Oil-in-water emulsion composition

Abstract

[Problem] To provide an oil-in-water emulsion composition that has excellent emulsion stability even when polymer-emulsified and has a more moist feel during use. [Solution] An oil-in-water emulsion composition comprising (A) a (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester copolymer, (B) batyl alcohol, and (C) a polar oil in an amount of 10% by mass or more based on the total amount of the composition.

Description

Technical Field

[0001] The present invention relates to an oil-in-water emulsion composition. Background Art

[0002] Generally, oil-in-water emulsified cosmetics have a high sun protection effect and excellent stability because an ultraviolet absorber is incorporated in the oil phase. However, most oil-in-water emulsified cosmetics are difficult to simply wash off with ordinary detergents or soaps, and in addition, since they contain a large amount of ultraviolet absorbers, there are sometimes problems in the feeling of use such as a dry feeling. On the other hand, oil-in-water emulsified cosmetics have the advantages of being easily washable and having less dryness.

[0003] For example, in Patent Document 1, there is described an oil-in-water emulsified cosmetic that has a unique smooth feeling in use by incorporating a copolymer of (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: International Publication No. 2018 / 221606 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] Generally, in a so-called polymer emulsion system in which a polymer is used as an emulsifier, it is difficult to stably incorporate an anti-ultraviolet agent. In the cosmetic described in Patent Document 1, a higher alcohol, a nonionic surfactant, and water form an association having a lamellar liquid crystal structure (also referred to as an “α gel”), thereby stably incorporating the anti-ultraviolet agent. However, while further improving the emulsion stability, a more moist feeling in use is desired.

[0009] The present invention has been made in view of the above circumstances, and an object thereof is to provide an oil-in-water emulsion composition that has excellent emulsion stability even when polymer-emulsified and has a more moist feeling in use.

[0010] Means for Solving the Problems

[0011] The oil-in-water emulsion composition of the present invention contains:

[0012] (A) A copolymer of (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester,

[0013] (B) Batyl alcohol, and

[0014] (C) A polar oil in an amount of 10% by mass or more based on the total amount of the composition.

[0015] The oil-in-water emulsion composition of the present invention preferably further contains (D) higher alcohol.

[0016] The oil-in-water emulsion composition of the present invention preferably further contains (E) alkyl-modified carboxyvinyl polymer.

[0017] (C) Polar oil is preferably an ultraviolet absorber.

[0018] (B) The mass ratio of batyl alcohol and (D) higher alcohol is preferably 1:1 to 1:3.

[0019] When the oil-in-water emulsion composition of the present invention contains a surfactant, the surfactant is preferably (F) a nonionic surfactant having an HLB of 10 to 20, and its blending amount is preferably 0.6% by mass or less based on the total amount of the composition.

[0020] Effects of the Invention

[0021] The oil-in-water emulsion composition of the present invention contains: (A) (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester copolymer, (B) batyl alcohol, and (C) a polar oil of 10% by mass or more based on the total amount of the composition. Therefore, it has excellent emulsion stability and a more moisturizing feeling in use. Detailed Description of Embodiments

[0022] Hereinafter, the present invention will be described in detail.

[0023] The oil-in-water emulsion composition of the present invention contains:

[0024] (A) (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester copolymer,

[0025] (B) batyl alcohol, and

[0026] (C) a polar oil of 10% by mass or more based on the total amount of the composition. Hereinafter, each component will be described in detail.

[0027] It should be noted that in this specification, POE is an abbreviation for polyoxyethylene, POP is an abbreviation for polyoxypropylene, PEG is an abbreviation for polyethylene glycol, and DPG is an abbreviation for dipropylene glycol.

[0028] (A) (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester copolymer

[0029] (A) (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester copolymer (hereinafter also simply referred to as component (A)) means:

[0030] (a1) acrylic acid or methacrylic acid,

[0031] (a2) an alkyl acrylate or an alkyl methacrylate,

[0032] (a3) an ester of acrylic acid or methacrylic acid and a polyoxyethylene alkyl ether

[0033] copolymer.

[0034] These include, for example, acrylic acid (ester) / ceteth-20 methacrylate copolymer, acrylic acid (ester) / steareth-20 methacrylate copolymer, acrylic acid (ester) / steareth-25 methacrylate copolymer, acrylic acid (ester) / steareth-50 methacrylate copolymer, acrylic acid (ester) / behenylmethacrylate copolymer, acrylic acid (ester) / steareth-20 methacrylate cross-linked polymer, acryloyldimethyltaurate / behenylmethacrylate cross-linked polymer, etc., which are listed in the International Cosmetic Ingredient Dictionary (ICID, International Cosmetic Ingredient Dictionary), and are commercially available as aqueous dispersions (polymer emulsions).

[0035] As the component (A) used in the oil-in-water emulsion composition of the present invention, it is preferably selected from acrylic acid (ester) / steareth-20 methacrylate copolymer (ACULYN 22; manufactured by ROHM AND HAAS), acrylic acid (ester) / steareth-25 methacrylate copolymer (ACULYN 28; manufactured by ROHM AND HAAS), acrylic acid (ester) / steareth-20 methacrylate cross-linked polymer (ACULYN 88; manufactured by ROHM AND HAAS), and acryloyldimethyltaurate / behenylmethacrylate cross-linked polymer (Aristoflex HMB; manufactured by Clariant Production Uk Ltd). Among them, acrylic acid (ester) / steareth-20 methacrylate copolymer or acrylic acid (ester) / steareth-20 methacrylate cross-linked polymer is particularly preferred.

[0036] The aqueous dispersion of the above acrylic polymer is diluted with water or the like as needed and thickened by adding an alkali agent for neutralization. As the alkali agent for copolymer neutralization, there is no particular limitation, and inorganic alkalis such as sodium hydroxide or potassium hydroxide, organic alkalis such as triethanolamine or isopropanolamine, and basic amino acids can be used.

[0037] Regarding the compounding amount of component (A), based on the total amount of the composition, it is preferably 0.01 to 3.0% by mass, more preferably 0.05 to 2.0% by mass, still more preferably 0.1 to 1.4% by mass, and even more preferably 0.2 to 1.0% by mass in terms of the actual polymer content. By making the compounding amount 0.01% by mass or more, the emulsion stability can be further obtained, and by making it 3.0% by mass or less, the usability such as being moist and collapsing during coating can be further improved.

[0038] (B) Batyl alcohol

[0039] Batyl alcohol (C 21 H 44 O3) is also known as octadecyl glycerol ether, glycerol monostearyl ether, etc., and is a kind of glycerol monoalkyl ether formed by ether bonding of a long-chain fatty alcohol with 18 carbon atoms at the sn-1 position of glycerol. By (B) batyl alcohol, the improvement of the stability of the polymer emulsion of component (A) can be achieved.

[0040] Regarding the compounding amount of (B) batyl alcohol, it is preferably 0.02 to 3% by mass, and further preferably 0.1 to 1.0% by mass based on the total amount of the composition. By making the compounding amount 0.02% by mass or more, the emulsion stability can be further improved. In addition, by making it 3% by mass or less, a non-greasy and moist feeling in use can be obtained.

[0041] (C) Polar oil

[0042] The oil-in-water type emulsion composition of the present invention contains (C) polar oil of 10% by mass or more based on the total amount of the composition. (C) Polar oil is not particularly limited as long as it can be used in ordinary cosmetics, pharmaceuticals, and foods. The IOB value is not particularly limited, and preferably 0.05 to 0.80.

[0043] It should be noted that the IOB value is an abbreviation of Inorganic / Organic Balance (inorganicity / organicity ratio), and is a value representing the ratio of the inorganic value to the organic value, and becomes an index representing the degree of polarity of an organic compound. Specifically, the IOB value is expressed as IOB value = inorganic value / organic value.

[0044] Here, regarding the "inorganic value" and "organic value", for example, the "organic value" is set to 20 for 1 carbon atom in the molecule, and the "inorganic value" is set to 100 for 1 hydroxyl group, and the "inorganic value" and "organic value" corresponding to various atoms or functional groups are set in this way. By accumulating the "inorganic value" and "organic value" of all atoms and functional groups in the organic compound, the IOB value of the organic compound can be calculated (for example, refer to Fujita, "Chemical Field", Volume 11, No. 10, pages 719 to 725, 1957).

[0045] Regarding the blending amount of the (C) polar oil, it is more preferably 12 to 40% by mass, and further preferably 15 to 30% by mass, relative to the total amount of the composition. Generally, polar oils tend to deteriorate the stability of oil-in-water emulsified compositions, but the oil-in-water emulsified composition of the present invention can stably blend polar oils even when containing 10% by mass or more of the (C) polar oil relative to the total amount of the composition.

[0046] As representative examples of the polar oil, ester oils and ultraviolet absorbers can be cited.

[0047] As specific examples of the ester oil, tripropylene glycol dipelargonate, isononyl isononanoate, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, diisooctyl adipate, cetyl lactate, tetradecyl lactate, acetylated lanolin, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, cetyl ethylhexanoate, ethylene glycol bis(2-ethylhexanoate), dipentaerythritol fatty acid ester, mono-N-alkyl glycol isostearate, neopentyl glycol didecanoate, diisostearyl malate, glycerol bis(2-heptylundecanoate), trimethylolpropane tris(2-ethylhexanoate), trimethylolpropane triisostearate, pentaerythritol tetra(2-ethylhexanoate), triisooctanoin (tri-2-ethylhexanoin), trioctanoin, tripalmitin, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, glyceryl trimyristate, glyceryl tris(2-heptylundecanoate), methyl ricinoleate, oleyl oleate, acetyl glyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid 2-octyldodecyl ester, bis(2-heptylundecyl) adipate, ethyl laurate, bis(2-ethylhexyl) sebacate, 2-hexyl decyl myristate, 2-hexyl decyl palmitate, 2-hexyl decyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, etc. can be cited.

[0048] The ultraviolet absorber is not particularly limited, and ultraviolet absorbers generally used in cosmetics can be widely cited. For example, benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, benzotriazole derivatives, anthranilic acid derivatives, imidazoline derivatives, benzylidene malonate derivatives, 4,4-diarylbutadiene derivatives, etc. can be exemplified. Specific examples and trade names, etc. are listed below, but are not limited to these.

[0049] As benzoic acid derivatives, examples include ethyl p-aminobenzoate (PABA), ethyl dipropylaminobenzoate, ethylhexyl dimethyl PABA (e.g., "ESCALOL 507"; ISP), glyceryl PABA, PEG-25-PABA (e.g., "Uvinul P25"; BASF), hexyl diethylaminohydroxybenzoylbenzoate (e.g., "Uvinul A Plus"), etc.

[0050] As salicylic acid derivatives, examples include homosalate ("Eusolex HMS"; RONA / EM industries), ethylhexyl salicylate (octyl salicylate, e.g., "Neo Heliopan OS"; Harman and Raymer), dipropylene glycol salicylate (e.g., "Dipsal"; Skell), TEA salicylate (e.g., "Neo Heliopan TS"; Harman and Raymer), etc.

[0051] As cinnamic acid derivatives, examples include octyl methoxycinnamate or ethylhexyl methoxycinnamate (e.g., "PARSOL MCX"; Hoffmann-La Roche), isopropyl methoxycinnamate, isopentyl methoxycinnamate (e.g., "Neo Heliopan E1000"; Harman and Raymer), cinoxate, DEA methoxycinnamate, methyl diisopropylcinnamate, glyceryl ethylhexanoate dimethoxycinnamate, bis(2-ethylhexyl)-4'-methoxybenzylidenemalonate, etc.

[0052] As dibenzoylmethane derivatives, examples include 4-tert-butyl-4'-methoxydibenzoylmethane (e.g., "PARSOL 1789"), etc.

[0053] As β,β-diphenylacrylate derivatives, examples include octocrylene (e.g., "Uvinul N539T"; BASF), etc.

[0054] As benzophenone derivatives, examples include benzophenone-1 (e.g., “Uvinul 400”; BASF), benzophenone-2 (e.g., “Uvinul D50”; BASF), benzophenone-3 or oxybenzone (e.g., “Uvinul M40”; BASF), benzophenone-4 (e.g., “Uvinul MS40”; BASF), benzophenone-5, benzophenone-6 (e.g., “Helisorb 11”; Norquay), benzophenone-8 (e.g., “Spectra-Sorb UV-24”; Americancyanamide), benzophenone-9 (e.g., “Uvinul DS-49”; BASF), benzophenone-12, etc.

[0055] As benzylidene camphor derivatives, examples include 3-benzylidene camphor (e.g., “Mexoryl SD”; Chimex), 4-methylbenzylidene camphor, benzylidene camphor sulfonic acid (e.g., “Mexoryl SL”; Chimex), benzalkonium methyl sulfate camphor (e.g., “Mexoryl SO”; Chimex), terephthalylidene dicamphor sulfonic acid (e.g., “Mexoryl SX”; Chimex), polyacrylamidomethyl benzylidene camphor (e.g., “Mexoryl SW”; Chimex), etc.

[0056] As phenylbenzimidazole derivatives, examples include phenylbenzimidazole sulfonic acid (e.g., “Eusolex232”; Merck), disodium phenyl dibenzimidazole tetrasulfonate (e.g., “Neo Heliopan AP”; Harman and Raymer), etc.

[0057] As triazine derivatives, examples include bis-ethylhexyloxyphenol methoxyphenyl triazine (e.g., “Tinosorb S”; Ciba Specialty Chemicals), ethylhexyl triazone (e.g., “Uvinul T150”; BASF), diethylhexyl butamido triazone (e.g., “Uvasorb HEB”; 3V Sigma), 2,4,6-tris(diisobutyl-4'-aminobenzylidene) malonate-s-triazine, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl) anilino]-1,3,5-triazine, etc.

[0058] As benzotriazole derivatives, examples include cresol triazole trisiloxane (e.g., "Silatrizole"; Rhodia Symi), methylene bis-benzotriazolyl tetramethylbutylphenol (e.g., "Tinosorb M" (Ciba Specialty Chemicals)), and the like.

[0059] As anthranilic acid derivatives, examples include menthyl anthranilate (e.g., "Neo Heliopan MA"; Harman and Raymer), and the like.

[0060] As imidazoline derivatives, examples include ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate, and the like.

[0061] As benzylidene malonate derivatives, examples include polyorganosiloxanes having a benzylidene malonate functional group (e.g., polysiloxane-15; "PARSOL SLX"; DSM Nutrition JAPAN), and the like.

[0062] As 4,4-diarylbutadiene derivatives, examples include 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene, and the like.

[0063] The polar oil preferably contains an ultraviolet absorber, and all of them may also be ultraviolet absorbers. In addition, the ultraviolet absorber may be incorporated in a combination of one or more than two kinds.

[0064] (D) Higher alcohols

[0065] The oil-in-water emulsion composition of the present invention preferably contains higher alcohols. As the higher alcohols, there is no particular limitation as long as they are higher alcohols having 6 or more carbon atoms that can be used in the fields of cosmetics, pharmaceuticals, quasi-drugs, etc., and examples include saturated straight-chain monohydric alcohols, unsaturated monohydric alcohols, and the like.

[0066] As the saturated straight-chain monohydric alcohols, examples include dodecanol (lauryl alcohol), tridecanol, tetradecanol (myristyl alcohol), pentadecanol, hexadecanol (cetyl alcohol), heptadecanol, octadecanol (stearyl alcohol), nonadecanol, eicosanol (arachidyl alcohol), heneicosanol, docosanol (behenyl alcohol), tricosanol, tetracosanol (lignoceryl alcohol), pentacosanol, hexacosanol (ceryl alcohol), and the like.

[0067] As the unsaturated monohydric alcohols, examples include trans-9-octadecenol, and the like. In the present invention, from the viewpoint of stability over time, saturated straight-chain monohydric alcohols are preferred.

[0068] In the present invention, the higher alcohol can be used singly or in combination of two or more of the above. In the present invention, a monohydric fatty alcohol having 16 to 22 carbon atoms is preferably used. It should be noted that in the present invention, in the case of using a plurality of higher alcohols, from the viewpoint of stability, a mixture of a combination having a melting point of 60 °C or higher is particularly preferred.

[0069] Regarding the compounding amount of (D) higher alcohol, it is preferably 0.02 to 9% by mass, more preferably 0.05 to 5.0% by mass, still more preferably 0.1 to 3.0% by mass, and particularly preferably 0.2 to 1% by mass, based on the total amount of the composition. By making the compounding amount 0.02% by mass or more, the emulsion stability can be further improved. In addition, by making it 9% by mass or less, a non-greasy and moist feeling in use can be obtained.

[0070] When the oil-in-water emulsion composition of the present invention contains (D) higher alcohol, the mass ratio of (B) batyl alcohol to (D) higher alcohol is preferably 1:1 to 1:3. When (D) higher alcohol is contained, (B) batyl alcohol and (D) higher alcohol form an α-type hydrated crystal structure. Thereby, the emulsion stability of a polymer emulsion with weak stability can be further improved, and the moist feeling and non-greasy usability in use can be further improved.

[0071] (E) Alkyl-modified carboxyvinyl polymer

[0072] As the alkyl-modified carboxyvinyl polymer, from the viewpoint of having good emulsion stability and a moist feeling in use, polyacrylate / C10-30 alkanol acrylate crosslinked polymer can be preferably exemplified. The polyacrylate / C10-30 alkanol acrylate crosslinked polymer can be a commercially available product, and examples thereof include Pemulen TR-2 polymer emulsifier (manufactured by Lubrizol Advanced Materials, Inc.).

[0073] Regarding the compounding amount of (E) alkyl-modified carboxyvinyl polymer, it is preferably in the range of 0.01 to 1% by mass, more preferably 0.03 to 0.5% by mass, still more preferably in the range of 0.03 to 0.2% by mass, based on the total amount of the composition. By making it 0.01% by mass or more, the stability can be better. In addition, by making it 1% by mass or less, a more moist and light feeling in use can be formed.

[0074] (F) Nonionic surfactant having an HLB of 10 to 20

[0075] In the oil-in-water emulsion composition of the present invention, the blending amount of the surfactant is preferably 1% by mass or less relative to the total amount of the composition. By setting the blending amount of the surfactant to 1% by mass or less, it is possible to further improve the wateriness and the usability without greasiness during use. In particular, since the oil-in-water emulsion composition of the present invention has high emulsion stability, it may not contain any surfactant. When blending according to the form of the composition or the like, a nonionic surfactant with an HLB (Hydrophilic-Lipophilic Balance) of 10 to 20 is preferred. More preferably, a nonionic surfactant with an HLB of 12 to 20 is used. (F) The blending amount of the nonionic surfactant is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.8% by mass, and further preferably 0.1 to 0.6% by mass relative to the total amount of the composition. By being 0.01% by mass or more, it is beneficial to the formation of the α-gel, and by being 1% by mass or less, it is possible to further improve the usability without greasiness during use.

[0076] As the nonionic surfactant, it may be selected from glycerol or polyglycerol fatty acid esters, propylene glycol fatty acid esters, POE sorbitan fatty acid esters, POE sorbitol fatty acid esters, POE glycerol fatty acid esters, POE fatty acid esters, POE alkyl ethers, POE alkyl phenyl ethers, POE·POP alkyl ethers, POE castor oil or hydrogenated castor oil derivatives, POE beeswax·lanolin derivatives, alkanolamides, POE propylene glycol fatty acid esters, POE alkylamines, POE fatty acid amides, etc. In specific examples, it includes hydrogenated castor oil derivatives such as PEG-40 hydrogenated castor oil, PEG-50 hydrogenated castor oil, PEG-60 hydrogenated castor oil, PEG-60 glyceryl isostearate, PEG-50 hydrogenated castor oil succinate, and ceteth-25.

[0077] In addition to the above (A) to (F), the oil-in-water emulsion composition of the present invention can be selected from (C) polar oils and oils other than (D) higher alcohols that are generally usable in cosmetics, within the range that does not impair stability. As desirable oils, liquid oils, solid oils, waxes, hydrocarbon oils, higher fatty acids, silicone oils, etc. can be cited.

[0078] As the liquid oil, for example, avocado oil, camellia seed oil, macadamia nut oil, corn oil, olive oil, rapeseed oil, sesame oil, peach kernel oil, wheat germ oil, camellia oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, torreya nucifera oil, rice bran oil, paulownia oil, japanese wood oil, jojoba oil, germ oil, triglyceride, etc. can be cited.

[0079] As solid fats and oils, for example, cocoa butter, coconut oil, hydrogenated coconut oil, palm oil, palm kernel oil, illipe butter, hydrogenated oil, Japan wax, hydrogenated castor oil, etc. can be mentioned.

[0080] As waxes, for example, beeswax, candelilla wax, cotton wax, carnauba wax, myrica wax, shellac wax, montan wax, bran wax, kapok wax, sugarcane wax, jojoba wax, shellac wax, POE cholesteryl ether, etc. can be mentioned.

[0081] As hydrocarbon oils, for example, liquid paraffin, ozokerite, squalane, pristane, paraffin wax, ceresin, squalene, petrolatum, microcrystalline wax, hydrogenated polydecene, etc. can be mentioned.

[0082] As higher fatty acids, for example, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tall oil fatty acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), etc. can be mentioned.

[0083] As silicone oils, for example, linear polysiloxanes (e.g., dimethyl silicone oil, methylphenyl polysiloxane, diphenyl polysiloxane, etc.); cyclic polysiloxanes (e.g., octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc.), silicone resins forming a three-dimensional network structure, silicone rubbers, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.) can be mentioned.

[0084] The above-mentioned each oil component can be used alone or in a suitable combination of two or more.

[0085] When blending the above-mentioned oil components other than (C) polar oil and (D) higher alcohol, the blending amount is preferably 1.0 to 20% by mass, more preferably 5.0 to 15% by mass with respect to the total amount of the composition. By making the blending amount 1.0% by mass or more, precipitation inhibition of the ultraviolet absorber and compatibility of the oil components can be ensured, and by making it 20% by mass or less, emulsion stability and usability can be further improved.

[0086] The oil-in-water type emulsified composition of the present invention can blend any other components that can be blended in ordinary cosmetics and quasi-drugs within the range not impairing the effects of the present invention. As other arbitrary components, there is no limitation, and for example, powder components, colorants, humectants, aqueous thickeners, dispersants, preservatives, fragrances, various medicaments, etc. can be mentioned.

[0087] As powder components, ultraviolet scattering agents such as zinc oxide and titanium oxide, extender pigments such as talc, mica, and kaolin, polymer powders such as polyethylene powder, polymethyl methacrylate powder, and nylon powder, etc. can be mentioned.

[0088] As humectants, polyhydric alcohols such as glycerin, 1,3 - butanediol, dipropylene glycol, and propylene glycol, trehalose, water - soluble polymers such as hyaluronic acid and chondroitin sulfate can be cited, for example.

[0089] As aqueous thickeners, succinoglycan, dimethylacrylamide / sodium acryloyldimethyltaurate cross - polymer, cellulose gum, carboxyvinyl polymer, xanthan gum, hydroxyethyl acrylate / sodium acryloyldimethyltaurate copolymer, etc. can be cited, for example.

[0090] The oil - in - water type emulsified composition of the present invention can be produced by conventional methods for oil - in - water type emulsified compositions (cosmetics), such as mixing the components constituting the oil phase and the components constituting the water phase separately and adding the oil phase to the water phase for emulsification.

[0091] The oil - in - water type emulsified composition of the present invention can be provided as cosmetics in various dosage forms such as liquid, milk - liquid, cream - like, gel - like, and Bavarois - like.

[0092] In addition, the oil - in - water type emulsified composition of the present invention can be provided as skin - care cosmetics, sunscreen cosmetics, cosmetics containing coloring agents, liquid foundations, base creams, and BB creams.

[0093] The oil - in - water type emulsified composition of the present invention can obtain a unique moist feel in use brought about by high - molecular emulsification using (A) (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester copolymer. In addition, by using (B) batyl alcohol in combination, the emulsification stability is improved. Therefore, 10% or more of (C) polar oil represented by ultraviolet absorbers can be incorporated. Thus, if an ultraviolet absorber is incorporated as the (C) polar oil, a cosmetic with excellent emulsification stability having a moist feel in use and high ultraviolet protection ability can be obtained.

[0094] Examples

[0095] Examples are given below to further specifically illustrate the present invention, but the present invention is not limited to these. Unless otherwise specified, the blending amounts are all in mass%.

[0096] (Examples 1 - 6 and Comparative Example 1)

[0097] An oil - in - water type emulsified composition was prepared according to the formulation shown in Table 1 below, and the prepared composition was evaluated according to the following criteria.

[0098] (Rolling test)

[0099] A cylindrical container was half filled with the prepared oil-in-water emulsion composition, and the sample was subjected to rotational motion at 45 rpm for 4 hours at room temperature using a rolling tester (manufactured by Nagikawa Rika Industry Co., Ltd.). The state change of the composition was observed and evaluated based on the following criteria.

[0100] A: No change

[0101] B: Slight viscosity change or emulsified particles increase, but no problem in use

[0102] C: A lot of changes in viscosity or enlarged emulsified particles are visible, which brings obstacles to use

[0103] D: Visible oil detachment

[0104] (Usability)

[0105] Ten panelists evaluated the viscosity of the prepared oil-in-water emulsion composition after application. The evaluation criteria are as follows.

[0106] <Rating>

[0107] 5 points: Very good

[0108] 4 points: Good

[0109] 3 points: Average

[0110] 2 points: Poor

[0111] 1 point: Very bad

[0112] <Evaluation Criteria>

[0113] A: Average score is 4.5 or above

[0114] B: The average score is 3.5 points or more and less than 4.5 points

[0115] C: The average score is 2.5 points or more and less than 3.5 points

[0116] D: Average score is less than 2.5 points

[0117] The formulation and evaluation results are shown in Table 1. In addition, the commercial product names of the main substances among the components shown in the table are shown below.

[0118] · Acrylates / C10-30 Alkyl Acrylate Crosspolymer: PEMULENTR-2 (manufactured by Lubrizol Advanced Materials, Inc.)

[0119] · Ammonium acryloyldimethyltaurate / behenyl alcohol polyether-25 methacrylate cross-polymer: ARISTOFLEX HMB (manufactured by Clariant GMBH)

[0120] · PEG-60 glyceryl isostearate: EMALEX GWIS-160 (manufactured by NIHON EMULSION Co., Ltd.)

[0121] · PEG-60 hydrogenated castor oil: NIKKOL HCO-60 (manufactured by NIPPON SURFACTANT INDUSTRIES CO., LTD.)

[0122] · Lauryl betaine: ANON BL-SF (manufactured by NOF Corporation)

[0123] · Bis-butyl poly(dimethylsiloxane) polyglycerol-3: Silicone KF-6109 (manufactured by Shin-Etsu Chemical Co., Ltd.)

[0124] · Polysiloxane-11: Gransil DMG-3 (manufactured by GRANT INDUSTRIES)

[0125] [Table 1]

[0126]

[0127] As shown in Table 1, Examples 1 to 6 containing (A) (meth)acrylic acid / (meth)acrylic acid alkyl ester / (meth)acrylic acid POE monoalkyl ether ester copolymer, (B) batyl alcohol, and (C) a polar oil of 10% by mass or more based on the total amount of the composition have excellent emulsion stability even when polymer-emulsified, and a moist feeling of use without stickiness can be obtained after coating. On the other hand, in Comparative Example 1 that does not contain (B) batyl alcohol, emulsion stability cannot be obtained even when higher alcohols are contained.

Claims

1. An oil-in-water emulsion composition comprising: (A) Ammonium acryloyldimethyltaurate / behenyl alcohol polyether-25 methacrylate crosspolymer, (B) Batyl alcohol, and (C) A polar oil in an amount of 10% by mass or more based on the total amount of the composition, wherein the polar oil is an ultraviolet absorber.

2. The oil-in-water emulsion composition according to claim 1, further comprising (D) a higher alcohol.

3. The oil-in-water emulsion composition according to claim 1 or 2, further comprising (E) an alkyl-modified carboxyvinyl polymer.

4. The oil-in-water emulsion composition according to claim 2, wherein, The mass ratio of the (B) batyl alcohol to the (D) higher alcohol is 1:1 to 1:

3.

5. The oil-in-water type emulsified composition according to claim 1, 2 or 4, wherein, (F) A nonionic surfactant having an HLB of 10 to 20 is 0.6% by mass or less based on the total amount of the composition.

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