Oil-in-water type sunscreen cosmetic

Abstract

To provide an oil-in-water type sunscreen cosmetic having excellent moisture-retaining feeling, no stickiness when applied to the sticky skin after sweating, excellent sustainability of the non-stickiness and excellent ease of being washed off.SOLUTION: There is provided an oil-in-water type sunscreen cosmetic which comprises (A) 1 to 25 mass% of one or two or more ultraviolet absorbers, (B) 0.01 to 3 mass% of a copolymer having a structural unit based on 2-(meth)acryloyloxyethyl phosphorylcholine and a structural unit based on a (meth)acrylic acid alkyl having an alkyl group having 1 to 22 carbon atoms and (C) 0.1 to 15 mass% of at least one selected from the group consisting of talc and silica, wherein the mass ratio [(A) / (B)] of the component (A) to the component (B) is 10 to 80.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an oil-in-water sunscreen cosmetic. [Background technology]

[0002] When ultraviolet rays hit the skin, they immediately cause sunburn such as erythema and darkening, and in the long term, they cause photoaging phenomena such as spots and wrinkles. This knowledge is gradually spreading among the general consumer, and sunscreen cosmetics are no longer just for summer leisure activities, but are becoming something that is used on a daily basis. As sunscreen cosmetics become more widely used by the general consumer, they are now required to not only provide UV protection but also a good feel when used, and oil-in-water sunscreen cosmetics, which tend to have a refreshing feel, are widely used.

[0003] Sunscreen cosmetics are required to have not only ease of use but also various added values ​​such as skin care effects, etc. For example, Patent Document 1 proposes a sunscreen cosmetic that contains an ultraviolet absorber, phytosterol, glyceryl glucoside, and one or more selected from pentylene glycol, isostearyl neopentanoate, and quince seed extract, and describes that it provides a high moisturizing feeling. Furthermore, as the frequency of use of sunscreen cosmetics increases, there is a demand for cosmetics that are easy to wash off after use, and Patent Document 2 proposes an oil-in-water sunscreen cosmetic that contains a polyester-modified silicone, a UV protection agent, a higher alcohol and / or monoacylglycerol, a liquid oil, a polyoxyethylene sterol, and hydrogenated lecithin.

[0004] On the other hand, when using sunscreen cosmetics in the summer, it is expected that they will be applied to sweaty, sticky skin. In cosmetics other than sunscreen cosmetics, as in Patent Document 3, a weak acid powder-containing cosmetic composition containing silicic anhydride, a cationic polymer, a nonionic polymer, and water has been proposed to suppress stickiness on the skin and improve and maintain a smooth feeling. However, UV absorbers generally tend to cause stickiness, and no sunscreen cosmetics have been developed that do not become sticky when applied to sweaty skin and that maintain that non-stickiness for a long time. Therefore, there is a need for the development of an oil-in-water sunscreen cosmetic that provides an excellent moisturizing feeling, is non-sticky when applied to sweaty and sticky skin, has excellent durability of the non-stickiness, and is easy to wash off. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-177689 [Patent Document 2] Patent Publication No. 2021-155365 [Patent Document 3] Japanese Patent Application Laid-Open No. 2012-219028 Summary of the Invention [Problem to be solved by the invention]

[0006] To provide an oil-in-water sunscreen cosmetic which has an excellent moisturizing feeling, is non-sticky when applied to sweaty and sticky skin, has excellent durability of the non-stickiness, and is easy to wash off. [Means for solving the problem]

[0007] As a result of extensive research into solving the above problems, the present inventors have found that an oil-in-water sunscreen cosmetic that can solve the above problems can be obtained by incorporating one or more ultraviolet absorbers, a specific copolymer, and an inorganic powder in combination, each in a specific range of content, and have thus completed the present invention. That is, the present invention relates to the following [1].

[0008] [1] (A) 1 to 25 mass% of one or more ultraviolet absorbers, (B) 0.01 to 3 mass% of a copolymer having structural units represented by formula (1) and formula (2), [ka] (In formula (1), R 1 represents a hydrogen atom or a methyl group. [ka] (In formula (2), R 2 represents a hydrogen atom or a methyl group, and R 3 represents an alkyl group having 1 to 22 carbon atoms. (C) An oil-in-water sunscreen cosmetic comprising 0.1 to 15 mass % of at least one selected from the group consisting of talc and silica, and wherein the mass ratio of the component (A) to the component (B) [(A) / (B)] is 10 to 80. [Effects of the Invention]

[0009] The sunscreen cosmetic of the present invention has an excellent moisturizing feeling, but is not sticky when applied to sweaty and sticky skin, and further has excellent durability of the non-stickiness and excellent ease of rinsing. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described. Various modifications are possible without departing from the spirit of the present invention. Furthermore, in this specification, a numerical range defined using the symbol "to" includes both the upper and lower limits of the symbol "to." For example, "2 to 4" means 2 or more and 4 or less. Furthermore, in this specification, the content of each component is the content when the total amount of the oil-in-water sunscreen cosmetic of the present invention is taken as 100% by mass. Furthermore, when a composition contains multiple substances corresponding to each component, the content of each component in the composition refers to the total content of the multiple corresponding substances present in the composition. The oil-in-water sunscreen cosmetic of the present invention contains the following (A) one or more ultraviolet absorbers (hereinafter also referred to as component (A)), (B) a copolymer having structural units represented by formula (1) and formula (2) (hereinafter also referred to as component (B)), and (C) at least one member selected from the group consisting of talc and silica (hereinafter also referred to as component (C)) in specific amounts. Each component is explained below.

[0011] [Component (A)] Component (A) used in the oil-in-water sunscreen cosmetic of the present invention is one or more ultraviolet absorbers. Component (A) is not particularly limited, and any agent commonly used in the cosmetics field can be used.

[0012] Examples of component (A) include amyl paradimethylbenzoate, 2-ethylhexyl paradimethylaminobenzoate, ethyl 4-[N,N-di(2-hydroxypropyl)amino]benzoate, hexyl diethylaminohydroxybenzoylbenzoate, 2-ethylhexyl salicylate, 2-ethoxyethyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, glyceryl di-paramethoxycinnamate mono-2-ethylhexanoate, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, octocrylene, 4-t-butyl-4'-methoxydibenzoylmethane, dimethicodiethyl benzalmalonate, and bisethylhexyloxyphenol methoxyphenyl triazine. Among these, preferred are diethylaminohydroxybenzoylhexyl benzoate, 2-ethylhexyl salicylate, 2-ethylhexyl paramethoxycinnamate, octocrylene, 4-t-butyl-4'-methoxydibenzoylmethane, and bis-ethylhexyloxyphenol methoxyphenyl triazine, and more preferred are 2-ethylhexyl paramethoxycinnamate, 4-t-butyl-4'-methoxydibenzoylmethane, and bis-ethylhexyloxyphenol methoxyphenyl triazine.

[0013] The oil-in-water sunscreen cosmetic of the present invention can contain one UV absorber alone or in combination of two or more as component (A), preferably a combination of two or more, and more preferably a combination of three: 2-ethylhexyl paramethoxycinnamate, 4-t-butyl-4'-methoxydibenzoylmethane, and bis-ethylhexyloxyphenol methoxyphenyl triazine, in order to efficiently enhance the UV protection effect of the sunscreen cosmetic. When these three are combined, the total amount of 4-t-butyl-4'-methoxydibenzoylmethane and bis-ethylhexyloxyphenol methoxyphenyl triazine is preferably not more than half the amount of 2-ethylhexyl paramethoxycinnamate.

[0014] The content of component (A) in the oil-in-water sunscreen cosmetic of the present invention is 1 to 25% by mass, preferably 5 to 20% by mass, and more preferably 8 to 18% by mass. If the content of component (A) is too low, the moisturizing feeling may be insufficient, while if the content of component (A) is too high, the lack of stickiness when applied to sweaty skin and ease of rinsing may be insufficient.

[0015] [(B) Component] The component (B) used in the oil-in-water sunscreen cosmetic of the present invention is a copolymer having structural units represented by the following formulas (1) and (2). [ka] (In formula (1), R 1represents a hydrogen atom or a methyl group.

[0016] The structural unit represented by the above formula (1) is a structural unit based on 2-(meth)acryloyloxyethyl phosphorylcholine. Here, "(meth)acryloyl" means "acryloyl or methacryloyl." R in formula (1) 1 may be a hydrogen atom or a methyl group, but is preferably a methyl group. That is, the structural unit represented by formula (1) is preferably a structural unit based on 2-methacryloyloxyethyl phosphorylcholine.

[0017] [ka] (In formula (2), R 2 represents a hydrogen atom or a methyl group, and R 3 represents an alkyl group having 1 to 22 carbon atoms.

[0018] The structural unit represented by the above formula (2) is a structural unit based on alkyl (meth)acrylate. Here, "(meth)acrylic acid" means "acrylic acid or methacrylic acid." R in formula (2) 2 may be a hydrogen atom or a methyl group, but is preferably a methyl group.

[0019] The alkyl group in the alkyl (meth)acrylate, i.e., R in formula (2) 3 R is an alkyl group having 1 to 22 carbon atoms, and the alkyl group may be a linear alkyl group or a branched alkyl group. 3 Examples of the alkyl group include methyl, ethyl, butyl, pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, nonyl, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl, etc. Among these, linear alkyl groups such as ethyl, butyl, octyl, decyl, dodecyl, and octadecyl are preferred, and octadecyl is more preferred. R 3is an alkyl group having 1 to 22 carbon atoms, preferably an alkyl group having 2 to 22 carbon atoms, more preferably an alkyl group having 10 to 22 carbon atoms, and even more preferably an alkyl group having 16 to 20 carbon atoms.

[0020] In the component (B), the ratio of the content of the structural unit represented by the above formula (1) to the content of the structural unit represented by the above formula (2) [structural unit represented by formula (1)]:[structural unit represented by formula (2)] (n1:n2) is preferably 9:1 to 1:9, more preferably 8:2 to 2:8, in molar ratio. If the ratio (n2 / n1) (molar ratio) of the content of the structural unit represented by formula (2) to the content of the structural unit represented by formula (1) is too small, the non-stickiness when applied to sweaty skin may be insufficient. On the other hand, if the ratio (n2 / n1) is too large, the ease of rinsing may be insufficient.

[0021] The weight-average molecular weight of component (B) is, for example, 10,000 to 1,000,000, preferably 30,000 to 900,000, more preferably 50,000 to 800,000, even more preferably 100,000 to 700,000, and particularly preferably 200,000 to 600,000. If the weight-average molecular weight of component (B) is too low, the moisturizing feeling may be insufficient, while if the weight-average molecular weight of component (B) is too high, the lack of stickiness when applied to sweaty skin and ease of rinsing may be insufficient. The weight average molecular weight of the component (B) is measured by gel permeation chromatography (GPC) and is expressed as a molecular weight converted into polyethylene glycol.

[0022] The polymerization form of component (B) is not particularly limited, and may be a random copolymer or a block copolymer, but a random copolymer is preferred. Furthermore, component (B) is usually a binary copolymer consisting of a structural unit represented by the above formula (1) and a structural unit represented by the above formula (2), but it may also be a copolymer containing other structural units in addition to the structural units represented by formulas (1) and (2).

[0023] The other structural units that may be contained in component (B) can generally be appropriately selected from those that can serve as structural units of component (B) as long as they do not affect the effects of the present invention. Examples of monomers that form the other structural units include (meth)acrylic acid esters having a cyclic alkyl group such as cyclohexyl (meth)acrylate; (meth)acrylic acid esters containing an aromatic group such as benzyl (meth)acrylate and phenoxyethyl (meth)acrylate; styrene-based monomers such as styrene, methylstyrene, and chloromethylstyrene; vinyl ether-based monomers such as methyl vinyl ether and butyl vinyl ether; and vinyl ester-based monomers such as vinyl acetate and vinyl propionate. These other structural units may be contained in one or more types, and the content thereof in component (B) is preferably 40 mol % or less, and more preferably 20 mol % or less, based on the total amount of the structural units represented by formula (1) and formula (2).

[0024] Component (B) can be produced by a known production method. For example, component (B) can be produced by polymerizing a monomer mixture containing 2-(meth)acryloyloxyethyl phosphorylcholine, alkyl (meth)acrylate, and, if necessary, monomers corresponding to the other structural units in the presence of a radical polymerization initiator in an inert gas atmosphere such as nitrogen by a known method such as solution polymerization. The content ratio of each monomer in this case may be set to a ratio corresponding to the desired content ratio of each structural unit in component (B).

[0025] The oil-in-water sunscreen cosmetic of the present invention can contain one selected from the above-mentioned component (B), either alone or in combination of two or more. Component (B) can be one produced by the polymerization method described above, but commercially available products such as "Lipidure (registered trademark)-PMB (Ph10)", "Lipidure (registered trademark)-B" (Polyquaternium-51), "Lipidure (registered trademark)-S", and "Lipidure (registered trademark)-NR" (Polyquaternium-61) (all manufactured by NOF Corporation) can also be used.

[0026] The content of component (B) in the oil-in-water sunscreen cosmetic of the present invention is 0.01 to 3 mass%, preferably 0.1 to 2 mass%, and more preferably 0.1 to 0.8 mass%. If the content of component (B) is too low, the moisturizing feeling and non-stickiness when applied to sweaty skin may be insufficient, while if the content of component (B) is too high, the ease of rinsing may be insufficient. The content ratio of the component (A) to the component (B) [(A) / (B)] is preferably 10 to 80, more preferably 30 to 65, in order to prevent stickiness when applied to sweaty skin.

[0027] [(C) component] The component (C) used in the oil-in-water sunscreen cosmetic of the present invention is at least one selected from the group consisting of talc and silica. Talc and silica that can be used are commercially available as powders for cosmetics. The average particle size of talc and silica is, for example, 1 to 100 μm, preferably 1 to 50 μm, and more preferably 1 to 30 μm. The particle size can be measured by electron microscope observation or by a laser diffraction scattering method using a dry particle size distribution measuring device.

[0028] The oil-in-water sunscreen cosmetic of the present invention may contain, as component (C), one or a combination of two selected from the group consisting of talc and silica. It is preferable to contain both talc and silica in order to maintain a non-sticky feeling when applied to sweaty skin. The content of component (C) in the oil-in-water sunscreen cosmetic of the present invention is 0.1 to 15% by mass, preferably 0.5 to 10% by mass, and more preferably 1 to 7.5% by mass. If the content of component (C) is too low, the non-stickiness when applied to sweaty skin may be insufficient, while if the content of component (C) is too high, the moisturizing feeling and ease of rinsing may be insufficient.

[0029] [Other ingredients] The oil-in-water sunscreen cosmetic of the present invention generally contains water in addition to the above components (A) to (C). Examples of water include purified water such as distilled water and deionized water, tap water, and industrial water, and water suitable for producing cosmetics, quasi-drugs, pharmaceuticals, and the like is used. The water content in the oil-in-water sunscreen cosmetic of the present invention is set so that the total amount of components (A) to (C) after adding the additives described below as necessary is 100% by mass, and is typically 30% to 80% by mass, preferably 60% to 75% by mass, and more preferably 50% to 70% by mass.

[0030] In addition to the above components (A) to (C) and water, the oil-in-water sunscreen cosmetic of the present invention may contain, as necessary, general additives used in cosmetics, quasi-drugs, pharmaceuticals, etc., within limits that do not impair the characteristics of the present invention.

[0031] Examples of such additives include lower alcohols such as ethanol and isopropanol; polyhydric alcohols such as 1,3-butylene glycol, dipropylene glycol, propylene glycol, pentylene glycol, and glycerin; sugars such as lactose and sucrose; oils such as liquid paraffin, squalane, hydrogenated polyisobutene, cyclopentahexane, dimethicone, olive oil, sunflower oil, triethylhexanoin, isononyl isononanoate, octyldodecyl myristate, ethylhexyl palmitate, pentaerythrityl tetraethylhexanoate, jojoba oil, hydrogenated jojoba oil, shea butter, and beeswax; and acylmethicone. Examples of surfactants include anionic surfactants such as tiltaurine salts, alkyl ether sulfate ester salts, and amide ether sulfate ester salts; water-soluble polymers such as carboxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl methylcellulose; cationic polymers such as ceramide, cholesterol, and cationized cellulose; thickening polysaccharides such as xanthan gum; organic or inorganic salts such as citrate, malate, and salt; acids and alkalis as pH adjusters; parabens; preservatives; anti-inflammatory agents; disinfectants; viscosity adjusters; cooling agents; chelating agents; extracts derived from plants and animals; vitamins; amino acids; pigments; and fragrances.

[0032] The oil-in-water sunscreen cosmetic of the present invention may contain one of the above additives alone or two or more of them in combination, as needed. The content of the above-mentioned additives in the oil-in-water sunscreen cosmetic of the present invention can be set according to the amount normally used in cosmetics and the like depending on the purpose, but is usually 30% by mass or less, preferably 25% by mass or less.

[0033] [Method for preparing oil-in-water sunscreen cosmetics] The oil-in-water sunscreen cosmetic of the present invention is a cosmetic in which an oil phase is dispersed in a continuous aqueous phase, and its preparation method is not particularly limited, and it can be prepared by any conventional emulsification method such as normal phase emulsification, phase inversion emulsification, liquid crystal emulsification, or D-phase emulsification. The method for stirring and mixing the components (A), (B), and (C) and other additives is not particularly limited, and can be carried out by any known stirring and mixing method, including conventional emulsifying devices such as a stirrer, impeller stirrer, or homomixer. In order to maintain the oil-in-water sunscreen cosmetic of the present invention without stickiness when applied to sweaty skin, it is preferable to prepare a raw material premix in advance by stirring and mixing components (A), (B), a polyhydric alcohol such as 1,3-butylene glycol (BG), and water, and then to prepare the oil-in-water sunscreen cosmetic by mixing component (C), water and additives as needed, with this raw material premix. [Example]

[0034] The present invention will be explained in more detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0035] [Measurement of weight-average molecular weight of component (B)] The weight-average molecular weight was evaluated by gel permeation chromatography (GPC) using methanol / chloroform (weight ratio 4 / 6) as an eluent and polyethylene glycol as a standard, detected by refractive index.

[0036] [Synthesis of component (B)] Component (B) was synthesized as in Synthesis Examples 1 and 2. Table 1 shows the composition ratio and weight average molecular weight of each of the resulting copolymers.

[0037] (Synthesis Example 1) 3.57 g of 2-methacryloyloxyethyl phosphorylcholine (MPC) and 16.43 g of octadecyl methacrylate (C18MA) (monomer composition molar ratio, MPC / C18MA = 30 / 70) were dissolved in 180 g of n-butanol and placed in a four-necked flask. After blowing in nitrogen for 30 minutes, 0.82 g of azobisisobutyronitrile was added at 60°C and the mixture was polymerized for 8 hours. The polymerization solution was added dropwise to 3 liters of acetone while stirring, and the resulting precipitate was filtered and dried in vacuum at room temperature for 48 hours to obtain 15.8 g of powder. The resulting copolymer had a weight-average molecular weight of 326,000. This was designated Copolymer 1.

[0038] (Synthesis Example 2) According to the synthesis of Copolymer 1 in Synthesis Example 1, Copolymer 2 was synthesized using 2-methacryloyloxyethyl phosphorylcholine (MPC) and ethyl methacrylate (C2MA).

[0039] [Table 1]

[0040] [Examples 1 to 9, Comparative Examples 1 to 6] Each component was emulsified in the parts by mass shown in Tables 2 and 3 to prepare the oil-in-water sunscreen cosmetics of Examples 1 to 9 and Comparative Examples 1 to 6. Additives other than components (A), (B), and (C) are shown in Table 4. In Example 8, component (A), component (B), BG, and water were mixed and stirred at 80°C using a tabletop homogenizer (manufactured by Mizuho Industries) to prepare a raw material premix, and this raw material premix was mixed and stirred with an emulsion of the other components to prepare the oil-in-water sunscreen cosmetic of Example 8. The values ​​in Tables 2 to 4 are in mass %, and "-" in the tables indicates that the component in question is not contained. The raw materials shown below were used for each component.

[0041] <Component (A)> (A-1) Ingredient: 2-ethylhexyl paramethoxycinnamate "Uvinul MC80" (manufactured by BASF Japan) (A-2) Component: 4-t-butyl-4'-methoxydibenzoylmethane "PARSOL1789" (manufactured by DSM) Ingredient (A-3): Bisethylhexyloxyphenol methoxyphenyl triazine "Tinosorb S" (BASF Japan)

[0042] <(B) component> Component (B-1): Copolymer 1 obtained in Synthesis Example 1 Component (B-2): Copolymer 2 obtained in Synthesis Example 2

[0043] <(C) component> (C-1) Ingredient: Talc "Crown Talc JS" (manufactured by Matsumura Sangyo Co., Ltd., average particle size 16 μm) (C-2) Component: Silica "Silica Beads SB-300" (Miyoshi Chemicals, average particle size 5 μm)

[0044] <Additives> The 16 additives shown in Table 4 were used.

[0045] [evaluation] The oil-in-water sunscreen cosmetics prepared in each of the Examples and Comparative Examples were used as a panel of 20 women (aged 22 to 40), and each panelist spread 0.5 g of each oil-in-water sunscreen cosmetic on their face to evaluate (1) moisturizing sensation, (2) non-stickiness when applied to sweaty skin, (3) duration of non-stickiness when applied to sweaty skin, and (4) ease of rinsing.

[0046] (1) Moisturizing The moisturizing feeling after application was evaluated according to the following criteria. The total score of the 20 panelists was calculated and judged according to the following criteria. <Evaluation criteria> 2 points: If you feel that the moisturizing effect is sufficient 1 point: If you feel a moisturizing sensation 0 points: If you feel there is no moisturizing effect <Judgment criteria> ◎: Total score is 30 points or more ○: Total score is 20 or more but less than 30 points △: Total score is 10 or more but less than 20 points ×: Total points are less than 10 points

[0047] (2) No stickiness when applied to sweaty skin After one hour of light exercise and sweating, the subjects spread the product on their faces and evaluated the lack of stickiness upon application according to the following criteria. The total score of the 20 subjects was calculated and judged according to the following criteria. <Evaluation criteria> 2 points: If you feel no stickiness 1 point: If you feel that it is not sticky at all 0 points: If you feel sticky <Judgment criteria> ◎: Total score is 30 points or more ○: Total score is 20 or more but less than 30 points △: Total score is 10 or more but less than 20 points ×: Total points are less than 10 points

[0048] (3) Durability of non-stickiness when applied to sweaty skin After one hour of light exercise, the subjects were asked to apply the product to their sweaty faces and then evaluate the lack of stickiness one hour later according to the following criteria. The total score of the 20 subjects was calculated and judged according to the following criteria. <Evaluation criteria> 2 points: No stickiness felt even after 1 hour of application 1 point: If you feel that there is not much stickiness even after 1 hour of application 0 points: If you feel sticky 1 hour after application <Judgment criteria> ◎: Total score is 30 points or more ○: Total score is 20 or more but less than 30 points △: Total score is 10 or more but less than 20 points ×: Total points are less than 10 points

[0049] (4) Ease of washing off After application, the face was rinsed with lukewarm water and the ease of rinsing was evaluated according to the following criteria. The total score of the 20 panelists was calculated and evaluated according to the following criteria. <Evaluation criteria> 2 points: No slimy or sticky feeling after washing, and very easy to rinse off 1 point: If there is not much slimy or sticky feeling after washing and it feels easy to rinse off 0 points: If the product feels slimy or sticky after washing and is not easy to rinse off <Judgment criteria> ◎: Total score is 30 points or more ○: Total score is 20 or more but less than 30 points △: Total score is 10 or more but less than 20 points ×: Total points are less than 10 points

[0050] [Table 2]

[0051] [Table 3]

[0052] [Table 4]

[0053] As shown in Table 2, the oil-in-water sunscreen cosmetics of Examples 1 to 9 were evaluated as having excellent moisturizing properties, non-stickiness when applied to sweaty skin, the durability of non-stickiness when applied to sweaty skin, and ease of rinsing. In particular, Example 1, in which the contents of the (A) to (C) components were within the above-mentioned more preferred ranges, three types of (A) components were combined, the preferred (C) components talc and silica were used, and the (A) / (B) ratio was within the preferred range, was rated as "◎" in the three evaluation items of moisturizing feeling, non-stickiness when applied to sweaty skin, and ease of rinsing. Example 8, in which the contents of the (A) to (C) components were within the above-mentioned more preferred ranges, three types of (A) components were combined, the preferred (C) components talc and silica were used, the (A) / (B) ratio was within the preferred range, and a raw material premix prepared from the (A) components, the (B) components, BG, and water was added, was rated as "◎" in all evaluation items.

[0054] On the other hand, in Comparative Example 1, the content of component (A) was low, and therefore the moisturizing feeling was insufficient. In Comparative Example 2, the content of component (A) was high, so the lack of stickiness when applied to sweaty skin and ease of rinsing were insufficient. In Comparative Example 3, since component (B) was not contained, the moisturizing feeling, the lack of stickiness when applied to sweaty skin, and the durability of the lack of stickiness when applied to sweaty skin were insufficient. In Comparative Example 4, the content of component (B) was high, and therefore the ease of rinsing was insufficient. In Comparative Example 5, since component (C) was not contained, the lack of stickiness when applied to sweaty skin and the persistence of the lack of stickiness when applied to sweaty skin were insufficient. In Comparative Example 6, the moisturizing feeling was insufficient due to the high content of component (C).

Claims

[Claim 1] (A) 1 to 25 mass% of one or more ultraviolet absorbers, (B) 0.01 to 3 mass% of a copolymer having structural units represented by formula (1) and formula (2), 【Chemical 1】 (In formula (1), R １ represents a hydrogen atom or a methyl group.) 【Chemistry 2】 (In formula (2), R ２ represents a hydrogen atom or a methyl group, and R ３ represents an alkyl group having 1 to 22 carbon atoms. (C) An oil-in-water sunscreen cosmetic comprising 0.1 to 15% by mass of at least one selected from the group consisting of talc and silica, and wherein the mass ratio of component (A) to component (B) [(A) / (B)] is 10 to 80.

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