Oil-in-water emulsion cosmetics

Abstract

The oil-in-water emulsified cosmetic of the present invention contains the following components (A1), (A2), (B) and (C): component (A1): a water-insoluble organic ultraviolet absorber that is solid at 25°C, component (A2): a liquid oil, component (B): an acrylamide polymer, component (C): a hydrophobicized fine-particle metal oxide, wherein the mass ratio of the content of component (C) to the total content of component (A1) and component (A2) [(C) / (A1+A2)] is 0.25 or more and 1.8 or less, and the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene as component (A2) is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

Description

Technical Field

[0001] The present invention relates to an oil-in-water emulsified cosmetic having an excellent ultraviolet protection effect. Background Art

[0002] In recent years, the importance of UV protection in daily life has been increasing, and the demand for sunscreen cosmetics has also been expanding. Based on this market demand, water-in-oil emulsified sunscreen cosmetics have been developed that can easily give a refreshing feeling even after continuous use.

[0003] In these oil-in-water emulsion cosmetics, ultraviolet absorbers or ultraviolet scatterers are used to enhance the ultraviolet protection effect. In particular, 2-ethylhexyl p-methoxycinnamate and octocrylene (2-ethylhexyl 2-cyano-3,3-diphenyl-2-acrylate) used as ultraviolet absorbers are used in many sunscreen cosmetics because they have a maximum absorption wavelength in the UVB region and have a high affinity with oils.

[0004] However, these ultraviolet absorbers may irritate the skin of users with sensitive skin, and sunscreen cosmetics with reduced content of these ultraviolet absorbers have been proposed.

[0005] For example, Japanese Patent Laid-Open No. 2017-078054 (Patent Document 1) aims to provide a sunscreen cosmetic that can exert a high UV protection effect and has excellent stable usability even if the amount of ethylhexyl methoxycinnamate and octocrylene as liquid UV absorbers is reduced. It is recorded that: a sunscreen cosmetic contains a specific solid UV absorber, a specific ester oil, and an UV scattering agent with a refractive index within a specific range in specific amounts, and the total amount of ethylhexyl methoxycinnamate and octocrylene in the sunscreen cosmetic is 3% by mass or less. Summary of the invention

[0006] The oil-in-water emulsified cosmetic of the present invention comprises the following components (A1), (A2), (B) and (C):

[0007] Ingredient (A1): a water-insoluble organic UV absorber that is solid at 25°C,

[0008] Ingredient (A2): Liquid oil,

[0009] Ingredient (B): Acrylamide polymer,

[0010] Ingredient (C): hydrophobicized metal oxide particles,

[0011] The mass ratio of the content of the component (C) to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] is 0.25 or more and 1.8 or less;

[0012] As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic. DETAILED DESCRIPTION

[0013] It is known that the sunscreen cosmetics described in Patent Document 1 have insufficient UV protection effect and emulsification stability, and may feel sticky when applied to the skin, and may have poor adhesion when base makeup or foundation is applied thereon, and may cause oily sheen due to sebum.

[0014] The present invention relates to an oil-in-water emulsified cosmetic which has an excellent ultraviolet protection effect even if the content of 2-ethylhexyl p-methoxycinnamate and octocrylene is low, has excellent emulsification stability, has little stickiness when applied, has good makeup adhesion, and has suppressed oily shine caused by sebum.

[0015] The present inventors have found that an oil-in-water emulsion cosmetic containing a water-insoluble organic UV absorber that is solid at 25°C, a liquid oil, an acrylamide polymer, and a hydrophobized fine-particle metal oxide can be obtained, if the mass ratio of the content of the fine-particle metal oxide to the total content of the water-insoluble organic UV absorber and the liquid oil is within a specific range, and the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene used as the liquid oil is below a specific value in the total amount of the oil-in-water emulsion cosmetic. It has high emulsion stability, excellent UV protection ability, less stickiness when applied, good makeup adhesion, and suppressed oily shine due to sebum.

[0016] That is, the oil-in-water emulsified cosmetic according to the present invention is an oil-in-water emulsified cosmetic containing the following component (A1), component (A2), component (B) and component (C):

[0017] Ingredient (A1): a water-insoluble organic UV absorber that is solid at 25°C,

[0018] Ingredient (A2): Liquid oil,

[0019] Ingredient (B): Acrylamide polymer,

[0020] Ingredient (C): hydrophobicized metal oxide particles,

[0021] The mass ratio of the content of the component (C) to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] is 0.25 or more and 1.8 or less,

[0022] As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

[0023] The present invention can provide an oil-in-water emulsified cosmetic which has an excellent ultraviolet protection effect, is less sticky when applied, has good makeup adhesion, and has suppressed oily shine due to sebum, even if the content of 2-ethylhexyl p-methoxycinnamate and octocrylene is reduced.

[0024] [Oil-in-water emulsified cosmetics]

[0025] The oil-in-water emulsified cosmetic (hereinafter also referred to as "emulsified cosmetic") of the present invention is an oil-in-water emulsified cosmetic containing the following component (A1), component (A2), component (B) and component (C):

[0026] Ingredient (A1): a water-insoluble organic UV absorber that is solid at 25°C,

[0027] Ingredient (A2): Liquid oil,

[0028] Ingredient (B): Acrylamide polymer,

[0029] Ingredient (C): hydrophobicized metal oxide particles,

[0030] The mass ratio of the content of the component (C) to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] is 0.25 or more and 1.8 or less,

[0031] As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

[0032] In the present invention, “containing component (A1), component (A2), component (B) and component (C)” means “combining component (A1), component (A2), component (B) and component (C)”.

[0033] In the present invention, the so-called "liquid state" refers to a state with fluidity under 1 atmosphere and 25°C, that is, a state under temperature conditions above the melting point (in the case of amorphous substances without a melting point, a state under temperature conditions above the melting point). In addition, the so-called "solid state" refers to a state without fluidity under 1 atmosphere and 25°C, that is, a state under temperature conditions below the melting point (in the case of amorphous substances without a melting point, a state under temperature conditions below the melting point).

[0034] In the present invention, "water-insoluble" means that the solubility in water is 1 w / w% or less.

[0035] The oil-in-water emulsified cosmetic of the present invention has an excellent UV protection effect even if the content of 2-ethylhexyl p-methoxycinnamate and octocrylene is low, and has excellent emulsification stability, less stickiness during application, good makeup adhesion, and suppressed oily shine caused by sebum. Although the reason is not clear, it is considered to be as follows.

[0036] In the present invention, the surface of the fine metal oxide is hydrophobized, and by using an acrylamide polymer as a thickener for thickening the aqueous phase as a continuous phase, when the fine metal oxide is applied to an oil-in-water emulsified cosmetic, it is judged that the fine metal oxide can be stably present in the oil phase. In addition, by setting the mass ratio of the content of the fine metal oxide treated with hydrophobization to the total content of the solid non-water-soluble organic ultraviolet absorber and the liquid oil agent as the oil agent that becomes the oil phase to a predetermined range, the emulsification stability can be improved, and ultraviolet rays can be efficiently scattered or absorbed. Therefore, it is judged that even if the content of 2-ethylhexyl methoxycinnamate and octocrylene is low, the ultraviolet protection ability can still be improved, and the stickiness during application can be suppressed. In addition, when the oil-in-water emulsified cosmetic of the present invention is applied to the skin, by forming a coating film containing the above-mentioned oil agent and the fine metal oxide treated with hydrophobization, it is judged that the makeup can be well attached and the oily shine caused by sebum can be suppressed.

[0037] Here, 2-ethylhexyl p-methoxycinnamate and octocrylene used as liquid oil agents are components that cause stickiness when applied, and the oiliness of the skin is believed to be caused by the compatibility of these components with the high-refractive index oil contained in the sebum secreted from the skin. In the present invention, by making the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene below a specific value in the total amount of the oil-in-water emulsified cosmetic, it is believed that the stickiness when applied and the effect of suppressing the oiliness caused by sebum can be further enhanced.

[0038] <Component (A1): a water-insoluble organic UV absorber that is solid at 25°C>

[0039] The oil-in-water emulsified cosmetic of the present invention contains, as component (A1), a water-insoluble organic ultraviolet absorber that is solid at 25° C. from the viewpoint of enhancing the ultraviolet protection effect.

[0040] Examples of the component (A1) include 4-tert-butyl-4'-methoxydibenzoylmethane, 2-(4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 2-hydroxy-4-methoxybenzophenone, drometrizole trisiloxane, 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, and 2-ethylhexyl dimethoxybenzylidene dioxoimidazolinyl propionate. These water-insoluble organic ultraviolet absorbers may be contained alone or in combination of two or more.

[0041] Among these, component (A1) is preferably selected from 4-tert-butyl-4'-methoxydibenzoylmethane, 2-(4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 2-hydroxy-4-methoxybenzophenone, drometrizole trisiloxane, and 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6- One or more selected from (4-methoxyphenyl)-1,3,5-triazines, more preferably one or more selected from 2-(4-diethylamino-2-hydroxybenzoyl)benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, and 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine.

[0042] In the oil-in-water emulsified cosmetic of the present invention, the component (A1) is preferably present in a state of being dissolved in the component (A2).

[0043] Examples of commercially available products of the component (A1) include: “PARSOL 1789” (4-tert-butyl-4′-methoxydibenzoylmethane) (manufactured by DSM); “UVINUL A PLUS” (2-(4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester), “UVINUL T-150” (2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine), “UVINUL M40” (2-hydroxy-4-methoxybenzophenone), “TINOSORB S” (2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine) (all manufactured by BASF); “Mosacare A440” (drometrizole trisiloxane) (manufactured by UFC CORPORATION); “SOFT SHADE DH" (2-ethylhexyl dimethoxybenzylidene dioxoimidazolinium propionate) (manufactured by Ajinomoto Co., Ltd.) and the like.

[0044] The content of the ingredient (A1) in the total amount of the oil-in-water emulsified cosmetic of the present invention is preferably 0.5% by mass or more, more preferably 0.7% by mass or more, further preferably 1% by mass or more, and further preferably 2% by mass or more from the viewpoint of enhancing the ultraviolet protection effect; and from the viewpoint of suppressing the stickiness during application and suppressing the oiliness caused by sebum, it is preferably 10% by mass or less, more preferably 8% by mass or less, further preferably 6% by mass or less, and further preferably 5% by mass or less. More specifically, it is preferably 0.5 to 10% by mass, more preferably 0.7 to 8% by mass, further preferably 1 to 6% by mass, and further preferably 2 to 5% by mass.

[0045] <Ingredient (A2): Liquid oil>

[0046] The oil-in-water emulsified cosmetic of the present invention contains a liquid oil as a component (A2) from the viewpoints of dissolving the component (A1), introducing the component (C), and improving the emulsification stability.

[0047] Component (A2) is an oil having fluidity under 1 atmosphere and 25°C as described above.

[0048] The oil-in-water emulsified cosmetic of the present invention may contain a liquid organic ultraviolet absorber as the above-mentioned component (A2) from the viewpoint of further improving the ultraviolet protection effect.

[0049] Examples of the liquid organic ultraviolet absorber of component (A2) include: cinnamic acid ultraviolet absorbers such as 2-ethylhexyl p-methoxycinnamate, 2-ethoxyethyl p-methoxycinnamate, a mixture of isopropyl p-methoxycinnamate and diisopropyl cinnamate, and methylbis(trimethylsiloxy)silylisoamyl trimethoxycinnamate; para-aminobenzoic acid ultraviolet absorbers such as amyl p-(dimethylamino)benzoate and 2-ethylhexyl p-(dimethylamino)benzoate; salicylic acid ultraviolet absorbers such as ethylene glycol salicylate, 2-ethylhexyl salicylate, butyloctyl salicylate, benzyl salicylate, and trimethylcyclohexyl salicylate; octocrylene; diethyl polydimethylsiloxane benzalmalonate; a copolymer of adipic acid and neopentyl glycol having its ends capped with octyldodecyl alcohol or cyanodiphenylacrylate, and the like. These liquid organic ultraviolet absorbers may be contained alone or in appropriate combination of two or more.

[0050] Examples of commercially available liquid organic ultraviolet absorbers include: “UVINUL MC80” (2-ethylhexyl p-methoxycinnamate) (manufactured by BASF); “PARSOL 340” (octocrylene) (manufactured by DSM Nutrition Japan Co., Ltd.); “PARSOL EHS” (2-ethylhexyl salicylate), “PARSOL HMS” (trimethylcyclohexyl salicylate), “PARSOL SLX” (polysilicone-15 (INCI name: Polysilicone-15) (diethyl dimethicone benzalmalonate)) (all manufactured by DSM); and “Polycrylene” (polyester-8 (INCI name: Polyester-8) (a copolymer of adipic acid and neopentyl glycol with octyldodecyl alcohol or cyanodiphenylacrylate blocked at the ends) (manufactured by Hallstar).

[0051] Among them, the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene as component (A2) is 2% by mass or less, preferably 1.5% by mass or less, more preferably 1% by mass or less, further preferably 0.7% by mass or less, further preferably 0.5% by mass or less, further preferably 0.3% by mass or less, further preferably 0% by mass or less, in the total amount of the oil-in-water emulsified cosmetic from the viewpoint of suppressing stickiness during application and suppressing oily shine due to sebum, that is, 2-ethylhexyl p-methoxycinnamate and octocrylene are not contained.

[0052] Component (A2) preferably contains other liquid oils other than the above-mentioned liquid organic ultraviolet absorber from the viewpoints of dissolving component (A1), introducing component (C), and improving emulsification stability. The other liquid oils are not particularly limited as long as they are liquid under an environment of 1 atmosphere and 25° C., and examples thereof include oils commonly used in cosmetics.

[0053] As other liquid oils, preferably, there can be mentioned one or more selected from ester oils, silicone oils, hydrocarbon oils, higher alcohols, and higher fatty acids. The liquid oils may be contained alone or in appropriate combination of two or more.

[0054] Examples of the ester oil include synthetic ester oils, natural oils and fats, and for example, esters of monocarboxylic acid and monohydric alcohol, esters of monocarboxylic acid and polyhydric alcohol, and esters of polycarboxylic acid and monohydric alcohol.

[0055] Examples of the esters of monocarboxylic acids and monohydric alcohols include esters represented by the following general formula (1):

[0056] R 1 -COO-R 2 (1)

[0057] In the general formula (1), R 1 represents a linear or branched alkyl or alkenyl group having 1 to 25 carbon atoms, or an aromatic hydrocarbon group having 6 to 24 carbon atoms, which may be substituted with a hydroxyl group; R 2 It represents a linear or branched alkyl or alkenyl group having 1 to 30 carbon atoms.

[0058] In R 1 When R is an alkyl or alkenyl group, 1 The number of carbon atoms in the moiety is preferably 7 or more, and is preferably 23 or less, more preferably 21 or less, further preferably 19 or less, and further preferably 17 or less.

[0059] In R 1 In the case of an aromatic hydrocarbon group, R 1 The number of carbon atoms in is preferably 6 or more, and is preferably 22 or less, and more preferably 20 or less.

[0060] R 2 The number of carbon atoms is preferably 2 or more, and is preferably 28 or less, more preferably 24 or less, further preferably 22 or less, and further preferably 20 or less.

[0061] Specific examples of the ester represented by the general formula (1) include cetyl isooctanoate (cetyl 2-ethylhexanoate), stearyl isooctanoate, isononyl isononanoate, isotridecyl isononanoate, hexyl laurate, isostearyl laurate, butyl myristate, isopropyl myristate, decyl myristate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, 2-octyldodecyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, esters, isostearyl palmitate, 2-hexyldecyl palmitate, 2-ethylhexyl stearate, 2-hexyldecyl stearate, isopropyl isostearate, 2-hexyldecyl isostearate, ethyl oleate, isodecyl oleate, oleyl oleate, 2-octyldodecyl oleate, ethyl linoleate, isopropyl linoleate, lanolin acetate, castor oil fatty acid methyl ester (methyl ricinoleate), and alkyl benzoate (alkyl group has 12 to 15 carbon atoms).

[0062] Examples of esters of monocarboxylic acids and monohydric alcohols include esters represented by the following general formula (2):

[0063] R 3 -COO-(AO) n -R 4 (2)

[0064] In the general formula (2), R 3 represents a linear or branched alkyl or alkenyl group having 1 to 25 carbon atoms which may be substituted with a hydroxyl group; R4 represents an aromatic hydrocarbon group having 6 to 24 carbon atoms. AO represents an alkyleneoxy group having 2 to 4 carbon atoms; and n represents an average number of added moles of 1 to 50.

[0065] R 3 The alkyl group preferably has 7 or more carbon atoms, and preferably has 23 or less carbon atoms, more preferably has 21 or less carbon atoms, and further preferably has 19 or less carbon atoms.

[0066] R 4 It is preferably an aromatic hydrocarbon group having 6 or more carbon atoms, and preferably 22 or less, more preferably 20 or less, and further preferably 18 or less carbon atoms, and is more preferably a benzyl group.

[0067] The alkyleneoxy group represented by AO is preferably a propyleneoxy group, and n is preferably 1 to 10, more preferably 1 to 5.

[0068] Specific examples of the ester represented by the general formula (2) include esters of myristic acid and a propylene oxide 3-mol addition product of benzyl alcohol (CRODAMOL STS manufactured by CRODA), and esters of 2-ethylhexanoic acid and a propylene oxide 3-mol addition product of benzyl alcohol (CRODAMOL SFX manufactured by CRODA).

[0069] Examples of esters of monocarboxylic acids and polyols include esters represented by the following general formula (3):

[0070] R 5 -(OCOR 6 ) p (3)

[0071] In the general formula (3), R 5 represents a polyol residue, preferably a hydrocarbon group having 2 to 10 carbon atoms; R 6 represents a monocarboxylic acid residue having 1 to 25 carbon atoms; and p represents an integer of 2 to 10.

[0072] In addition, R 5 It may have an ether bond, and is preferably a straight-chain or branched hydrocarbon group having a carbon number of 2 to 10. In addition, p is preferably the same value as the hydroxyl group of the above-mentioned polyol.

[0073] R 6 The number of carbon atoms in the alkyl group is preferably 5 or more, more preferably 7 or more, and from the same viewpoint as above, it is preferably 23 or less, more preferably 21 or less, further preferably 19 or less, and further preferably 17 or less.

[0074] Examples of the ester represented by the general formula (3) include propylene glycol dicaprate, propylene glycol dioleate, neopentyl glycol dicaprate, neopentyl glycol di-2-ethylhexanoate, propylene glycol di(caprylate / caprate), propylene glycol diisostearate, ethylene glycol di-2-ethylhexanoate, tri(caprylate / caprate)glyceryl, tri-2-ethylhexanoate, tri-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, and natural oils and fats.

[0075] Examples of the natural oils and fats include triglycerides such as avocado oil, olive oil, sesame oil, rice bran oil, castor oil, soybean oil, corn oil, rapeseed oil, castor oil, cottonseed oil, and mink oil.

[0076] Examples of esters of polycarboxylic acids and monohydric alcohols include esters represented by the following general formula (4):

[0077] R 7 -(COOR 8 ) q (4)

[0078] In the general formula (4), R 7 represents a polycarboxylic acid residue having 2 or more and 10 or less carbon atoms; R 8 represents a monohydric alcohol residue having 1 to 25 carbon atoms, and q is an integer of 2 to 10. In addition, q is preferably the same value as the carboxyl group of the above-mentioned polycarboxylic acid.

[0079] R 8 The number of carbon atoms is preferably 3 or more, and from the same viewpoint as described above, it is preferably 23 or less, more preferably 21 or less, and further preferably 19 or less.

[0080] Specific examples thereof include diisostearyl malate, di-2-ethylhexyl succinate, diisobutyl adipate, di-2-heptylundecanedioate, di-2-ethylhexyl sebacate, diisopropyl sebacate, and tri-2-ethylhexyl trimellitate.

[0081] Among these, the ester oil is preferably an ester represented by the general formula (1), the general formula (3) or the general formula (4) from the viewpoint of dissolving the component (A1), introducing the component (C) and achieving good emulsion stability, and more preferably a monoester of a linear or branched fatty acid having 8 to 18 carbon atoms and a linear or branched monohydric alcohol having 2 to 24 carbon atoms, a triester of a branched fatty acid having 6 to 18 carbon atoms and glycerol, a tetraester of a branched fatty acid having 6 to 18 carbon atoms and pentaerythritol, a diester of a branched fatty acid having 6 to 18 carbon atoms and a branched dihydric alcohol having 2 to 10 carbon atoms, a triester of a branched monohydric alcohol having 6 to 18 carbon atoms and trimellitic acid, and an alkyl (C12-15) benzoate (e.g., "Finsolv TN" (Innospec Active Chemicals LLC)), more preferably one or more selected from cetyl 2-ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate, 2-octyldodecyl myristic acid, isopropyl palmitate, tri-2-ethylhexanoin glyceryl, pentaerythritol tetra-2-ethylhexanoate, diisopropyl sebacate, tri-2-ethylhexyl trimellitate, and alkyl (C12-15) benzoate.

[0082] The silicone oil is preferably dimethyl polysiloxane, and more preferably has a kinematic viscosity of 5,000 mm / s at 25° C., from the viewpoint of dissolving the component (A1), introducing the component (C), and achieving good emulsification stability. 2 / s or less dimethyl polysiloxane.

[0083] The 25° C. kinematic viscosity of the silicone oil can be measured using an Ubbelohde viscometer in accordance with ASTM D 445-46T or JIS Z 8803.

[0084] Examples of commercially available silicone oils include “KF-96A-6cs” (dimethyl polysiloxane), “KF-96A-10cs” (dimethyl polysiloxane), “KF-96A-20cs” (dimethyl polysiloxane), and “KF-96A-100cs” (dimethyl polysiloxane) manufactured by Shin-Etsu Chemical Co., Ltd.

[0085] Specific examples of the hydrocarbon oil include liquid paraffin, hydrogenated polyisobutene (liquid isoparaffin, heavy liquid isoparaffin), cycloparaffin, liquid ozokerite, squalene, squalane, isooctadecane, α-olefin oligomers, polybutene, isohexadecane, and the like.

[0086] Examples of the higher alcohol include branched or unsaturated higher alcohols having 12 to 24 carbon atoms, such as 2-octyldodecanol, isostearyl alcohol, and oleyl alcohol. Among them, branched or unsaturated higher monohydric alcohols having 12 to 24 carbon atoms are preferred.

[0087] Examples of the higher fatty acid include fatty acids having 12 to 22 carbon atoms, such as oleic acid and isostearic acid.

[0088] From the viewpoint of dissolving component (A1), introducing component (C), and improving emulsification stability, component (A2) preferably contains at least one selected from ester oils and silicone oils, more preferably contains at least one selected from esters represented by general formula (1), general formula (3), or general formula (4), and dimethyl polysiloxane, and further preferably contains at least one selected from linear or branched fatty acids having 8 to 18 carbon atoms and linear or branched monostyrene having 2 to 24 carbon atoms. Monoesters of polyols, triesters of branched fatty acids having 6 to 18 carbon atoms and glycerol, tetraesters of branched fatty acids having 6 to 18 carbon atoms and pentaerythritol, diesters of branched fatty acids having 6 to 18 carbon atoms and branched diols having 2 to 10 carbon atoms, triesters of branched monohydric alcohols having 6 to 18 carbon atoms and trimellitic acid, alkyl benzoates (C12-15), and a 25°C kinematic viscosity of 5,000 mm 2 / s or less dimethyl polysiloxane, more preferably containing cetyl 2-ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate, 2-octyldodecyl myristate, isopropyl palmitate, tri-2-ethylhexanoin glyceryl, pentaerythritol tetra-2-ethylhexanoate, diisopropyl sebacate, tri-2-ethylhexyl trimellitate, alkyl benzoate (C12-15), and a kinematic viscosity of 5,000 mm at 25°C. 2 One or more selected from dimethyl polysiloxanes having a molecular weight of less than 1.1747 W / s.

[0089] The content of the component (A2) in the total amount of the oil-in-water emulsified cosmetic of the present invention is preferably 5% by mass or more, more preferably 7% by mass or more, and further preferably 10% by mass or more, from the viewpoint of introducing the component (C) and improving the emulsification stability, and is preferably 30% by mass or less, more preferably 25% by mass or less, further preferably 20% by mass or less, and further preferably 17% by mass or less, from the viewpoint of suppressing the stickiness during application, improving the adhesion of the makeup, and suppressing the oiliness caused by sebum. More specifically, it is preferably 5 to 30% by mass, more preferably 7 to 25% by mass, further preferably 10 to 20% by mass, and further preferably 10 to 17% by mass.

[0090] When component (A2) contains one or more selected from ester oils and silicone oils as other liquid oil agents other than the liquid organic ultraviolet absorber, the total content of the ester oil and the silicone oil in component (A2) is preferably 50% by mass or more, more preferably 70% by mass or more, further preferably 80% by mass or more, further preferably 90% by mass or more, further preferably 95% by mass or more, and preferably 100% by mass or less.

[0091] The mass ratio [(A2) / (A1)] of the content of the component (A2) to the content of the component (A1) in the total amount of the oil-in-water emulsified cosmetic of the present invention (hereinafter also referred to as "content mass ratio [(A2) / (A1)]") is preferably 1 or more, more preferably 2 or more, further preferably 3 or more, further preferably 4 or more, further preferably 5 or more, from the viewpoint of dissolving the component (A1), introducing the component (C), and improving the emulsification stability, and is preferably 20 or less, more preferably 15 or less, further preferably 10 or less, further preferably 7 or less from the viewpoint of improving the ultraviolet protection effect. More specifically, it is preferably 1 to 20, more preferably 2 to 15, further preferably 3 to 10, further preferably 4 to 10, further preferably 4 to 7, further preferably 5 to 7.

[0092] <Ingredient (B): Acrylamide polymer>

[0093] The oil-in-water emulsified cosmetic of the present invention contains an acrylamide polymer as component (B) from the viewpoint of increasing the viscosity of the aqueous phase as the continuous phase, allowing the fine metal oxide to be stably present in the oil phase, and improving the emulsification stability.

[0094] From the same viewpoint as described above, component (B) preferably contains a structural unit derived from one or more acrylamide monomers selected from acrylamide and acryloyldimethyltaurate (hereinafter also referred to as "AMPS"); more preferably, it contains one or more structural units selected from homopolymers of acrylamide, homopolymers of AMPS and salts thereof, and copolymers containing the following structural units, derived from one or more acrylamide monomers selected from acrylamide and AMPS; further preferably, it contains one or more structural units selected from homopolymers of acrylamide, copolymers containing the following structural units, derived from one or more acrylamide monomers selected from acrylamide and AMPS and salts thereof.

[0095] Specific examples of component (B) include polyacrylamide (homopolymer of acrylamide), (acrylamide / acrylic acid) copolymers, (AMPS / acrylic acid) copolymers, (AMPS / acrylamide) copolymers, (AMPS / acrylamide / acrylic acid) copolymers, (AMPS / dimethylacrylamide) copolymers, (AMPS / hydroxyethyl acrylate) copolymers, (AMPS / vinyl pyrrolidone) copolymers, (AMPS / vinyl formamide) copolymers, (AMPS / polyoxyethylene alkyl methacrylic acid (average number of ethylene oxide added moles: 10 to 30)) copolymers, and salts thereof.

[0096] More specific examples of the above copolymers and their salts include (sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer (INCI name: Hydroxyethyl Acrylate / Sodium AcryloyldimethylTaurate Copolymer), (sodium acryloyldimethyltaurate / sodium acrylic acid) copolymer (INCI name: Sodium Acrylate / Sodium Acryloyldimethyl Taurate Copolymer), (sodium acryloyldimethyltaurate / sodium acrylic acid / dimethylacrylamide) crosspolymer (INCI name: Sodium Acrylate / Acryloyldimethyltaurate / Dimethylacrylamide Crosspolymer), (ammonium acryloyldimethyltaurate / vinyl pyrrolidone) copolymer (INCI name: Ammonium Acryloyldimethyltaurate / VPCopolymer), (Sodium Acryloyldimethyltaurate / Acrylic Acid / Acrylamide / Sodium Acrylate) Copolymer (INCI name: Polyacrylate-13), (Ammonium Acryloyldimethyltaurate / Dimethylacrylamide / Lauryl Methacrylate / Laureth-4 Methacrylate) Crosspolymer (INCI name: Polyacrylate Crosspolymer-6), (Ammonium Acryloyldimethyltaurate / Beheneth-25 Methacrylate Crosspolymer) and (Ammonium Acryloyldimethyltaurate / Steareth-25 Methacrylate Crosspolymer).

[0097] Examples of commercially available products containing component (B) include: “SEPIGEL 501” (polyacrylamide, polysorbate 85, mineral oil, isoparaffin), “SEPIGEL 305” (polyacrylamide, hydrogenated polyisobutene (or (C13,14) isoparaffin), laureth-7, water), “SIMULGEL EG” ((sodium acryloyldimethyltaurate / sodium acrylate) copolymer, isohexadecane, polysorbate 80), “SEPIMAX ZEN” ((ammonium acryloyldimethyltaurate / dimethylacrylamide / lauryl methacrylate / laureth-4 methacrylate) crosspolymer), “SEPINOV EMT 10” ((sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, sorbitan isostearate, polysorbate 60), “SIMULGEL "NS" ((sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, squalane, polysorbate 60, water), "SIMULGEL FL" ((sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, isohexadecane, polysorbate 60, water), "SEPIPLUS S" ((sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, polyisobutylene, PEG-7 trimethylolpropane coconut oil alkyl ether, water), "SEPIPLUS 400" ((sodium acryloyldimethyltaurate / acrylic acid / acrylamide / sodium acrylate) copolymer, polyisobutylene, polysorbate 20, water) (all manufactured by SEPPIC); "Aristoflex AVC" ((ammonium acryloyldimethyltaurate / vinyl pyrrolidone) copolymer, tert-butyl alcohol, water), "Aristoflex HMB" ((ammonium acryloyldimethyltaurate / beheneth-25 methacrylate) crosspolymer, t-butyl alcohol, water), "Aristoflex HMS" ((ammonium acryloyldimethyltaurate / stearylmethacrylate) crosspolymer) (all manufactured by Clariant).

[0098] Among these, component (B) is more preferably one or more selected from polyacrylamide, (Na acryloyldimethyltaurate / Na acrylic acid) copolymer, (Na acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, and (ammonium acryloyldimethyltaurate / vinylpyrrolidone) copolymer.

[0099] The content of the component (B) in the total amount of the oil-in-water emulsified cosmetic of the present invention is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more, and is preferably 3% by mass or less, more preferably 2% by mass or less, even more preferably 1.5% by mass or less, and even more preferably 1% by mass or less, from the viewpoint of increasing the viscosity of the aqueous phase as the continuous phase, allowing the fine metal oxide to be stably present in the oil phase, and improving the emulsification stability. More specifically, it is preferably 0.1 to 3% by mass, more preferably 0.3 to 2% by mass, even more preferably 0.3 to 1.5% by mass, even more preferably 0.5 to 1.5% by mass, and even more preferably 0.5 to 1% by mass.

[0100] <Component (C): Hydrophobicized fine-particle metal oxide>

[0101] The oil-in-water emulsified cosmetic of the present invention contains, as a component (C), fine particles of a hydrophobized metal oxide from the viewpoint of absorbing or scattering ultraviolet rays and enhancing the ultraviolet protection effect.

[0102] The fine-particle metal oxide of component (C) is preferably one or more selected from fine-particle zinc oxide, fine-particle titanium oxide, and fine-particle cerium oxide, and more preferably one or more selected from fine-particle zinc oxide and fine-particle titanium oxide, from the viewpoint of absorbing or scattering ultraviolet rays and improving the ultraviolet protection effect. In addition, these fine-particle metal oxides may contain a divalent or higher metal, and the fine-particle metal oxides may contain metals such as iron, zirconium, calcium, manganese, magnesium, yttrium, or oxides thereof, either alone or in combination of two or more metals.

[0103] Examples of the hydrophobic treatment of component (C) include silicone treatment, alkyl alkoxysilane treatment, fatty acid treatment, fluorine-containing compound treatment using perfluoroalkyl phosphate, perfluoroalcohol, etc., amino acid treatment using N-acylglutamic acid, etc., lecithin treatment, metal soap treatment, alkyl phosphate treatment, ASI treatment using N-acylamino acid metal salt (sodium lauroyl aspartate), zinc chloride and alkoxyalkyl titanium (isopropyl titanium triisostearate), etc.

[0104] These surface treatments may be used alone or in combination of two or more.

[0105] Among these, the hydrophobic treatment of component (C) is preferably one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment from the viewpoint of improving the dispersibility of component (C) in the oil-in-water emulsion cosmetic, enhancing the UV protection effect and emulsification stability, and suppressing the friction feeling after application and making the makeup adhere better.

[0106] Examples of the surface treatment agent used in the silicone treatment include various silicone oils such as methylpolysiloxane, dimethylpolysiloxane (polydimethylsiloxane), methylphenylpolysiloxane, methylhydrogenpolysiloxane, dimethylsiloxane / methylhydrogensiloxane copolymer (hydrogenated polydimethylsiloxane), methylcyclopolysiloxane, dodecamethylcyclohexasiloxane, tetradecamethylhexasiloxane, dimethylsiloxane / methyl (polyoxyethylene) siloxane / methyl (polyoxypropylene) siloxane copolymer, dimethylsiloxane / methyl (polyoxyethylene) siloxane copolymer, dimethylsiloxane / methyl (polyoxypropylene) siloxane copolymer, dimethylsiloxane / methyl cetyloxysiloxane copolymer, dimethylsiloxane / methylstearyloxysiloxane copolymer, and (alkyl acrylate / polydimethylsiloxane) copolymer. Among these, the surface treatment agent used in the silicone treatment is preferably dimethylpolysiloxane (polydimethylsiloxane), methylhydrogenpolysiloxane, dimethylsiloxane / methylhydrogensiloxane copolymer (hydrogenated polydimethylsiloxane), and more preferably methylhydrogenpolysiloxane and dimethylsiloxane / methylhydrogensiloxane copolymer (hydrogenated polydimethylsiloxane), from the viewpoint of improving the dispersibility of the component (C) in the oil-in-water emulsion cosmetic, enhancing the UV protection effect and emulsion stability, and suppressing the friction feeling after application and making the makeup adhere well.

[0107] The surface treatment agent used in the alkylalkoxysilane treatment is preferably an alkylalkoxysilane having a linear or branched alkyl group having 6 to 20 carbon atoms, more preferably octyltriethoxysilane (triethoxyoctanoylsilane), octyltrimethoxysilane (trimethoxyoctanoylsilane), and even more preferably octyltriethoxysilane (triethoxyoctanoylsilane), from the viewpoint of improving the dispersibility of the component (C) in the oil-in-water emulsion cosmetic, enhancing the UV protection effect and emulsion stability, and suppressing the friction feeling after application and making the makeup adhere well.

[0108] Examples of the surface treatment agent used in the fatty acid treatment include straight-chain or branched higher fatty acids having 12 to 22 carbon atoms. Among these, the surface treatment agent used in the fatty acid treatment is preferably a straight-chain or branched higher fatty acid having 14 to 22 carbon atoms, more preferably a straight-chain or branched higher fatty acid having 16 to 20 carbon atoms, and even more preferably stearic acid or isostearic acid, from the viewpoint of improving the dispersibility of the component (C) in the oil-in-water emulsified cosmetic, enhancing the UV protection effect and emulsification stability, and suppressing the friction feeling after application and making the makeup adhere well.

[0109] As described above, the hydrophobic treatment of the component (C) is more preferably one or more selected from silicone treatment using at least one selected from methyl hydrogen polysiloxane and dimethyl siloxane / methyl hydrogen siloxane copolymer as a surface treatment agent, alkyl alkoxy silane treatment, and fatty acid treatment from the viewpoint of improving the dispersibility of the component (C) in the oil-in-water emulsion cosmetic, enhancing the UV protection effect and emulsion stability, and suppressing the friction feeling after application and making the makeup adhere well; more preferably, it is one or more selected from silicone treatment using at least one selected from methyl hydrogen polysiloxane and dimethyl siloxane / methyl hydrogen siloxane copolymer as a surface treatment agent, alkyl alkoxy silane treatment using as a surface treatment agent an alkyl alkoxy silane having a linear or branched alkyl group having 6 to 20 carbon atoms, and fatty acid treatment using as a surface treatment agent a linear or branched higher fatty acid having 14 to 22 carbon atoms.

[0110] The surface treatment agents may be used alone or in combination of two or more.

[0111] Furthermore, when titanium oxide is used as the metal oxide of component (C), from the viewpoint of reducing the photocatalytic activity, in addition to the surface treatment agent used for the aforementioned hydrophobic treatment, a treatment agent such as silicon dioxide, hydrated silicon dioxide, or hydroxide of a metal such as aluminum may be used in combination.

[0112] The amount of the hydrophobic treatment of the component (C) is preferably 0.1% by mass or more, and is preferably 40% by mass or less, and more preferably 30% by mass or less, in the component (C), from the viewpoint of improving the dispersibility of the component (C) in the oil-in-water emulsified cosmetic, enhancing the UV protection effect and the emulsification stability, and suppressing the friction feeling after application and achieving good makeup adhesion.

[0113] In the present invention, the mass of the component (C) and the average primary particle size described below refer to the mass and the average primary particle size including the surface treatment agent.

[0114] The shape of the component (C) includes, for example, spherical, flake, plate, rod, spindle, needle, and irregular shapes, and any shape can be used.

[0115] The average primary particle size of component (C) is preferably 1 μm or less, more preferably 800 nm or less, further preferably 500 nm or less, further preferably 300 nm or less, further preferably 200 nm or less, further preferably 100 nm or less, further preferably 90 nm or less, further preferably 50 nm or less, further preferably 40 nm or less from the viewpoint of improving the ultraviolet protection effect and emulsification stability, and is preferably 1 nm or more, more preferably 5 nm or more, further preferably 10 nm or more from the viewpoint of versatility. More specifically, the average primary particle size of component (C) is preferably 1 nm to 1 μm, more preferably 1 to 800 nm, further preferably 5 to 500 nm, further preferably 5 to 300 nm, further preferably 5 to 200 nm, further preferably 5 to 100 nm, further preferably 5 to 90 nm, further preferably 5 to 50 nm, further preferably 10 to 50 nm, further preferably 10 to 40 nm from the viewpoint of versatility.

[0116] The average primary particle size of the component (C) of the present invention can be obtained by observing the image using a transmission electron microscope (TEM). Specifically, the TEM is used for observation at an observation magnification of 50,000 times, and the maximum short diameter of 300 primary particles in the observation image is measured, and the number average is calculated to obtain the average. The so-called "maximum short diameter" here means that when the component (C) has a shape other than a thin sheet or a plate, the short diameter orthogonal to the long diameter has the longest length. In addition, when the component (C) has a thin sheet or plate shape, the thickness of 300 primary particles in the observation image observed under the same conditions as above is measured, and the number average is calculated to obtain the average. Specifically, the measurement is performed using the method described in the embodiment.

[0117] Component (C) is the particulate metal oxide before the hydrophobic treatment as component (C '), using the aforementioned surface treatment agent, and can be prepared by known methods. For example, as the surface treatment using the above-mentioned silicone oil, as described in Japanese Patent No. 3187440, the particulate metal oxide such as particulate zinc oxide, after being covered in a non-gas phase state with at least one of the silicone compounds (but, silane compounds except) composed of organopolysiloxanes and silicone resins, by being calcined at 600 to 950 ° C in an oxygen-containing atmosphere, the surface of the particulate metal oxide covered with silicon oxide can be prepared. Again, as the surface treatment using the above-mentioned alkyl alkoxy silane, as described in Japanese Patent Unexamined No. 2007-326902, the particulate metal oxide is covered with a specific polysiloxane compound, and then the method for surface treatment of the alkyl alkoxy silane in water can be prepared.

[0118] The preferred embodiment and measuring method of the average primary particle size of the component (C′) (fine-particle metal oxide before the hydrophobizing treatment) used in the hydrophobizing treatment are the same as those of the component (C).

[0119] Examples of commercially available hydrophobized fine-particle zinc oxide include FINEX series (manufactured by Sakai Chemical Industry Co., Ltd.), MZ series, and MZY series (all manufactured by TAYCA Corporation).

[0120] Examples of commercially available hydrophobized titanium oxide microparticles include STR series (manufactured by Sakai Chemical Industry Co., Ltd.); TTO-55 series, TTO-51 series (all manufactured by Ishihara Sangyo Co., Ltd.); MT series, MTY series (all manufactured by TAYCA Corporation).

[0121] The content of the ingredient (C) in the total amount of the oil-in-water emulsified cosmetic of the present invention is preferably 1% by mass or more, more preferably 3% by mass or more, further preferably 7% by mass or more, and further preferably 10% by mass or more from the viewpoint of improving the ultraviolet protection effect, and is preferably 30% by mass or less, more preferably 27% by mass or less, further preferably 25% by mass or less, and further preferably 20% by mass or less from the viewpoint of improving the emulsification stability. More specifically, from the viewpoint of improving the ultraviolet protection effect and improving the emulsification stability, it is preferably 1 to 30% by mass, more preferably 3 to 30% by mass, further preferably 7 to 27% by mass, further preferably 7 to 25% by mass, further preferably 10 to 25% by mass, and further preferably 10 to 20% by mass.

[0122] The mass ratio of the content of the component (C) in the total amount of the oil-in-water emulsified cosmetic of the present invention to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] (hereinafter also referred to as "the content mass ratio [(C) / (A1+A2)]") is preferably 0.25 or more, more preferably 0.30 or more, further preferably 0.40 or more, further preferably 0.50 or more, further preferably 0.60 or more, from the viewpoint of improving the ultraviolet protection effect and the emulsification stability, and from the viewpoint of improving the adhesion of the makeup and suppressing the oiliness caused by sebum. Furthermore, from the viewpoint of suppressing the stickiness during application, it is preferably 1.8 or less, more preferably 1.5 or less, further preferably 1.3 or less, further preferably 1.0 or less, further preferably 0.80 or less. More specifically, it is preferably 0.30 to 1.5, more preferably 0.40 to 1.3, further preferably 0.50 to 1.0, further preferably 0.50 to 0.80, further preferably 0.60 to 0.80.

[0123] The oil-in-water emulsified cosmetic of the present invention may contain, in addition to component (A1), component (A2), component (B) and component (C), any component used in accordance with the purpose of the cosmetic, as long as the effect of the present invention is not impaired. Examples of such optional components include ultraviolet absorbers, oils, surfactants, water-soluble polymers, neutralizers, pH adjusters, bactericides, anti-inflammatory agents, preservatives, colorants, chelating agents, whitening agents, antiperspirants, insect repellents, physiologically active ingredients, salts, antioxidants, fragrances, etc. other than component (A1), component (A2), component (B) and component (C).

[0124] <Ingredient (D): Polyol>

[0125] The oil-in-water emulsified cosmetic of the present invention preferably further contains a polyol as a component (D) from the viewpoint of suppressing stickiness during application and achieving good makeup adhesion.

[0126] As component (D), for example, diols such as ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol (average molecular weight less than 650), 1,2-propylene glycol (propylene glycol), 1,3-propylene glycol (propanediol), dipropylene glycol, polypropylene glycol (average molecular weight less than 650), isoprene glycol, 1,3-butylene glycol, etc.; trivalent or higher polyols such as glycerol, diglycerol, and polyglycerol. Among these, component (D) is preferably a polyol having 2 to 12 carbon atoms, more preferably a polyol having 2 to 6 carbon atoms, further preferably one or more selected from ethylene glycol, diethylene glycol, 1,2-propylene glycol (propylene glycol), 1,3-propylene glycol (propanediol), dipropylene glycol, 1,3-butylene glycol, and glycerol, and further preferably one or more selected from propylene glycol, dipropylene glycol, 1,3-butylene glycol, and glycerol. These alcohols can be used alone or in combination of two or more.

[0127] The content of the component (D) in the total amount of the oil-in-water emulsified cosmetic of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more, further preferably 2% by mass or more, further preferably 3% by mass or more, further preferably 4% by mass or more, further preferably 5% by mass or more, and preferably 15% by mass or less, more preferably 13% by mass or less, further preferably 10% by mass or less, from the viewpoint of suppressing stickiness during application and making the makeup adhere well, and more preferably 0.5 to 15% by mass, more preferably 1 to 13% by mass, further preferably 2 to 13% by mass, further preferably 3 to 10% by mass, further preferably 4 to 10% by mass, further preferably 5 to 10% by mass.

[0128] The content of the component (D) in the total amount of the oil-in-water emulsified cosmetic of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more, further preferably 2% by mass or more, and further preferably 3% by mass or more, and is preferably 15% by mass or less, more preferably 13% by mass or less, further preferably 10% by mass or less, further preferably 7% by mass or less, and further preferably 5% by mass or less, from the viewpoint of suppressing stickiness during application, making the makeup adhere well, and suppressing the oiliness caused by sebum. More specifically, it is preferably 0.5 to 15% by mass, more preferably 1 to 13% by mass, further preferably 2 to 13% by mass, further preferably 3 to 10% by mass, further preferably 3 to 7% by mass, and further preferably 3 to 5% by mass.

[0129] <Ingredient (E): Surfactant>

[0130] The oil-in-water emulsified cosmetic of the present invention preferably further contains a surfactant as a component (E) from the viewpoint of obtaining good emulsification stability.

[0131] The component (E) is not particularly limited, and any of nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants can be used. These can be used alone or in combination of two or more.

[0132] Among these, component (E) is preferably a nonionic surfactant, for example: sorbitan fatty acid ester, polyoxyalkylene hydrogenated castor oil, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene alkyl ether, polyether-modified silicone, etc. Specific examples include: sorbitan monostearate, sorbitan monoisostearate, polyoxyethylene hydrogenated castor oil (EO average addition mole number 60), polyoxyethylene hydrogenated castor oil (EO average addition mole number 40), polyoxyethylene sorbitan monolaurate (EO average addition mole number 20), polyoxyethylene sorbitan monostearate (EO average addition mole number 20), polyoxyethylene sorbitan oleate (EO average addition mole number 20), polyoxyethylene (EO average addition mole number 7) lauryl ether, polyoxyethylene (EO average addition mole number 7) trimethylolpropane coconut oil alkyl ether, polydimethicone copolyol, etc. These nonionic surfactants can be used alone or in combination of two or more.

[0133] The content of ingredient (E) in the total amount of the oil-in-water emulsified cosmetic of the present invention is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more, and is preferably 3% by mass or less, more preferably 2% by mass or less, and even more preferably 1% by mass or less. More specifically, it is preferably 0.1 to 3% by mass, more preferably 0.3 to 2% by mass, and even more preferably 0.5 to 1% by mass.

[0134] <Component (F): Other water-soluble polymers>

[0135] The oil-in-water emulsified cosmetic of the present invention preferably further contains, as component (F), another water-soluble polymer having a thickening effect in addition to component (B), from the viewpoint of obtaining good emulsification stability.

[0136] The component (F) is not limited as long as it is a component generally used in cosmetics, and any of natural polymers, semi-synthetic polymers, and synthetic polymers other than the component (B) can be used.

[0137] Examples of natural polymers include xanthan gum, carrageenan, alginic acid, etc. Among them, xanthan gum is preferred from the viewpoint of obtaining good emulsion stability.

[0138] Examples of the semisynthetic polymer include modified polysaccharides such as hydroxycellulose, hydroxypropylcellulose, sodium carboxymethylcellulose, methylcellulose, hydroxymethylcellulose, and cationized cellulose.

[0139] Examples of synthetic polymers other than component (B) include acrylic polymers other than component (B) such as carbomer (cross-linked polyacrylic acid), polyacrylic acid, sodium polyacrylate, and (acrylic acid / alkyl methacrylate) copolymers; polyvinyl pyrrolidone, polyvinyl alcohol, and cationized polyvinyl pyrrolidone.

[0140] Examples of commercially available carbomers include "Carbopol 910", "Carbopol 934", "Carbopol 940", "Carbopol 941", "Carbopol 980" and "Carbopol 981" (all manufactured by Lubrizol Advanced Materials).

[0141] Examples of commercially available (acrylic acid / alkyl methacrylate) copolymers include "Carbopol 1382", "Carbopol ETD2020", "PEMULEN TR-1", and "PEMULEN TR-2" (all manufactured by Lubrizol Advanced Materials).

[0142] The content of ingredient (F) in the total amount of the oil-in-water emulsified cosmetic of the present invention is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, and even more preferably 0.07% by mass or more from the viewpoint of obtaining good emulsification stability, and is preferably 5% by mass or less, more preferably 3% by mass or less, and even more preferably 1% by mass or less from the viewpoint of good feeling during use. More specifically, it is preferably 0.01 to 5% by mass, more preferably 0.05 to 3% by mass, and even more preferably 0.07 to 1% by mass.

[0143] (Aqueous medium)

[0144] The oil-in-water emulsified cosmetic of the present invention contains at least water as an aqueous medium in addition to component (D). In the present invention, as an aqueous medium other than component (D) and water, a saturated monohydric alcohol having 1 to 3 carbon atoms, such as ethanol, propanol, isopropanol, etc., may be further contained.

[0145] The content of the aqueous medium other than the component (D) in the total amount of the oil-in-water emulsified cosmetic of the present invention may be within the range that allows the oil-in-water emulsified cosmetic to be obtained, and from the viewpoint of improving the emulsification stability, it is preferably 40% by mass or more, more preferably 45% by mass or more, further preferably 50% by mass or more, further preferably 55% by mass or more, further preferably 60% by mass or more, and preferably 90% by mass or less, more preferably 80% by mass or less, further preferably 75% by mass or less. More specifically, it is preferably 40 to 90% by mass, more preferably 45 to 80% by mass, further preferably 50 to 75% by mass, further preferably 55 to 75% by mass, further preferably 60 to 75% by mass.

[0146] The oil-in-water emulsified cosmetic of the present invention is suitable for use as hair cosmetics such as shampoo, conditioner, and hair treatment; and skin cosmetics such as facial cleansers, makeup removers, sunscreen cosmetics, facial masks, and massage cosmetics. Among these, the oil-in-water emulsified cosmetic of the present invention is preferably used for sunscreen purposes because of its excellent ultraviolet protection effect, and is suitable for sunscreen cosmetics (skin lotions, creams, emulsions, beauty essences, etc.), suntanning agents, makeup base cosmetics, foundations, etc.

[0147] The oil-in-water emulsified cosmetic of the present invention may be in the form of a liquid, emulsion, cream, paste, solid, or multilayered formulation, or may be in the form of a tablet, spray, or mousse.

[0148] (Method for producing oil-in-water emulsified cosmetics)

[0149] The method for producing the oil-in-water emulsified cosmetic of the present invention is not particularly limited, and a known method can be appropriately used according to the dosage form of the oil-in-water emulsified cosmetic. For example, there can be mentioned a method comprising the step of uniformly mixing component (A1), component (A2), component (B), component (C) and, if necessary, the aforementioned optional components using a homogenizer or the like.

[0150] As the method for producing the oil-in-water emulsified cosmetic of the present invention, from the viewpoint of improving the dispersibility of the component (C) in the oil-in-water emulsified cosmetic, enhancing the ultraviolet protection effect and the emulsification stability, and from the viewpoint of suppressing the stickiness during application, making the makeup adhere well, and suppressing the oily shine caused by sebum, it is preferred to use a method comprising the step of mixing and emulsifying the following dispersion, wherein the dispersion is a dispersion in which the component (C) is dispersed in an oil phase component containing the component (A1), the component (A2) and the above-mentioned oil-soluble optional component as required, and the preparation is a preparation of an aqueous phase component containing the component (B), an aqueous medium and the above-mentioned water-soluble optional component added as required, and more preferably a method comprising the following steps I to III.

[0151] Step I: a step of adding component (C) to component (A1), component (A2), and the above-mentioned oil-soluble optional component as required, and uniformly mixing them to obtain a dispersion (i) in which component (C) is dispersed;

[0152] Step II: a step of uniformly mixing an aqueous phase component containing component (B), an aqueous medium, and, if necessary, the aforementioned water-soluble optional component to obtain a preparation (ii);

[0153] Step III: A step of adding the dispersion (i) obtained in step I to the prepared product (ii) obtained in step II, uniformly mixing and emulsifying the mixture to obtain an oil-in-water emulsified cosmetic.

[0154] From the viewpoint of improving the dispersibility of the ingredient (C) in the oil-in-water emulsified cosmetic, step I preferably includes the following steps I-1 and I-2.

[0155] Step I-1: a step of uniformly mixing an oil phase component containing the component (A1), the component (A2), and the above-mentioned oil-soluble optional component as required to obtain a preparation (i');

[0156] Step I-2: A step of adding the component (C) to the prepared product (i') obtained in step I-1, and uniformly mixing the mixture to obtain a dispersion (i) in which the component (C) is dispersed.

[0157] The mixing of the oil phase components in step I-1 and the mixing of the water phase components in step II are preferably performed while stirring while heating in a temperature range of 20° C. to 90° C. inclusive.

[0158] In step II, the obtained preparation (ii) is preferably obtained by cooling to a temperature range of preferably 15° C. to 35° C. and then uniformly mixing.

[0159] In step III, the dispersion (i) obtained in step I is preferably added while stirring the prepared product (ii) obtained in step II at a temperature preferably between 30° C. and 90° C., and mixed uniformly to emulsify.

[0160] Regarding the above-mentioned embodiments, the present invention further discloses the following embodiments.

[0161] <1> An oil-in-water emulsified cosmetic comprising the following components (A1), (A2), (B) and (C):

[0162] Ingredient (A1): a water-insoluble organic UV absorber that is solid at 25°C,

[0163] Ingredient (A2): Liquid oil,

[0164] Component (B): at least one selected from homopolymers of acrylamide, copolymers containing structural units derived from acrylamide monomers, and salts thereof, wherein the acrylamide monomers are at least one selected from acrylamide and acryloyldimethyltaurine,

[0165] Component (C): at least one selected from hydrophobized zinc oxide microparticles and titanium oxide microparticles,

[0166] The mass ratio of the content of the component (C) to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] is 0.30 or more and 1.5 or less;

[0167] As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

[0168] <2> The oil-in-water emulsified cosmetic according to <1> above, further comprising a polyol as a component (D).

[0169] <3> The oil-in-water emulsified cosmetic according to <2> above, wherein the content of the component (D) in the total amount of the oil-in-water emulsified cosmetic is 1% by mass or more and 13% by mass or less.

[0170] <4> The oil-in-water emulsified cosmetic according to <2> or <3> above, wherein the content of the component (D) in the total amount of the oil-in-water emulsified cosmetic is 3% by mass or more and 10% by mass or less.

[0171] <5> The oil-in-water emulsified cosmetic according to any one of <1> to <4> above, wherein the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 0.7% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

[0172] <6> The oil-in-water emulsified cosmetic according to any one of <1> to <4> above, wherein the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 0.3% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

[0173] <7> The oil-in-water emulsion cosmetic according to any one of <1> to <6> above, wherein the mass ratio of the content of component (C) in the total amount of the oil-in-water emulsion cosmetic to the total content of component (A1) and component (A2) [(C) / (A1+A2)] is 0.40 or more and 1.3 or less.

[0174] <8> The oil-in-water emulsified cosmetic according to any one of <1> to <7>, wherein the hydrophobic treatment of component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment.

[0175] <9> The oil-in-water emulsion cosmetic according to any one of <1> to <7>, wherein the hydrophobic treatment of component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment using one or more selected from methylhydrogenpolysiloxane and dimethylsiloxane / methylhydrogensiloxane copolymer (hydrogenated polydimethylsiloxane) as a surface treatment agent.

[0176] <10> The oil-in-water emulsified cosmetic according to any one of <1> to <9>, wherein the average primary particle size of the component (C) is 1 nm to 800 nm.

[0177] <11> The oil-in-water emulsified cosmetic according to any one of <1> to <9>, wherein the average primary particle size of the component (C) is 5 nm to 100 nm.

[0178] <12> The oil-in-water emulsified cosmetic according to any one of <1> to <11>, wherein the content of the component (C) in the total amount of the oil-in-water emulsified cosmetic is 3% by mass or more and 30% by mass or less.

[0179] <13> The oil-in-water emulsified cosmetic according to any one of <1> to <11>, wherein the content of the component (C) in the total amount of the oil-in-water emulsified cosmetic is 7% by mass or more and 25% by mass or less.

[0180] <14> The oil-in-water emulsified cosmetic according to any one of <1> to <13> above, wherein the content of the component (B) in the total amount of the oil-in-water emulsified cosmetic is 0.1% by mass or more and 3% by mass or less.

[0181] <15> The oil-in-water emulsified cosmetic according to any one of <1> to <13>, wherein the content of the component (B) in the total amount of the oil-in-water emulsified cosmetic is 0.3% by mass or more and 2% by mass or less.

[0182] <16> The oil-in-water emulsion cosmetic according to any one of <1> to <15>, wherein component (B) is one or more selected from polyacrylamide, (sodium acryloyldimethyltaurate / sodium acrylic acid) copolymer, (sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, and (ammonium acryloyldimethyltaurate / vinylpyrrolidone) copolymer.

[0183] <17> The oil-in-water emulsified cosmetic according to any one of <1> to <16>, wherein the component (A2) contains one or more selected from ester oils and silicone oils.

[0184] <18> The oil-in-water emulsion cosmetic according to any one of <1> to <17>, wherein the component (A1) is one or more selected from 4-tert-butyl-4′-methoxydibenzoylmethane, 2-(4-diethylamino-2-hydroxybenzoyl)benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 2-hydroxy-4-methoxybenzophenone, drometrizole trisiloxane, and 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine.

[0185] <19> The oil-in-water emulsified cosmetic according to any one of <1> to <18> above, which is used for sunscreen applications.

[0186] <20> An oil-in-water emulsified cosmetic for sunscreen use, comprising: the following ingredients (A1), (A2), (B), (C) and (D):

[0187] Ingredient (A1): a water-insoluble organic UV absorber that is solid at 25°C,

[0188] Ingredient (A2): Liquid oil,

[0189] Component (B): at least one selected from homopolymers of acrylamide, copolymers containing structural units derived from acrylamide monomers, and salts thereof, wherein the acrylamide monomers are at least one selected from acrylamide and acryloyldimethyltaurine,

[0190] Component (C): at least one selected from hydrophobicized fine-particle zinc oxide and fine-particle titanium oxide having an average primary particle size of 1 nm to 800 nm,

[0191] Ingredient (D): polyol,

[0192] The mass ratio of the content of the component (C) to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] is 0.30 or more and 1.5 or less;

[0193] As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic;

[0194] The content of the component (D) is 1% by mass or more and 13% by mass or less.

[0195] <21> An oil-in-water emulsified cosmetic for sunscreen use, comprising: the following components (A1), (A2), (B), (C) and (D):

[0196] Ingredient (A1): a water-insoluble organic UV absorber that is solid at 25°C,

[0197] Ingredient (A2): Liquid oil,

[0198] Component (B): at least one selected from homopolymers of acrylamide, copolymers containing structural units derived from acrylamide monomers, and salts thereof, wherein the acrylamide monomers are at least one selected from acrylamide and acryloyldimethyltaurine,

[0199] Component (C): at least one selected from hydrophobicized fine-particle zinc oxide and fine-particle titanium oxide having an average primary particle size of 5 nm to 100 nm,

[0200] Ingredient (D): polyol,

[0201] The mass ratio of the content of the component (C) to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] is 0.40 or more and 1.3 or less;

[0202] As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic;

[0203] The content of the component (D) is 3% by mass or more and 10% by mass or less.

[0204] <22> An oil-in-water emulsified cosmetic for sunscreen use, comprising: the following ingredients (A1), (A2), (B) and (C):

[0205] Ingredient (A1): a water-insoluble organic UV absorber that is solid at 25°C,

[0206] Ingredient (A2): Liquid oil,

[0207] Component (B): at least one selected from homopolymers of acrylamide, copolymers containing structural units derived from acrylamide monomers, and salts thereof, wherein the acrylamide monomers are at least one selected from acrylamide and acryloyldimethyltaurine,

[0208] Component (C): at least one selected from hydrophobicized fine-particle zinc oxide and fine-particle titanium oxide having an average primary particle size of 5 nm to 100 nm,

[0209] The mass ratio of the content of the component (C) to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] is 0.40 or more and 1.3 or less;

[0210] As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic;

[0211] The hydrophobic treatment of component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment using one or more selected from methylhydrogenpolysiloxane and dimethylsiloxane / methylhydrogensiloxane copolymer (hydrogenated polydimethylsiloxane) as a surface treatment agent.

[0212] <23> An oil-in-water emulsified cosmetic for sunscreen use, comprising: the following ingredients (A1), (A2), (B), (C) and (D):

[0213] Ingredient (A1): a water-insoluble organic UV absorber that is solid at 25°C,

[0214] Ingredient (A2): Liquid oil,

[0215] Component (B): at least one selected from homopolymers of acrylamide, copolymers containing structural units derived from acrylamide monomers, and salts thereof, wherein the acrylamide monomers are at least one selected from acrylamide and acryloyldimethyltaurine,

[0216] Component (C): at least one selected from hydrophobicized fine-particle zinc oxide and fine-particle titanium oxide having an average primary particle size of 5 nm to 100 nm,

[0217] Ingredient (D): polyol,

[0218] The mass ratio of the content of the component (C) to the total content of the component (A1) and the component (A2) [(C) / (A1+A2)] is 0.40 or more and 1.3 or less;

[0219] As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic;

[0220] The hydrophobic treatment of component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment using one or more selected from methyl hydrogen polysiloxane and dimethylsiloxane / methyl hydrogen siloxane copolymer (hydrogenated polydimethylsiloxane) as a surface treatment agent;

[0221] The content of the component (D) is 1% by mass or more and 13% by mass or less.

[0222] <24> The oil-in-water emulsion cosmetic according to any one of <20> to <23>, wherein the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 0.7% by mass or less in the total amount of the oil-in-water emulsion cosmetic.

[0223] <25> The oil-in-water emulsion cosmetic according to any one of <20> to <23>, wherein the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 0.3% by mass or less in the total amount of the oil-in-water emulsion cosmetic.

[0224] <26> The oil-in-water emulsified cosmetic according to any one of <20> to <25>, wherein the content of the component (C) in the total amount of the oil-in-water emulsified cosmetic is 3% by mass or more and 30% by mass or less.

[0225] <27> The oil-in-water emulsified cosmetic according to any one of <20> to <25>, wherein the content of the component (C) in the total amount of the oil-in-water emulsified cosmetic is 7% by mass or more and 25% by mass or less.

[0226] <28> The oil-in-water emulsified cosmetic according to any one of <20> to <27>, wherein the content of the component (B) in the total amount of the oil-in-water emulsified cosmetic is 0.1% by mass or more and 3% by mass or less.

[0227] <29> The oil-in-water emulsified cosmetic according to any one of <20> to <27>, wherein the content of the component (B) in the total amount of the oil-in-water emulsified cosmetic is 0.3% by mass or more and 2% by mass or less.

[0228] <30> The oil-in-water emulsion cosmetic according to any one of <20> to <29>, wherein component (B) is one or more selected from polyacrylamide, (sodium acryloyldimethyltaurate / sodium acrylic acid) copolymer, (sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, and (ammonium acryloyldimethyltaurate / vinylpyrrolidone) copolymer.

[0229] <31> The oil-in-water emulsified cosmetic according to any one of <20> to <30>, wherein the component (A2) contains one or more selected from ester oils and silicone oils.

[0230] <32> The oil-in-water emulsion cosmetic according to any one of <20> to <31>, wherein the component (A1) is one or more selected from 4-tert-butyl-4′-methoxydibenzoylmethane, 2-(4-diethylamino-2-hydroxybenzoyl)benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 2-hydroxy-4-methoxybenzophenone, drometrizole trisiloxane, and 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine.

[0231] [Example]

[0232] Hereinafter, the present invention will be described in detail using Examples and Comparative Examples, but the present invention is not limited thereto.

[0233] (Average primary particle size of component (C) and component (C'))

[0234] The average primary particle diameter of the component (C) and the component (C′) is measured by the following method.

[0235] When the measurement sample has a shape other than a thin sheet or a plate, the measurement sample dispersion prepared in advance is placed on the sample stage of a transmission electron microscope (TEM) (trade name "JEM1400Plus", manufactured by JEOL Ltd.), air-dried, and then observed using TEM at an observation magnification of 50,000 times, and the maximum minor diameter of 300 primary particles in the observed image is measured, and the number average is set as the average primary particle size of each particle. The "maximum minor diameter" here refers to the minor diameter with the longest length among the minor diameters orthogonal to the major diameter.

[0236] When the measurement sample has a flake or plate shape, the thickness of 300 primary particles in the observation image observed in the same method and observation magnification as above is measured, and the number average is set as the average primary particle size.

[0237] 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 dispersing the mixture by ultrasonic wave.

[0238] Preparation Example 1 (Preparation of polydimethylsiloxane-treated zinc oxide microparticles C1)

[0239] 88 parts by mass of zinc oxide fine particles (spherical, average primary particle size 25 nm) as component (C') and dimethyl polysiloxane (polydimethylsiloxane) (kinematic viscosity 20 mm 2 / s, Shin-Etsu Chemical Co., Ltd.) 12 parts by mass were added to toluene, stirred thoroughly, and then heated under reduced pressure to remove toluene. The obtained powder was crushed using an ultrafine grinder. Next, a high-temperature heating furnace was used to perform a calcination treatment at 800°C for 2 hours in air to obtain polydimethylsiloxane-treated fine zinc oxide C1 as component (C).

[0240] Preparation Example 2 (Preparation of methyl hydrogen polysiloxane treated microparticle zinc oxide C2)

[0241] A slurry consisting of 93 parts by mass of fine-particle zinc oxide (slightly spherical, with an average primary particle size of 35 nm) as component (C'), 7 parts by mass of methyl hydrogen polysiloxane ("KF-99P" manufactured by Shin-Etsu Chemical Co., Ltd.) as a surface treatment agent, and isopropyl alcohol was prepared. After sufficient stirring and pulverization, the solvent was distilled off by heating under reduced pressure, and the mixture was heated at 150°C for 4 hours in air to obtain methyl hydrogen polysiloxane-treated fine-particle zinc oxide C2 as component (C).

[0242] Preparation Example 3 (Preparation of triethoxycaprylylsilane-treated microparticle zinc oxide C3)

[0243] A slurry consisting of 93 parts by mass of fine zinc oxide (substantially spherical, with an average primary particle size of 35 nm) as component (C'), 7 parts by mass of octyltriethoxysilane (triethoxycaprylylsilane) as a surface treatment agent, and toluene was prepared, and the mixture was pulverized and crushed using a bead mill (a bead mill manufactured by SHINMARU ENTERPRISES). Subsequently, toluene was distilled off by heating under reduced pressure, and then the mixture was heated at 150°C for 4 hours using an air flow dryer to obtain triethoxycaprylylsilane-treated fine zinc oxide C3 as component (C).

[0244] Preparation Example 4 (Preparation of polydimethylsiloxane-treated titanium oxide microparticle C4)

[0245] 88 parts by mass of titanium oxide microparticles (substantially spherical, average primary particle size 10 nm) as component (C') and dimethyl polysiloxane (polydimethylsiloxane) (kinematic viscosity 20 mm 2 / s, Shin-Etsu Chemical Co., Ltd.) 12 parts by mass were added to toluene, stirred thoroughly, and then heated under reduced pressure to remove toluene. The obtained powder was crushed using an ultrafine grinder. Then, a high-temperature heating furnace was used to calcine at 800°C in air for 2 hours to obtain polydimethylsiloxane-treated fine titanium oxide C4 as component (C).

[0246] [Examples 1 to 26, Comparative Examples 1 to 6, Reference Example 1]

[0247] According to the formulations shown in Tables 1 to 4, each oil-in-water emulsified cosmetic was obtained by the following method.

[0248] Components 1 to 21 and 46 shown in Tables 1 to 4 were uniformly mixed and heated to 80°C to dissolve to obtain a preparation (i') (step I-1). Then, while the obtained preparation (i') was maintained at 80°C, components 27 to 33 shown in Tables 1 to 4 were added and uniformly mixed to disperse to obtain a dispersion (i) (step I-2).

[0249] Separately, components 22 to 26, 34 to 45, 49, and 50 shown in Tables 1 to 4 were heated to 40°C to dissolve, and naturally cooled to 25°C, and then components 47 and 48 were added and uniformly mixed to obtain a preparation (ii) (step II).

[0250] The dispersion (i) maintained at 80° C. was added to the obtained preparation (ii) while stirring, and the mixture was uniformly mixed using a homomixer to emulsify the mixture to obtain an oil-in-water emulsified cosmetic (step III).

[0251] The obtained oil-in-water emulsified cosmetics were used to evaluate the following: (1) UV protection ability, (2) emulsion stability, and (3) feeling in use (no stickiness when applying, good adhesion of makeup immediately after application, and no oily feeling caused by sebum 3 hours after application).

[0252] In addition, since Comparative Examples 2 and 3 were inhomogeneous and separated into an oil phase and a water phase immediately after preparation, only the emulsion stability was evaluated, and the ultraviolet protection ability and the feeling during use were not evaluated.

[0253] The results are shown in Tables 1 to 4.

[0254] (1) Ultraviolet protection

[0255] The oil-in-water emulsified cosmetics shown in Tables 1 to 4 were deposited on a square PMMA plate ("HD6" manufactured by Helio Screen) at a density of 1.3 mg / cm 2 The sample was evenly applied with the amount of coating, and dried naturally for 15 minutes to form a test sample. Each sample was irradiated with ultraviolet light from a certain distance (10 mm) using an SPF analyzer (Optometices). The SPF analyzer was used to detect 10 locations in each sample with a wavelength range of 290 to 400 nm for the penetrating ultraviolet light at this time, and the averaged spectrum was obtained to calculate the SPF value.

[0256] From each SPF value, the UV protection capability improvement rate relative to Reference Example 1 (wherein the component (A1) in Example 1 was replaced with purified water) without the component (A1) was calculated according to the following formula and evaluated according to the following evaluation criteria.

[0257] Ultraviolet protection ability improvement rate (%) = [(SPF value of the example or comparative example) / (SPF value of reference example 1)] × 100

[0258] [Evaluation criteria for improvement in UV protection capability]

[0259] 5: More than 250%

[0260] 4: 200% or more and less than 250%

[0261] 3: 150% or more and less than 200%

[0262] 2: 100% or more and less than 150%

[0263] 1: Less than 100%

[0264] (2) Emulsion stability

[0265] The emulsified state of the oil-in-water emulsified cosmetics immediately after preparation shown in Tables 1 to 4 was observed under a microscope and visually for appearance, and evaluated according to the following criteria.

[0266] [Judgment criteria]

[0267] 5: Component (C) enters the inner phase (oil phase), and the emulsified particle size shows a very narrow particle size distribution in the range of 10 to 50 μm, forming beautiful emulsified particles with a slightly spherical shape without aggregation. Even with visual observation, it still presents a beautiful and gorgeous appearance.

[0268] 4: Component (C) enters the inner phase (oil phase), and the emulsified particle size shows a narrow particle size distribution in the range of 10 to 100 μm, forming beautiful emulsified particles with a slightly spherical shape without aggregation of emulsified particles. Even with visual observation, it still presents a beautiful appearance without roughness.

[0269] 3: Component (C) enters the inner phase (oil phase) and forms emulsified particles, but the emulsified particles aggregate one day after preparation.

[0270] 2: Although the component (C) entered the inner phase (oil phase), the emulsified particles were not uniform and agglomerated immediately after preparation. The appearance was also slightly rough when visually observed.

[0271] 1: Component (C) leaked to the external phase (aqueous phase), or emulsified particles were not formed, and the phase was separated into an oil phase and an aqueous phase, and an uneven appearance was observed by visual observation.

[0272] (3) Feeling of use (no stickiness when applying, good adhesion of makeup immediately after application, and no oily feeling caused by sebum after 3 hours after application)

[0273] The oil-in-water emulsified cosmetics shown in Tables 1 to 4 were tested by 10 professional cosmetics reviewers. Each professional reviewer used each cosmetic and evaluated and scored "no stickiness when applied", "good makeup adhesion immediately after application", and "no oily feeling caused by sebum after 3 hours after application" in 5 levels according to the following evaluation criteria, and the average value was calculated from the total score of the 10 professional reviewers. The average values ​​of each evaluation are shown in Tables 1 to 4.

[0274] The higher the average value, the better the effect. If the average value exceeds 4.0, it is rated as very good. If the average value is 4.0 or less and exceeds 3.0, it is rated as good. If the average value is 3.0 or less and exceeds 2.0, it is rated as slightly poor. If the average value is 2.0 or less, it is rated as poor.

[0275] In addition, regarding the “good degree of makeup adhesion immediately after application”, the good degree of makeup adhesion was evaluated when each water-in-oil emulsion cosmetic was applied to the skin and foundation was applied thereon; regarding the “no oily feeling caused by sebum 3 hours after application”, the presence or absence of oily feeling caused by sebum was evaluated 3 hours after each water-in-oil emulsion cosmetic was applied to the skin and foundation was applied thereon.

[0276] [Evaluation criteria]

[0277] 5: Good

[0278] 4: Slightly good

[0279] 3: Normal

[0280] 2: Slightly bad

[0281] 1: Bad [Table 1]

[0282]

[0283] [Table 2]

[0284]

[0285] [Table 3]

[0286]

[0287] [Table 4]

[0288]

[0289] The details of the components used in Tables 1 to 4 are as follows:

[0290] *1: PARSOL 1789 manufactured by DSM

[0291] *2: "UVINUL A PLUS" manufactured by BASF

[0292] *3: BASF Corporation "UVINUL T-150"

[0293] *4: BASF Corporation "UVINUL M40"

[0294] *5: UFC CORPORATION "Mosacare A440"

[0295] *6: BASF Corporation's "TINOSORB S"

[0296] *7: Shin-Etsu Chemical Co., Ltd. "KF-96A-6cs"

[0297] *8: BASF Corporation "UVINUL MC80"

[0298] *9: SEPPIC "SEPIGEL 305" (polyacrylamide, active ingredient 40% by mass)

[0299] *10: "SIMULGEL EG" manufactured by SEPPIC ((sodium acryloyldimethyltaurate / sodium acrylic acid) copolymer, active ingredient 37.5% by mass)

[0300] *11: "SEPINOV EMT 10" manufactured by SEPPIC ((sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, active ingredient 89.3% by mass),

[0301] *12: Aristoflex AVC manufactured by Clariant ((ammonium acryloyldimethyltaurate / vinylpyrrolidone) copolymer, active ingredient 100% by mass)

[0302] *13: PEMULEN TR-1 manufactured by Lubrizol Advanced Materials

[0303] *14: Polydimethylsiloxane-treated zinc oxide microparticles C1 obtained in Preparation Example 1

[0304] *15: Methyl hydrogen polysiloxane treated zinc oxide microparticles C2 obtained in Preparation Example 2

[0305] *16: Triethoxycaprylylsilane-treated fine zinc oxide C3 obtained in Preparation Example 3

[0306] *17: Polydimethylsiloxane-treated titanium dioxide fine particles C4 obtained in Preparation Example 4

[0307] *18: “STR-100W-LP” manufactured by Sakai Chemical Industry Co., Ltd. (average primary particle size 10 nm)

[0308] *19: “STR-100W-OTS” manufactured by Sakai Chemical Industry Co., Ltd. (average primary particle size 10 nm)

[0309] *20: “Micro-Titanium Oxide MT-N1” manufactured by TAYCA Corporation (average primary particle size 7 nm)

[0310] *21: Dow Toray Co., Ltd. "DOWSIL AMS-C30 COSMETIC WAX" (alkyl-modified (C30) silicone)

[0311] As shown in Tables 1 to 4, the oil-in-water emulsified cosmetics of the examples of the present invention have excellent ultraviolet protection ability, excellent emulsification stability, less stickiness when applied, good makeup adhesion, and suppressed oily shine caused by sebum, compared with the oil-in-water emulsified cosmetics of the comparative examples.

Claims

1. An oil-in-water emulsified cosmetic, wherein: Contains the following components (A1), (A2), (B), (C) and (D): Component (A1): a water-insoluble organic UV absorber that is solid at 25°C, and is at least one selected from 4-tert-butyl-4'-methoxydibenzoylmethane, 2-(4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 2-hydroxy-4-methoxybenzophenone, drometrizole trisiloxane, and 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, Ingredient (A2): Liquid oil, Component (B): an acrylamide polymer, and at least one selected from polyacrylamide, (sodium acryloyldimethyltaurate / sodium acrylic acid) copolymer, (sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, and (ammonium acryloyldimethyltaurate / vinyl pyrrolidone) copolymer, Ingredient (C): hydrophobicized metal oxide particles, Ingredient (D): polyol, The mass ratio (C) / (A1+A2) of the content of the component (C) to the total content of the component (A1) and the component (A2) is 0.25 or more and 1.8 or less, As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic. The hydrophobic treatment of component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment, The content of the component (D) is 3 to 5% by mass in the total amount of the oil-in-water emulsified cosmetic.

2. The oil-in-water emulsified cosmetic according to claim 1, wherein It further contains a surfactant as a component (E).

3. The oil-in-water emulsified cosmetic according to claim 1, wherein It further contains a water-soluble polymer having a thickening effect other than the component (B) as a component (F).

4. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The mass ratio (A2) / (A1) of the content of the component (A2) to the content of the component (A1) in the total amount of the oil-in-water emulsified cosmetic is 1 to 20.

5. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The mass ratio (A2) / (A1) of the content of the component (A2) to the content of the component (A1) in the total amount of the oil-in-water emulsified cosmetic is 2 to 15.

6. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 0.7% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

7. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 0.3% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

8. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The mass ratio (C) / (A1+A2) of the content of the component (C) in the total amount of the oil-in-water emulsified cosmetic to the total content of the component (A1) and the component (A2) is 0.40 or more and 1.3 or less.

9. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The fine-particle metal oxide of the component (C) is one or more selected from fine-particle zinc oxide and fine-particle titanium oxide.

10. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The hydrophobic treatment of the component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment using one or more selected from methyl hydrogen polysiloxane and dimethylsiloxane / methyl hydrogen siloxane copolymer as a surface treatment agent.

11. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The average primary particle size of the component (C) is 1 nm or more and 800 nm or less.

12. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The average primary particle size of the component (C) is 5 nm or more and 100 nm or less.

13. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The content of the component (C) in the total amount of the oil-in-water emulsified cosmetic is 3% by mass or more and 30% by mass or less.

14. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The content of the component (C) in the total amount of the oil-in-water emulsified cosmetic is 7% by mass or more and 25% by mass or less.

15. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The content of the component (B) in the total amount of the oil-in-water emulsified cosmetic is 0.1% by mass or more and 3% by mass or less.

16. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein The content of the component (B) in the total amount of the oil-in-water emulsified cosmetic is 0.3% by mass or more and 2% by mass or less.

17. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein Component (D) is a polyol having 2 to 12 carbon atoms.

18. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein Component (D) is one or more selected from propylene glycol, dipropylene glycol, 1,3-butylene glycol, and glycerin.

19. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein Component (A2) contains one or more selected from ester oils and silicone oils.

20. The oil-in-water emulsified cosmetic according to any one of claims 1 to 3, wherein For sun protection purposes.

21. An oil-in-water emulsified cosmetic, wherein: For sunscreen purposes, and containing: the following ingredients (A1), (A2), (B), (C) and (D): Component (A1): a water-insoluble organic UV absorber that is solid at 25°C, and is at least one selected from 4-tert-butyl-4'-methoxydibenzoylmethane, 2-(4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 2-hydroxy-4-methoxybenzophenone, drometrizole trisiloxane, and 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, Ingredient (A2): Liquid oil, Component (B): at least one selected from homopolymers of acrylamide, copolymers containing structural units derived from acrylamide-based monomers, and salts thereof, wherein the acrylamide-based monomer is at least one selected from acrylamide and acryloyldimethyltaurate, and is at least one selected from polyacrylamide, (sodium acryloyldimethyltaurate / sodium acrylic acid) copolymer, (sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, and (ammonium acryloyldimethyltaurate / vinylpyrrolidone) copolymer, Component (C): at least one selected from hydrophobicized fine-particle zinc oxide and fine-particle titanium oxide having an average primary particle size of 1 nm to 800 nm, Ingredient (D): polyol, The mass ratio (C) / (A1+A2) of the content of the component (C) to the total content of the component (A1) and the component (A2) is 0.30 or more and 1.5 or less; As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic; The hydrophobic treatment of component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment; The content of the component (D) is 3% by mass or more and 5% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

22. An oil-in-water emulsified cosmetic, wherein: For sunscreen purposes, and containing: the following ingredients (A1), (A2), (B), (C) and (D): Component (A1): a water-insoluble organic UV absorber that is solid at 25°C, and is at least one selected from 4-tert-butyl-4'-methoxydibenzoylmethane, 2-(4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 2-hydroxy-4-methoxybenzophenone, drometrizole trisiloxane, and 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, Ingredient (A2): Liquid oil, Component (B): at least one selected from homopolymers of acrylamide, copolymers containing structural units derived from acrylamide-based monomers, and salts thereof, wherein the acrylamide-based monomer is at least one selected from acrylamide and acryloyldimethyltaurate, and is at least one selected from polyacrylamide, (sodium acryloyldimethyltaurate / sodium acrylic acid) copolymer, (sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, and (ammonium acryloyldimethyltaurate / vinylpyrrolidone) copolymer, Component (C): at least one selected from hydrophobicized fine-particle zinc oxide and fine-particle titanium oxide having an average primary particle size of 5 nm to 100 nm, Ingredient (D): polyol, The mass ratio (C) / (A1+A2) of the content of the component (C) to the total content of the component (A1) and the component (A2) is 0.40 or more and 1.3 or less; As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic; The hydrophobic treatment of component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment; The content of the component (D) is 3% by mass or more and 5% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

23. An oil-in-water emulsified cosmetic, wherein: For sunscreen purposes, and containing: the following ingredients (A1), (A2), (B), (C) and (D): Component (A1): a water-insoluble organic UV absorber that is solid at 25°C, and is at least one selected from 4-tert-butyl-4'-methoxydibenzoylmethane, 2-(4-diethylamino-2-hydroxybenzoyl) benzoic acid hexyl ester, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, 2-hydroxy-4-methoxybenzophenone, drometrizole trisiloxane, and 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, Ingredient (A2): Liquid oil, Component (B): at least one selected from homopolymers of acrylamide, copolymers containing structural units derived from acrylamide-based monomers, and salts thereof, wherein the acrylamide-based monomer is at least one selected from acrylamide and acryloyldimethyltaurate, and is at least one selected from polyacrylamide, (sodium acryloyldimethyltaurate / sodium acrylic acid) copolymer, (sodium acryloyldimethyltaurate / hydroxyethyl acrylate) copolymer, and (ammonium acryloyldimethyltaurate / vinylpyrrolidone) copolymer, Component (C): at least one selected from hydrophobicized fine-particle zinc oxide and fine-particle titanium oxide having an average primary particle size of 5 nm to 100 nm, Ingredient (D): polyol, The mass ratio (C) / (A1+A2) of the content of the component (C) to the total content of the component (A1) and the component (A2) is 0.40 or more and 1.3 or less; As component (A2), the total content of 2-ethylhexyl p-methoxycinnamate and octocrylene is 2% by mass or less in the total amount of the oil-in-water emulsified cosmetic; The hydrophobic treatment of component (C) is one or more selected from silicone treatment, alkylalkoxysilane treatment, and fatty acid treatment using one or more selected from methyl hydrogen polysiloxane and dimethylsiloxane / methyl hydrogen siloxane copolymer as a surface treatment agent; The content of the component (D) is 3% by mass or more and 5% by mass or less in the total amount of the oil-in-water emulsified cosmetic.

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