Sunscreen cosmetics

Abstract

To provide a sunscreen cosmetic that has excellent UV protection effect even after the formed cosmetic coating has been heated or rubbed, and also spreads well on the skin during its application and can prevent unnatural whiteness of the skin after the application.SOLUTION: A sunscreen cosmetic contains the following components (A)-(D). (A): a polyglycerol modified silicone, (B): at least one selected from the group consisting of the following component (B1) and component (B2) (excluding the component (A)), where (B1) is a silicone dendrimer and (B2) is a silicone wax, (C): a UV protection agent and (D): water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a sunscreen cosmetic. [Background technology]

[0002] In recent years, as protection from ultraviolet rays in daily life has become increasingly important, the need for sunscreen cosmetics has also increased. In response to such market needs, sunscreen cosmetics that exhibit ultraviolet protection effects by incorporating ultraviolet scattering agents or ultraviolet absorbers have been developed. For example, Patent Document 1 discloses a cosmetic composition containing lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, a powder, an ultraviolet absorber, and one or more oils selected from silicone oil and ester oil, each having a viscosity within a specified range at 25°C, in a specified ratio, with the aim of providing a cosmetic composition that has excellent powder dispersibility even in the presence of an ultraviolet absorber, and that has good usability, spreadability, etc.

[0003] Furthermore, when the cosmetic coating film of a sunscreen cosmetic applied to the skin comes into contact with moisture such as water or sweat, the UV scattering agent and UV absorbing agent are leached from the cosmetic coating film, resulting in a problem of reduced UV protection effect. To overcome these problems, for example, Patent Document 2 discloses a water-breaking sunscreen cosmetic that is stable and water-resistant even when formulated with an ultraviolet scattering agent, spreads well due to smooth emulsion breakdown upon application, and feels good when used. The water-breaking sunscreen cosmetic comprises a water-in-oil emulsion containing, in specified proportions, one or more members selected from partially crosslinked polyether-modified silicones and partially crosslinked polyglycerin-modified silicones, a non-crosslinked silicone surfactant, an aqueous component, a hydrophobized ultraviolet scattering agent, and an oil agent having a viscosity at 25°C within a specified range. Furthermore, Patent Document 3 discloses an emulsion-type sunscreen cosmetic that has the property of improving its UV protection effect upon contact with water or sweat compared to immediately after application, and also has an excellent feel when used, and that contains 5 to 40% by mass of an UV protection agent and at least one oil phase thickener, and in which the absorbance of a coating film formed from the cosmetic after contact with water is higher than the absorbance before contact with water. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2020-40994 [Patent Document 2] International Publication No. 2019 / 004048 [Patent Document 3] Japanese Patent Publication No. 2020-158535 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the technologies of Patent Documents 1 to 3, it has been found that the cosmetic coating film formed by applying a sunscreen cosmetic to the skin is heated by the temperature rise caused by sunlight irradiation (hereinafter simply referred to as "heating"), resulting in a decrease in UV protection efficacy compared to immediately after application. It has also been found that friction also reduces the UV protection efficacy, possibly because the cosmetic coating film is easily deformed and broken down by friction. On the other hand, there is also a demand for improved usability, such as improved spreadability when applied to the skin and suppression of whitening after application to the skin (hereinafter also referred to as "white cast"). The present invention addresses the problem of providing a sunscreen cosmetic that has an excellent ultraviolet protection effect even after heating and rubbing of the cosmetic coating film formed, spreads well on the skin, and can suppress white cast after application to the skin. [Means for solving the problem]

[0006] The present inventors have discovered that the above-mentioned problems can be solved by providing a sunscreen cosmetic that contains at least one member selected from the group consisting of polyglycerin-modified silicones, silicone dendrimers, and silicone waxes, an ultraviolet protection agent, and water. That is, the present invention provides a sunscreen cosmetic composition containing the following components (A) to (D): (A): Polyglycerin-modified silicone (B): At least one selected from the group consisting of the following components (B1) and (B2) (excluding component (A)): (B1): Silicone dendrimer (B2): Silicone wax (C): UV protection agent (D):Water [Effects of the Invention]

[0007] The present invention can provide a sunscreen cosmetic that has an excellent UV protection effect even after heating and rubbing of the cosmetic coating film formed, has good spreadability when applied to the skin, and can suppress white cast after application to the skin. DETAILED DESCRIPTION OF THE INVENTION

[0008] [Sunscreen cosmetics] The sunscreen cosmetic of the present invention (hereinafter also referred to as "sunscreen cosmetic") contains the following components (A) to (D). (A): Polyglycerin-modified silicone (B): At least one selected from the group consisting of the following components (B1) and (B2) (excluding component (A)): (B1): Silicone dendrimer (B2): Silicone wax (C): UV protection agent (D):Water In this specification, the UV protection effect of a cosmetic coating film formed by applying a sunscreen cosmetic after the cosmetic coating film has been heated is also referred to as "heat resistance," and the UV protection effect of a cosmetic coating film formed by applying a sunscreen cosmetic after the cosmetic coating film has been rubbed is also referred to as "rubbing resistance."

[0009] The sunscreen cosmetic of the present invention has an excellent UV protection effect even after the cosmetic coating film formed thereon is heated and rubbed, and spreads well on the skin when applied, thereby preventing the appearance of a white cast after application to the skin. The reasons for this are unclear, but are thought to be as follows. The polyglycerin-modified silicone contained in the sunscreen cosmetic of the present invention has a hydrophilic polyglycerin chain and a hydrophobic silicone chain, and because the polyglycerin chain is thermally stable, it is thought that the cosmetic coating film formed can efficiently scatter or absorb UV rays even after heating and rubbing, thereby improving heat resistance and rubbing resistance. Furthermore, it is thought that at least one member selected from the group consisting of silicone dendrimers and silicone waxes can improve the strength of the cosmetic coating film formed, further improve rubbing resistance, and improve spreadability when applied to the skin.

[0010] <Component (A): Polyglycerin-modified silicone> The sunscreen cosmetic of the present invention contains a polyglycerin-modified silicone as component (A) from the viewpoints of emulsion stability and improving the heat resistance and abrasion resistance of the cosmetic coating film. From the same viewpoint as above, component (A) is a silicone having a polyglycerin chain as a hydrophilic site in the molecule. The polyglycerin chain may be introduced at any position, and may be introduced at one end, both ends, or in a side chain. Component (A) may be used alone or in combination of two or more types. Among these, from the same viewpoint as above, component (A) is preferably one having a polyglycerin chain on a side chain or at an end of the silicone chain, and more preferably a silicone having a monovalent polyglyceryl group on a side chain or at an end of the silicone chain.

[0011] The polyglyceryl group of component (A) is preferably a group containing a glycerin unit (C3H6O2) represented by the following formula (1): [ka] [In formula (1), R 1 is a divalent organic group, and n is the number of repeating glycerin units.

[0012] In the formula (1), R 1 is preferably at least one organic group selected from the group consisting of the following formulae (a-1) to (a-4): [ka] [In formulas (a-1) to (a-4), R 11 are each independently a linear or branched alkanediyl group (alkylene group) or alkenylene group having from 2 to 22 carbon atoms, or an arylene group having from 6 to 22 carbon atoms, which may have a substituent.

[0013] Among these, R 1 is more preferably an organic group represented by the formula (a-1), and even more preferably R 11 is a linear or branched alkanediyl group (alkylene group) having from 2 to 22 carbon atoms, and more preferably R 11 is a linear or branched alkanediyl group (alkylene group) having from 2 to 16 carbon atoms, and more preferably R 11 is a linear or branched alkanediyl group (alkylene group) having from 2 to 8 carbon atoms, and more preferably R 11 is a linear or branched alkanediyl group (alkylene group) having 2 to 4 carbon atoms, and more preferably R 11 is an ethanediyl group (ethylene group) or a propanediyl group (propylene group), and more preferably R2 is a propanediyl group (propylene group).

[0014] In the formula (1), the specific structure of the glycerin unit (C3H6O2) can be at least one structure selected from the group consisting of the following formulas (b-1) to (b-3): Among these, the specific structure of the glycerin unit (C3H6O2) in the formula (1) is preferably the following formula (b-1). [ka]

[0015] The average value of the number of repeating units n of the glycerin units constituting the polyglyceryl group is, from the viewpoint of emulsion stability and improving the heat resistance and abrasion resistance of the cosmetic coating film, preferably 1 or more, more preferably 1.5 or more, even more preferably 2 or more, still more preferably 2.5 or more, and is preferably 20 or less, more preferably 15 or less, even more preferably 10 or less, still more preferably 5 or less, still more preferably 4.4 or less, still more preferably 4 or less, still more preferably 3.4 or less. The number of polyglyceryl groups introduced into component (A) is arbitrary, and may be one or two or more per molecule.

[0016] The silicone chain of component (A) may be either linear or branched from the viewpoints of emulsion stability and improving the heat resistance and abrasion resistance of the cosmetic coating film, but is preferably a branched silicone chain, and more preferably a branched silicone chain having a group represented by the following formula (2-1) or (2-2) as a side chain. [ka] [In formula (2-1), R 2 each independently represents a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms, p is a number of 2 to 10, and m is a number of 1 to 500. [ka] [In formula (2-2), R 2 and m are the same as in formula (2-1).

[0017] In the formulas (2-1) and (2-2), R 2 Specific examples or preferred embodiments of p and m are as follows, from the viewpoint of emulsion stability and improving the heat resistance and abrasion resistance of the decorative coating film. In the formulas (2-1) and (2-2), R 2 is preferably a hydrocarbon group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 3 carbon atoms, even more preferably a methyl group or an ethyl group, and even more preferably a methyl group. In the formula (2-1), p is preferably 2 or 3, and more preferably 2. In the formula (2-1), m is preferably 2 or more, more preferably 3 or more, and preferably 100 or less, more preferably 50 or less, even more preferably 30 or less, still more preferably 20 or less, still more preferably 15 or less, and still more preferably 10 or less. In the formula (2-2), m is preferably 1 or more, and preferably 100 or less, more preferably 50 or less, even more preferably 30 or less, still more preferably 10 or less, still more preferably 5 or less, still more preferably 3 or less, and still more preferably 1.

[0018] Component (A) may be a polyglycerin-modified silicone modified with an organic group other than a polyglycerin group, provided that the effects of the present invention are not impaired. Examples of organic groups other than a polyglycerin group include alkyl groups, alkoxy groups, (meth)acrylic groups, silicone dendron groups, epoxy groups, acyl groups, ester groups, and mercapto groups. From the viewpoints of emulsion stability and improving the heat resistance and abrasion resistance of the decorative coating film, it is preferable that component (A) does not have a polyoxyalkylene structure.

[0019] From the viewpoint of emulsion stability and improving the heat resistance and abrasion resistance of the cosmetic coating film, component (A) is preferably a polyglycerin-modified silicone represented by the following formula (3). [ka] [In formula (3), R 31 is a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, and R 32 is a group represented by the formula (2-1) or (2-2), and R 33 is a polyglyceryl group containing a glycerin unit (C3H6O2) represented by the formula (1). a, b, and c are the number of repeating units of each organosiloxane unit.

[0020] In the formula (3), R 31 ~R 33 Specific examples or preferred embodiments of a, b, and c are as follows, from the viewpoint of emulsion stability and improving the heat resistance and abrasion resistance of the decorative coating film. In the formula (3), R 31 is preferably a hydrocarbon group having from 1 to 30 carbon atoms, more preferably a linear or branched chain alkyl group having from 1 to 6 carbon atoms, a linear or branched chain alkyl group having from 7 to 30 carbon atoms, or an aryl group having from 6 to 22 carbon atoms, even more preferably a linear or branched chain alkyl group having from 1 to 6 carbon atoms, or a linear or branched chain alkyl group having from 7 to 30 carbon atoms, and still more preferably a linear or branched chain alkyl group having from 1 to 6 carbon atoms, or a linear or branched chain alkyl group having from 7 to 22 carbon atoms. In the formula (3), R 32 are the same as the preferred embodiments of the groups represented by the formulae (2-1) and (2-2), and are even more preferably the following formula (2-1') or (2-2'). [ka] [ka] (In formula (2-1′) and formula (2-2′), m is the same as in formula (2-1).)

[0021] In the formula (2-1'), m is preferably 2 or more, more preferably 3 or more, and preferably 100 or less, more preferably 50 or less, even more preferably 30 or less, still more preferably 20 or less, even more preferably 15 or less, and even more preferably 10 or less. In the formula (2-2'), m is preferably 1 or more, and preferably 100 or less, more preferably 50 or less, even more preferably 30 or less, even more preferably 10 or less, even more preferably 5 or less, even more preferably 3 or less, and even more preferably 1.

[0022] In the formula (3), R 33 is preferably the following formula (1'). [ka] (In formula (1'), n is the same as in formula (1).) In the formula (1'), the average value of the number of repeating units n of glycerin units is preferably 1 or more, more preferably 1.5 or more, even more preferably 2 or more, and still more preferably 2.5 or more, and is preferably 20 or less, more preferably 15 or less, even more preferably 10 or less, still more preferably 5 or less, still more preferably 4.4 or less, still more preferably 4 or less, and still more preferably 3.4 or less.

[0023] In the formula (3), the total number of repeating units of a, b, and c is preferably 1 or more and 160 or less. In the formula (3), a is preferably 0 or more and 100 or less, more preferably 1 or more and 50 or less, even more preferably 1 or more and 10 or less, still more preferably 1 or more and 5 or less, and even more preferably 1 or more and 3 or less. In the formula (3), b is preferably 0 or more and 30 or less, more preferably 0.01 or more and 30 or less, even more preferably 0.01 or more and 10 or less, still more preferably 0.02 or more and 5 or less, and even more preferably 0.02 or more and 3 or less. In the formula (3), c is preferably 0 or more and 30 or less, more preferably 0.01 or more and 30 or less, even more preferably 0.01 or more and 10 or less, still more preferably 0.02 or more and 5 or less, and even more preferably 0.02 or more and 3 or less.

[0024] Specific preferred examples of component (A) include polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, and cetyl diglyceryl tris(trimethylsiloxy)silylethyl dimethicone. Among these, component (A) is preferably at least one selected from the group consisting of polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone, and cetyl diglyceryl tris(trimethylsiloxy)silylethyl dimethicone, and more preferably at least one selected from the group consisting of polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone.

[0025] Commercially available products of component (A) include, for example, "KF-6100," "KF-6104," "KF6106," and "KF-6105" manufactured by Shin-Etsu Chemical Co., Ltd.; and "DOWSI ES-5600 Silicone Glycerol Emulsifier" manufactured by Dow Chemical Japan, Ltd.

[0026] The content of component (A) in the sunscreen cosmetic of the present invention is preferably 0.3% by mass or more, more preferably 0.5% by mass or more, and even more preferably 0.7% by mass or more, from the viewpoint of emulsion stability and from the viewpoint of improving the heat resistance and abrasion resistance of the cosmetic coating film; and from the viewpoint of improving the heat resistance of the cosmetic coating film, it is preferably 10% by mass or less, more preferably 8% by mass or less, even more preferably 6% by mass or less, even more preferably 4% by mass or less, still more preferably 2.5% by mass or less, still more preferably 2% by mass or less, and even more preferably 1.5% by mass or less. More specifically, the content of component (A) in the sunscreen cosmetic of the present invention is preferably from 0.3 to 10% by mass, more preferably from 0.3 to 8% by mass, even more preferably from 0.3 to 6% by mass, still more preferably from 0.3 to 4% by mass, still more preferably from 0.3 to 2.5% by mass, even more preferably from 0.3 to 2% by mass, still more preferably from 0.5 to 1.5% by mass, and still more preferably from 0.7 to 1.5% by mass.

[0027] <Component (B): At least one selected from the group consisting of component (B1) and component (B2)> The sunscreen cosmetic of the present invention contains, as component (B), at least one selected from the group consisting of the following components (B1) and (B2) (excluding component (A)) from the viewpoint of improving the abrasion resistance of the cosmetic coating film. (B1): Silicone dendrimer (B2): Silicone wax In the present invention, the component that is a polyglycerin-modified silicone and has a silicone dendrimer structure, and the component that is a polyglycerin-modified silicone and a silicone wax are referred to as component (A).

[0028] [Component (B1): Silicone dendrimer] Component (B1) is not particularly limited as long as it has a silicone dendrimer structure other than component (A). Component (B1) may be used alone or in combination of two or more. The siloxane dendrimer structure of component (B1) is preferably a group represented by the following formula (4), from the viewpoint of improving the spreadability during application and improving the abrasion resistance of the decorative coating film. [ka] [In formula (4), R 41 are each independently a hydrocarbon group having 1 to 6 carbon atoms. 1 is a single bond or a divalent organic group. 1 is a group represented by the following formula (5) when i=1, and i is an integer of 1 to 10 indicating the generation of the group. [ka] [In formula (5), R 41 is the same as above, and R 42 is an alkyl group having 1 to 10 carbon atoms. 2 is an alkylene group having 2 to 10 carbon atoms. i+1 is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, an aryl group, or a group represented by formula (5), i is an integer between 0 and 3.

[0029] In the formula (4), R 41 is preferably an alkyl group having 1 to 6 carbon atoms or a phenyl group, more preferably an alkyl group having 1 to 3 carbon atoms, and even more preferably a methyl group, from the viewpoint of improving the spreadability during application and improving the abrasion resistance of the decorative coating film.

[0030] Among these, component (B1) is preferably an acrylic polymer having a siloxane dendrimer structure in the side chain (hereinafter also referred to as "acrylic silicone dendrimer") from the viewpoint of improving the spreadability during application and improving the abrasion resistance of the decorative coating film. Examples of acrylic silicone dendrimers include polymers containing structural units derived from a monomer represented by the following formula (6). [ka] [In formula (6), R 41 and X 1 is the same as above. Y is a (meth)acryloyl group. The acrylic silicone dendrimer may further contain a constituent unit derived from a (meth)acrylic monomer other than the monomer represented by the formula (6).

[0031] Commercially available products of component (B1) include "FA 4001 CM Silicone Acrylate" (a solution of acrylates / polytrimethylsiloxy methacrylate copolymer in cyclopentasiloxane), "FA 4002 ID Silicone Acrylate" (a solution of acrylates / polytrimethylsiloxy methacrylate copolymer in isododecane), and "DOWSIL FA 4003 DM Silicone Acrylate" (a solution of acrylates / polytrimethylsiloxy methacrylate copolymer in dimethicone (2cs)), all manufactured by Dow Chemical Japan.

[0032] [Component (B2): Silicone wax] Component (B2) is a silicone wax other than component (A), and is preferably an alkyl-modified silicone wax from the viewpoint of improving the abrasion resistance of the decorative coating film. The component (B2) may be used alone or in combination of two or more.

[0033] As the alkyl-modified silicone wax, a wax in which dimethylpolysiloxane is modified with an alkyl group having 9 to 80 carbon atoms is preferred from the viewpoint of improving the abrasion resistance of the decorative coating film. The 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, even more preferably 24 or more, and preferably 70 or less, more preferably 60 or less, even more preferably 50 or less. More specifically, the number of carbon atoms in the alkyl group is preferably 16 or more and 70 or less, more preferably 20 or more and 60 or less, even more preferably 24 or more and 50 or less. The position at which the alkyl group is introduced is arbitrary, and the form of introduction may be one-terminal, both-terminal, side chain, etc. The number of alkyl groups introduced is also arbitrary, and may be one or two or more in a molecule. When the number of alkyl groups introduced is two or more, the two or more alkyl groups may be the same or different. A mixture of silicone waxes modified with different alkyl groups may also be used.

[0034] From the viewpoint of improving the rub resistance of the decorative coating film, the melting point of component (B2) is preferably 50° C. or higher, more preferably 55° C. or higher, even more preferably 60° C. or higher, and preferably 120° C. or lower, more preferably 90° C. or lower, even more preferably 80° C. or lower. More specifically, the melting point of component (B2) is preferably 50° C. or higher and 120° C. or lower, more preferably 55° C. or higher and 90° C. or lower, even more preferably 60° C. or higher and 80° C. or lower. The melting point of component (B2) is measured in accordance with JIS K 0064.

[0035] The alkyl-modified silicone wax is preferably an oil-soluble alkyl-modified silicone wax. Examples of oil-soluble alkyl-modified silicone waxes include alkyl methicone wax, alkyl dimethicone wax, and silsesquioxane resin wax, and one or more of these may be used in combination. Among these, from the viewpoints of smoothness, non-stickiness, etc., at least one wax selected from the group consisting of alkyl methicone wax and silsesquioxane resin wax is preferred.

[0036] Commercially available products of component (B2) include, for example, "AMS-C30 Cosmetic Wax" (alkyl (C30-45) methicone, melting point 73-77°C) and "SW-8005 C30 Resin Wax" (alkyl (C30-45) dimethylsilyl polypropylsilsesquioxane, melting point 63-71°C) manufactured by Dow Chemical Japan; "SF-1642" (alkyl (C30-45) dimethicone, melting point 60-70°C) manufactured by Momentive Performance Materials Japan, LLC; and "BELSIL CM 7026 VP" (alkyl (C26-28) methicone, melting point 70°C) manufactured by Wacker Asahi Kasei Silicones Co., Ltd.

[0037] The content of component (B) in the sunscreen cosmetic of the present invention is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, even more preferably 0.7% by mass or more, and even more preferably 1% by mass or more, from the viewpoint of improving the rub resistance of the cosmetic coating film, and is preferably 10% by mass or less, more preferably 6% by mass or less, and even more preferably 3% by mass or less, from the viewpoint of improving the spreadability upon application, suppressing white cast after application, and improving the rub resistance of the cosmetic coating film. More specifically, the content of component (B) in the sunscreen cosmetic of the present invention is preferably 0.1% by mass or more and 10% by mass or less, more preferably 0.3% by mass or more and 10% by mass or less, even more preferably 0.7% by mass or more and 6% by mass or less, and even more preferably 1% by mass or more and 3% by mass or less.

[0038] The mass ratio of the content of component (A) to the content of component (B) in the sunscreen cosmetic of the present invention [(A) / (B)] is preferably 0.1 or more, more preferably 0.2 or more, and even more preferably 0.3 or more, from the viewpoints of improving spreadability during application, suppressing white cast after application, and improving the rub resistance of the cosmetic coating film, and from the viewpoints of improving the rub resistance of the cosmetic coating film, it is preferably 5 or less, more preferably 3 or less, even more preferably 2.5 or less, even more preferably 2 or less, still more preferably 1.7 or less, even more preferably 1.3 or less, and even more preferably 0.7 or less. More specifically, it is preferably 0.1 or more and 5 or less, more preferably 0.1 or more and 3 or less, more preferably 0.2 or more and 2.5 or less, even more preferably 0.3 or more and 2 or less, still more preferably 0.3 or more and 1.7 or less, still more preferably 0.3 or more and 1.3 or less, and even more preferably 0.3 or more and 0.7 or less.

[0039] The total content of components (A) and (B) in the sunscreen cosmetic of the present invention is preferably at least 0.6% by mass, more preferably at least 1% by mass, even more preferably at least 1.7% by mass, still more preferably at least 2% by mass, and is preferably at most 20% by mass, more preferably at most 15% by mass, even more preferably at most 10% by mass, still more preferably at most 7% by mass, still more preferably at most 4% by mass, and still more preferably at most 3% by mass, from the viewpoints of emulsion stability, improving spreadability upon application, suppressing white cast after application, and improving the heat resistance and rub resistance of the cosmetic coating film. More specifically, the total content of components (A) and (B) in the sunscreen cosmetic of the present invention is preferably at least 0.6% by mass and at most 20% by mass, more preferably at least 1% by mass and at most 15% by mass, even more preferably at least 1.7% by mass and at most 10% by mass, still more preferably at most 2% by mass and at most 7% by mass, still more preferably at most 2% by mass and at most 4% by mass, and still more preferably at most 2% by mass and at most 3% by mass.

[0040] <Ingredient (C): UV protection agent> The sunscreen cosmetic of the present invention contains an ultraviolet protection agent as component (C) from the viewpoint of scattering or absorbing ultraviolet rays, enhancing the ultraviolet protection effect, and improving heat resistance and abrasion resistance. Component (C) is preferably at least one selected from the group consisting of an ultraviolet scattering agent (hereinafter also referred to as "component (C1)") and an ultraviolet absorber (hereinafter also referred to as "component (C2)"), from the viewpoint of scattering or absorbing ultraviolet rays, enhancing the ultraviolet protection effect, and improving heat resistance and abrasion resistance.

[0041] [Component (C1): UV scattering agent] Component (C1) is preferably an inorganic particle, more preferably a fine particle metal oxide, from the viewpoints of scattering ultraviolet rays, enhancing the ultraviolet protection effect, and improving heat resistance and abrasion resistance. Component (C1) can be used alone or in combination of two or more types. The fine particle metal oxide used as component (C1) is preferably at least one selected from the group consisting of fine particle zinc oxide, fine particle titanium oxide, and fine particle cerium oxide, more preferably at least one selected from the group consisting of fine particle zinc oxide and fine particle titanium oxide, from the viewpoints of scattering ultraviolet rays, enhancing the ultraviolet protection effect, and improving heat resistance and abrasion resistance. Furthermore, these fine particle metal oxides can contain divalent or higher metals, and metals such as iron, zirconium, calcium, manganese, magnesium, yttrium, and the like, or oxides thereof, can be contained in the fine particle metal oxide, either alone or in appropriate combinations of two or more.

[0042] From the viewpoints of enhancing the UV protection effect, improving heat resistance and abrasion resistance, and improving emulsion stability, the average primary particle size of component (C1) is preferably less than 100 nm, more preferably 90 nm or less, even more preferably 70 nm or less, and even more preferably 50 nm or less, and is preferably 1 nm or more, more preferably 3 nm or more, and even more preferably 5 nm or more. More specifically, from the same viewpoints as above, the average primary particle size of component (C1) is preferably 1 nm or more and 90 nm or less, more preferably 1 nm or more and 70 nm or less, even more preferably 1 nm or more and 50 nm or less, even more preferably 3 nm or more and 5 ...

[0043] The shape of component (C1) may be, for example, spherical, flaky, rod-like, spindle-like, needle-like, or irregular, but any shape can be used as long as the average primary particle size is within the above range. The average primary particle size of component (C1) in the present invention can be determined from an image observed with a transmission electron microscope (TEM). Specifically, the average primary particle size is determined by observing the particles with a TEM at a magnification of 50,000x, measuring the maximum minor axis of 300 primary particles in the observed image, and calculating the number average value. Here, the maximum minor axis refers to the longest minor axis among the minor axes perpendicular to the major axis when component (C1) has a shape other than a flaky shape. Furthermore, when component (C1) has a flaky shape, the average primary particle size is determined by measuring the thickness of 300 primary particles in the observed image observed under the same conditions as above and calculating the number average value. Specifically, the average primary particle size is determined by the method described in the examples.

[0044] The fine particle metal oxide used as component (C1) is preferably a fine particle metal oxide that has been hydrophobized, from the viewpoints of increasing the dispersibility of component (C1) in the sunscreen cosmetic, emulsion stability, improving spreadability upon application, suppressing whitening after application, and improving the heat resistance and abrasion resistance of the cosmetic coating film. In the present invention, the term "hydrophobized fine particle metal oxide" refers to a fine particle metal oxide whose surface has been hydrophobized. Examples of hydrophobic treatments for component (C1) include silicone treatment, alkylalkoxysilane treatment, fatty acid treatment, fluorine-containing compound treatment using perfluoroalkyl phosphate esters, perfluoroalcohols, etc., amino acid treatment using N-acyl glutamic acid, etc., lecithin treatment, metal soap treatment, alkyl phosphate ester treatment, and ASI treatment using N-acyl amino acid metal salts (sodium lauroyl aspartate), zinc chloride, and alkoxytitanium alkylate (isopropyl titanium triisostearate). These surface treatments may be used alone or in combination of two or more. Among these, from the viewpoints of increasing the dispersibility of component (C1) in the sunscreen cosmetic, emulsion stability, improving spreadability upon application, suppressing white cast after application, and improving the heat resistance and abrasion resistance of the cosmetic coating film, at least one treatment selected from the group consisting of silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment is preferred.

[0045] Examples of surface treatment agents used in silicone treatment include various silicone oils such as methylpolysiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, methylcyclopolysiloxane, dodecamethylcyclohexasiloxane, tetradecamethylhexasiloxane, dimethylsiloxane / methyl(polyoxyethylene)siloxane / methyl(polyoxypropylene)siloxane copolymer, dimethylsiloxane / methyl(polyoxyethylene)siloxane copolymer, dimethylsiloxane / methyl(polyoxypropylene)siloxane copolymer, dimethylsiloxane / methylcetyloxysiloxane copolymer, dimethylsiloxane / methylstearoxysiloxane copolymer, and (alkyl acrylate / dimethicone) copolymer. The surface treatment agents used in silicone treatment may be used alone or in combination of two or more. Among these, at least one selected from the group consisting of methylhydrogenpolysiloxane and dimethylpolysiloxane is preferred from the viewpoints of increasing the dispersibility of component (C1) in the sunscreen cosmetic, emulsion stability, improving spreadability upon application, suppressing white cast after application, and improving the heat resistance and abrasion resistance of the cosmetic coating film.

[0046] The surface treatment agent used in the alkylalkoxysilane treatment preferably has a linear or branched alkyl group having from 6 to 20 carbon atoms, and is more preferably at least one selected from the group consisting of octyltriethoxysilane and octyltrimethoxysilane, from the viewpoints of increasing the dispersibility of component (C1) in the sunscreen cosmetic, emulsion stability, improving spreadability during application, suppressing white cast after application, and improving the heat resistance and abrasion resistance of the cosmetic coating film.

[0047] Examples of surface treatment agents used in the fatty acid treatment include linear or branched higher fatty acids having from 12 to 22 carbon atoms. Among these, from the viewpoints of increasing the dispersibility of component (C1) in the sunscreen cosmetic, improving the UV protection effect, emulsion stability, and spreadability upon application, and suppressing white cast after application, linear or branched higher fatty acids having from 14 to 22 carbon atoms are preferred, linear or branched higher fatty acids having from 16 to 20 carbon atoms are more preferred, and at least one selected from the group consisting of stearic acid and isostearic acid are even more preferred.

[0048] The amount of hydrophobization treatment in component (C1) is preferably at least 0.1% by mass, and preferably at most 40% by mass, more preferably at most 30% by mass, based on the total mass of component (C1), from the viewpoints of increasing the dispersibility of component (C1) in the sunscreen cosmetic, emulsion stability, improving spreadability upon application, suppressing whitening after application, and improving the heat resistance and abrasion resistance of the cosmetic coating film. In the present invention, when component (C1) has been subjected to a hydrophobic treatment, the mass and average primary particle size of component (C1) mean the mass and average primary particle size including the surface treatment agent.

[0049] From the viewpoints of improving transparency when applied to the skin and suppressing white cast after application, component (C1) preferably contains hydrophobically treated fine particle zinc oxide. When component (C1) contains hydrophobically treated fine particle zinc oxide, from the same viewpoints as above, the content of hydrophobically treated fine particle zinc oxide in component (C1) is preferably 50% by mass or more, more preferably 55% by mass or more, even more preferably 60% by mass or more, and still more preferably 65% ​​by mass or more. From the viewpoint of ultraviolet protection effect, component (C1) preferably contains hydrophobized titanium dioxide fine particle. When component (C1) contains hydrophobized titanium dioxide fine particle, the content of hydrophobized titanium dioxide fine particle in component (C1) is preferably 50 mass % or more, more preferably 55 mass % or more, even more preferably 60 mass % or more, and still more preferably 65 mass % or more, from the same viewpoint as above.

[0050] Component (C1) can be prepared by a known method using the surface treatment agent described above for component (C1') from a fine particle metal oxide before hydrophobization treatment. For example, as described in Japanese Patent No. 3187440, the surface treatment using silicone oil can be performed by coating a fine particle metal oxide such as fine particle zinc oxide with at least one silicone compound (excluding silane compounds) composed of organopolysiloxanes and silicone resins in a non-gas phase, followed by baking at a temperature of 600 to 950 °C in an oxygen-containing atmosphere to coat the surface of the fine particle metal oxide with silicon oxide. As described in Japanese Patent Laid-Open No. 2007-326902, the surface treatment using alkylalkoxysilane can be performed by coating a fine particle metal oxide with a specific polysiloxane compound, followed by surface treatment with alkylalkoxysilane in water. The preferred embodiment and measurement method of the average primary particle size of component (C1') (fine particle metal oxide before hydrophobization treatment) used in the above-mentioned hydrophobization treatment are the same as the preferred embodiment and measurement method of component (C1).

[0051] Commercially available hydrophobically treated zinc oxide particles include the FINEX series (manufactured by Sakai Chemical Industry Co., Ltd.), the MZ series, and the MZY series (all manufactured by Teika Corporation). Commercially available hydrophobically treated titanium dioxide particles include the STR series (manufactured by Sakai Chemical Industry Co., Ltd.), TTO-55 series, TTO-51 series (all manufactured by Ishihara Sangyo Kaisha, Ltd.), MT series, and MTY series (all manufactured by Teika Corporation).

[0052] [Component (C2): UV absorber] The component (C2) is preferably at least one organic ultraviolet absorber selected from the group consisting of liquid organic ultraviolet absorbers and solid organic ultraviolet absorbers. As used herein, "liquid" refers to a state that has fluidity under an environment of 1 atmosphere and 25°C, i.e., a state under temperature conditions of the melting point or higher (for amorphous substances that do not have a melting point, a state under temperature conditions of the melting point or higher). Also, "solid" refers to a state that does not have fluidity under an environment of 1 atmosphere and 25°C, i.e., a state under temperature conditions below the melting point (for amorphous substances that do not have a melting point, a state under temperature conditions below the melting point).

[0053] Liquid organic UV absorbers include cinnamic acid-based UV absorbers such as 2-ethylhexyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, isopropyl paramethoxycinnamate-diisopropyl cinnamate mixture, and methyl bis(trimethylsiloxy)silylisopentyl trimethoxycinnamate; para-aminobenzoic acid-based UV absorbers such as amyl paradimethylaminobenzoate and 2-ethylhexyl paradimethylaminobenzoate; salicylic acid-based UV absorbers such as ethylene glycol salicylate, 2-ethylhexyl salicylate, benzyl salicylate, and homomenthyl salicylate; octocrylene; and dimethicodiethyl benzalmalonate. Examples of solid organic ultraviolet absorbers include 2-(4-diethylamino-2-hydroxybenzoyl)benzoic acid hexyl ester, 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, 4-tert-butyl-4'-methoxydibenzoylmethane, and 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidinepropionate.

[0054] Commercially available products of component (C2) include, for example, "UVINUL MC80" (2-ethylhexyl paramethoxycinnamate), "UVINUL A PLUS" (2-(4-diethylamino-2-hydroxybenzoyl)benzoic acid hexyl ester), "TINOSORB S" (2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine), and "UVINUL T-150" (2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine) (all manufactured by BASF); "Soft Shade DH" (2-ethylhexyl dimethoxybenzylidene dioxoimidazolidinepropionate) (manufactured by Ajinomoto Co., Inc.); "PARSOL 1789" (4-tert-butyl-4'-methoxydibenzoylmethane), and PARSOL SLX (polysilicone-15 (dimethicone diethyl benzal malonate)) (all manufactured by DSM) is an example.

[0055] The content of component (C) in the sunscreen cosmetic of the present invention is preferably 3% by mass or more, more preferably 5% by mass or more, and even more preferably 7% by mass or more, from the viewpoints of enhancing the UV protection effect and improving heat resistance and abrasion resistance, and is preferably 45% by mass or less, more preferably 40% by mass or less, and even more preferably 35% by mass or less, from the viewpoints of emulsion stability, improving spreadability upon application, and suppressing white cast after application. More specifically, the content of component (C1) in the sunscreen cosmetic of the present invention is preferably 3% by mass or more and 45% by mass or less, more preferably 5% by mass or more and 45% by mass or less, more preferably 5% by mass or more and 40% by mass or less, even more preferably 5% by mass or more and 35% by mass or less, and even more preferably 7% by mass or more and 35% by mass or less.

[0056] When the sunscreen cosmetic of the present invention contains component (C1) as component (C), the content of component (C1) in the sunscreen cosmetic of the present invention is preferably 5% by mass or more, more preferably 10% by mass or more, even more preferably 20% by mass or more, and even more preferably 25% by mass or more, from the viewpoints of increasing the UV protection effect and improving heat resistance and abrasion resistance, and is preferably 45% by mass or less, more preferably 40% by mass or less, and even more preferably 35% by mass or less, from the viewpoints of increasing the dispersibility of component (C1) in the sunscreen cosmetic, emulsion stability, improving spreadability upon application, and suppressing white cast after application. More specifically, the content of component (C1) in the sunscreen cosmetic of the present invention is preferably 5% by mass or more and 45% by mass or less, more preferably 10% by mass or more and 40% by mass or less, even more preferably 20% by mass or more and 35% by mass or less, and even more preferably 25% by mass or more and 35% by mass or less. When the sunscreen cosmetic of the present invention contains component (C2) as component (C), the content of component (C2) in the sunscreen cosmetic of the present invention is preferably 3% by mass or more, more preferably 5% by mass or more, even more preferably 7% by mass or more, and preferably 30% by mass or less, more preferably 20% by mass or less, even more preferably 15% by mass or less. More specifically, the content of component (C2) in the sunscreen cosmetic of the present invention is preferably 3% by mass or more and 30% by mass or less, more preferably 5% by mass or more and 20% by mass or less, even more preferably 7% by mass or more and 15% by mass or less.

[0057] Furthermore, from the viewpoint of reducing the burden on the skin, the content of component (C2) in the sunscreen cosmetic of the present invention is preferably less than 3% by mass, more preferably less than 2% by mass, even more preferably less than 1% by mass, still more preferably less than 0.5% by mass, and even more preferably 0% by mass, i.e., no ultraviolet absorber is contained. Even when the content of the UV absorber is within the above-mentioned range, the sunscreen cosmetic of the present invention has an excellent UV protection effect even after heating and rubbing of the cosmetic coating film, and can exhibit the excellent effects of spreading well on the skin and suppressing white cast after application to the skin. From this perspective, the sunscreen cosmetic of the present invention can be applied to non-chemical sunscreen cosmetics that do not contain organic UV absorbers, which have been attracting attention in recent years as cosmetics that are gentle on the skin.

[0058] <Ingredient (D): Water> The sunscreen cosmetic of the present invention contains water as component (D) from the viewpoints of emulsion stability, improving spreadability upon application, and suppressing white cast after application. The content of component (D) in the sunscreen cosmetic of the present invention is preferably at least 0.5% by mass, more preferably at least 0.7% by mass, and even more preferably at least 1% by mass, from the viewpoints of emulsion stability, improving spreadability upon application, and suppressing white cast after application, and from the same viewpoints as above, is preferably at most 10% by mass, more preferably at most 5% by mass, and even more preferably at most 3% by mass. More specifically, the content of component (D) in the sunscreen cosmetic of the present invention is preferably from 0.5 to 10% by mass, more preferably from 0.7 to 5% by mass, and even more preferably from 1 to 3% by mass.

[0059] <Component (E): Oil> The sunscreen cosmetic of the present invention preferably further contains (E): an oil, from the viewpoint of improving emulsion stability. Component (E) may be volatile or non-volatile, and may be used alone or in combination of two or more types. In this specification, "volatile" means that the amount of evaporation at 25°C for 6 hours is 20% or more, as measured by the following method, and "non-volatile" means that the amount of evaporation at 25°C for 6 hours is less than 20%, as measured by the following method. Measurement method: Place a 90mm diameter filter paper in a 120mm diameter glass dish, place 1g of sample on the filter paper, and store in a room at 65% RH (25°C) for 6 hours. Measure the mass of the sample before and after storage, and calculate the amount of evaporation using the following formula. Evaporation amount (%) = (sample mass before storage - sample mass after storage) / sample mass before storage x 100

[0060] Component (E) is preferably a volatile or non-volatile liquid or solid oil, more preferably a volatile or non-volatile liquid oil, such as a silicone oil, an ester oil, a hydrocarbon oil, a higher alcohol, or a higher fatty acid, which are used in sunscreen cosmetics. Among these, the sunscreen cosmetic of the present invention preferably further contains silicone oil as (E): oil agent, from the viewpoint of improving emulsion stability. Examples of silicone oils include liquid, semi-solid, and solid silicone oils such as linear organopolysiloxanes, cyclic organopolysiloxanes, and modified silicones other than component (A) and component (B). An example of the linear organopolysiloxane is dimethylpolysiloxane. Specific examples of the linear organopolysiloxane include octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, and 1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyl)oxy]-trisiloxane. Examples of cyclic organopolysiloxanes include 4- to 6-membered cyclic siloxanes having, as a substituent, an alkyl group having from 1 to 5 carbon atoms. Specific examples of cyclic organopolysiloxanes include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Examples of modified silicones include amino-modified silicones (dimethylpolysiloxanes having amino groups), amino derivative silicones, carboxy-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, aliphatic alcohol-modified silicones, epoxy-modified silicones, fluorine-modified silicones, and polyether-modified silicones. The silicone oil is preferably a linear organopolysiloxane, more preferably a dimethylpolysiloxane, from the viewpoint of improving emulsion stability and improving the feel upon application.

[0061] The sunscreen cosmetic of the present invention may contain polyether-modified silicone to the extent that the effects of the present invention are not impaired. Examples of polyether-modified silicones include PEG-3 dimethicone, PEG-9 dimethicone, PEG-9PEG-9 dimethicone, PEG-9 methyl ether dimethicone, PEG-10 dimethicone, PEG-11 methyl ether dimethicone, PEG / PPG-20 / 22 butyl ether dimethicone, PEG-32 methyl ether dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, and lauryl PEG-9 polydimethylsiloxyethyl dimethicone. From the viewpoint of emulsion stability and improving the heat resistance and abrasion resistance of the cosmetic coating film, the content of polyether-modified silicone in the sunscreen cosmetic of the present invention is preferably less than 2% by mass, more preferably 1% by mass or less, even more preferably 0.7% by mass or less, still more preferably 0.5% by mass or less, still more preferably 0.3% by mass or less, and even more preferably 0.1% by mass or less.

[0062] The kinematic viscosity of the silicone oil at 25°C is preferably 0.5 mm from the viewpoint of improving emulsion stability and improving the feeling of use when applied. 2 / s or more, preferably 1 mm 2 / s or more, more preferably 1.5 mm 2 / s or more, and from the same viewpoint as above, preferably 6,000 mm 2 / s or less, and even more preferably 1,000 mm2 / s or less, and even more preferably 700 mm 2 / s or less, and even more preferably 300 mm 2 / s or less, and even more preferably 100 mm 2 / s or less, and even more preferably 50 mm 2 / s or less, and even more preferably 30 mm 2 / s or less, and even more preferably 10 mm 2 More specifically, the kinematic viscosity of the silicone oil at 25°C is preferably 0.5 mm / s or less. 2 / s or more 6,000mm 2 / s or less, preferably 0.5 mm 2 / s or more 1,000mm 2 / s or less, more preferably 0.5 mm 2 / s or more 700mm 2 / s or less, and even more preferably 0.5 mm 2 / s or more 300mm 2 / s or less, and even more preferably 0.5 mm 2 / s or more 100mm 2 / s or less, and even more preferably 0.5 mm 2 / s or more 50mm 2 / s or less, and even more preferably 0.5 mm 2 / s or more 30mm 2 / s or less, and even more preferably 0.5 mm 2 / s or more 10mm 2 / s or less, and even more preferably 1 mm 2 / s or more 10mm 2 / s or less, and even more preferably 1.5 mm 2 / s or more 10mm 2 / s or less. The kinematic viscosity of the silicone oil at 25°C can be measured using an Ubbelohde viscometer in accordance with ASTM D 445-46T or JIS Z 8803.

[0063] Commercially available silicone oils include "KF-96L-2cs" (dimethylpolysiloxane), "KF-96A-6cs" (dimethylpolysiloxane), "KF-96A-10cs" (dimethylpolysiloxane), "KF-96A-20cs" (dimethylpolysiloxane), and "KF-96A-100cs" (dimethylpolysiloxane), all manufactured by Shin-Etsu Chemical Co., Ltd.

[0064] The content of component (E) in the sunscreen cosmetic of the present invention is preferably 40% by mass or more, more preferably 45% by mass or more, and even more preferably 50% by mass or more, from the viewpoints of emulsion stability, improving spreadability upon application, and suppressing white cast after application, and from the same viewpoints as above, is preferably 80% by mass or less, more preferably 70% by mass or less, even more preferably 65% ​​by mass or less, and even more preferably 60% by mass or less. More specifically, the content of component (E) in the sunscreen cosmetic of the present invention is preferably 40% by mass or more and 80% by mass or less, more preferably 40% by mass or more and 70% by mass or less, even more preferably 45% by mass or more and 65% by mass or less, and even more preferably 50% by mass or more and 60% by mass or less. When the sunscreen cosmetic of the present invention further contains silicone oil as an oil agent (E), the content of silicone oil in the sunscreen cosmetic of the present invention is preferably at least 40% by mass, more preferably at least 45% by mass, and even more preferably at least 50% by mass, from the viewpoints of emulsion stability, improving spreadability upon application, and suppressing white cast after application, and from the same viewpoints as above, is preferably at most 80% by mass, more preferably at most 70% by mass, even more preferably at most 65% by mass, and still more preferably at most 60% by mass. More specifically, the content of component (E) in the sunscreen cosmetic of the present invention is preferably at least 40% by mass but not more than 80% by mass, more preferably at least 40% by mass but not more than 70% by mass, even more preferably at least 45% by mass but not more than 65% by mass, and even more preferably at least 50% by mass but not more than 60% by mass.

[0065] <Component (F): Water-soluble organic solvent> From the viewpoint of improving emulsion stability, the sunscreen cosmetic of the present invention preferably further contains (F): a water-soluble organic solvent. In the present invention, the "water-soluble organic solvent" is an organic solvent that is arbitrarily miscible with water. Examples of component (F) include saturated monohydric alcohols having 1 to 3 carbon atoms, such as ethanol and isopropyl alcohol, and polyhydric alcohols, such as ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol (average molecular weight less than 650), propylene glycol, dipropylene glycol, polypropylene glycol (average molecular weight less than 650), isoprene glycol, 1,3-butylene glycol, glycerin, diglycerin, and polyglycerin. Component (F) can be used singly or in combination of two or more. Among these, component (F) is preferably a polyhydric alcohol, more preferably at least one selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, and glycerin, and even more preferably at least one selected from the group consisting of dipropylene glycol, 1,3-butylene glycol, and glycerin.

[0066] From the viewpoint of improving emulsion stability, the content of component (F) in the sunscreen cosmetic of the present invention is preferably 3% by mass or more, more preferably 5% by mass or more, even more preferably 7% by mass or more, and preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less. More specifically, the content of component (F) in the sunscreen cosmetic of the present invention is preferably 3% by mass or more and 20% by mass or less, more preferably 5% by mass or more and 15% by mass or less, even more preferably 7% by mass or more and 10% by mass or less.

[0067] In addition to components (A) to (F), the sunscreen cosmetic of the present invention may contain optional components used in sunscreen cosmetic applications, as appropriate, to the extent that the effects of the present invention are not impaired. Such optional components include surfactants, water-soluble polymers, neutralizing agents, pH adjusters, disinfectants, anti-inflammatory agents, preservatives, colorants, chelating agents, whitening agents, antiperspirants, antioxidants, fragrances, etc., other than components (A) to (F).

[0068] The formulation of the sunscreen cosmetic of the present invention may be a liquid, emulsion, cream, or non-solid type including at least two layers, an aqueous layer and an oily layer, etc. Among these, from the viewpoints of emulsion stability, improving spreadability upon application, suppressing white cast after application, and improving the heat resistance and abrasion resistance of the cosmetic coating film, it is preferable that the sunscreen cosmetic be in a water-in-oil emulsion state upon use, and more preferably be a two-layer separated type that is shaken before use. In the present invention, a "two-layer separated sunscreen cosmetic" is a cosmetic that is separated into two layers, an oil layer and an aqueous layer, when left to stand before use, and is used in a water-in-oil emulsion state upon shaking during use.

[0069] The sunscreen cosmetic 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, hands, feet, etc.) to form a cosmetic coating film on the skin. The method of application to the skin is not particularly limited, but application by hand or with an applicator is preferred. When the sunscreen cosmetic of the present invention is a two-layer separated sunscreen cosmetic, it is preferable to emulsify it into a water-in-oil type emulsion by shaking it at the time of use (i.e., before application to the skin).

[0070] The sunscreen cosmetic of the present invention can be produced by a conventional method. Examples of such production methods include a method comprising the step of blending components (A) to (D) and, if necessary, the optional components described above, and uniformly mixing them using a homogenizer or the like. Among these, from the viewpoints of emulsion stability, improving spreadability during application, suppressing white cast after application, and improving the heat resistance and abrasion resistance of the cosmetic coating film, a method comprising the step of mixing a preparation obtained by mixing components (A) to (C) and, if necessary, an oil-based component containing the oil-soluble optional component described above with a preparation obtained by mixing component (D) and, if necessary, a water-soluble component containing the water-soluble optional component described above is preferred.

[0071] [How to improve UV protection] By heating the cosmetic coating film formed by the sunscreen cosmetic of the present invention, the in vitro SPF value after heating can be made higher than the in vitro SPF value before heating. From this perspective, the sunscreen cosmetic of the present invention is preferably used in a method for improving UV protection effect. The method for improving UV protection effect preferably includes a step of heating the cosmetic coating film formed by applying the sunscreen cosmetic to the skin.

[0072] In the method of the present invention, the amount of the sunscreen cosmetic applied to the skin is preferably 0.3 mg / cm from the viewpoint of improving the ultraviolet protection effect. 2 More preferably, 0.7 mg / cm 2 More preferably, 1 mg / cm 2 From the viewpoint of improving the spreadability during application, suppressing whitening after application, and economical efficiency, the amount is preferably 3 mg / cm 2 or less, more preferably 2.5 mg / cm 2 More preferably, 2 mg / cm or less 2 More specifically, the amount of the sunscreen cosmetic applied to the skin is preferably 0.3 mg / cm. 2 More than 3mg / cm 2 or less, more preferably 0.7 mg / cm 2 More than 2.5mg / cm 2More preferably, 1 mg / cm or less 2 More than 2mg / cm 2 The following is the result. The method of application to the skin is not particularly limited, but application by hand or with an applicator is preferred.

[0073] From the viewpoint of UV protection effect, the heat treatment temperature of the cosmetic coating film in the method of the present invention is preferably equal to or higher than the skin surface temperature but equal to or lower than 47°C. Skin surface temperature may vary depending on the ambient temperature and the user's condition (presence or absence of fever, resting state, exercise state, etc.), but is usually equal to or higher than 30°C. Therefore, the heat treatment temperature of the cosmetic coating film is preferably equal to or higher than 30°C, more preferably equal to or higher than 33°C, even more preferably equal to or higher than 35°C, and even more preferably equal to or higher than 37°C. Furthermore, the upper limit of the heat treatment temperature of the cosmetic coating film in the present invention is preferably the actual use temperature of the cosmetic coating film after application of the sunscreen cosmetic to the skin. For example, since the skin surface temperature under sunlight exposure in summer is approximately 40°C, and in some cases may be between 41°C and 45°C, the heat treatment temperature of the cosmetic coating film is preferably equal to or lower than 45°C. The method of heat treating the cosmetic coating film in the method of the present invention is preferably one that involves increasing the skin surface temperature by irradiating the cosmetic coating film with sunlight. In the method of the present invention, the heat treatment time for the cosmetic coating film is preferably 3 minutes or more, more preferably 5 minutes or more, and even more preferably 10 minutes or more, from the viewpoint of improving the UV protection effect. The upper limit of the heat treatment time is not particularly limited, but is preferably 60 minutes or less, more preferably 40 minutes or less.

[0074] According to the method of the present invention, the SPF value of the cosmetic coating film after heating is higher than the SPF value of the cosmetic coating film before heating, thereby improving the UV protection effect. From this perspective, the rate of change in SPF value before and after heat treatment, calculated using the following formula (I), is preferably 0.3% or more, more preferably 1% or more, even more preferably 2% or more, and even more preferably 3% or more, and although there is no particular upper limit, it is preferably 100% or less. Rate of change in SPF value before and after heat treatment (%) = {[(SPF value of decorative coating film after heating) / (SPF value of decorative coating film before heating)] - 1} × 100 (I) Here, the SPF value can be an in vitro SPF value calculated from the results of measuring the absorption spectrum (measurement wavelength: 290 to 450 nm) using an SPF analyzer. The rate of change (%) of the SPF value can be calculated specifically by the method in the Examples.

[0075] In addition to the above-described embodiments, the present invention also discloses the following embodiments.

[0076] <1> A sunscreen cosmetic comprising the following components (A) to (D): (A): Polyglycerin-modified silicone (B): At least one selected from the group consisting of the following components (B1) and (B2) (excluding component (A)): (B1): Silicone dendrimer (B2): Silicone wax (C): UV protection agent (D):Water A sunscreen cosmetic in which the mass ratio [(A) / (B)] of the content of component (A) to the content of component (B) is 0.1 or more and 5 or less. <2> The component (A) is a silicone having a monovalent polyglyceryl group on a side chain or at the end of the silicone chain. <1> The sunscreen cosmetic composition according to claim 1. <3> The component (B1) is an acrylic polymer having a siloxane dendrimer structure in the side chain. <1> or <2> The sunscreen cosmetic composition according to claim 1. <4> The component (B2) is an alkyl-modified silicone wax. <1> ~ <3> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <5> The component (C) is at least one selected from the group consisting of an ultraviolet scattering agent and an ultraviolet absorber. <1> ~ <4> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <6> The average primary particle diameter of the ultraviolet scattering agent is 1 nm or more and 90 nm or less. <5> The sunscreen cosmetic composition according to claim 1. <7> The content of component (A) is 0.3% by mass or more and 10% by mass or less. <1> ~ <6> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <8> The content of component (A) is 0.3 mass% or more and 2.5 mass% or less. <1> ~ <6> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <9> The mass ratio of the content of component (A) to the content of component (B) [(A) / (B)] is 0.1 or more and 3 or less. <1> ~ <8> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <10> The mass ratio of the content of the component (A) to the content of the component (B) [(A) / (B)] is 0.3 or more and 1.3 or less. <1> ~ <8> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is

[0077] <11> A sunscreen cosmetic comprising the following components (A) to (D): (A): Silicone having a monovalent polyglyceryl group on the side chain or end of the silicone chain (B): At least one selected from the group consisting of the following components (B1) and (B2) (excluding component (A)): (B1): Acrylic polymer with a siloxane dendrimer structure in the side chain (B2): Alkyl-modified silicone wax (C): At least one selected from the group consisting of ultraviolet scattering agents and ultraviolet absorbing agents (D):Water The content of component (A) is 0.3% by mass or more and 10% by mass or less, A sunscreen cosmetic in which the mass ratio [(A) / (B)] of the content of component (A) to the content of component (B) is 0.1 or more and 5 or less. <12> The mass ratio of the content of component (A) to the content of component (B) [(A) / (B)] is 0.1 or more and 3 or less. <11> The sunscreen cosmetic composition according to claim 1. <13> The mass ratio of the content of the component (A) to the content of the component (B) [(A) / (B)] is 0.3 or more and 1.3 or less. <11> The sunscreen cosmetic composition according to claim 1. <14> The average primary particle diameter of the ultraviolet scattering agent is 1 nm or more and 90 nm or less. <11> ~ <13> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is

[0078] <15> A sunscreen cosmetic comprising the following components (A) to (D): (A): Silicone having a monovalent polyglyceryl group on the side chain or end of the silicone chain (B): At least one selected from the group consisting of the following components (B1) and (B2) (excluding component (A)): (B1): Acrylic polymer with a siloxane dendrimer structure in the side chain (B2): Alkyl-modified silicone wax (C): At least one selected from the group consisting of ultraviolet scattering agents and ultraviolet absorbing agents (D):Water The content of component (A) is 0.3% by mass or more and 2.5% by mass or less, A sunscreen cosmetic in which the mass ratio [(A) / (B)] of the content of component (A) to the content of component (B) is 0.3 or more and 1.3 or less. <16> The average primary particle diameter of the ultraviolet scattering agent is 1 nm or more and 90 nm or less. <15> The sunscreen cosmetic composition according to claim 1.

[0079] <17> The component (A) is a polyglycerin-modified silicone represented by the following formula (3): <1> ~ <16> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is [ka] [In formula (3), R 31 is a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, and R 32 is a group represented by the formula (2-1) or (2-2), and R 33 is a polyglyceryl group containing a glycerin unit (C3H6O2) represented by the formula (1). a, b, and c are the number of repeating units of each organosiloxane unit. <18> The component (A) is at least one selected from the group consisting of polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone. <1> ~ <17> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <19> The melting point of the component (B2) is 50°C or higher. <1> ~ <18> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <20> The component (C) is a fine particle metal oxide that has been hydrophobized. <1> ~ <119> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <21> The fine particle metal oxide is at least one selected from the group consisting of fine particle zinc oxide and fine particle titanium oxide. <20> The sunscreen cosmetic composition according to claim 1. <22> The hydrophobic treatment is at least one selected from the group consisting of a silicone treatment, an alkylalkoxysilane treatment, and a fatty acid treatment. <20> or <21> The sunscreen cosmetic composition according to claim 1. <23> The above-mentioned composition is a two-layer separated type that is shaken when used. <1> ~ <22> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is

[0080] <24> A sunscreen cosmetic comprising the following components (A) to (D): (A): Polyglycerin-modified silicone (B): At least one selected from the group consisting of the following components (B1) and (B2) (excluding component (A)): (B1): Silicone dendrimer (B2): Alkyl-modified silicone wax (C): UV protection agent (D):Water The sunscreen cosmetic is a two-layer separated type that is shaken when used. <25> The component (A) is a silicone having a monovalent polyglyceryl group on a side chain or at the end of the silicone chain. <24> The sunscreen cosmetic composition according to claim 1. <26> The component (A) is a polyglycerin-modified silicone represented by the following formula (3): <24> or <25> The sunscreen cosmetic composition according to claim 1. [ka] [In formula (3), R 31 is a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, and R 32 is a group represented by the formula (2-1) or (2-2), and R 33 is a polyglyceryl group containing a glycerin unit (C3H6O2) represented by the formula (1). a, b, and c are the number of repeating units of each organosiloxane unit. <27> The component (A) is at least one selected from the group consisting of polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone. <24> ~ <26> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <28> The component (B1) is an acrylic polymer having a siloxane dendrimer structure in the side chain. <24> ~ <27> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <29> The component (B2) is an alkyl-modified silicone wax. <24> ~ <28> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <30> The melting point of the component (B2) is 50°C or higher. <24> ~ <29> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <31> The component (C) is at least one selected from the group consisting of an ultraviolet scattering agent and an ultraviolet absorber. <24> ~ <30> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <32> The average primary particle diameter of the ultraviolet scattering agent is 1 nm or more and 90 nm or less. <31> The sunscreen cosmetic composition according to claim 1. <33> The component (C) is a fine particle metal oxide that has been hydrophobized. <24> ~ <32> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <34> The fine particle metal oxide is at least one selected from the group consisting of fine particle zinc oxide and fine particle titanium oxide. <33> The sunscreen cosmetic composition according to claim 1. <35> The hydrophobic treatment is at least one selected from the group consisting of a silicone treatment, an alkylalkoxysilane treatment, and a fatty acid treatment. <33> or <34> The sunscreen cosmetic composition according to claim 1. <36> The content of component (A) is 0.3% by mass or more and 10% by mass or less. <24> ~ <35> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <37> The content of component (A) is 0.3 mass% or more and 2.5 mass% or less. <24> ~ <35> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <38> The mass ratio of the content of the component (A) to the content of the component (B) [(A) / (B)] is 0.1 or more and 5 or less, <24> ~ <37> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <39> The mass ratio of the content of component (A) to the content of component (B) [(A) / (B)] is 0.1 or more and 3 or less. <24> ~ <37> The sunscreen cosmetic composition according to any one of the above. <40> The mass ratio of the content of the component (A) to the content of the component (B) [(A) / (B)] is 0.3 or more and 1.3 or less. <24> ~ <37> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is

[0081] <41> The total content of the component (A) and the component (B) is 2% by mass or less and 4% by mass or less. <1> ~ <40> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <42> The content of the component (C) is 5% by mass or more and 45% by mass or less. <1> ~ <41> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <43> The content of the component (D) is 0.5% by mass or more and 10% by mass or less. <1> ~ <42> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <44> (E): The above-mentioned composition further contains silicone oil as an oil agent. <1> ~ <43> The sunscreen cosmetic composition according to claim 1. <45> The content of the component (E) is 40% by mass or more and 80% by mass or less. <44> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <46> (F): The above-mentioned composition further containing a water-soluble organic solvent. <1> ~ <45> 10. The sunscreen cosmetic according to claim 9, wherein the sunscreen cosmetic is <47> The content of the component (F) is 3% by mass or more and 20% by mass or less. <46> The sunscreen cosmetic composition according to claim 1.

[0082] <48> The aforementioned <1> ~ <47> 1. A method for improving UV protection effect, comprising a step of applying the sunscreen cosmetic composition according to any one of the preceding items to the skin and heating the cosmetic coating film formed thereon, wherein the SPF value of the cosmetic coating film after heating is higher than the SPF value of the cosmetic coating film before heating. <49> The amount applied to the skin is 0.3 mg / cm 2 More than 3mg / cm 2 The above-mentioned <48> The method for improving the ultraviolet protection effect described in 1. <50> The heat treatment temperature of the decorative coating film is 30°C or higher and 45°C or lower. <48> or <49> The method for improving the ultraviolet protection effect described in 1. <51> The rate of change in SPF value before and after heat treatment calculated by the following formula (I) is 0.3% or more. <48> ~ <50> 2. The method for improving ultraviolet protection effect according to claim 1, wherein Rate of change in SPF value before and after heat treatment (%) = {[(SPF value of decorative coating film after heating) / (SPF value of decorative coating film before heating)] - 1} × 100 (I) Here, the SPF value used is an in vitro SPF value calculated from the results of measuring the absorption spectrum (measurement wavelength: 290 to 450 nm) using an SPF analyzer. [Example]

[0083] EXAMPLES The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited to these.

[0084] (Average primary particle size of component (C1) and component (C1')) The average primary particle diameters of the components (C1) and (C1') were measured by the following method. When the measurement sample has a shape other than a plate, a dispersion of the measurement sample prepared in advance is placed on the sample stage of a transmission electron microscope (TEM) (trade name "JEM1400Plus", manufactured by JEOL Ltd.) and air-dried. After that, the maximum minor axis diameters of 300 primary particles in an image observed with the TEM at a magnification of 50,000 times are measured, and the number average value thereof is taken as the average primary particle diameter. Here, the maximum minor axis diameter refers to the minor axis having the longest length among the minor axes perpendicular to the major axis diameter. When the measurement sample had a plate-like shape, the thicknesses of 300 primary particles in the image observed under the same method and magnification conditions as above were measured, and the number average value was taken as the average primary particle diameter for each. The dispersion of the measurement sample was prepared by adding 95 g of ethanol as a solvent to 5 g of the measurement sample and subjecting the mixture to ultrasonic dispersion.

[0085] Preparation Example 1 (Preparation of triethoxycaprylylsilane-treated zinc oxide particles) A slurry consisting of 97 parts by mass of zinc oxide fine particles (approximately spherical, average primary particle diameter 35 nm), 3 parts by mass of octyltriethoxysilane (triethoxycaprylylsilane), and toluene was prepared, and pulverized and crushed using a bead mill (Dynomill, manufactured by Shinmaru Enterprises Co., Ltd.). Next, the toluene was distilled off under reduced pressure, and the mixture was heated at 150°C for 4 hours using an airflow dryer to obtain triethoxycaprylylsilane-treated zinc oxide fine particles.

[0086] Examples 1 to 13, Comparative Examples 1 to 3 The ingredients were blended to give the contents (active ingredients) shown in Table 1, and each sunscreen cosmetic was obtained by the following method. Components 1 to 13 shown in Table 1 were mixed with stirring to obtain an oily component preparation. Separately, ingredients 14 and 15 shown in Table 1 were mixed with stirring to obtain a water-soluble ingredient preparation. The oily component preparation and the water-soluble component preparation were thoroughly mixed and stirred using a homogenizer to obtain a sunscreen cosmetic.

[0087] Using the obtained sunscreen cosmetics, the heat resistance and friction resistance of the cosmetic coating film were evaluated by checking (1) the change in UV protection effect due to heating of the cosmetic coating film and (2) the change in UV protection effect due to friction of the cosmetic coating film, as shown below, and (3) the feel when used (ease of spread when applied, absence of white cast after application) was evaluated. The cosmetics of Examples 1 to 13 and Comparative Examples 1 to 3 were two-layer separated sunscreen cosmetics, and therefore were shaken immediately before use before various measurements and evaluations. The results are shown in Table 1.

[0088] (1) Changes in UV protection effect of decorative coating film due to heating The sunscreen cosmetics shown in Table 1 were applied to a PMMA plate ("HD6" manufactured by HelioScreen) at a concentration of 1.3 mg / cm. 2 The cosmetic coating film was then formed into a measurement sample, and the in vitro SPF value was calculated from the absorption spectrum (measurement wavelength: 290-450 nm) measured using an SPF analyzer "UV-2000S" (manufactured by Labsphere). The average of the in vitro SPF values ​​measured at nine points on each sample was used as the SPF value of the cosmetic coating film before heat treatment. The measurement samples were then heat-treated by leaving them to stand for 30 minutes in an environment at 45°C, and the in vitro SPF value was calculated from the absorption spectrum (measurement wavelength: 290-450 nm) measured using the SPF analyzer. The average of the in vitro SPF values ​​measured at nine points on each sample was used as the SPF value of the cosmetic coating film after heat treatment. The rate of change in SPF value before and after heat treatment was then calculated using the following formula (I) to evaluate heat resistance. The higher the rate of change in SPF value, the higher the heat resistance, and the greater the improvement in UV protection effect of the cosmetic coating film due to heating. Rate of change in SPF value before and after heat treatment (%) = {[(SPF value of decorative coating film after heat treatment) / (SPF value of decorative coating film before heat treatment)] - 1} × 100 (I)

[0089] (2) Changes in UV protection effect of cosmetic coating due to friction The sunscreen cosmetics shown in Table 1 were applied to a PMMA plate ("HD6" manufactured by HelioScreen) at a concentration of 1.3 mg / cm.2 The cosmetic coating film was then formed into a measurement sample, and the in vitro SPF value was calculated from the absorption spectrum (measurement wavelength: 290-450 nm) measured using an SPF analyzer "UV-2000S" (Labsphere). The average of the in vitro SPF values ​​measured at nine points on each sample was used as the SPF value of the cosmetic coating film before the friction test. Next, a friction tester "Tribomaster TL201Ts" (Trinity Lab Co., Ltd.) was used to measure the friction 2 A friction test was performed by applying a 20 g load to a terminal with a cotton cloth attached, and rubbing the decorative coating on the PMMA plate. The in vitro SPF value was then calculated from the absorption spectrum (measurement wavelength: 290-450 nm) measured using the SPF analyzer. The average of the in vitro SPF values ​​measured at nine points on each sample was used as the SPF value of the decorative coating after the friction test. Next, the SPF value retention rate before and after the friction test was calculated using the following formula (II) to evaluate the friction resistance. The higher the SPF value retention rate before and after the friction test, the higher the friction resistance. SPF value retention rate (%) before and after the friction test = [(SPF value of the decorative coating film after the friction test) / (SPF value of the decorative coating film before the friction test)] × 100 (II)

[0090] (3) Feeling of use Ten expert panelists conducted a sensory evaluation of the ease of spread upon application. At 25°C and 57% RH, 0.02 mL of each sunscreen cosmetic was applied to the inside of the forearm after shaking in a circle 3 cm in diameter, and the texture after spreading over 1 minute was evaluated based on the following criteria: "ease of spread upon application" and "absence of white cast after application." [Evaluation criteria for spreadability when applied] A: Eight or more panelists answered that it had good growth. B: Six or seven panelists answered that it had good spreadability. C: The number of panelists who answered that the stretch was good was 3 to 5. D: Two or fewer panelists answered that the stretch was good. [Evaluation criteria for absence of white cast after application] A: Eight or more panelists answered that there was almost no white cast. B: Six or seven panelists answered that there was almost no white cast. C: The number of panelists who answered that there was almost no white cast was 3 to 5. D: Two or fewer panelists answered that there was almost no white cast.

[0091] [Table 1]

[0092] Details of the ingredients used in Table 1 are shown below. *1: Shin-Etsu Chemical Co., Ltd. "KF-6106" (Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone) *2: Shin-Etsu Chemical Co., Ltd. "KF-6105" (Lauryl Polyglyceryl-3 Polydimethylsiloxyethyl Dimethicone) *3: Shin-Etsu Chemical Co., Ltd. "KF-6017" (PEG-10 Dimethicone) *4: Dow Chemical Japan Co., Ltd. "DOWSIL FA 4003 DM Silicone Acrylate" ((Acrylates / Polytrimethylsiloxymethacrylate) Copolymer, Dimethicone (2cs), Active Ingredients: 40% by mass) *5: Shin-Etsu Chemical Co., Ltd. "KF-7312K" (trimethylsiloxysilicate, dimethicone (6cs), active ingredient: 50% by mass) *6: Dow Chemical Japan Co., Ltd. "DOWSIL SW-8005 C30 Resin Wax" (Alkyl (C30-45) dimethylsilyl polypropylsilsesquioxane, melting point 63-71°C) *7: Dow Chemical Japan Co., Ltd. "AMS-C30 Cosmetic Wax" (Alkylmethylsiloxane wax (Alkyl (C30-45) Methicone), Olefin (C30-40), Melting point 73-77°C) *8: "MT-N1" manufactured by Teika Corporation (fatty acid-treated titanium dioxide fine particles, average primary particle diameter 8 nm) *9: Triethoxycaprylylsilane-treated zinc oxide microparticles obtained in Preparation Example 1 *10: BASF "UVINUL MC80" (2-ethylhexyl paramethoxycinnamate) *11: "KF-96A-6cs" (Dimethicone (6cs)) manufactured by Shin-Etsu Chemical Co., Ltd. *12: "KF-96L-2cs" (Dimethicone (2cs)) manufactured by Shin-Etsu Chemical Co., Ltd. *13: Croda Japan Co., Ltd. "Span 120-LQ-(RB)" (sorbitan isostearate) The content of component (E) in the table includes the amount carried over from component (B1) or component (B1').

[0093] It can be seen from Table 1 that the sunscreen cosmetics according to the examples of the present invention are capable of forming a cosmetic coating film that is superior in heat resistance and abrasion resistance compared to the sunscreen cosmetics of the comparative examples, and also have good spreadability when applied to the skin, and suppress the appearance of a white cast after application to the skin. Comparative Example 1 uses polyether-modified silicone instead of polyglycerin-modified silicone of component (A), and therefore has poor heat resistance and abrasion resistance. Comparative Example 2 does not contain component (B), and therefore has poor abrasion resistance. In Comparative Example 3, trimethylsiloxysilicate, which does not have a dendrimer structure, is used instead of the silicone dendrimer of component (B1), and therefore spreadability when applied to the skin is poor.

Claims

1. A sunscreen cosmetic containing the following components (A) to (D): The content of component (A) is 0.3% by mass or more and 2.5% by mass or less, the component (C) contains a hydrophobized fine particle metal oxide as the component (C1), and the content of the component (C1) is 10% by mass or more and 45% by mass or less; the mass ratio of component (B) to component (C1) [(C1) / (B)] is 15 to 125; Sunscreen cosmetics. (A): Polyglycerin-modified silicone (B): At least one selected from the group consisting of the following components (B1) and (B2) (excluding component (A)): (B1): Silicone dendrimer (B2): Silicone wax (C): UV protection agent (D): Water

2. 2. The sunscreen cosmetic according to claim 1, further comprising (E): a silicone oil as an oil agent.

3. 3. The sunscreen cosmetic according to claim 1, wherein component (A) is at least one member selected from the group consisting of polyglyceryl-3 polydimethylsiloxyethyl dimethicone, polyglyceryl-3 disiloxane dimethicone, and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone.

4. 4. The sunscreen cosmetic according to claim 1, wherein component (B1) is an acrylic polymer having a siloxane dendrimer structure in its side chain.

5. 5. The sunscreen cosmetic according to claim 1, wherein the melting point of component (B2) is 50°C or higher.

6. The sunscreen cosmetic according to any one of claims 1 to 5, further comprising (F): a water-soluble organic solvent.

7. 7. The sunscreen cosmetic according to claim 1, wherein the mass ratio of the content of component (A) to the content of component (B) [(A) / (B)] is 0.1 or more and 3 or less.

8. 8. The sunscreen cosmetic composition according to claim 1, which is a two-layer separated type and is shaken when used.

9. A method for improving ultraviolet protection effect, comprising a step of applying the sunscreen cosmetic composition according to any one of claims 1 to 8 to the skin and heating the cosmetic coating film formed.

Images