melting point of the component (A) alkyl-modified silicone wax used in the present invention is 60°C or higher, but preferably 61°C or higher, more preferably from the viewpoint of abrasion resistance, feeling of use (non-stickiness, smoothness), etc. is 62°C or higher, and from the viewpoint of ease of manufacture, it is preferably 120°C or lower, more preferably 90°C or lower, still more preferably 80°C or lower, particularly preferably 72°C or lower. The specific range is preferably 60°C or more and 90°C or less, more preferably 61°C or more and 80°C or less, and particularly preferably 62°C or more and 72°C or less.
As used herein, melting point means the melting point measured according to JIS K0064.

The component (A) alkyl-modified silicone wax with a melting point of 60°C or higher is preferably an oil-soluble alkyl-modified silicone wax with a melting point of 60°C or higher. Examples of such alkyl-modified silicone wax include alkyl methicone wax, alkyl dimethicone wax, silsesquioxane resin wax, and the like. good. Among these, alkyl methicone wax and silsesquioxane resin wax are preferable from the viewpoint of abrasion resistance, feeling of use (no stickiness, smoothness, no film feeling), and silsesquioxane resin wax is particularly preferable. preferable. As the silsesquioxane resin wax, alkyl (C30-45) dimethylsilyl polypropyl silsesquioxane is preferred.

Component (A), the alkyl-modified silicone wax having a melting point of 60° C. or higher, may be a commercially available product or may be synthesized by a conventional method. For example, alkyl (C26-28) methicone (BELSIL CM 7026 VP, manufactured by Asahi Kasei Wacker Silicone Co., Ltd., melting point 70°C), alkyl (C30-45) methicone (AMS-C30 Cosmetic Wax, manufactured by Toray Dow Corning Co., Ltd., melting point 73 ~ 77°C), alkyl (C30-45) dimethicone (SF-1642, manufactured by Momentive Performance Materials Japan LLC, melting point 60-70°C), alkyl (C30-45) dimethylsilyl polypropylsilsesquioxane (SW -8005 C30 Resin Wax, manufactured by Dow Corning Toray, melting point 63-71°C).
Note that the alkyl-modified silicone waxes having a melting point of 60° C. or higher may be used alone or in combination of two or more.

The content of alkyl-modified silicone wax with a melting point of 60° C. or higher is preferably determined in the water-in-oil emulsion cosmetic for sunscreen of the present invention from the viewpoints of abrasion resistance, feeling of use (non-stickiness, smoothness), etc. 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.15% by mass or more, even more preferably 0.4% by mass or more, particularly preferably 0.8% by mass or more, and From the viewpoints of ease of manufacture, feeling of use (no filmy feeling), etc., in the water-in-oil emulsion cosmetic for sunscreen of the present invention, preferably 16% by mass or less, more preferably 12% by mass or less, and even more preferably is 8% by mass or less, particularly preferably 4% by mass or less. The specific range is preferably 0.05% by mass or more and 16% by mass or less, more preferably 0.1% by mass or more and 12% by mass or less, in the water-in-oil emulsified cosmetic for sunscreen of the present invention. The content is more preferably .15% by mass or more and 8% by mass or less, even more preferably 0.4% by mass or more and 8% by mass or less, and particularly preferably 0.8% by mass or more and 4% by mass or less.
In addition, when the content of the alkyl-modified silicone wax with a melting point of 60 ° C. or more is 0.4% by mass or more, the feeling of use (no film feeling) is particularly improved, and when the content is 0.8% by mass or more, In addition to the feeling of use (no filmy feeling), the abrasion resistance is further improved.

(Component (B))
The water-in-oil emulsion cosmetic for sunscreen of the present invention contains a hydrophobized ultraviolet scattering agent. As the hydrophobized ultraviolet scattering agent, hydrophobized fine particle metal oxides are preferred.
As the particulate metal oxide used in the hydrophobized particulate metal oxide, from the viewpoint of availability, one or more particulate metal oxides selected from zinc oxide, titanium oxide, cerium oxide, iron oxide, and chromium oxide are used. Preferably. Among these particulate metal oxides, one or more particulate metal oxides selected from zinc oxide, titanium oxide, and cerium oxide are preferred from the viewpoint of UV protection effect, etc. One or more types of fine particle metal oxides are more preferred. Note that these fine particle metal oxides can contain trace elements with a valence of +2 or more, and metals such as iron, zirconium, calcium, manganese, magnesium, and yttrium may be used alone or in combination of two or more to form fine particle metal oxides. It can be included in the oxide.
Further, from the viewpoint of friction resistance and the like, it is preferable to use at least hydrophobized fine particle zinc oxide as the hydrophobized fine particle metal oxide. For example, using only hydrophobized fine-particle zinc oxide, or using hydrophobized fine-particle zinc oxide in combination with other hydrophobized fine-particle metal oxides such as hydrophobized fine-particle titanium oxide or hydrophobized fine-particle cerium oxide. It is preferable.

The shape of the above-mentioned "particulate metal oxide" is not particularly limited, and examples include spherical, plate-like, rod-like, spindle-like, needle-like, and irregular shapes.
Further, the average particle diameter of the above-mentioned "particulate metal oxide" is preferably 0.01 μm or more, more preferably 0.012 μm or more, even more preferably 0.015 μm or more, and preferably 1 μm or less, more preferably It is 0.8 μm or less, more preferably 0.5 μm or less. The specific range of the average particle diameter is preferably 0.01 μm or more and 1 μm or less, more preferably 0.012 μm or more and 0.8 μm or less, and particularly preferably 0.015 μm or more and 0.5 μm or less. By setting the average particle diameter within this range, a sufficient ultraviolet protection effect can be exhibited and dispersion stability can be improved.
Note that the average particle size of the fine metal oxide particles means the average particle size measured by a laser diffraction/scattering method.

Examples of fine particle zinc oxide include FINEX-25, FINEX-30, FINEX-50, FINEX-75 (manufactured by Sakai Chemical Industry Co., Ltd.), MZ500 series, MZ700 series (manufactured by Teika Co., Ltd.), and ZnO-350 (manufactured by Sumitomo Osaka Cement Co., Ltd.). (manufactured by) are commercially available. As particulate titanium oxide, for example, TTO-55 series, TTO-51 series (manufactured by Ishihara Sangyo Co., Ltd.), JR series, JA series (manufactured by Teika Corporation), etc. are commercially available. As the particulate cerium oxide, for example, high purity cerium sold by Nikki Co., Ltd. or Seimi Chemical Co., Ltd. may be used.

The above-mentioned hydrophobizing treatment of the fine particle metal oxide may be carried out using a known hydrophobizing surface treatment agent, such as fluorine compound treatment, silicone treatment, silicone resin treatment, pendant treatment, and silane coupling agent treatment. , titanium coupling agent treatment, oil treatment, N-acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, amino acid treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, silane compound treatment, silazane compound treatment, etc. It will be done.
Among these treatments, from the viewpoint of dispersion stability etc., treatment with silicone or silicone resin, treatment with silane compound or silazane compound, treatment with metal soap such as aluminum isostearate are preferred.

Examples of the silicone or silicone resin include methylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, methylhydrogenpolysiloxane/dimethylpolysiloxane copolymer, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodeca Methylcyclohexasiloxane, octamethyltrisiloxane, tetradecamethylhexasiloxane, dimethylsiloxane/methyl (polyoxyethylene) siloxane/methyl (polyoxypropylene) siloxane copolymer, dimethylsiloxane/methyl (polyoxyethylene) siloxane copolymer Examples include dimethylsiloxane/methyl(polyoxypropylene)siloxane copolymer, dimethylsiloxane/methylcetyloxysiloxane copolymer, dimethylsiloxane/methylstearoxysiloxane copolymer, and the like. As the methylhydrogenpolysiloxane/dimethylpolysiloxane copolymer, one represented by the following formula (2) is preferable.

[In formula (2), m and n are integers greater than or equal to 0, and 1≦m+n≦60. ]

The above-mentioned silane compound or silazane compound is preferably a silane compound or silazane compound having an alkyl group having 1 to 20 carbon atoms or a fluoroalkyl group having 1 to 20 carbon atoms and having reactivity with an inorganic oxide, and is preferably a silane compound or silazane compound having the following formula ( A silane compound represented by 3) or a silazane compound represented by the following formula (4) is more preferable. Note that one type of these may be used alone or two or more types may be used in combination.

R ⁴ (R ⁵ ) _p Si(Z) _3-p ...(3)

[In formula (3),
R ⁴ represents a linear or branched alkyl group having 1 to 20 carbon atoms, or a linear or branched fluoroalkyl group having 1 to 20 carbon atoms;
R ⁵ represents a linear or branched alkyl group having 1 to 6 carbon atoms,
Z represents a halogen atom or an alkoxy group,
p represents 0 or 1. ]

R ⁶ R ⁷ R ⁸ SiNHSiR ⁹ R ¹⁰ R ¹¹ ...(4)

[In formula (4), R ⁶ to R ¹¹ are each independently a linear or branched alkyl group having 1 to 20 carbon atoms, or a linear or branched alkyl group having 1 to 20 carbon atoms. represents a fluoroalkyl group. ]

As the silane compound, from the viewpoint of dispersion stability and the like, alkyl alkoxysilane or fluoroalkylalkoxysilane is preferable, and alkyltrialkoxysilane or fluoroalkyltrialkoxysilane is more preferable. Specific examples include hexyltrimethoxysilane, octyltrimethoxysilane, octyltriethoxysilane, decyltrimethoxysilane, octadecyltrimethoxysilane, trifluoropropyltrimethoxysilane, heptadecafluorodecyltrimethoxysilane, and the like. Note that one type of these may be used alone or two or more types may be used in combination. Among these, octyltrimethoxysilane and octyltriethoxysilane are more preferred.
Further, specific examples of the silazane compound include hexamethyldisilazane and the like.

The coating amount of the surface treatment agent used in the hydrophobization treatment is preferably 3 parts by mass or more, more preferably 5 parts by mass, based on 100 parts by mass of the particulate metal oxide, from the viewpoint of emulsion stability, dispersion stability, etc. From the viewpoint of emulsion stability, dispersion stability, etc., the amount is preferably 15 parts by mass or less, more preferably 10 parts by mass or less, based on 100 parts by mass of the particulate metal oxide.

The hydrophobization treatment can be carried out by appropriately selecting a conventionally known method. For example, as the treatment with silicone or silicone resin, at least one silicone compound (excluding silane compounds) consisting of organopolysiloxanes and silicone resin is used as described in Japanese Patent No. 3187440. Another method is to coat the surface of the fine metal oxide particles with silicon oxide by coating the fine metal oxide particles in a non-vapor phase state and then firing at a temperature of 600 to 950° C. in an oxygen-containing atmosphere.
Further, as a treatment method using a silane compound or a silazane compound, a chemical bonding method may be mentioned. Examples include a method in which the organic solvent is removed by heating (for example, 80 to 250° C.) or reduced pressure after mixing with an oxide and pulverizing if necessary. Another example is a method of coating the surface with a polysiloxane compound and then treating the surface with a silane compound in water, as described in JP-A-2007-326902.

Note that the hydrophobized ultraviolet scattering agent may be used alone or in combination of two or more.

The content of the hydrophobized ultraviolet scattering agent is preferably 2 mass in the water-in-oil emulsion cosmetic for sunscreen of the present invention from the viewpoints of abrasion resistance, feeling of use (non-stickiness), ultraviolet protection effect, etc. % or more, more preferably 6% by mass or more, still more preferably 7.5% by mass or more, particularly preferably 10% by mass or more, and from the viewpoints of use feeling (no powderiness), formulation stability, etc. In the water-in-oil emulsion cosmetic for sunscreen of the present invention, the content is preferably 35% by mass or less, more preferably 30% by mass or less, still more preferably 25% by mass or less, particularly preferably 20% by mass or less. The specific range is preferably 2% by mass or more and 35% by mass or less, more preferably 6% by mass or more and 30% by mass or less, and 7.5% by mass in the water-in-oil emulsion cosmetic for sunscreen of the present invention. It is more preferably 25% by mass or less, and particularly preferably 10% by mass or more and 20% by mass or less.
Note that when the content of the hydrophobized ultraviolet scattering agent is 7.5% by mass or more or 10% by mass or more, the friction resistance is particularly improved.

In addition, the content ratio [(A)/(B)] of component (A) alkyl-modified silicone wax with a melting point of 60°C or higher to component (B) hydrophobized ultraviolet scattering agent is ) etc., it is preferably 0.005 or more, more preferably 0.01 or more, even more preferably 0.025 or more, even more preferably 0.05 or more, particularly preferably 0.075 or more, and From the viewpoint of friction properties, feeling of use (no powderiness), no white residue on the skin after application, etc., it is preferably 1.67 or less, more preferably 1.1 or less, and even more preferably 0.7 or less. , particularly preferably 0.3 or less. The specific range is preferably 0.005 or more and 1.67 or less, more preferably 0.01 or more and 1.1 or less, even more preferably 0.025 or more and 0.7 or less, and 0.05 or more and 0.3 or less. is more preferable, and particularly preferably 0.075 or more and 0.3 or less.
In addition, when the content mass ratio [(A)/(B)] is 0.025 or more, the feeling of use (no film feeling) is particularly improved, and when it is 0.075 or more, the feeling of use (no film feeling) is improved. In addition to this, the abrasion resistance is further improved.

(Component (C))
The water-in-oil emulsion cosmetic for sunscreen of the present invention contains water.
The water content is preferably 1% by mass or more, more preferably 2.5% by mass in the water-in-oil emulsion cosmetic for sunscreen of the present invention from the viewpoint of feeling of use (fresh feeling, smoothness), etc. The water-in-oil emulsion cosmetic for sunscreen of the present invention is more preferably 5% by mass or more, particularly preferably 10% by mass or more, and from the viewpoint of formulation stability, feel (non-stickiness), etc. In the composition, the content is preferably 50% by mass or less, more preferably 40% by mass or less, still more preferably 30% by mass or less, particularly preferably 20% by mass or less. The specific range is preferably 1% by mass or more and 50% by mass or less, more preferably 2.5% by mass or more and 40% by mass or less, and 5% by mass in the water-in-oil emulsion cosmetic for sunscreen of the present invention. It is more preferably 30% by mass or less, and particularly preferably 10% by mass or more and 20% by mass or less.

(Component (D))
The water-in-oil emulsion cosmetic for sunscreen of the present invention preferably contains (D) an ultraviolet absorber in addition to components (A) to (C) from the viewpoint of ultraviolet protection effect. As the ultraviolet absorber, organic ultraviolet absorbers are preferable from the viewpoints of water resistance, abrasion resistance, solubility, and the like.
Examples of organic UV absorbers include benzoic acid-based UV absorbers, anthranilic acid-based UV absorbers, salicylic acid-based UV absorbers, cinnamic acid-based UV absorbers, benzophenone-based UV absorbers, and triazine-based UV absorbers. It will be done. Among these, one or more selected from benzoic acid-based ultraviolet absorbers, cinnamic acid-based ultraviolet absorbers, and triazine-based ultraviolet absorbers are preferred. Moreover, as the organic ultraviolet absorber, an oil-soluble organic ultraviolet absorber is preferable.

Benzoic acid-based UV absorbers include para-aminobenzoic acid (PABA), glyceryl PABA, ethyl dihydroxypropyl PABA, N-ethoxylate PABA ethyl ester, N-dimethyl PABA ethyl ester, N-dimethyl PABA butyl ester. , N-dimethyl PABA amyl ester, octyldimethyl PABA, diethylaminohydroxybenzoylhexyl benzoate, and the like.
Examples of anthranilic acid-based ultraviolet absorbers include homomenthyl-N-acetylanthranilate and the like.
Examples of salicylic acid-based ultraviolet absorbers include amyl salicylate, menthyl salicylate, homomenthyl salicylate, octylsalicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc. .

Cinnamic acid-based ultraviolet absorbers include octyl cinnamate, ethyl-4-isopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate, propyl-p-methoxycinnamate, and isopropyl cinnamate. -p-methoxycinnamate, isoamyl-p-methoxycinnamate, 2-ethylhexyl-p-methoxycinnamate, 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano- Examples include β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl diparamethoxycinnamate.
Examples of benzophenone ultraviolet absorbers include 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dihydroxybenzophenone, and 2-hydroxy-4-methoxybenzophenone. , 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenylbenzophenone-2-carboxylate, 2-hydroxy-4- Examples include n-octoxybenzophenone and 4-hydroxy-3-carboxybenzophenone.
Examples of triazine-based ultraviolet absorbers include 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, dioctylbutamide triazone, and 2,4-bis- Examples include [{4-(2-ethylhexyloxy)-2-hydroxy}-phenyl]-6-(4-methoxyphenyl)-1,3,5-triazine.
Other organic UV absorbers include 3-(4'-methylbenzylidene)-dl-camphor, 3-benzylidene-dl-camphor, urocanic acid ethyl ester, 2-phenyl-5-methylbenzoxazole, 2,2 '-Hydroxy-5-methylphenylbenzotriazole, 2-(2'-hydroxy-5-t-octylphenyl)benzotriazole, dibenzalazine, dianisoylmethane, 4-methoxy-4'-t-butyldibenzoylmethane, 5 -(3,3-dimethyl-2-norbonylidene)-3-pentan-2-one, benzene bis-1,3-diketone derivatives described in JP-A-2-212579, and as described in JP-A-3-220153 Examples include benzoylpinacolon derivatives.

Further, organic ultraviolet absorbers can be broadly classified into organic ultraviolet absorbers that are solid at 25°C under 1 atm and organic ultraviolet absorbers that are liquid at 25°C under 1 atm. In the present invention, it is preferable to use at least an organic UV absorber that is solid at 25° C. under 1 atmosphere as the UV absorber. In this case, an organic ultraviolet absorber that is solid at 25°C under 1 atm and an organic ultraviolet absorber that is liquid at 25°C under 1 atm may be used in combination.
In addition, for example, the above-mentioned diethylaminohydroxybenzoylhexyl benzoate, 2,4-bis-[{4-(2-ethylhexyloxy)-2-hydroxy}-phenyl]-6-(4-methoxyphenyl)- 1,3,5-triazine, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, etc. are solid organic ultraviolet absorbers at 25°C under 1 atm. It is. In addition, the above-mentioned isopropyl-p-methoxycinnamate, 2-ethylhexyl-p-methoxycinnamate, 2-ethoxyethyl-p-methoxycinnamate, etc. are liquid organic ultraviolet absorbers at 25°C under 1 atm. be.

Note that the ultraviolet absorbers may be used alone or in combination of two or more.

The content of the ultraviolet absorber is preferably 1% by mass or more, more preferably 3% by mass or more, still more preferably 6% by mass, in the water-in-oil emulsion cosmetic for sunscreen of the present invention, from the viewpoint of UV protection effect etc. The content is at least 9% by mass, particularly preferably at least 9% by mass, and from the viewpoint of feeling of use (non-stickiness), preferably at most 30% by mass, in the water-in-oil emulsion cosmetic for sunscreen of the present invention. The content is preferably 25% by mass or less, more preferably 20% by mass or less, particularly preferably 15% by mass or less. As a specific range, in the water-in-oil emulsion cosmetic for sunscreen of the present invention, 1% by mass or more and 30% by mass or less, more preferably 3% by mass or more and 25% by mass or less, and 6% by mass or more and 20% by mass or less. It is more preferably at most 9% by mass and at most 15% by mass.

In addition, when using an organic ultraviolet absorber that is solid at 25°C under 1 atm as an ultraviolet absorber, the content of the organic ultraviolet absorber that is solid at 25°C under 1 atm is determined from the viewpoint of ultraviolet protection effect. In the water-in-oil emulsion cosmetic for sunscreen, preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.5% by mass or more, particularly preferably 1% by mass or more. In addition, from the viewpoint of usability (non-stickiness), the water-in-oil emulsion cosmetic for sunscreen of the present invention preferably contains 10% by mass or less, more preferably 8% by mass or less, and even more preferably 6% by mass. The content is particularly preferably 4% by mass or less. The specific range is preferably 0.05% by mass or more and 10% by mass or less, more preferably 0.1% by mass or more and 8% by mass or less, in the water-in-oil emulsion cosmetic for sunscreen of the present invention. It is more preferably .5% by mass or more and 6% by mass or less, particularly preferably 1% by mass or more and 4% by mass or less.
In addition, when using an organic ultraviolet absorber that is liquid at 1 atm and 25°C as an ultraviolet absorber, the content of the organic ultraviolet absorber that is liquid at 1 atm and 25°C is determined from the viewpoint of ultraviolet protection effect. In the water-in-oil emulsion cosmetic for sunscreen, preferably 1% by mass or more, more preferably 3% by mass or more, even more preferably 5.5% by mass or more, particularly preferably 8% by mass or more, and the use From the viewpoint of texture (non-stickiness), in the water-in-oil emulsion cosmetic for sunscreen of the present invention, preferably 20% by mass or less, more preferably 17% by mass or less, still more preferably 14% by mass or less, particularly preferably is 10% by mass or less. The specific range is preferably 1% by mass or more and 20% by mass or less, more preferably 3% by mass or more and 17% by mass or less, and 5.5% by mass in the water-in-oil emulsion cosmetic for sunscreen of the present invention. It is more preferably 14% by mass or less, and particularly preferably 8% by mass or more and 10% by mass or less.

The total content of (B) a hydrophobized ultraviolet scattering agent and (D) an ultraviolet absorber is determined from the viewpoint of abrasion resistance, feeling of use (non-stickiness), etc. in the water-in-oil emulsion for sunscreen of the present invention. In the cosmetics, preferably 12% by mass or more, more preferably 15% by mass or more, still more preferably 18% by mass or more, particularly preferably 21% by mass or more, and also has good abrasion resistance and feeling on use (non-stickiness). From the viewpoint of the above, in the water-in-oil emulsion cosmetic for sunscreen of the present invention, preferably 40% by mass or less, more preferably 36% by mass or less, still more preferably 32% by mass or less, particularly preferably 28% by mass or less. It is. The specific range is preferably 12% by mass or more and 40% by mass or less, more preferably 15% by mass or more and 36% by mass or less, and 18% by mass or more and 32% by mass in the water-in-oil emulsion cosmetic for sunscreen of the present invention. It is more preferably at most 21% by mass and at most 28% by mass.

In addition, the content ratio [(A)/(D)] of component (A) alkyl-modified silicone wax with a melting point of 60°C or higher to component (D) ultraviolet absorber is determined by From the viewpoint, it is preferably 0.01 or more, more preferably 0.02 or more, still more preferably 0.04 or more, particularly preferably 0.06 or more, and also has good abrasion resistance, feeling in use (non-stickiness), From the viewpoint of UV protection effect, etc., it is preferably 0.32 or less, more preferably 0.24 or less, still more preferably 0.2 or less, particularly preferably 0.16 or less. The specific range is preferably 0.01 or more and 0.32 or less, more preferably 0.02 or more and 0.24 or less, even more preferably 0.04 or more and 0.2 or less, and 0.06 or more and 0.16 or less. is particularly preferred.

In addition, the content ratio [(B)/(D)] of component (B) hydrophobized UV scattering agent to component (D) UV absorber is determined from the viewpoint of feeling of use (non-stickiness), UV protection effect, etc. , preferably 0.1 or more, more preferably 0.3 or more, even more preferably 0.5 or more, particularly preferably 1 or more, and from the viewpoint of feeling on use (non-stickiness), ultraviolet protection effect, etc. It is preferably 3 or less, more preferably 2.6 or less, even more preferably 2.3 or less, particularly preferably 2 or less. The specific range is preferably 0.1 or more and 3 or less, more preferably 0.3 or more and 2.6 or less, even more preferably 0.5 or more and 2.3 or less, and particularly preferably 1 or more and 2 or less.

In addition to the above-mentioned components, the water-in-oil emulsion cosmetic for sunscreen of the present invention contains a liquid oil other than an organic ultraviolet absorber that is liquid at 1 atm and 25°C (hereinafter also referred to as "other liquid oil"). , surfactants, powders other than component (B), waxes other than component (A), lower alcohols, preservatives, perfumes, pH adjusters, humectants, film-forming agents, etc. It should be noted that one of these may be used alone or two or more may be used in combination. In addition to these, a thickener as described in the International Publication No. 2018/062469 pamphlet may be used, but the content of the thickener is determined by the feeling of use (non-stickiness), applicability, etc. From the viewpoint, in the water-in-oil emulsion cosmetic for sunscreen of the present invention, 0 to 1% by mass is preferred, 0 to 0.1% by mass is more preferred, 0 to 0.01% by mass is even more preferred, and 0 to 0.01% by mass is even more preferred. Particularly preferred is 0.001% by weight. According to the present invention, excellent abrasion resistance can be obtained even when the content of the thickener is within this range.

Other liquid oils refer to oils that are liquid at 25° C. under 1 atm, other than organic ultraviolet absorbers, and may be volatile oils or non-volatile oils. Further, one type may be used alone or two or more types may be used in combination. A volatile oil is an oil that exhibits volatility at room temperature (25°C), and a non-volatile oil is an oil that does not exhibit volatility at room temperature (25°C).

Examples of the volatile oil agent include light isoparaffin, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, methyltrimethicone, decamethyltetrasiloxane, ethyltrisiloxane, volatile methylpolysiloxane, and the like.
Commercially available light isoparaffins include Isopar H (manufactured by Esso Kagaku), isododecane (manufactured by Bayer), isohexadecane (manufactured by Unikema), IP Solvent 1620MU, IP Solvent 2028MU, and IP Solvent 2835 (manufactured by Idemitsu Kosan). ) etc. Commercial products of decamethylcyclopentasiloxane include TFS405 (manufactured by Momentive Performance Materials Japan LLC), SH245, DC345 (manufactured by Toray Dow Corning), and KF-995 (manufactured by Shin-Etsu Chemical Co., Ltd.). Can be mentioned. Commercially available products of methyl trimethicone include Silicone TMF-1.5 (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercial products of decamethyltetrasiloxane include KF-96L-1.5CS (manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available products of ethyltrisiloxane include SILSOFTETS (manufactured by Momentive Performance Materials Japan LLC). Commercially available volatile methylpolysiloxanes include KF-96L-2CS (manufactured by Shin-Etsu Chemical Co., Ltd.).

Examples of nonvolatile oils include nonvolatile hydrocarbon oils such as light liquid paraffin, liquid paraffin, heavy liquid isoparaffin, and squalane; nonvolatile silicone oils such as nonvolatile dimethylpolysiloxane and nonvolatile methylphenylpolysiloxane; 2-ethylhexane. Non-volatile fatty acid ester oil such as cetyl acid, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, stearyl stearate; alkyl benzoate (C12-15) etc. In addition, as non-volatile fatty acid ester oils, fatty acid triglycerides such as tri(caprylic acid/capric acid) glyceryl and tri(2-ethylhexanoic acid) glyceryl; fatty acids and neopentyl glycol dicaprate, neopentyl glycol diethylhexanoate, etc. Ester with pentyl glycol; polyhydric alcohol fatty acid ester oil, etc. may also be used.
Commercially available liquid paraffins include Pearleam 4 (manufactured by NOF Corporation) and the like. Commercially available nonvolatile dimethylpolysiloxanes include KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.). Examples of commercially available isopropyl palmitate include Exepal IPP (manufactured by Kao Corporation). Commercially available alkyl benzoates (C12-15) include FINSOLV TN (manufactured by Innospec Active Chemicals) and the like. Commercially available neopentyl glycol dicaprates include Estemol N-01 (manufactured by Nisshin Oillio Group) and the like.

The content of other liquid oil agents in the water-in-oil emulsion cosmetic for sunscreen of the present invention is preferably 5% by mass or more, more preferably 10% by mass or more, still more preferably 20% by mass or more, particularly preferably 30% by mass or more, and in the water-in-oil emulsion cosmetic for sunscreen of the present invention, preferably 80% by mass or less, more preferably 70% by mass or less, still more preferably 65% by mass or less, particularly preferably It is 60% by mass or less. The specific range is preferably 5% by mass or more and 80% by mass or less, more preferably 10% by mass or more and 70% by mass or less, and 20% by mass or more and 65% by mass in the water-in-oil emulsion cosmetic for sunscreen of the present invention. It is more preferably at most 30% by mass and at most 60% by mass.

In addition, the total amount of non-volatile oil contained in cosmetics (in addition to the organic ultraviolet absorber that is liquid at 25°C under 1 atm), if the above-mentioned non-volatile oil is used as "other liquid oil", The content ratio of component (A) alkyl-modified silicone wax having a melting point of 60°C or higher to the sum of the organic ultraviolet absorber and non-volatile oil that is liquid at 30°C is preferably from the viewpoint of abrasion resistance, ease of manufacture, etc. 0.001 or more, more preferably 0.005 or more, even more preferably 0.01 or more, particularly preferably 0.02 or more, and from the viewpoint of friction resistance, preferably 0.4 or less, more preferably It is 0.2 or less, more preferably 0.1 or less, particularly preferably 0.05 or less. The specific range is preferably 0.001 or more and 0.4 or less, more preferably 0.005 or more and 0.2 or less, even more preferably 0.01 or more and 0.1 or less, and 0.02 or more and 0.05 or less. is particularly preferred.

As the above-mentioned surfactant, known surfactants such as anionic surfactants, cationic surfactants, nonionic surfactants, and amphoteric surfactants may be used, but water-in-oil emulsified cosmetics can be stably prepared. For this purpose, it is preferable to use a nonionic surfactant with an HLB of 8 or less, and more preferably a nonionic surfactant with an HLB of 3 to 6 (particularly preferably an HLB of 3 to 5). Here, HLB is an index indicating the hydrophilicity-lipophilicity balance (Hydrophile-Lipophile Balance), and is defined by the following equation by Oda and Teramura et al.

HLB = (ΣInorganic value / ΣOrganic value) × 10

As the nonionic surfactant having an HLB of 8 or less, polyether-modified silicone is preferable in order to stably prepare a water-in-oil emulsion cosmetic. The silicone chain of the polyether-modified silicone may be either linear or branched.
Examples of polyether-modified silicones include polyoxyethylene/methylpolysiloxane copolymer, poly(oxyethylene/oxypropylene)methylpolysiloxane copolymer, alkyl chain branched polyoxyethylenemethylpolysiloxane copolymer, and alkyl chain-branched polyoxyethylenemethylpolysiloxane copolymer. Examples include chain/silicone chain branched polyoxyethylene methyl polysiloxane copolymers. Among these, polyoxyethylene/methylpolysiloxane copolymer is preferred from the viewpoint of emulsion stability.
In addition, commercially available polyoxyethylene/methylpolysiloxane copolymers include KF-6015 (HLB4.5), KF-6017 (HLB4.5) (manufactured by Shin-Etsu Chemical Co., Ltd.), SH3775M (HLB5, Toray・Manufactured by Dow Corning), etc. Commercially available poly(oxyethylene/oxypropylene) methylpolysiloxane copolymers include KF-6012 (HLB7, manufactured by Shin-Etsu Chemical Co., Ltd.). Commercially available alkyl chain branched polyoxyethylene methyl polysiloxane copolymers include KF-6028 (HLB4.0, manufactured by Shin-Etsu Chemical Co., Ltd.). Commercial products of the alkyl chain/silicone chain branched polyoxyethylene methyl polysiloxane copolymer include KF-6038 (HLB 3.0, manufactured by Shin-Etsu Chemical Co., Ltd.).
The content of such a surfactant in the water-in-oil emulsion cosmetic for sunscreen of the present invention is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and still more preferably 0.01% by mass or more. 3% by mass or more, particularly preferably 0.5% by mass or more, and in the water-in-oil emulsion cosmetic for sunscreen of the present invention, preferably 10% by mass or less, more preferably 5% by mass or less, and It is preferably 3% by mass or less, particularly preferably 1% by mass or less. The specific range is preferably 0.01% by mass or more and 10% by mass or less, more preferably 0.1% by mass or more and 5% by mass or less, in the water-in-oil emulsion cosmetic for sunscreen of the present invention. It is more preferably 0.3% by mass or more and 3% by mass or less, and particularly preferably 0.5% by mass or more and 1% by mass or less.

The dosage form of the water-in-oil emulsion cosmetic for sunscreen of the present invention includes non-solid forms such as liquid, emulsion, cream, paste, and gel, with liquid, emulsion, and cream being preferred. .
The viscosity at 25°C of the water-in-oil emulsion cosmetic for sunscreen of the present invention is preferably 50 mPa·s or more, more preferably 100 mPa·s or more, and even more preferably 300 mPa·s or more, from the viewpoint of ease of application. , particularly preferably 500 mPa・s or more, and from the viewpoint of ease of application, preferably 30000 mPa・s or less, more preferably 10000 mPa・s or less, still more preferably 5000 mPa・s or less, particularly preferably 3000 mPa・s It is as follows. The water-in-oil emulsion cosmetic for sunscreen of the present invention has excellent abrasion resistance after application even when the viscosity range is such that it is easy to apply.
In addition, the said viscosity at 25 degreeC can be measured with a Brookfield viscometer (B type viscometer).
Further, the water-in-oil emulsion cosmetic for sunscreen of the present invention can be used as a sunscreen by applying it to the skin (preferably the skin excluding the scalp, more preferably the face, body, limbs, etc.). Moreover, the method of use is not particularly limited, but it is preferable to apply by hand or with an application tool.

The water-in-oil emulsion cosmetic for sunscreen of the present invention can be produced according to a conventional method. For example, oily components (water-insoluble components) such as component (A) and component (B) are heated and stirred together, and a water-soluble component such as component (C) is separately heated and stirred mixed. It can be produced by mixing the obtained oily component mixture and water-soluble component mixture, thoroughly stirring with a homogenizer, and then cooling.

Regarding the embodiments described above, the present invention further discloses the following cosmetics and the like.
<1> A water-in-oil emulsion cosmetic for sunscreen containing the following components (A), (B), and (C).
(A) Alkyl-modified silicone wax with a melting point of 60°C or higher (B) Hydrophobized ultraviolet scattering agent (C) Water

<2> The melting point of the alkyl-modified silicone wax of component (A) is preferably 61°C or higher, more preferably 62°C or higher, and preferably 120°C or lower, more preferably 90°C or lower, and still more preferably 80°C or lower. The water-in-oil emulsion cosmetic for sunscreen according to <1>, which has a temperature of 72°C or lower, particularly preferably 72°C or lower.
<3> The alkyl-modified silicone wax of component (A) is preferably an oil-soluble alkyl-modified silicone wax, more preferably one or two selected from alkyl methicone wax, alkyl dimethicone wax, and silsesquioxane resin wax. The above, more preferably one or more selected from alkyl methicone wax and silsesquioxane resin wax, still more preferably silsesquioxane resin wax, particularly preferably alkyl (C30-45) The water-in-oil emulsion cosmetic for sunscreen according to <1> or <2>, which is dimethylsilylpolypropylsilsesquioxane.
<4> The content of component (A) in the water-in-oil emulsion cosmetic for sunscreen is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and even more preferably 0.15% by mass. % or more, more preferably 0.4% by mass or more, particularly preferably 0.8% by mass or more, and preferably 16% by mass or less, more preferably 12% by mass in the water-in-oil emulsion cosmetic for sunscreen. The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <3>, which has a content of % by mass or less, more preferably 8% by mass or less, particularly preferably 4% by mass or less.
<5> The content of component (A) in the water-in-oil emulsion cosmetic for sunscreen is preferably 0.05% by mass or more and 16% by mass or less, more preferably 0.1% by mass or more and 12% by mass or less. , more preferably 0.15% by mass or more and 8% by mass or less, still more preferably 0.4% by mass or more and 8% by mass or less, particularly preferably 0.8% by mass or more and 4% by mass or less, <1> to < The water-in-oil emulsion cosmetic for sunscreen according to any one of 3>.

<6> Component (B) is preferably a hydrophobized particulate metal oxide, more preferably one or more particulate metals selected from zinc oxide, titanium oxide, cerium oxide, iron oxide, and chromium oxide. Hydrophobized oxides, more preferably one or more fine particle metal oxides selected from zinc oxide, titanium oxide, and cerium oxide, particularly preferably zinc oxide. The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <5>, which is obtained by hydrophobizing one or more fine particle metal oxides selected from titanium oxide and titanium oxide.
<7> The hydrophobization treatment of component (B) is preferably a fluorine compound treatment, a silicone treatment, a silicone resin treatment, a pendant treatment, a silane coupling agent treatment, a titanium coupling agent treatment, an oil treatment, or an N-acylated lysine treatment. , polyacrylic acid treatment, metal soap treatment, amino acid treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, silane compound treatment, and silazane compound treatment, and more preferably silicone treatment, silicone resin treatment, The hydrophobization treatment selected from silane compound treatment, silazane compound treatment, and metal soap treatment, more preferably hydrophobization treatment selected from silicone treatment and silane compound treatment, according to any one of <1> to <6>. A water-in-oil emulsion cosmetic for sunscreen.
<8> The content of component (B) in the water-in-oil emulsion cosmetic for sunscreen is preferably 2% by mass or more, more preferably 6% by mass or more, still more preferably 7.5% by mass or more, especially It is preferably 10% by mass or more, and in the water-in-oil emulsion cosmetic for sunscreen, preferably 35% by mass or less, more preferably 30% by mass or less, still more preferably 25% by mass or less, particularly preferably 20% by mass or less. The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <7>, which has a content of % by mass or less.
<9> The content of component (B) in the water-in-oil emulsion cosmetic for sunscreen is preferably 2% by mass or more and 35% by mass or less, more preferably 6% by mass or more and 30% by mass or less, and even more preferably The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <7>, which has a content of 7.5% by mass or more and 25% by mass or less, particularly preferably 10% by mass or more and 20% by mass or less.

<10> The content mass ratio of component (A) to component (B) [(A)/(B)] is preferably 0.005 or more, more preferably 0.01 or more, even more preferably 0.025 or more, More preferably 0.05 or more, particularly preferably 0.075 or more, and preferably 1.67 or less, more preferably 1.1 or less, still more preferably 0.7 or less, particularly preferably 0.3 or less. The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <9>.
<11> The content mass ratio of component (A) to component (B) [(A)/(B)] is preferably 0.005 or more and 1.67 or less, more preferably 0.01 or more and 1.1 or less, Any one of <1> to <9>, which is more preferably 0.025 or more and 0.7 or less, still more preferably 0.05 or more and 0.3 or less, particularly preferably 0.075 or more and 0.3 or less. A water-in-oil emulsion cosmetic for sunscreen.
<12> The content of component (C) in the water-in-oil emulsion cosmetic for sunscreen is preferably 1% by mass or more, more preferably 2.5% by mass or more, still more preferably 5% by mass or more, especially Preferably it is 10% by mass or more, and in the water-in-oil emulsion cosmetic for sunscreen, preferably 50% by mass or less, more preferably 40% by mass or less, still more preferably 30% by mass or less, particularly preferably 20% by mass or less. The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <11>, which has a content of % by mass or less.
<13> The content of component (C) in the water-in-oil emulsion cosmetic for sunscreen is preferably 1% by mass or more and 50% by mass or less, more preferably 2.5% by mass or more and 40% by mass or less, and further The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <11>, preferably 5% by mass or more and 30% by mass or less, particularly preferably 10% by mass or more and 20% by mass or less.

<14> The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <13>, further comprising (D) an ultraviolet absorber.
<15> The sunscreen oil according to <14>, wherein component (D) is a combination of an organic ultraviolet absorber that is solid at 25°C under 1 atmosphere and an organic ultraviolet absorber that is liquid at 25°C under 1 atmosphere. Water-based emulsified cosmetics.
<16> Component (D) is diethylaminohydroxybenzoylhexyl benzoate, 2,4-bis-[{4-(2-ethylhexyloxy)-2-hydroxy}-phenyl]-6-(4-methoxyphenyl) -1,3,5-triazine and 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine under 1 atm of one or more selected from 25 An organic ultraviolet absorber that is solid at ℃ and one or more selected from isopropyl-p-methoxycinnamate, 2-ethylhexyl-p-methoxycinnamate, and 2-ethoxyethyl-p-methoxycinnamate at 1 atm. The water-in-oil emulsion cosmetic for sunscreen according to <14> or <15>, which is in combination with an organic ultraviolet absorber that is liquid at 25°C.
<17> The content of component (D) in the water-in-oil emulsion cosmetic for sunscreen is preferably 1% by mass or more, more preferably 3% by mass or more, still more preferably 6% by mass or more, particularly preferably 9% by mass or more, and preferably 30% by mass or less, more preferably 25% by mass or less, even more preferably 20% by mass or less, particularly preferably 15% by mass in the water-in-oil emulsion cosmetic for sunscreen. The water-in-oil emulsion cosmetic for sunscreen according to any one of <14> to <16> below.
<18> The content of component (D) in the water-in-oil emulsion cosmetic for sunscreen is preferably 1% by mass or more and 30% by mass or less, more preferably 3% by mass or more and 25% by mass or less, and even more preferably The water-in-oil emulsion cosmetic for sunscreen according to any one of <14> to <16>, which has a content of 6% by mass or more and 20% by mass or less, particularly preferably 9% by mass or more and 15% by mass or less.
<19> The total content of component (B) and component (D) in the water-in-oil emulsion cosmetic for sunscreen is preferably 12% by mass or more and 40% by mass or less, more preferably 15% by mass or more. The water-in-oil type sunscreen according to any one of <14> to <18>, which has a content of not more than 18% by mass and not more than 32% by mass, particularly preferably not less than 21% by mass and not more than 28% by mass. Emulsified cosmetics.
<20> The content mass ratio of component (A) to component (D) [(A)/(D)] is preferably 0.01 or more and 0.32 or less, more preferably 0.02 or more and 0.24 or less, The water-in-oil emulsion cosmetic for sunscreen according to any one of <14> to <19>, which is more preferably 0.04 or more and 0.2 or less, particularly preferably 0.06 or more and 0.16 or less.
<21> The content mass ratio of component (B) to component (D) [(B)/(D)] is preferably 0.1 or more and 3 or less, more preferably 0.3 or more and 2.6 or less, and even more preferably is 0.5 or more and 2.3 or less, particularly preferably 1 or more and 2 or less, the water-in-oil emulsion cosmetic for sunscreen according to any one of <14> to <20>.

<22> Furthermore, liquid oils other than organic ultraviolet absorbers that are liquid at 25°C under 1 atmosphere, surfactants, powders other than component (B), waxes other than component (A), lower alcohols, preservatives, The water-in-oil emulsion cosmetic for sunscreen according to any one of <1> to <21>, which contains one or more selected from fragrances, pH adjusters, humectants, and film-forming agents.

EXAMPLES Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the scope of the Examples. In this example, various measurements and evaluations were performed by the following methods. Further, Examples 4 to 6 are reference examples.

・Evaluation method (1) Friction resistance After uniformly applying each cosmetic to HelioPlates HD6 (manufactured by Labsphere) at a concentration of 0.93 mg/cm ² , using an SPF analyzer (UV-2000S, manufactured by Labsphere) The SPF value was measured. Thereafter, it was rubbed in one direction at a speed of about 25 mm/s with cotton loaded with a weight of 20 gf/cm ² . After standing at room temperature for 5 minutes, measure the SPF value of the rubbed area again, and calculate the friction resistance by the ratio of the SPF values before and after rubbing [= {(SPF value after rubbing) / (SPF value before rubbing)} x 100] The gender was evaluated. It can be said that the higher the value, the higher the abrasion resistance.
(2) Feeling of use The lack of stickiness after application was sensory evaluated by 10 expert panelists. The evaluation criteria are shown below.
(Evaluation criteria for usability)
A: 10 panelists answered that there was no stickiness.
B: 7-9 panelists answered that there was no stickiness.
C: 4-6 panelists answered that there was no stickiness.
D: 1-3 panelists answered that there was no stickiness.
E: No panel answered that there was no stickiness.
(3) SPF
Each cosmetic was applied uniformly to HelioPlates HD6 (manufactured by Labsphere) at a concentration of 0.93 mg/cm ² , and the SPF value was measured using an SPF analyzer (UV-2000S, manufactured by Labsphere).

Examples 1 to 8 and Comparative Examples 1 to 5
Water-in-oil emulsion cosmetics of Examples 1 to 8 and Comparative Examples 1 to 5 were produced by a conventional method, and their abrasion resistance and feeling in use were evaluated. The results are shown in Tables 1 and 2.

Comparative examples 6-7
Oil-in-water emulsified cosmetics of Comparative Examples 6 and 7 were produced by conventional methods, and evaluated for SPF, abrasion resistance, and feeling of use. The results are shown in Table 3.

The symbols in the table indicate the following, respectively.
*1: SW-8005 C30 Resin Wax (melting point: 63-71°C, manufactured by Dow Corning Toray)
*2: AMS-C30 Cosmetic Wax (melting point: 73-77°C, manufactured by Dow Corning Toray); effective content 55% by mass
*3: 670 Fluid (manufactured by Toray Dow Corning); effective content 50% by mass
*4: Silicone KSG-16 (manufactured by Shin-Etsu Chemical Co., Ltd.); effective content 25% by mass
*5: MZX-304OTS (average particle size: 0.035 μm, manufactured by Teika)
*6: MZ-504R3M (average particle size: 0.025 μm, manufactured by Teika)
*7: Uvinal MC-80 (manufactured by BASF)
*8: Ubinar A PLUS GRANULAR (manufactured by BASF)
*9: TINOSORB S (manufactured by BASF)
*10: KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.)
*11: Exepearl IPP (manufactured by Kao Corporation)
*12: Pearl Ream 4 (manufactured by NOF Corporation)
*13: Estemol N-01 (manufactured by Nisshin Oilio Group)
*14: FINSOLV TN (manufactured by Innospec Active Chemicals)
*15: DOWSIL SH 3775 M FLUID (manufactured by Dow Corning)
*16: TSF405A (manufactured by Momentive Performance Materials Japan LLC)
*17: SIMULGEL EG (manufactured by SEPPIC S.A.)
*18: Rheodor TW-S120V (manufactured by Kao Corporation)

Next, a formulation example of the water-in-oil emulsion cosmetic of the present invention will be shown. The resulting water-in-oil emulsion cosmetic has little stickiness after application, has excellent abrasion resistance, and is excellent as a sunscreen cosmetic.

The symbols in the table indicate the following.
*1: SW-8005 C30 Resin Wax (melting point: 63-71°C, manufactured by Dow Corning Toray)
*5: MZX-304OTS (average particle size: 0.035 μm, manufactured by Teika)
*7: Uvinal MC-80 (manufactured by BASF)
*8: Ubinar A PLUS GRANULAR (manufactured by BASF)
*9: TINOSORB S (manufactured by BASF)
*10: KF-96A-10CS (manufactured by Shin-Etsu Chemical Co., Ltd.)
*11: Exepearl IPP (manufactured by Kao Corporation)
*12: Pearl Ream 4 (manufactured by NOF Corporation)
*13: Estemol N-01 (manufactured by Nisshin Oilio Group)
*14: FINSOLV TN (manufactured by Innospec Active Chemicals)
*15: DOWSIL SH 3775 M FLUID (manufactured by Dow Corning)
*16: TSF405A (manufactured by Momentive Performance Materials Japan LLC)
*19: MT-100TV (average particle size: 0.015 μm, manufactured by Teika)
*20: SA-Talc JA-68R (manufactured by Miyoshi Kasei Co., Ltd.)
*21: Tospearl 145 (manufactured by Momentive Performance Materials Japan LLC)
*22: KF-96A-6CS (manufactured by Shin-Etsu Chemical Co., Ltd.)
*23: KF-6015 (manufactured by Shin-Etsu Chemical Co., Ltd.)

Claims (7)

Contains the following components (A), (B) and (C), and the alkyl-modified silicone wax of component (A) is one or two selected from alkyl methicone wax, alkyl dimethicone wax and silsesquioxane resin wax. The above is a water-in-oil emulsion cosmetic for sunscreen, in which component (B) is finely divided zinc oxide subjected to hydrophobization treatment .
(A) Alkyl-modified silicone wax with a melting point of 60°C or higher : 0.4% by mass or more and 16% by mass or less in cosmetics
(B) Hydrophobized ultraviolet scattering agent : 10% by mass or more and 30% by mass or less in cosmetics
(C) Water The water-in-oil emulsion cosmetic for sunscreen according to claim 1, wherein the content of component (A) in the cosmetic is 0.8% by mass or more and 16% by mass or less. The water-in-oil emulsion cosmetic for sunscreen according to claim 1 or 2, wherein the content of component (C) in the cosmetic is 1% by mass or more and 50% by mass or less. The water-in-oil emulsion cosmetic for sunscreen according to any one of claims 1 to 3 (crosslinked organopolysiloxane polymer is 0.1 to 10% by mass, and dimethiconol is 0.1 to 10% by mass) %, and water-in-oil emulsion cosmetics containing 1 to 20% by mass of polyhydric alcohol). The sunscreen according to any one of claims 1 to 4 , wherein the content mass ratio of component (A) to component (B) [(A)/(B)] is 0.005 or more and 1.67 or less. A water-in-oil emulsion cosmetic. The water-in-oil emulsion cosmetic for sunscreen according to any one of claims 1 to 5 , further comprising (D) an ultraviolet absorber. The water-in-oil emulsion cosmetic for sunscreen according to claim 6 , wherein the content of component (D) in the cosmetic is 6% by mass or more and 20% by mass or less.