Water-in-oil type liquid emulsion cosmetic composition

Abstract

A W / O type liquid cosmetic composition comprising: (A) an oil-soluble UV absorber solid form at 25°C having a triazine or triazole skeleton, (B) at least one gelling agent selected from the group consisting of (B1) a dextrin fatty acid ester-based oil-soluble gelling agent, (B2) a urethane-based oil-soluble gelling agent, (B3) an amide-based oil-soluble gelling agent and (B4) an acrylic-based oil-soluble gelling agent, (C) a non-aromatic ester with at least one alkyl group having 7 to 10 carbon atoms, (D) at least one surfactant having an HLB value of 8 or lower selected from the group consisting of (D1) a polyglycerol fatty acid ester-based surfactant and (D2) a sorbitan saturated fatty acid ester-based surfactant.

Description

WATER-IN-OIL TYPE LIQUID EMULSION COSMETIC COMPOSITION

[0001] The present invention relates to a water-in-oil type liquid emulsion cosmetic composition (W / O type liquid cosmetic composition).

[0002] Compounds having triazine skeletons or triazole skeletons such as bisethylhexyloxyphenolmethoxyphenyltriazine (hereunder also referred to as "BEMT") can be suitably used as ultraviolet absorbers. For example, European Patent Application Publication No. 03590491 describes an oil-in-water emulsion cosmetic characterized by containing: (A) an ultraviolet ray absorbing agent containing (a1) a sulfonic acid group-containing water-soluble ultraviolet ray absorbing agent, (a2) bis-ethyloxyphenol methoxyphenyl triazine, (a3) diethylamino hydroxybenzoyl hexyl benzoate and (a4) ethylhexyl triazone; (B) a polar oil; (C) a higher alcohol; and (D) a non-ionic surfactant; wherein the total blended amount of the (a2) bis-ethyloxyphenol methoxyphenyl triazine, the (a3) diethylamino hydroxybenzoyl hexyl benzoate, the (a4) ethylhexyl triazone and the (B) polar oil is 45 mass% or lower.

[0003] Oil-in-water emulsified cosmetic compositions (O / W type cosmetic compositions), however, have low waterproofness, and their usage is limited due to the tendency of the cosmetics to come off by the effects of sweat and rain. The present inventors have also investigated the addition of compounds with a triazine skeleton or triazole skeleton such as BEMT to W / O type cosmetic compositions, and have found that compounds with triazine skeletons or triazole skeletons such as BEMT readily form crystals in the oil phase, this tendency being especially prominent with silicone oils or straight-chain alkanes that are widely used in cosmetic materials.

[0004] It is an object of the invention to provide a W / O type liquid cosmetic composition having the following characteristics 1) to 3). 1) Excellent stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton. 2) Excellent emulsion stability. 3) Light texture.

[0005] The present invention provides the following [1] to

[0015] . [1] A W / O type liquid cosmetic composition comprising: (A) an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton (an oil-soluble UV absorber which is in the solid state at 25°C and has a triazine or triazole skeleton), (B) at least one gelling agent selected from the group consisting of (B1) a dextrin fatty acid ester-based oil-soluble gelling agent, (B2) a urethane-based oil-soluble gelling agent, (B3) an amide-based oil-soluble gelling agent and (B4) an acrylic-based oil-soluble gelling agent, (C) a non-aromatic ester with at least one alkyl group having 7 to 10 carbon atoms, and (D) at least one surfactant having an HLB value of 8 or lower selected from the group consisting of (D1) a polyglycerol fatty acid ester-based surfactant and (D2) a sorbitan saturated fatty acid ester-based surfactant.

[0006] As used herein, the "(A) oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton" may be referred to simply as "component (A)", with the same reference convention being used for the other components.

[0007] Also as used herein, "7 to 10 carbon atoms" will be indicated by "C7 to C10", in which case an "alkyl group of 7 to 10 carbon atoms" will be referred to as a "C7 to C10 alkyl group". An "alkyl group" in the phrase "alkyl group of 7 to 10 carbon atoms" or "C7 to C10 alkyl group" may be straight-chain, branched or cyclic. The same convention applies for numbers of carbon atoms other than 7 to 10.

[0008] The W / O type liquid cosmetic composition has 1) excellent stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton, 2) excellent emulsion stability and 3) light texture. This effect is thought to be a synergistic effect of components (A) to (D).

[0009] Component (C) in the W / O type liquid cosmetic composition is a medium with excellent properties for dissolving or dispersing component (A). Component (D) is a surfactant with excellent properties for dissolving or dispersing component (A) in component (C), and component (D) is a medium with excellent properties for dissolving or dispersing component (A). Therefore, component (A) in the W / O type liquid cosmetic composition can dissolve or disperse in both component (C) and component (D). Component (B) is able to cause gelling of component (C). Gelling of component (C) can help retard aggregation of component (A). Thus, component (A) in the W / O type liquid cosmetic composition is thought to be stabilized via a thermodynamic process (stabilization by the medium and surfactant) and also via a kinetic process (gelling of the medium).

[0010] When the W / O type liquid cosmetic composition does not contain any of components (B) to (D), the feature of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton is insufficient. If the W / O type liquid cosmetic composition does not comprise component (B) but comprises a high polar oil instead, the feature of 3) light texture will tend to be heavier texture. The feature of 3) light texture also becomes a heavier texture if the W / O type liquid cosmetic composition is rod-shaped instead of liquid.

[0011] Because the W / O type liquid cosmetic composition is a W / O type, it has superior waterproofness compared to an O / W type cosmetic composition. The cosmetic is therefore expected to be less likely to come off even when exposed to sweat or rain.

[0012] Since the W / O type liquid cosmetic composition comprises component (A) it is able to absorb ultraviolet rays. Since component (A) is dissolved or dispersed in the W / O type liquid cosmetic composition, the UV protection performance is high.

[0013] [2] The cosmetic composition according to [1] , wherein component (B1) comprises a fatty acid ester of dextrin, the fatty acid having 6 to 24 carbon atoms.

[0014] [3] The cosmetic composition according to [1] or [2] , wherein component (C) comprises at least one compound represented by any one of formulas (I), (II) and (III).

[0015] (where R1and R2each independently represent an alkyl group and at least one of R1and R2is an alkyl group having 7 to 10 carbon atoms.)

[0016] (where R3and R4each independently represent an alkyl group and at least one of R3and R4is an alkyl group having 7 to 10 carbon atoms.)

[0017] (where R5and R6each independently represent an alkyl group, at least one of R5and R6is an alkyl group having 7 to 10 carbon atoms, and R7represents an alkylene group.)

[0018] [4] The cosmetic composition according to any one of [1] to [3] , wherein component (D1) comprises at least one surfactant selected from the group consisting of (D1-1) an ester of at least one hydroxy fatty acid polycondensate and a polyglycerol, (D1-2) an ester of a dimer of unsaturated fatty acids, at least one fatty acid and at least one polyglycerol and (D1-3) an ester of at least one dicarboxylic acid, at least one fatty acid and at least one polyglycerol.

[0019] [5] The cosmetic composition according to any one of [1] to [4] , wherein component (D2) comprises at least one surfactant selected from the group consisting of (D2-1) mono-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms, (D2-2) di-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms and (D2-3) sesqui-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms.

[0020] [6] The cosmetic composition according to any one of [1] to [5] , further comprising (E) an oil-soluble UV absorber having liquid form at 25°C, wherein the oil-soluble UV absorber comprises at least one of ethylhexyl salicylate, octyl methoxycinnamate, octocrylene and homosalate.

[0021] [7] The cosmetic composition according to any one of [1] to [6] , further comprising at least one of an organically modified clay mineral and a water-soluble UV absorber.

[0022] With [2] to [7] above, the features of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton, 2) emulsion stability and 3) light texture are even more excellent.

[0023] [8] The cosmetic composition according to any one of [1] to [7] , wherein component (A) comprises bis-ethylhexyloxyphenol methoxyphenyl triazine, component (B1) comprises at least one of a dextrin palmitate and a dextrin myristate, component (B2) comprises a copolymer of castor oil and isophorone diisocyanate, component (B3) comprises at least one of dibutyl lauroyl glutamide, dibutyl ethylhexanoyl glutamide and polyamide-8, component (B4) comprises poly C10-30 alkyl acrylate, component (C) comprises at least one of dicaprylyl carbonate, an ester of a caprylic acid or a capric acid and a coconut-derived alcohol and an ester of butyleneglycol and two fatty acids selected from the group consisting of caprylic acid and capric acid, component (D1) comprises at least one of polyglyceryl-6 polyricinoleate, polyglyceryl-3 polyricinoleate, 2-polyglyceryl-dipolyhydroxystearate, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate and diisostearoyl polyglyceryl-3 dimer dilinoleate and component (D2) comprises sorbitan sesquiisostearate.

[0024] With [8] above, the features of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton, 2) emulsion stability and 3) light texture are yet more excellent.

[0025] [9] The cosmetic composition according to any one of [1] to [8] , wherein the cosmetic composition comprises 0.1 to 3 mass % of component (A), based on the total amount of the composition.

[0026]

[0010] The cosmetic composition according to any one of [1] to [9] , wherein the cosmetic composition comprises 0.1 to 4 mass % of component (B), based on the total amount of the composition.

[0027]

[0011] The cosmetic composition according to any one of [1] to

[0010] , wherein the cosmetic composition comprises 5 to 35 mass % of component (C), based on the total amount of the composition.

[0028]

[0012] The cosmetic composition according to any one of [1] to

[0011] , wherein the cosmetic composition comprises 0.1 to 10 mass % of component (D), based on the total amount of the composition.

[0029]

[0013] The cosmetic composition according to any one of [1] to

[0012] , wherein the mass ratio of component (A) with respect to component (C) is 0.03 to 0.3.

[0030] With [9] to

[0013] above, the features of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton, 2) emulsion stability and 3) light texture are even more excellent.

[0031]

[0014] The cosmetic composition according to any one of [1] to

[0013] , wherein the cosmetic composition is in the form of at least one from among a foundation, a primer and a concealer.

[0032]

[0015] A cosmetic process for caring for and / or making-up keratinic materials, wherein the cosmetic process comprises the application onto keratinic materials, in particular onto skin, of the cosmetic composition according to any one of [1] to

[0014] .

[0033] The invention provides a W / O type liquid cosmetic composition having 1) excellent stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton, especially excellent stability of the oil-soluble UV absorber in the oil phase, 2) excellent emulsion stability, especially excellent stability of the water phase in the oil phase, and 3) light texture.

[0034] The feature of "1) excellent stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton" means that after the cosmetic composition has been stored for 1 month at both 25°C and 5°C, and the cosmetic composition is observed with a microscope at 200x magnification under polarized light, no or almost no shiny objects due to the UV absorber are visible at both 25°C and 5°C.

[0035] The phrase "2) excellent emulsion stability" means that after the cosmetic composition has been stored for 1 month at 50°C, there is no or virtually no visible impairment of the emulsified state, such as separation or sedimentation.

[0036] The term "3) light texture" means that when the cosmetic composition is applied onto skin it produces a light feel with satisfactory spreadability. For example, if a majority of users sense a light feel and satisfactory spreadability when the cosmetic composition has been applied onto skin, then the cosmetic composition may be judged to have the feature of "3) light texture".

[0037] The W / O type liquid cosmetic composition of the embodiment comprises (A) an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton.

[0038] The term "liquid" or "liquid state" in this case means a viscosity of 50 to 10,000 mPa∙s at 25°C, while "solid" or "solid state" means a viscosity of higher than 10,000 mPa∙s at 25°C. The viscosity of the W / O type liquid cosmetic composition at 25°C may be 500 to 9000 mPa∙s or 2000 to 5000 mPa∙s. The viscosity can be measured using a rotational viscometer (for example, Rheolab QC by Anton Paar,;spindle: CC-27; rotational speed: 200 rpm, ST-22-4V-40; rotational speed: 100 rpm, ST-24-2D / 2 V / 2 V-30; rotational speed: 50 rpm).

[0039] Component (A) may be one or more selected from the group consisting of (A1) an oil-soluble UV absorber solid at 25°C having a triazine skeleton and (A2) an oil-soluble UV absorber solid at 25°C having a triazole skeleton, and it may be component (A1), or component (A2), or both component (A1) and component (A2).

[0040] Triazine skeletons include a 1,2,3-triazine skeleton, a 1,2,4-triazine skeleton and a 1,3,5-triazine skeleton, and it may be a 1,3,5-triazine skeleton.

[0041] Component (A1) may be one or more selected from the group consisting of BEMT and ethylhexyl triazone (EHT), and it may be BEMT, for example. Component (A1) may be a single compound used alone, or two or more different compounds used in combination.

[0042] Triazole skeletons include a 1,2,3-triazole skeleton and a 1,2,4-triazole skeleton, and it may be a 1,2,3-triazole skeleton.

[0043] Component (A2) may be drometrizole trisiloxane (DTS). Component (A2) may be a single compound used alone, or two or more different compounds used in combination.

[0044] BEMT, EHT and DTS are transparent and have essentially no effect on skin tone. Therefore when the W / O type liquid cosmetic composition of the embodiment contains one or more selected from the group consisting of BEMT, EHT and DTS, the composition can be suitably used for persons of all shade ranges from light shades to dark shades.

[0045] The content of component (A) may be 0.1 to 3 mass%, 0.1 to 2.5 mass%, 0.1 to 2 mass%, 0.1 to 1.5 mass%, 0.1 to 1 mass%, 0.1 to 0.5 mass%, 0.5 to 3 mass%, 0.5 to 2.5 mass%, 0.5 to 2 mass%, 0.5 to 1.5 mass%, 0.5 to 1 mass%, 1 to 3 mass%, 1 to 2.5 mass%, 1 to 2 mass%, 1 to 1.5 mass%, 1.5 to 3 mass%, 1.5 to 2.5 mass%, 1.5 to 2 mass%, 2 to 3 mass%, 2 to 2.5 mass% or 2.5 to 3 mass%, based on the total amount of the cosmetic composition. If the content of component (A) is within these ranges the 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton is more excellent, and the ultraviolet absorption effect is yet more superior.

[0046] The W / O type liquid cosmetic composition of the embodiment comprises (B) at least one gelling agent selected from the group consisting of (B1) a dextrin fatty acid ester-based oil-soluble gelling agent, (B2) a urethane-based oil-soluble gelling agent, (B3) an amide-based oil-soluble gelling agent and (B4) an acrylic-based oil-soluble gelling agent. By gelling component (C) as described below, component (B) can help retard aggregation of component (A). Component (B) may be a single compound used alone, or two or more different compounds used in combination.

[0047] Component (B) may be at least one gelling agent selected from the group consisting of components (B1), (B2) and (B3), at least one gelling agent selected from the group consisting of components (B1), (B2) and (B4), at least one gelling agent selected from the group consisting of components (B1), (B3) and (B4), at least one gelling agent selected from the group consisting of components (B2), (B3) and (B4), at least one gelling agent selected from the group consisting of components (B1) and (B2), at least one gelling agent selected from the group consisting of components (B1) and (B3), at least one gelling agent selected from the group consisting of components (B1) and (B4), at least one gelling agent selected from the group consisting of components (B2) and (B3), at least one gelling agent selected from the group consisting of components (B2) and (B4), at least one gelling agent selected from the group consisting of components (B3) and (B4), or it may be component (B1), component (B2), component (B3) or component (B4).

[0048] Component (B1) is a reaction product of a fatty acid ester of dextrin and a fatty acid (a fatty acid ester of dextrin). Dextrin is a molecule obtained by polymerizing glucose by at least one type of glycoside bond selected from the group consisting of an α-1,4-glycoside bond and an α-1,6-glycoside bond. The mean polymerization degree of glucose in the dextrin may be 10 to 50, 10 to 20, 20 to 30, 30 to 40, or 40 to 50. The repeating units of glucose in the dextrin have three hydroxyl groups while the end units each have four hydroxyl groups, and any or all of these hydroxyl groups may react with the fatty acid to form the dextrin fatty acid ester.

[0049] The number of carbon atoms of the fatty acid forming component (B1) may be 6 to 24, or it may be 6 to 22, 6 to 20, 6 to 18, 6 to 16, 8 to 24, 8 to 22, 8 to 20, 8 to 18, 8 to 16, 12 to 24, 12 to 22, 12 to 20, 12 to 18, 12 to 16, 14 to 24, 14 to 22, 14 to 20, 14 to 18 or 14 to 16. These ranges can provide a superior feature of 3) light texture. The fatty acid may be a saturated fatty acid or an unsaturated fatty acid. Fatty acids include ethylhexanoic acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, isostearic acid, arachidic acid, arachidonic acid and behenic acid, and the fatty acids used may be one or more selected from the group consisting of ethylhexanoic acid, myristic acid and palmitic acid, or one or more selected from the group consisting of myristic acid and palmitic acid. The fatty acid forming a dextrin fatty acid ester may be a single type of fatty acid or two or more fatty acids.

[0050] The dextrin fatty acid ester may be one or more selected from the group consisting of dextrin palmitate, dextrin myristate and dextrin (palmitate / ethylhexanoate), or one or more selected from the group consisting of dextrin palmitate and dextrin myristate.

[0051] Component (B2) is polyurethane. Polyurethane is a polymer of a polyisocyanate and a polyol, where the polyisocyanate may be isophorone diisocyanate (IPDI), and the polyol may be a triglyceride, as the reaction product of a hydroxy fatty acid and glycerol. Ricinolic acid is an example of the hydroxy fatty acid.

[0052] Castor oil-derived triglycerides may be used as the triglycerides. Castor oil includes many triglycerides of three ricinolic acids and a glycerol.

[0053] The polyurethane may be (castor oil / IPDI) copolymer.

[0054] Component (B3) is a compound with an amide bond. Compounds with amide bonds may be one or more selected from the group consisting of polyamide-8, polyamide-3, dibutyl lauroyl glutamide and dibutyl ethylhexanoyl glutamide. Polyamide-8 is a copolymer of ethylenediamine, neopentyl glycol and the hydrogenated dimer dilinoleic acid with the terminal functional groups blocked with stearyl alcohol. Polyamide-3 is a copolymer of dilinoleic acid, ethylenediamine and polypropylene glycoldiamine with the functional groups at both ends blocked with PEG / PPG-32 / 10 aminopropyl methyl ether.

[0055] Component (B4) is a polymer of an ester of acrylic acid and an aliphatic alcohol. The number of carbon atoms of the aliphatic alcohol may be 10 to 30. The polymer may be an alkyl polyacrylate(C10-30), for example.

[0056] The content of component (B) may be 0.1 to 4 mass%, or it may be 0.1 to 3 mass%, 0.1 to 2 mass%, 0.1 to 1.5 mass%, 0.1 to 1 mass%, 0.1 to 0.5 mass%, 0.5 to 4 mass%, 0.5 to 3 mass%, 0.5 to 2 mass%, 0.5 to 1.5 mass%, 0.5 to 1 mass%, 1 to 4 mass%, 1 to 3 mass%, 1 to 2 mass%, 1 to 1.5 mass%, 1.5 to 4 mass%, 1.5 to 3 mass%, 1.5 to 2 mass%, 2 to 4 mass%, 2 to 3 mass%, 2.5 to 4 mass%, 2.5 to 3 mass% or 3 to 4 mass%, based on the total amount of the cosmetic composition. If the content of component (B) is within these ranges the 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton will be more excellent.

[0057] The W / O type liquid cosmetic composition of the embodiment comprises (C) a non-aromatic ester with at least one alkyl group having 7 to 10 carbon atoms. Component (C) can function as a solubilizing agent for component (A). Specifically, component (C) is a medium with excellent properties for dissolving or dispersing component (A). Component (C) may be a single compound used alone, or two or more different compounds in combination.

[0058] In component (C), the C7-10 alkyl group is directly bonded to an atom of the ester bond (the carbonyl carbon or oxygen atom).

[0059] The C7-10 alkyl group forming component (C) may be a C7-10 straight-chain alkyl group or a C7-10 branched alkyl group. The C7 alkyl group may be one or more selected from the group consisting of heptyl, 2-methylhexyl and 3-methylhexyl groups. The C8 alkyl group may be one or more selected from the group consisting of octyl, 2-methylheptyl, 3-methylheptyl and 2-ethylhexyl groups. The C9 alkyl group may be one or more selected from the group consisting of nonyl, 2-methyloctyl, 3-methyloctyl and 2-ethylheptyl groups. The C10 alkyl group may be one or more selected from the group consisting of decyl, 2-methylnonyl, 3-methylnonyl and 2-ethyloctyl groups.

[0060] Component (C) may be one or more selected from the group consisting of compounds represented by general formula (I), compounds represented by general formula (II) and compounds represented by general formula (III), or it may be one or more selected from the group consisting of compounds represented by general formula (I) and compounds represented by general formula (II), or it may be one or more selected from the group consisting of compounds represented by general formula (I) and compounds represented by general formula (III), or it may be one or more selected from the group consisting of compounds represented by general formula (II) and compounds represented by general formula (III), or it may be a compound represented by general formula (I), a compound represented by general formula (II) or a compound represented by general formula (III).

[0061] (where R1and R2each independently represent an alkyl group, and at least one of R1and R2is an alkyl group having 7 to 10 carbon atoms.)

[0062] (where R3and R4each independently represent an alkyl group, and at least one of R3and R4is an alkyl group having 7 to 10 carbon atoms.)

[0063] (where R5and R6each independently represent an alkyl group, at least one of R5and R6is an alkyl group having 7 to 10 carbon atoms, and R7represents an alkylene group.)

[0064] So long as the aforementioned conditions are satisfied, R1, R2, R3, R4, R5, R6and R7may each independently be a straight-chain alkyl group or a branched alkyl group.

[0065] So long as the aforementioned conditions are satisfied, R1, R5and R6may each independently be a C3-23 alkyl group, a C5-21 alkyl group, a C7-19 alkyl group, a C7-17 alkyl group, a C7-15 alkyl group, a C7-13 alkyl group, a C7-11 alkyl group, or an alkyl group selected from the group consisting of C7 alkyl and C9 alkyl groups.

[0066] So long as the aforementioned conditions are satisfied, R2, R3and R4may each independently be a C4-24 alkyl group, a C6-22 alkyl group, a C8-20 alkyl group, a C8-18 alkyl group, a C8-16 alkyl group, a C8-14 alkyl group, a C8-12 alkyl group, or an alkyl group selected from the group consisting of C8 alkyl and C10 alkyl groups.

[0067] R7may be a C2-12 alkylene group, a C2-8 alkylene group, a C2-6 alkylene group, a C2-4 alkylene group, a C3-12 alkylene group, a C3-8 alkylene group, a C3-6 alkylene group, a C3-4 alkylene group or a C4 alkylene group.

[0068] At least one of R1and R2is a C7-10 alkyl group, but both R1and R2may also be C7-10 alkyl groups. At least one of R3and R4is a C7-10 alkyl group, but both R3and R4may also be C7-10 alkyl groups. At least one of R5and R6is a C7-10 alkyl group, but both R5and R6may also be C7-10 alkyl groups. Such cases result in a superior feature of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton.

[0069] The C7-10 alkyl groups in R1to R6may be, specifically, the C7-10 alkyl groups mentioned above as examples of C7-10 alkyl groups for component (C).

[0070] A compound represented by general formula (I) may be a coco-caprylate / caprate.

[0071] A compound represented by general formula (II) may be one or more selected from the group consisting of dicaprylyl carbonate and diethylhexyl carbonate, or it may be dicaprylyl carbonate.

[0072] A compound represented by general formula (III) may be one or more selected from the group consisting of butyleneglycol dicaprylate / dicaprate and propyleneglycol dicaprylate, or it may be butyleneglycol dicaprylate / dicaprate.

[0073] The content of component (C) may be 5 to 35 mass%, or it may be 5 to 30 mass%, 5 to 25 mass%, 5 to 20 mass%, 5 to 15 mass%, 5 to 10 mass%, 10 to 35 mass%, 10 to 30 mass%, 10 to 25 mass%, 10 to 20 mass%, 10 to 15 mass%, 15 to 35 mass%, 15 to 30 mass%, 15 to 25 mass%, 15 to 20 mass%, 20 to 35 mass%, 20 to 30 mass%, 20 to 25 mass%, 25 to 35 mass%, 25 to 30 mass% or 30 to 35 mass%, based on the total amount of the cosmetic composition. A content of component (C) within these ranges will result in superior features of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton, 2) emulsion stability and 3) light texture.

[0074] The mass ratio of component (A) with respect to component (C) (component (A) / component (C)) may be 0.03 to 0.3, or it may be 0.03 to 0.2, 0.03 to 0.15, 0.03 to 0.1, 0.03 to 0.05, 0.07 to 0.3, 0.07 to 0.2, 0.07 to 0.15, 0.07 to 0.1, 0.1 to 0.3, 0.1 to 0.2, 0.1 to 0.15, 0.15 to 0.3, 0.15 to 0.2 or 0.2 to 0.3. If the component (A) / component (C) ratio is within these ranges the feature of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton will be more excellent.

[0075] The W / O type liquid cosmetic composition of the embodiment comprises (D) at least one surfactant having an HLB value of 8 or lower selected from the group consisting of (D1) a polyglycerol fatty acid ester-based surfactant and (D2) a sorbitan saturated fatty acid ester-based surfactant. Component (D) is a surfactant with excellent properties for dissolving or dispersing component (A) in component (C), and component (D) is a medium with excellent properties for dissolving or dispersing component (A). Component (D) may be a single compound used alone, or two or more different compounds in combination.

[0076] Component (D) may be component (D1) or component (D2), or both component (D1) and component (D2).

[0077] The HLB value of component (D) is 8 or lower, but it may be 1 to 8, 2 to 8, 3 to 8, 4 to 8, 1 to 7, 2 to 7, 3 to 7, 4 to 7, 1 to 6, 2 to 6, 3 to 6 or 4 to 6. If the HLB value of component (D) is within these ranges the 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton will be more excellent. The HLB values of component (D1) and component (D2) are in the same range as the HLB value of component (D).

[0078] For the purpose of the present specification, the HLB value is an index representing the ratio of the relative affinity of a surfactant with respect to both liquids in an oil-aqueous system, and the HLB value used for the purpose of the invention is based on the definition of Griffin, at 25°C. The Griffin HLB value is described in J. Soc. Cosm. Chem., 1954, 5:249-256.

[0079] Component (D1) is an ester of one polyglycerol with one or more fatty acids, or a compound having such an ester as a partial structure.

[0080] The fatty acid forming component (D1) may be a fatty acid of 8 to 24 carbon atoms, a fatty acid of 10 to 22 carbon atoms, a fatty acid of 12 to 20 carbon atoms, a fatty acid of 14 to 20 carbon atoms or a fatty acid of 16 to 20 carbon atoms. This will result in more excellent features of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton and 2) emulsion stability. The fatty acid may be a saturated fatty acid or an unsaturated fatty acid. Saturated fatty acids include palmitic acid, stearic acid, arachidic acid, behenic acid and isostearic acid, while unsaturated fatty acids include palmitoleic acid, oleic acid, linoleic acid, α-linolenic acid, γ-linolenic acid and arachidonic acid. Moreover, one or more hydrogens of the hydrocarbon groups of these saturated fatty acids and unsaturated fatty acids may be substituted with hydroxyl groups, for use as hydroxy fatty acids. Hydroxy fatty acids include hydroxystearic acid and ricinolic acid. The fatty acid composing component (D1) may be a single type of fatty acid or a combination of two or more different fatty acids.

[0081] The unsaturated fatty acids may also form multimers such as dimers. Unsaturated fatty acid dimers may be one or more selected from the group consisting of palmitoleic acid dimer, oleic acid dimer, linoleic acid dimer, α-linolenic acid dimer, γ-linolenic acid dimer and arachidonic acid dimer.

[0082] The hydroxy fatty acid may also form a polycondensate. A polycondensate of a hydroxy fatty acid may be one or more selected from the group consisting of polycondensate of hydroxystearic acid and polycondensate of ricinolic acid.

[0083] The mean polymerization degree for polyglycerol in component (D1) may be 2 to 12, 2 to 10, 2 to 8, 2 to 6, 3 to 12, 3 to 10, 3 to 8, 3 to 6, 4 to 12, 4 to 10, 4 to 8, 4 to 6, 5 to 12, 5 to 10, 5 to 8 or 5 to 6.

[0084] Component (D1) may be one or more selected from the group consisting of (D1-1) the reaction product of one polyglycerol and at least one polycondensate of hydroxy fatty acids (hereunder also referred to as "ester of at least one hydroxy fatty acid polycondensate and a polyglycerol"), (D1-2) the reaction product of at least one polyglycerol, at least one fatty acid and one unsaturated fatty acid dimer (hereunder also referred to as "ester of a dimer of unsaturated fatty acids, at least one fatty acid and at least one polyglycerol"), and (D1-3) the reaction product of at least one polyglycerol, at least one fatty acid and at least one dicarboxylic acid (hereunder also referred to as "ester of at least one dicarboxylic acid, at least one fatty acid and at least one polyglycerol"), or it may be component (D1-1), or component (D1-2) or component (D1-3). The "at least one fatty acid" of component (D1-2) do not form multimers such as dimers.

[0085] The (D1-1) ester of at least one hydroxy fatty acid polycondensate and a polyglycerol can be represented by the following general formula (IV).

[0086] (In the formula, R10is a group represented by general formula (V) below or a hydrogen atom, with at least one of the R10groups being a group represented by general formula (V). The letter n represents a number of 2 or greater.)

[0087] For example, n may be 2 to 12, 2 to 10, 2 to 8 or 2 to 6.

[0088] (In the formula, R11represents a divalent saturated or unsaturated hydrocarbon group as a hydroxy fatty acid residue, and m represents number of 1 or greater. The "*" symbol indicates a bonding site to an oxygen atom.)

[0089] The number of carbon atoms of R11may be 11 to 23, 15 to 21 or 15 to 19.

[0090] For example, m may be 1 to 12, 1 to 10, 1 to 8 or 1 to 6.

[0091] Component (D1-1) having the structure of general formula (IV) may be polyglyceryl-6 polyricinoleate, polyglyceryl-3 polyricinoleate, polyglyceryl-4 polyricinoleate, polyglyceryl-5 polyricinoleate, polyglyceryl-10 polyricinoleate, polyglyceryl-2 dipolyhydroxystearate, polyglyceryl-6 polyhydroxystearate, polyglyceryl-10 decahydroxystearate, polyglyceryl-10 heptahydroxystearate or polyglyceryl-10 pentahydroxystearate, or it may be one or more selected from the group consisting of polyglyceryl-6 polyricinoleate, polyglyceryl-3 polyricinoleate and polyglyceryl-2 dipolyhydroxystearate.

[0092] The (D1-2) ester of a dimer of unsaturated fatty acids, one or more fatty acids and at least one polyglycerol can be represented by the following general formula (VI), for example.

[0093] (In the formula, R12is a group represented by the following general formula (VII), and R13is a divalent hydrocarbon group as the residue of an unsaturated fatty acid dimer.)

[0094] The number of carbon atoms of R13may be 11 to 23, 15 to 21 or 15 to 19.

[0095] (In the formula, R14is a bonding site to a carbon atom, a group represented by the following general formula (VIII) or a hydrogen atom, with one of R14being a bonding site to a carbon atom, and at least one of R14being a group represented by general formula (VIII). The letter p represents a number of 2 or greater.)

[0096] For example, p may be 2 to 12, 2 to 10, 2 to 8 or 2 to 6.

[0097] (In the formula, R15represents a monovalent saturated or unsaturated hydrocarbon group as the residue of a fatty acid. The "*" symbol indicates a bonding site to an oxygen atom.)

[0098] The number of carbon atoms of R15may be 11 to 23, 15 to 21 or 15 to 19.

[0099] Component (D1-2) having the structure of general formula (VI) above may be diisostearoyl polyglyceryl-3 dimer dilinoleate.

[0100] The (D1-3) ester of at least one dicarboxylic acid, at least one fatty acid and at least one polyglycerol can be represented by the following general formula (IX), for example.

[0101] (In the formula, R16is a group represented by the following general formula (X), R17is a divalent hydrocarbon group as a dicarboxylic acid residue, and R18is a group represented by general formula (XI), a group represented by general formula (XII) or a hydrogen atom. The letter q represents a number of 2 or greater, and r represents a number of one or greater.)

[0102] The dicarboxylic acid may be a dicarboxylic acid of 4 to 16 carbon atoms, a dicarboxylic acid of 6 to 14 carbon atoms or a dicarboxylic acid of 8 to 12 carbon atoms. The dicarboxylic acid may also be a saturated dicarboxylic acid. The dicarboxylic acid may be succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid or sebacic acid, such as sebacic acid. The term "dicarboxylic acid residue" means a group obtained by removing two carboxy groups from a dicarboxylic acid.

[0103] For example, q may be 2 to 8, 2 to 6, 2 to 4 or 2 to 3.

[0104] The letter "r" may be 1 to 8, 2 to 8, 2 to 6, 2 to 4 or 2 to 3.

[0105] (In the formula, R19is a group represented by general formula (XI), a group represented by general formula (XII) or a hydrogen atom, with at least one of the R19groups being a group represented by general formula (XI) or a group represented by general formula (XII). The "*" symbol indicates a bonding site to a group represented by R18or a carbon atom. The letter s represents an integer of 2 or greater.)

[0106] For example, s may be 2 to 12, 2 to 10, 2 to 8 or 2 to 6.

[0107] (In the formula, R20represents a monovalent saturated or unsaturated hydrocarbon group as the residue of a fatty acid. The "*" symbol indicates a bonding site to an oxygen atom.)

[0108] The number of carbon atoms of R20may be 11 to 23, 15 to 21 or 15 to 19.

[0109] (In the formula, R21represents a divalent saturated or unsaturated hydrocarbon group as a hydroxy fatty acid residue, and t represents number of 1 or greater. The "*" symbol indicates a bonding site to an oxygen atom.)

[0110] The number of carbon atoms of R21may be 11 to 23, 15 to 21 or 15 to 19.

[0111] For example, t may be 1 to 12, 1 to 10, 1 to 8 or 1 to 6.

[0112] Component (D1-3) having the structure of general formula (IX) above may be polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate.

[0113] Component (D2) is the reaction product of a sorbitan and at least one saturated fatty acid (a sorbitan saturated fatty acid ester). Sorbitan has four fatty acid-reactive hydroxyl groups per molecule, with 1, 2, 3 or 4 of the four hydroxyl groups potentially reacting with a fatty acid to form a sorbitan fatty acid ester. For example, reaction products of saturated fatty acids with one of the four hydroxyl groups of sorbitan are referred to as "mono-saturated fatty acid esters of sorbitan", reaction products of saturated fatty acids with two hydroxyl groups are referred to as "di-saturated fatty acid esters of sorbitan", and mixtures of the former and latter products, which are the reaction products of sorbitan and an average of 1.5 saturated fatty acids are referred to as "sesqui-saturated fatty acid esters of sorbitan".

[0114] Sorbitans composing component (D2) include 1,4-sorbitans having a tetrahydrofuran skeleton and 1,5-sorbitans having a tetrahydropyran skeleton, and the sorbitan saturated fatty acid ester of component (D2) may comprise any of these skeletons, or it may be a combination of compounds having such skeletons.

[0115] The saturated fatty acid forming component (D2) may be a saturated fatty acid of 12 to 24, 16 to 22 or 16 to 20 carbon atoms. Examples of such saturated fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid and isostearic acid, such as isostearic acid.

[0116] Component (D2) may include one or more selected from the group consisting of mono-saturated fatty acid esters of sorbitan, sesqui-saturated fatty acid esters of sorbitan and di-saturated fatty acid esters of sorbitan, and it may include a sesqui-saturated fatty acid ester of sorbitan, for example. Component (D2) may be one or more selected from the group consisting of (D2-1) mono-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms, (D2-2) di-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms and (D2-3) sesqui-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms, and it may be (D2-3) a sesqui-saturated fatty acid ester of sorbitan where the fatty acid has 16 to 20 carbon atoms. for example. When component (D2) includes such sorbitan saturated fatty acid esters, it exhibits superior features of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton and 2) emulsion stability.

[0117] Component (D2) may be a sesqui-saturated fatty acid ester of sorbitan such as sorbitan sesquiisostearate, or a mono-saturated fatty acid ester of sorbitan such as sorbitan palmitate or sorbitan stearate, and it may be sorbitan sesquiisostearate, for example.

[0118] The content of component (D) may be 0.1 to 10 mass%, such as 0.1 to 10 mass%, 0.5 to 10 mass%, 1 to 10 mass%, 1.5 to 10 mass%, 2 to 10 mass%, 2.5 to 10 mass%, 0.1 to 8 mass%, 0.5 to 8 mass%, 1 to 8 mass%, 1.5 to 8 mass%, 2 to 8 mass%, 2.5 to 8 mass%, 0.1 to 6 mass%, 0.5 to 6 mass%, 1 to 6 mass%, 1.5 to 6 mass%, 2 to 6 mass%, 2.5 to 6 mass%, 0.1 to 4 mass%, 0.5 to 4 mass%, 1 to 4 mass%, 1.5 to 4 mass%, 2 to 4 mass%, 2.5 to 4 mass%, 0.1 to 3.5 mass%, 0.5 to 3.5 mass%, 1 to 3.5 mass%, 1.5 to 3.5 mass%, 2 to 3.5 mass% or 2.5 to 3.5 mass%, based on the total amount of the cosmetic composition. A content of component (D) within these ranges will result in superior features of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton and 2) emulsion stability.

[0119] The W / O type liquid cosmetic composition of the embodiment may further comprise (E) an oil-soluble organic UV absorber having liquid form at 25°C. This will further improve the ultraviolet absorption effect of the W / O type liquid cosmetic composition of the embodiment.

[0120] Component (E) may be one or more selected from the group consisting of ethylhexyl salicylate, octyl methoxycinnamate, homosalate and octocrylene, and it may be ethylhexyl salicylate, for example. Such cases result in a superior feature of 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton.

[0121] The content of component (E) may be 0.5 to 10 mass%, such as 0.5 to 8 mass%, 0.5 to 6 mass%, 0.5 to 5 mass%, 0.5 to 4 mass%, 0.5 to 3 mass%, 0.5 to 2 mass%, 0.5 to 1 mass%, 1 to 10 mass%, 1 to 8 mass%, 1 to 6 mass%, 1 to 5 mass%, 1 to 4 mass%, 1 to 3 mass%, 1 to 2 mass%, 1.5 to 10 mass%, 1.5 to 8 mass%, 1.5 to 6 mass%, 1.5 to 5 mass%, 1.5 to 4 mass%, 1.5 to 3 mass%, 1.5 to 2 mass%, 2 to 10 mass%, 2 to 8 mass%, 2 to 6 mass%, 2 to 5 mass%, 2 to 4 mass%, 2 to 3 mass%, 3 to 10 mass%, 3 to 8 mass%, 3 to 6 mass%, 3 to 5 mass%, 3 to 4 mass%, 4 to 10 mass%, 4 to 8 mass%, 4 to 6 mass% or 4 to 5 mass%, based on the total amount of the cosmetic composition. If the content of component (E) is within these ranges the 1) stability as an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton and the ultraviolet absorption effect will be even more excellent.

[0122] The W / O type liquid cosmetic composition of the embodiment may also comprise an organically modified clay mineral. This will provide more excellent features of 2) emulsion stability and 3) light texture.

[0123] The organically modified clay mineral may be one or more selected from the group consisting of stearalkonium hectorite and stearalkonium bentonite, and it may be stearalkonium hectorite. The W / O type liquid cosmetic composition of the embodiment may also comprise stearalkonium hectorite by comprising a mixture of stearalkonium hectorite, caprylic acid / capric acid triglycerides and propylene carbonate.

[0124] The content of the organically modified clay mineral may be 0.05 to 1.5 mass%, such as 0.05 to 1 mass%, 0.05 to 0.8 mass%, 0.05 to 0.6 mass%, 0.05 to 0.4 mass%, 0.05 to 0.2 mass%, 0.05 to 0.1 mass%, 0.1 to 1.5 mass%, 0.1 to 1 mass%, 0.1 to 0.8 mass%, 0.1 to 0.6 mass%, 0.1 to 0.4 mass%, 0.1 to 0.2 mass%, 0.2 to 1.5 mass%, 0.2 to 1 mass%, 0.2 to 0.8 mass%, 0.2 to 0.6 mass%, 0.2 to 0.4 mass%, 0.3 to 1.5 mass%, 0.3 to 1 mass%, 0.3 to 0.8 mass%, 0.3 to 0.6 mass%, 0.3 to 0.4 mass%, 0.4 to 1.5 mass%, 0.4 to 1 mass%, 0.4 to 0.8 mass%, 0.4 to 0.6 mass%, 0.6 to 1.5 mass%, 0.6 to 1 mass%, 0.6 to 0.8 mass%, 0.8 to 1.5 mass%, 0.8 to 1 mass% or 1 to 1.5 mass%, based on the total amount of the cosmetic composition. If the content of the organically modified clay mineral is within these ranges the features of 2) emulsion stability and 3) light texture will be even more excellent.

[0125] The W / O type liquid cosmetic composition of the embodiment may also comprise a silicone-based surfactant.

[0126] The silicone-based surfactant may be a polyether-modified silicone such as cetyl PEG / PPG-10 / 1 dimethicone, PEG / PPG-20 / 22 butyl ether dimethicone, PEG-3 dimethicone, PEG-9 methyl ether dimethicone, PEG-10 dimethicone, PEG-9 polymethylsiloxyethyldimethicone, lauryl PEG-9 polymethylsiloxyethyldimethicone or cetyl PEG / PPG-10 / 1 dimethicone; or a polyglycerol-modified silicone such as polyglyceryl-3 polydimethylsiloxyethyldimethicone or laurylpolyglyceryl-3 polydimethylsiloxyethyldimethicone, and for example it may be a polyether-modified silicone, such as cetyl PEG / PPG-10 / 1dimethicone.

[0127] The content of the silicone-based surfactant may be 0.3 to 4 mass%, such as 0.3 to 3 mass%, 0.3 to 2 mass%, 0.3 to 1.5 mass%, 0.3 to 1 mass%, 0.3 to 0.5 mass%, 0.5 to 4 mass%, 0.5 to 3 mass%, 0.5 to 2 mass%, 0.5 to 1.5 mass%, 0.5 to 1 mass%, 1 to 4 mass%, 1 to 3 mass%, 1 to 2 mass%, 1 to 1.5 mass%, 1.5 to 4 mass%, 1.5 to 3 mass%, 1.5 to 2 mass%, 2 to 4 mass%, 2 to 3 mass% or 3 to 4 mass%, based on the total amount of the cosmetic composition.

[0128] The W / O type liquid cosmetic composition of the embodiment may have components (A) to (E), the organically modified clay mineral and the silicone-based surfactant in an oil phase. The oil phase of the W / O type liquid cosmetic composition of the embodiment may also contain other components such as an oil-soluble humectant, pearlescent agent or functional powder, as suited for the purpose.

[0129] The W / O type liquid cosmetic composition of the embodiment may also contain an aqueous medium.

[0130] An aqueous medium may be one or more selected from the group consisting of water, and monools, and it may be water, for example. Monools include ethanol, 1-propanol and 2-propanol (isopropanol).

[0131] The content of the aqueous medium may be 20 to 80 mass%, such as 30 to 80 mass%, 40 to 80 mass%, 20 to 70 mass%, 30 to 70 mass%, 40 to 70 mass%, 20 to 60 mass%, 30 to 60 mass% or 40 to 60 mass%, based on the total amount of the cosmetic composition.

[0132] The W / O type liquid cosmetic composition of the embodiment may also contain (a) a water-soluble UV absorber. This will further improve the ultraviolet absorption effect of the W / O type liquid cosmetic composition of the embodiment.

[0133] Component (a) may be one or more selected from the group consisting of benzophenone-based ultraviolet absorbers, benzylidene camphor-based ultraviolet absorbers and phenylbenzimidazole-based ultraviolet absorbers, and it may be a phenylbenzimidazole-based ultraviolet absorber, for example. Benzophenone-based ultraviolet absorbers include 2-hydroxy-4-methoxybenzophenone-5-sulfonate, for example. Benzylidene camphor-based ultraviolet absorbers include benzylidene camphor sulfonic acid and terephthalylidene di camphor sulfonic acid. Phenylbenzimidazole-based ultraviolet absorbers include phenylbenzimidazolesulfonic acid, for example.

[0134] The content of component (a) may be 0.5 to 3 mass%, such as 0.5 to 2.7 mass%, 0.5 to 2.5 mass%, 0.5 to 2 mass%, 0.5 to 1.5 mass%, 0.5 to 1 mass%, 1 to 3 mass%, 1 to 2.7 mass%, 1 to 2.5 mass%, 1 to 2 mass%, 1 to 1.5 mass%, 1.5 to 3 mass%, 1.5 to 2.7 mass%, 1.5 to 2.5 mass%, 1.5 to 2 mass%, 2 to 3 mass%, 2 to 2.7 mass%, 2 to 2.5 mass%, 2.5 to 3 mass%, 2.5 to 2.7 mass% or 2.7 to 3 mass%, based on the total amount of the cosmetic composition.

[0135] The W / O type liquid cosmetic composition of the embodiment may also contain (b) a neutralizer.

[0136] Component (b) may be one or more selected from the group consisting of sodium hydroxide, potassium hydroxide, triethanolamine, tromethamine, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl-1,3-propanediol and arginine, and it may be arginine, for example.

[0137] The content of component (b) may be 0.1 to 3 mass%, such as 0.1 to 2.5 mass%, 0.1 to 2 mass%, 0.1 to 1.5 mass%, 0.1 to 1 mass%, 0.1 to 0.5 mass%, 0.5 to 3 mass%, 0.5 to 2.5 mass%, 0.5 to 2 mass%, 0.5 to 1.5 mass%, 0.5 to 1 mass%, 1 to 3 mass%, 1 to 2.5 mass%, 1 to 2 mass%, 1 to 1.5 mass%, 1.5 to 3 mass%, 1.5 to 2.5 mass%, 1.5 to 2 mass%, 2 to 3 mass%, 2 to 2.5 mass% or 2.5 to 3 mass%, based on the total amount of the cosmetic composition.

[0138] The W / O type liquid cosmetic composition of the embodiment may also contain (c) a water-soluble preservative.

[0139] Component (c) may be one or more selected from the group consisting of chlorphenesin, hydroxyacetophenone, sorbic acid and its salts, sodium dehydroacetate, benzoic acid and its salts, pyrosulfites, phenylpropanol and phenethyl alcohol, and for example, it may be one or more selected from the group consisting of chlorphenesin and hydroxyacetophenone.

[0140] The content of component (c) may be 0.1 to 0.5 mass%, such as 0.1 to 0.4 mass%, 0.1 to 0.3 mass%, 0.1 to 0.2 mass%, 0.2 to 0.5 mass%, 0.2 to 0.4 mass%, 0.2 to 0.3 mass%, 0.3 to 0.5 mass%, 0.3 to 0.4 mass% or 0.4 to 0.5 mass%, based on the total amount of the cosmetic composition.

[0141] The W / O type liquid cosmetic composition of the embodiment may have the aqueous medium and components (a) to (c) in an aqueous phase. The aqueous phase of the W / O type liquid cosmetic composition of the embodiment may also contain other components such as a water-soluble humectant or water-soluble stabilizer, as suited for the purpose. Humectants include polyhydric alcohols such as butylene glycol and glycerol. Water-soluble stabilizers include salts such as sodium chloride and magnesium sulfate.

[0142] The W / O type liquid cosmetic composition of the embodiment may also contain a pigment.

[0143] A pigment may be one or more selected from the group consisting of inorganic pigments and organic pigments, and it may be an inorganic pigment, for example. Inorganic pigments include titanium dioxide, iron oxide, zinc oxide, cerium oxide, aluminum oxide, bengala, Prussian blue, chromium oxide and chromium hydroxide, such as iron oxide. Iron oxide may be red iron oxide, yellow iron oxide or black iron oxide. Organic pigments include D&C Red No.7 and D&C Red No.6.

[0144] The pigment content may be 0.0001 to 20.0 mass%, such as 0.0001 to 15.0 mass%, 0.0001 to 10.0 mass%, 0.0001 to 5.0 mass%, 0.0001 to 1.0 mass%, 0.0001 to 0.1 mass%, 0.0001 to 0.01 mass%, 0.0001 to 0.001 mass%, 0.0001 to 0.0005 mass%, 0.001 to 20.0 mass%, 0.001 to 15.0 mass%, 0.001 to 10.0 mass%, 0.001 to 5.0 mass%, 0.001 to 1.0 mass%, 0.001 to 0.1 mass%, 0.001 to 0.01 mass%, 0.01 to 20.0 mass%, 0.01 to 15.0 mass%, 0.01 to 10.0 mass%, 0.01 to 5.0 mass%, 0.01 to 1.0 mass%, 0.01 to 0.1 mass%, 0.1 to 20.0 mass%,0.1 to 15.0 mass%, 0.1 to 10.0 mass%, 0.1 to 5.0 mass%, 0.1 to 1.0 mass%, 1.0 to 20.0 mass%, 1.0 to 15.0 mass%, 1.0 to 10.0 mass%, 1.0 to 5.0 mass%, based on the total amount of the cosmetic composition.

[0145] The W / O type liquid cosmetic composition of the embodiment can be produced by the following steps, as an example. (1) The aqueous components are stirred at 20 to 80°C using a homogenizer to prepare an aqueous phase mixture. (2) Component (A) to (D) and the other oil components are stirred at 20 to 130°C using a homogenizer to prepare an oil phase mixture. (3) The aqueous phase mixture obtained in (1) is added to the oil phase mixture obtained in (2) and the pigment phase and a homogenizer is used for stirring to prepare a W / O type liquid cosmetic composition.

[0146] The W / O type liquid cosmetic composition of the embodiment can be suitably used as a skin cosmetic, for example, and is preferably used by application onto skin (excluding the scalp), and more preferably onto the face, body and limbs. The W / O type liquid cosmetic composition of the embodiment can be used as one or more selected from the group consisting of a foundation, a primer and a concealer, and it may be used as a primer, for example.

[0147] The W / O type liquid cosmetic composition of the embodiment can be used in a cosmetic process for caring for and / or making-up keratinic materials, wherein the cosmetic process comprises the application onto keratinic materials, in particular onto skin, of the cosmetic composition.

[0148] The present invention will now be explained by the following Examples, with the understanding that the invention is not limited by the Examples.

[0149] (Preparation of W / O type cosmetic composition) W / O type liquid cosmetic compositions for Examples 1 to 12 and Comparative Examples 1 to 5 and a W / O type rod-shaped cosmetic composition for Comparative Example 6 were prepared with the compositions listed in Tables 1 and 2, according to steps 1 to 3 described below. Examples 1 to 11 and Examples 1 to 6 are primers, and Example 12 is a foundation. The units for the contents of each of the materials in Tables 1 and 2 are given in mass%. Table 3 shows the details for each of the components of Table 1 and 2. Step 1: The aqueous components are stirred at 20 to 80°C using a homogenizer to prepare an aqueous phase mixture. Step 2: Components (A) to (D) and the other oil components are stirred at 20 to 130°C using a homogenizer to prepare an oil phase mixture. Step 3: The aqueous phase mixture obtained in step 1 is added to the oil phase mixture obtained in step 2 and a pigment phase and a homogenizer is used for stirring to prepare a W / O type liquid cosmetic composition or a W / O type rod-shaped cosmetic composition.

[0150] (Evaluation scale for BEMT stability) Each of the prepared W / O type cosmetic compositions of the Examples and Comparative Examples was filled into a transparent container and sealed with a cap and then stored for 1 month at 25°C and 5°C. A small amount of each stored W / O type cosmetic composition was placed on a glass plate, layered with preparation and observed under polarized light using a digital microscope (HIROX, 200x magnification). Since BEMT present as crystals in a W / O type cosmetic composition causes shiny objects to be observed under polarized light, the presence or absence of shiny objects was evaluated as the index, on the following scale. <Evaluation scale for BEMT stability> a: No shiny objects observed at 25°C and 5°C. f: Shiny objects observed at 25°C or 5°C.

[0151] (Evaluation of emulsion stability) Each of the prepared W / O type liquid cosmetic compositions of the Examples and Comparative Examples was filled into a transparent container and sealed with a cap and then stored for 1 month at 50°C. As a control there was used a W / O type cosmetic composition stored for 1 month at room temperature in a transparent container. The outer appearance of the stored W / O type cosmetic composition was visually examined, compared with the control and evaluated on the following scale. <Evaluation scale for emulsion stability> a: No deterioration such as separation or settling of emulsified state observed. f: Deterioration such as separation or settling of emulsified state observed.

[0152] (Evaluation of light texture) The light texture was evaluated on the following scale, after coating the W / O type cosmetic composition of the Examples and Comparative Examples onto skin by an evaluation panel of 10 cosmetic experts (ages 25 to 55) of an organization to which the present inventors belong. <Evaluation scale for light texture> A:Very excellent (e.g.: 9-10 out of 10 evaluators perceived a light sensation and satisfactory spread.) B: Excellent (e.g.: 7-8 out of 10 evaluators perceived a light sensation and satisfactory spread.) C: Fairly good (e.g.: 5-6 out of 10 evaluators perceived a light sensation and satisfactory spread.) D: Fairly poor (e.g.: 3-4 out of 10 evaluators perceived a light sensation and satisfactory spread.) E: Poor (e.g.: 1-2 out of 10 evaluators perceived a light sensation and satisfactory spread.) F: Very poor (e.g.: None of the evaluators perceived a light sensation and satisfactory spread.)

[0153] The results are summarized in Tables 1 and 2 below.

[0154] For the purpose of the present specification, the cosmetic compositions with an evaluation of "a" for stability of component (A) are judged to have excellent stability for component (A). The cosmetic compositions with an evaluation of "a" for emulsion stability are judged to have excellent emulsion stability. The cosmetic compositions with evaluations of A to C for light texture are judged to have light texture. In other words, cosmetic compositions having evaluations of "a" or A to C for all three evaluations, are judged to be acceptable according to the present invention. Compositions having evaluations of "f" or D to F for one or more of the three evaluations are judged to be unacceptable according to the present invention.

[0155]

[0156]

[0157]

Claims

1. A W / O type liquid cosmetic composition comprising: (A) an oil-soluble UV absorber solid at 25°C having a triazine or triazole skeleton, (B) at least one gelling agent selected from the group consisting of (B1) a dextrin fatty acid ester-based oil-soluble gelling agent, (B2) a urethane-based oil-soluble gelling agent, (B3) an amide-based oil-soluble gelling agent and (B4) an acrylic-based oil-soluble gelling agent, (C) a non-aromatic ester with at least one alkyl group having 7 to 10 carbon atoms, and (D) at least one surfactant having an HLB value of 8 or lower selected from the group consisting of (D1) a polyglycerol fatty acid ester-based surfactant and (D2) a sorbitan saturated fatty acid ester-based surfactant.

2. The cosmetic composition according to claim 1, wherein component (B1) comprises a fatty acid ester of dextrin, the fatty acid having 6 to 24 carbon atoms.

3. The cosmetic composition according to claim 1 or 2, wherein component (C) comprises at least one compound represented by any one of formulas (I), (II) and (III). (where R1and R2each independently represent an alkyl group and at least one of R1and R2is an alkyl group having 7 to 10 carbon atoms.) (where R3and R4each independently represent an alkyl group and at least one of R3and R4is an alkyl group having 7 to 10 carbon atoms.) (where R5and R6each independently represent an alkyl group, at least one of R5and R6is an alkyl group having 7 to 10 carbon atoms, and R7represents an alkylene group.)4. The cosmetic composition according to any one of claims 1 to 3, wherein component (D1) comprises at least one surfactant selected from the group consisting of (D1-1) an ester of at least one hydroxy fatty acid polycondensate and a polyglycerol, (D1-2) an ester of a dimer of unsaturated fatty acids, at least one fatty acid and at least one polyglycerol and (D1-3) an ester of at least one dicarboxylic acid, at least one fatty acid and at least one polyglycerol.

5. The cosmetic composition according to any one of claims 1 to 4, wherein component (D2) comprises at least one surfactant selected from the group consisting of (D2-1) mono-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms, (D2-2) di-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms and (D2-3) sesqui-saturated fatty acid esters of sorbitan where the fatty acid has 16 to 20 carbon atoms.

6. The cosmetic composition according to any one of claims 1 to 5, further comprising (E) an oil-soluble UV absorber having liquid form at 25°C, wherein the oil-soluble UV absorber comprises at least one of ethylhexyl salicylate, octyl methoxycinnamate, octocrylene and homosalate.

7. The cosmetic composition according to any one of claims 1 to 6, further comprising at least one of an organically modified clay mineral and a water-soluble UV absorber.

8. The cosmetic composition according to any one of claims 1 to 7, wherein component (A) comprises bis-ethylhexyloxyphenol methoxyphenyl triazine, component (B1) comprises at least one of a dextrin palmitate and a dextrin myristate, component (B2) comprises a copolymer of castor oil and isophorone diisocyanate, component (B3) comprises at least one of dibutyl lauroyl glutamide, dibutyl ethylhexanoyl glutamide and polyamide-8, component (B4) comprises poly C10-30 alkyl acrylate, component (C) comprises at least one of dicaprylyl carbonate, an ester of a caprylic acid or a capric acid and a coconut-derived alcohol and an ester of a butyleneglycol and two fatty acids selected from the group consisting of caprylic acid and capric acid, component (D1) comprises at least one of polyglyceryl-6 polyricinoleate, polyglyceryl-3 polyricinoleate, 2-polyglyceryl-dipolyhydroxystearate, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate and diisostearoyl polyglyceryl-3 dimer dilinoleate, and component (D2) comprises sorbitan sesquiisostearate.

9. The cosmetic composition according to any one of claims 1 to 8, wherein the cosmetic composition comprises 0.1 to 3 mass % of component (A), based on the total amount of the composition.

10. The cosmetic composition according to any one of claims 1 to 9, wherein the cosmetic composition comprises 0.1 to 4 mass % of component (B), based on the total amount of the composition.

11. The cosmetic composition according to any one of claims 1 to 10, wherein the cosmetic composition comprises 5 to 35 mass % of component (C), based on the total amount of the composition.

12. The cosmetic composition according to any one of claims 1 to 11, wherein the cosmetic composition comprises 0.1 to 10 mass % of component (D), based on the total amount of the composition.

13. The cosmetic composition according to any one of claims 1 to 12, wherein the mass ratio of component (A) with respect to component (C) is 0.03 to 0.3.

14. The cosmetic composition according to any one of claims 1 to 13, wherein the cosmetic composition is in the form of at least one of a foundation, a primer and a concealer.

15. A cosmetic process for caring for and / or making-up keratinic materials, wherein the cosmetic process comprises the application onto keratinic materials, in particular onto skin, of the cosmetic composition according to any one of claims 1 to 14.

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