(meth)acrylic silicone copolymer and cosmetics containing the same

Abstract

This invention provides a copolymer that exhibits excellent compatibility with oils and silicone oils, and is useful as a thickening agent for oils when incorporated into cosmetics. [Solution] A monomer copolymer containing 81% by mass or more of (a) and (b), wherein the number average molecular weight is 5,000 to 500,000 (meth)acrylic silicone copolymer. (a) Formula (1) below: 20 to 80% by mass TIFF2026076704000026.tif27112 (b) Formula (2) below: 20-80% by mass TIFF2026076704000027.tif2891

Description

[Technical Field]

[0001] The present invention relates to (meth)acrylic silicone copolymers and cosmetics containing the same. [Background technology]

[0002] In cosmetics, thickeners (gelling agents) are used to increase the viscosity of oily components, alter the feel of the cosmetic, and improve stability by suppressing emulsion separation. The oily components used in cosmetics are selected according to their purpose, including hydrocarbon oils, higher fatty acids, higher alcohols, esters, polar oils such as UV absorbers, and silicone oils. Silicone oils, characterized by their light feel, are particularly frequently used. However, silicone oils have poor compatibility with other oily components, making the selection of a thickener difficult when using them in combination.

[0003] On the other hand, (meth)acrylic copolymers are used in cosmetics as thickeners and film-forming agents due to their excellent adhesion to the skin. However, they have poor compatibility with silicone oils, resulting in stability issues when used as a thickener for silicone oils. However, Patent Document 1 has shown that silicone oils can be thickened by improving their compatibility with silicone oils. This is a partially crosslinked copolymer of hydrophilic (meth)acrylic monomer, hydrophobic (meth)acrylic monomer, and methacrylic-modified silicone at both ends, and the thickening is achieved by hydrogen bonding and crosslinking structure by the hydrophilic (meth)acrylic monomer. However, when used in cosmetics, these hydrogen bonds can be weakened by other components, resulting in reduced thickening properties. Therefore, there is a need for a thickener that can improve the desired feel, stability, and adhesion regardless of the type of oil used. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-182431 [Overview of the Initiative]

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a (meth)acrylic silicone copolymer that is excellent in compatibility with various oils and silicone oils and is useful as a thickening agent for oils when formulated in cosmetics. Another object of the present invention is to provide a cosmetic that is excellent in stability and can be expected to have various effects.

Means for Solving the Problems

[0006] As a result of intensive studies to achieve the above object, the present inventor found that a copolymer obtained by copolymerizing a monomer containing an organopolysiloxane monomer (a) having a polymerizable group and a radical-polymerizable monomer (b) having a long-chain alkyl group via a urethane bond or a urea bond has good compatibility with oils and can be gelled. Although the mechanism is not clear, a long-chain alkyl (meth)acrylate copolymer without a urethane bond or a urea bond dissolves in oils and cannot be gelled, whereas having a urethane bond or a urea bond is expected to strengthen the intermolecular and intramolecular interactions and suppress the decrease in the crystallinity of the long-chain alkyl group in oils. Furthermore, the present inventor found that a cosmetic containing this copolymer can provide a cosmetic that is excellent in stability and can be expected to have various effects even when various oils and silicone oils are used in combination, and thus the present invention was completed.

[0007] Therefore, the present invention provides a (meth)acrylic silicone copolymer and a cosmetic. 1. A copolymer of monomers containing more than 80% by mass of the following (meth)acrylic polymerizable monomers (a) and (b), which is a (meth)acrylic silicone copolymer having a number average molecular weight of 5,000 to 500,000. (a) The following formula (1): 20 to 80% by mass

Chemical formula

Chemical formula

Chemical formula

[0008] According to the present invention, a (meth)acrylic silicone copolymer is provided that has excellent compatibility with oils and silicone oils and is useful as a thickening agent for oils when incorporated into cosmetics. Cosmetics containing this copolymer have excellent stability and can be expected to have various effects. [Modes for carrying out the invention]

[0009] The present invention will be described in detail below. In this invention, ingredient names may be described using cosmetic names or International Nomenclature of Cosmetic Ingredient (INCI). If the cosmetic name and the INCI correspond, the cosmetic name or English description may be omitted.

[0010] The (meth)acrylic silicone copolymer of the present invention is a copolymer of monomers containing (meth)acrylic polymerizable monomers (a) and (b), and is a (meth)acrylic silicone copolymer having a molecular weight of 5,000 to 500,000. (Meth)acrylic silicone refers to acrylic silicone, methacrylic silicone, or both.

[0011] [(a) monomer] (a) The monomer is given by the following formula (1) [ka] (In the formula, R 1 X is a hydrogen atom or a methyl group, X is a linear or branched divalent hydrocarbon group having 1 to 10 carbon atoms, R 2 (where n is a monovalent hydrocarbon group with 1 to 10 carbon atoms, and n is between 0 and 100.) These monomers are represented by [formula] and can be used individually or in combination of two or more types.

[0012] R 1R is a hydrogen atom or a methyl group. X is a linear or branched divalent hydrocarbon group having 1 to 10 carbon atoms, specifically including methylene, ethylene, propylene, butylene, and octylene groups, with ethylene and propylene groups being preferred. 2 This is a monovalent hydrocarbon group having 1 to 10 carbon atoms, specifically including methyl, ethyl, propyl, butyl, hexyl, octyl, and decyl groups, with methyl and butyl groups being preferred.

[0013] In the (meth)acrylic silicone copolymer of the present invention, component (a) is 20 to 80% by mass. If it is less than this, the compatibility with the silicone oil will be poor, and if it is more than this, the effect of thickening the oil will be lost and the stability of the cosmetic composition will decrease. The optimal weight percent varies depending on the type of oil, but 30 to 70% by mass is preferred, and 40 to 60% by mass is more preferred.

[0014] [(b) monomer] (b) The monomer is given by the following formula (2) [ka] (In the formula, R 1 X is the same as above, and R 3 Y is a monovalent hydrocarbon group with 18 to 30 carbon atoms. 1 and Y 2 Each of these is independently either NH or O, and at least one of them is NH. These monomers are represented by [formula] and can be used individually or in combination of two or more types.

[0015] R 1 X is the same as above, but R in equation (1) and equation (2) 1 X and R are independent of each other. 3 This is a hydrocarbon group having 18 to 30 carbon atoms, specifically including octadecyl, eicosyl, docosyl, octacosyl, and triacontyl groups, with octadecyl and docosyl groups being preferred.

[0016] In the (meth)acrylic silicone copolymer of the present invention, component (b) is 20 to 80% by mass. If it is less than this, the effect of thickening the oil is lost, and if it is more than this, the compatibility with the silicone oil deteriorates and the stability of the cosmetic composition decreases. The optimal mass percentage varies depending on the type of oil, but 30 to 70% by mass is preferred, and 40 to 60% by mass is more preferred.

[0017] [(b) Method for producing (meth)acrylic monomer] The (meth)acrylic monomer, which is component (b) of the present invention, has a urea bond or a urethane bond. This monomer can be produced, for example, by the reaction of an isocyanate group-containing (meth)acrylic monomer with a hydroxyl group-containing compound or an amino group-containing compound, or by the reaction of a hydroxyl group-containing (meth)acrylic monomer with an alkyl isocyanate.

[0018] Examples of isocyanate group-containing (meth)acrylic monomers include 2-(meth)acryloylethyl isocyanate, examples of hydroxyl group-containing compounds include 1-octadecanol, 1-docosylamine, 1-octacosanol, and examples of amino group-containing compounds include 1-octadecylamine, 1-docosylamine, 1-octacosylamine, and examples of 1-octadecylamine.

[0019] Examples of hydroxyl group-containing (meth)acrylic monomers include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate, while examples of alkyl isocyanates include 1-octadecyl isocyanate, 1-docosyl isocyanate, and 1-octacosyl isocyanate.

[0020] These reactions can be carried out by known methods. For example, they can be produced by mixing an isocyanate group-containing (meth)acrylic monomer with a hydroxyl group-containing compound or an amino group-containing compound and heating the mixture. A catalyst may also be added as needed; known catalysts such as tin-based catalysts like dibutylsulate or amine-based catalysts like triethylamine can be used. The reaction temperature is preferably 0 to 100°C, and more preferably 20 to 80°C. Furthermore, a solvent may be used; examples of solvents that do not contain active hydrogen include hexane, dodecane, toluene, xylene, tetrahydrofuran, acetone, methyl ethyl ketone, and ethyl acetate.

[0021] The copolymer of the present invention is a monomer copolymer containing more than 80% by mass of the above-mentioned (meth)acrylic polymerizable monomers (a) and (b). This ratio is preferably 90% by mass or more, more preferably 95% by mass, and may be 100% by mass. The amounts of these monomers are as described above, but the mass ratio of (a):(b) is preferably 20-80:20-80, more preferably 30-70:30-70, and even more preferably 40-60:40-60.

[0022] [(c)Monomer] In the (meth)acrylic silicone copolymer of the present invention, further, the following formula (3) [ka] (In the formula, R 1 , Y 1 This is the same as above, R 4 is a hydrogen atom, a linear or branched monovalent hydrocarbon group having 1 to 22 carbon atoms, a hydroxyalkyl group having 1 to 5 carbon atoms, -(C m H 2m O) a R 5 (m is 2-4, a is 1-20, R 5 (The group is selected from a polyoxyalkylene group (represented by a hydrogen atom or an alkyl group having 1 to 10 carbon atoms) and a glyceryl group.) The (meth)acrylic polymerizable monomer (c) may be included. This monomer can be used alone or in combination of two or more.

[0023] R 1 , Y 1 The above is the same, but in formulas (1), (2), and (3), R 1 , Y 1 These are independent of each other. 4 is a hydrogen atom, a linear or branched monovalent hydrocarbon group having 1 to 22 carbon atoms, a hydroxyalkyl group having 1 to 5 carbon atoms, -(C m H 2m O) a R 5 (m is 2-4, a is 1-20, R 5 The group is selected from a polyoxyalkylene group (represented by a hydrogen atom or an alkyl group having 1 to 10 carbon atoms) and a glyceryl group. Examples of valence hydrocarbon groups having 1 to 22 carbon atoms include linear or branched groups such as methyl, ethyl, propyl, butyl, hexyl, octyl, decyl, dodecyl, and hexadecyl groups. Among these, monovalent hydrocarbon groups having 1 to 16 carbon atoms are preferred. Examples of hydroxyalkyl groups having 1 to 5 carbon atoms include hydroxyethyl, hydroxypropyl, and hydroxybutyl groups. 4 Preferably, the group is a methyl group, an octyl group, or a hydroxyethyl group.

[0024] When (meth)acrylic polymerizable monomer (c) is included, the amount is preferably 0.1% by mass or more and less than 20% by mass in the (meth)acrylic silicone copolymer. By setting it to less than 20% by mass, the characteristic effect of the present invention, which is to thicken oils, can be more effectively exhibited. Furthermore, it can also be 10% by mass or less, or 5% by mass or less, which further improves the stability when incorporated into cosmetics.

[0025] The composition of the (meth)acrylic silicone copolymer may be only monomers (a) and (b), only monomers (a), only monomers (b) and (c), or may contain other polymerizable monomers. However, the proportion of other polymerizable monomers other than monomers (a) and (b) is preferably less than 20% by mass, more preferably 10% by mass or less, and even more preferably 5% by mass or less in the (meth)acrylic silicone copolymer.

[0026] Furthermore, the number-average molecular weight of the (meth)acrylic silicone copolymer of the present invention is 5,000 to 500,000, preferably 10,000 to 400,000, and more preferably 10,000 to 100,000. In this invention, the number-average molecular weight is the value obtained by GPC (gel permulation chromatography) analysis using polystyrene as a standard substance under the following conditions. [Measurement conditions] Developing solvent: Tetrahydrofuran (THF) Flow rate: 0.6mL / min Detector: Differential refractive index detector (RI) Column: TSK Guardcolumn SuperH-H TSKgel SuperHM-N(6.0mmI.D.×15cm×1) TSKgel SuperH2500(6.0mmI.D.×15cm×1) (All manufactured by Tosoh Corporation) Column temperature: 40℃ Sample injection volume: 50 μL (THF solution with a concentration of 0.3% by mass)

[0027] [Meth)acrylic silicone copolymer manufacturing method] As a method for producing (meth)acrylic silicone copolymers, for example, a monomer mixture containing (a) and (b), or a monomer mixture containing (a), (b), and (c), can be polymerized in the presence of a radical polymerization initiator such as an azo compound such as azobisisobutyronitrile, benzoyl peroxide, or an organic peroxide such as t-butyl-2-ethylperoxyhexanoate. Any of the polymerization methods applicable are solution polymerization, emulsion polymerization, suspension polymerization, and bulk polymerization, and among these, solution polymerization is preferred because it is easy to adjust the molecular weight range of the resulting polymer. The polymerization reaction may be carried out in a solvent, and examples of solvents that can be used include aliphatic hydrocarbons such as pentane, hexane, decane, and hexadecane; aromatic hydrocarbons such as benzene, toluene, and xylene; alcohols such as methanol, ethanol, isopropyl alcohol, and butanol; halogenated hydrocarbons such as chloroform and carbon tetrachloride; and ketones such as acetone and methyl ethyl ketone. Aliphatic hydrocarbons, aromatic hydrocarbons, and alcohols are preferred. The copolymer may be random or block.

[0028] [Cosmetics] The (meth)acrylic silicone copolymer of the present invention exhibits excellent compatibility with oils and silicone oils, and when incorporated into cosmetics applied topically to the skin and hair, it is useful as a thickening agent for oils. Furthermore, it can impart stability to cosmetics, and other effects such as improved feel depending on the dosage form and excellent adhesion to the skin can be expected. The amount of (meth)acrylic silicone copolymer incorporated into the cosmetic is preferably 0.1 to 20% by mass, and more preferably 0.1 to 10% by mass.

[0029] [Oils] The cosmetic composition of the present invention may contain one or more oils depending on its purpose. There are no particular limitations as long as the oils are those commonly used in cosmetics, pharmaceuticals, etc., and solid, semi-solid, or liquid oils can be used. Examples include silicone oil, hydrocarbon oil, ester oil, glyceride oil, natural animal and vegetable oils and fats, semi-synthetic oils and fats, and higher alcohols.

[0030] Examples of silicone oils include cyclotetrasiloxane (INCI), cyclopentasiloxane (INCI), cyclohexasiloxane (INCI), dimethicone (INCI), methyl trimethicone (INCI), tetrakistrimethylsiloxysilane, caprylyl methicone (INCI), phenyl trimethicone (INCI), diphenylsiloxyphenyl trimethicone (INCI), diphenyl dimethicone (INCI), trifluoromethylalkyl (C1-4) dimethicone, amodimethicone (INCI), aminopropyl dimethicone (INCI), and PCA dimethicone (INCI).

[0031] Examples of hydrocarbon oils include linear, branched, and volatile hydrocarbon oils. Specifically, these include olefin oligomers (INCI), isoparaffins such as (C13,14) isoparaffins (INCI), isododecane (INCI), undecane (INCI), dodecane (INCI), isohexadecane (INCI), hydrogenated polyisobutene (INCI), squalane (INCI), mineral oil (INCI), coconut alkanes (INCI), and alkanes such as (C13-15) alkanes (INCI).

[0032] Examples of ester oils include alkyl glycol monoisostearates such as diisobutyl adipate (INCI), dihexyldecyl adipate (indicated name), diheptylundecyl adipate (INCI), isostearyl isostearate (INCI), isocetyl isostearate (INCI), trimethylolpropane triisostearate (INCI), glycol diethylhexanoate (INCI), cetyl ethylhexanoate (INCI), trimethylolpropane triethylhexanoate (INCI), and pentaerythrityl tetraethylhexanoate (INCI) Octyldodecyl esters such as tetraethylhexanoate, octyldodecyl stearoyl oxystearate (INCI: Octyldodecyl Stearoyl Stearate), oleyl oleate (INCI: Oleyl Oleate), octyldodecyl oleate (INCI: Octyldodecyl Oleate), decyl oleate (INCI: Decyl Oleate), neopentyl glycol dioctanoate (INCI: Neopentyl Glycol Diethylhexanoate), neopentyl glycol dicaprate (INCI: Neopentyl Glycol Dicaprate), diisostearyl malate (INCI: Diisostearyl Malate), triethyl citrate (INCI: Triethyl Citrate), diethylhexyl succinate (INCI: Diethylhexyl Succinate), amyl acetate (INCI: Amyl Acetate), ethyl acetate (INCI: Etyl Acetate, Butyl Acetate (INCI), Isocetyl Stearate (INCI)Palmitate esters such as Stearate, Butyl Stearate (INCI), Diisopropyl Sebacate (INCI), Diethylhexyl Sebacate (INCI), Cetyl Lactate (INCI), Myristyl Lactate (INCI), Isononyl Isononanoate (INCI), Isotridecyl Isononanoate (INCI), Isopropyl Palmitate (INCI), Ethylhexyl Palmitate (INCI), Hexyldecyl Palmitate (INCI), Cholesteryl Hydroxystearate (INCI) Examples include myristic acid esters such as hydroxystearate, isopropyl myristate (INCI), octyldodecyl myristate (INCI), myristyl myristate (INCI), ethylhexyl laurate (INCI), hexyl laurate (INCI), dioctyldodecyl lauroyl glutamate (INCI), and isopropyl lauroyl sarcosinate (INCI).

[0033] Examples of glyceride oils include triethylhexanoin (INCI), caprylic / capric triglyceride (INCI), cocoglycerides (INCI), caprylic / capric / succinic triglyceride (INCI), and caprylic / capric glycerides (INCI).

[0034] In addition to these, the following oils can be used depending on the purpose. For example, natural animal and vegetable oils and semi-synthetic oils include avocado oil (INCI: Persea Gratissima (Avocado) Oil), linseed oil (INCI: Linum Usitatissimum (Linseed) Seed Oil), almond oil (INCI: Prunus Amygdalus Dulcis (Sweet Almond) Oil), privet wax, perilla oil (indicated name), hen oil, olive oil (INCI: Olea Europaea (Olive) Fruit Oil), cocoa butter, kapok wax, torreya californica (California Nutmeg) Oil (INCI: Torreya Californica (California Nutmeg) Oil), citronella oil (INCI: Cymbopogon Nardus (Citronella) Oil), nutmeg seed oil (INCI: Torreya Nucifera Seed Oil), and carnauba wax (INCI: Copernicia Cerifera (Carnauba)). Wax), liver oil, candelilla wax (INCI: Euphorbia Cerifera (Candelilla) Wax), refined candelilla wax, beef tallow, beef tallow, beef bone tallow, hydrogenated beef tallow, apricot kernel oil (INCI: Kyounin Yu), whale wax, hydrogenated oil, wheat germ oil (INCI: Triticum Vulgare (Wheat) Germ Oil), sesame oil (INCI: Sesamum Indicum (Sesame) Seed Oil), rice germ oil (INCI: Oryza Sativa (Rice) Germ Oil), rice bran oil (INCI: Oryza Sativa (Rice) Bran Oil), sugarcane wax (INCI: Saccharum Officinarum (Sugarcane) Wax), camellia oil (INCI: Camellia Kissi Seed Oil), safflower oil (INCI: Carthamus Tinctorius (Safflower) Seed Shea butter (INCI: Butyrospermum Parkii (Shea Oil)Butter, cinnamon oil, jojoba wax, squalane (INCI), squalene (INCI), shellac wax, turtle oil (INCI), soybean oil (INCI), camellia seed oil (INCI), camellia japonica seed oil (INCI), evening primrose oil (INCI), corn germ oil (INCI), lard (INCI), rapeseed oil, Japanese kiri oil, rice bran wax (INCI), germ oil, horse fat (INCI), persimmon oil (indicated name), palm oil (INCI: Elaeis Guineensis) (Palm) Oil), Palm Kernel Oil (INCI: Elaeis Guineensis (Palm) Kernel Oil), Castor Oil (INCI: Ricinus Communis (Castor) Seed Oil), Hydrogenated Castor Oil, Castor Oil Fatty Acid Methyl Ester, Sunflower Oil (INCI: Helianthus Annuus (Sunflower) Seed Oil), Grape Seed Oil (INCI: Vitis Vinifera (Grape) Seed Oil), Bayberry Wax, Jojoba Seed Oil (INCI: Simmondsia Chinensis (Jojoba) Seed Oil), Macadamia Seed Oil (INCI: Macadamia Ternifolia Seed Oil), Macadamia Nut Oil (INCI: Macadamia Integrifolia Seed Oil), Beeswax (INCI: Beeswax), Mink Oil, Meadowfoam Oil (INCI: Limnanthes Alba (Meadowfoam) Seed Oil) Cottonseed oil (INCI: Gossypium Herbaceum (Cotton) Seed Oil), cotton wax, Rhus Succedanea Fruit Wax (INCI: Rhus Succedanea Fruit Wax), Rhus Succedanea kernel oil, montan wax (INCI: MontanExamples include wax, coconut oil (INCI: Cocos Nucifera (Coconut) Oil), hydrogenated coconut oil, coconut oil fatty acid glyceride, mutton fat, peanut oil (INCI: Arachis Hypogaea (Peanut) Oil), lanolin (INCI: Lanolin), liquid lanolin (INCI: Lanolin Oil), reduced lanolin, lanolin alcohol (INCI), hard lanolin, lanolin acetate, lanolin alcohol acetate (INCI: Acetylated Lanolin Alcohol), isopropyl lanolin fatty acid (INCI: Isopropyl Lanolate), POE lanolin alcohol ether, POE lanolin alcohol acetate, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, egg yolk oil (INCI: Egg Oil), etc. However, POE means polyoxyethylene.

[0035] Examples of higher alcohols (with 12 to 30 carbon atoms) include lauryl alcohol (INCI), myristyl alcohol (INCI), palmityl alcohol, stearyl alcohol (INCI), behenyl alcohol (INCI), hexadecyl alcohol, oleyl alcohol (INCI), isostearyl alcohol (INCI), hexyldodecanol, octyldodecanol (INCI), cetostearyl alcohol, 2-decyltetradecinol, cholesterol (INCI), phytosterol (INCI), POE cholesterol ether, monostearyl glycerin ether (batyl alcohol), and monooleyl glyceryl ether (cerakyl alcohol).

[0036] The amount of oily agent varies depending on the formulation, but it is preferably 1 to 90% by mass in the cosmetic composition, and more preferably 5 to 70% by mass.

[0037] The cosmetic composition of the present invention may also be in the form of an emulsion further containing water and one or more surfactants, depending on its purpose. The amount of water to be added is appropriately selected depending on the formulation system, preferably 1 to 95% by mass, and more preferably 20 to 80% by mass, in the cosmetic composition.

[0038] Examples of surfactants include anionic, cationic, nonionic, and amphoteric surfactants, but they are not particularly limited; any surfactant commonly used in cosmetics can be used.

[0039] Examples of anionic surfactants include fatty acid soaps such as sodium stearate and triethanolamine palmitate, alkyl ether carboxylic acids and their salts, condensate salts of amino acids and fatty acids, alkanesulfonates, alkenesulfonates, sulfonates of fatty acid esters, sulfonates of fatty acid amides, formalin condensate sulfonates, alkyl sulfate salts, secondary higher alcohol sulfate salts, alkyl and allyl ether sulfate salts, sulfate salts of fatty acid esters, sulfate salts of fatty acid alkylolamides, sulfate salts of belladonna oil, alkyl phosphates, ether phosphates, alkylallyl ether phosphates, amide phosphates, N-acyl lactates, N-acyl sarcosine salts, and N-acyl amino acid-based surfactants; examples of cationic surfactants include alkylamine salts, amine salts such as polyamines and amino alcohol fatty acid derivatives, alkyl quaternary ammonium salts, aromatic quaternary ammonium salts, pyridium salts, and imidazolium salts.

[0040] Examples of nonionic surfactants include sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acid esters, propylene glycol fatty acid esters, polyethylene glycol fatty acid esters, sucrose fatty acid esters, methyl glucoside fatty acid esters, alkyl polyglucosides, polyoxyethylene alkyl ethers, polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene propylene glycol fatty acid esters, polyoxyethylene castor oil, and poly Examples of such surfactants include hydrogenated oxyethylene castor oil, polyoxyethylene phytostanol ether, polyoxyethylene phytosterol ether, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, linear or branched polyoxyalkylene-modified organopolysiloxane, linear or branched polyoxyalkylene-alkyl-comodified organopolysiloxane, linear or branched polyglycerin-modified organopolysiloxane, linear or branched polyglycerin-alkyl-comodified organopolysiloxane, alkanolamides, sugar ethers, sugar amides, etc. Examples of amphoteric surfactants include betaine, phosphatidylcholine, aminocarboxylates, imidazoline derivatives, and amidoamine types.

[0041] Among these surfactants, it is preferable that they are linear or branched organopolysiloxanes having polyoxyalkylene chains or polyglycerin chains in the molecule, or linear or branched organopolysiloxanes further having long-chain alkyl groups having 6 to 20 carbon atoms. Furthermore, in these surfactants, it is preferable that the content of hydrophilic polyoxyalkylene groups or polyglycerin residues accounts for 10 to 85% by mass of the molecule.

[0042] When surfactants are included, the amount is preferably 0.1 to 20% by mass, and more preferably 0.2 to 10% by mass, in the cosmetic composition.

[0043] The cosmetic composition of the present invention may contain one or more powders depending on its purpose. Any powder commonly used in cosmetics can be used, regardless of its shape (spherical, needle-shaped, plate-shaped, etc.), particle size (fuzzy, fine particles, pigment-grade, etc.), or particle structure (porous, non-porous, etc.), and one or more powders may be used. Examples of powders include inorganic powders, organic powders, surfactant metal salt powders, colored pigments, pearl pigments, metal powder pigments, tar dyes, and natural pigments.

[0044] Specifically, inorganic powders include, for example, titanium dioxide (INCI), zirconium dioxide (INCI), zinc oxide (INCI), cerium oxide (INCI), magnesium oxide (Magnesium Oxide), barium sulfate (Barium Sulfate), calcium sulfate (Calcium Sulfate), magnesium sulfate (Magnesium Sulfate), calcium carbonate (Calcium Carbonate), magnesium carbonate (Magnesium Carbonate), talc (INCI), mica (INCI), kaolin (INCI), sericite (Sericite), titanium mica (Titanate Mica), silica (INCI), hydrated silica (INCI), aluminum silicate (INCI), and magnesium silicate (INCI). Examples include silicate, magnesium aluminum silicate (INCI), calcium silicate (INCI), hydroxyapatite (INCI), bentonite (INCI), montmorillonite (INCI), hectorite (INCI), zeolite (INCI), alumina (INCI), aluminum hydroxide (INCI), and boron nitride (INCI).

[0045] Examples of organic powders include polyamide, polyester, polyethylene (INCI: Polyethylen), polypropylene (INCI: Polypropylene), polystyrene (INCI: Polystyrene), polyurethane, polymethyl methacrylate (INCI: Polymethyl Methacrylate), cellulose (INCI: Cellulose), silk, nylon, and silicone (INCI: Vinyl Dimethicone / Methicone Crosspolymer, Polymethylsilsesquioxane, Vinyl Dimethicone / Methicone Silsesquioxane Crosspolymer, Diphenyl Dimethicone / Vinyl Diphenyl Dimethicone / Silsesquioxane Crosspolymer, Polysilicone-1 Crosspolymer, Polysilicone-22).

[0046] Examples of surfactant metal salt powders (metal soaps) include zinc stearate (INCI), aluminum stearate, calcium stearate, magnesium stearate, zinc myristate (INCI), and magnesium myristate.

[0047] Examples of colored pigments include inorganic red pigments such as iron oxide (INCI), iron hydroxide, and iron titanate; inorganic brown pigments such as γ-iron oxide; inorganic yellow pigments such as yellow iron oxide and yellow ochre (INCI); inorganic black pigments such as black iron oxide and carbon black (INCI); inorganic purple pigments such as manganese violet (INCI); inorganic green pigments such as chromium hydroxide green (INCI), chromium oxide green (INCI), and cobalt titanium oxide (INCI); inorganic blue pigments such as iron blue and ultramarine; and synthetic resin powders that are composites of these powders.

[0048] Examples of pearl pigments include titanium dioxide-coated mica, titanium dioxide-coated mica, bismuth oxychloride, titanium dioxide-coated bismuth oxychloride, titanium dioxide-coated talc, fish scale foil, and titanium dioxide-coated colored mica.

[0049] Examples of metal powder pigments include aluminum powder and copper powder (INCI). Examples of tar dyes include Red No. 3 (Erythrosine), Red No. 104 (Phloxine B), Red No. 106 (Acid red), Red No. 201 (Lithol rubine B), Red No. 202 (Lithol rubine BCA), Red No. 204 (Lake red CBA), Red No. 205 (Lithol red), Red No. 220 (Deep maroon), Red No. 226 (Helindone pink CN), Red No. 227 (Fast acid magenta), Red No. 228 (Parmatone red), Red No. 230 (Eosine YS), Red No. 401 (Violamine R), Red No. 505 (Oil red XO), Yellow No. 4 (Tartrazin), Yellow No. 5 (Sunset yellow FCF), Yellow No. 202 (Uranine K), Yellow No. 203 (Quinolin yellow WS), and Yellow No. 204 (Quinolin yellow Examples include SS), Yellow 401 (Hanza yellow), Blue 1 (Brilliant blue FCF), Blue 2 (Indigo carmine), Blue 201 (Indigo), Blue 404 (Phtalocyanine blue), Green 3 (Fast green FCF), Green 201 (Alizanine cyanine green F), Green 204 (Pyranine conc), Green 205 (Light green SF yellowish), Orange 201 (Dibromofluorescein), Orange 203 (Permanent orange), Orange 204 (Benzidine orange G), Orange 206 (Dioodofluorescein), Orange 207 (Erlthrosine yellowish NA), etc.

[0050] Examples of natural pigments include cochineal, laccaic acid (INCI), carthamin, brazilin, and crocin.

[0051] Furthermore, these powders can also be compounded or treated with general oils, silicone oils, fluorine compounds, surfactants, etc., and may also be used as needed, such as those treated with alkyl groups having hydrolyzable silyl groups or hydrogen atoms directly bonded to silicon atoms, linear and / or branched organopolysiloxanes having hydrolyzable silyl groups or hydrogen atoms directly bonded to silicon atoms, linear and / or branched organopolysiloxanes having hydrolyzable silyl groups or hydrogen atoms directly bonded to silicon atoms and comodified with long-chain alkyl groups, linear and / or branched organopolysiloxanes having hydrolyzable silyl groups or hydrogen atoms directly bonded to silicon atoms and comodified with polyoxyalkylenes, and acrylic-silicone copolymers having hydrolyzable silyl groups or hydrogen atoms directly bonded to silicon atoms.

[0052] The amount of powder to be added varies depending on the formulation, but it is preferably 0.1 to 95% by mass in the cosmetic composition, and more preferably 1 to 60% by mass.

[0053] The cosmetic composition of the present invention may contain one or more organic ultraviolet absorbers depending on its purpose. Any organic ultraviolet absorber used in ordinary cosmetics, whether solid, semi-solid, or liquid, can be used.

[0054] Specifically, these include homosalate (INCI), octocrylene (INCI), t-butyl methoxydibenzoylmethane (INCI), ethylhexyl salicylate (INCI), diethylamino hydroxybenzoyl hexyl benzate (INCI), oxybenzone-6 (INCI), oxybenzone-9 (INCI), oxybenzone-1 (INCI), polysilicone-15 (INCI), and octyl dimethoxybenzylidene dioxoimidazolidine propionate (INCI). Propionate), oxybenzone-2 (INCI: Benzophenone-2), terephthalylidene dicamphor sulfonic acid (INCI: Terephthalylidene Dicamphor Sulfonic Acid), ethylhexyl triazone (INCI), methyl bis(trimethylsiloxy)silylisopentyl trimethoxycinnamate (INCI: Isopentyl Trimethoxycinnamate Trisiloxane), drometrizole trisiloxane (INCI), ethylhexyl dimethyl PABA (INCI: Ethylhexyl Dimethyl PABA), isopropyl paramethoxycinnamate (INCI: Isopropyl Methoxycinnamate), ethylhexyl methoxycinnamate (INCI: Ethylhexyl Methoxycinnamate), bis-ethylhexyloxyphenol methoxyphenyl triazine (INCI: Bis-Ethylhexyloxyphenol MethoxyphenylTriazine, oxybenzone-3 (INCI:Benzophenone-3), oxybenzone-4 (INCI:Benzophenone-4), oxybenzone-5 (INCI:Benzophenone-5), phenylbenzimidazole sulfonic acid (INCI:Phenylbenzimidazole Sulfonic Acid), methylene bis-benzotriazolyl tetramethylbutylphenol (INCI:Methylene Bis-Benzotriazolyl Tetramethylbutylphenol), glyceryl ethylhexanoate (INCI:Glyceryl Ethylhexanoate Dimethoxycinnamate), glyceryl PABA (INCI:Glyceryl PABA), methyl diisopropylcinnamate (INCI:Diisopropyl Methyl Cinnamate), cinoxate (INCI), ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate (INCI:Ethylhexyl Dimethoxybenzylidene Dioxoimidazolidine Examples include propionate.

[0055] It is possible to use UVA absorbers (e.g., diethylamino hydroxybenzoyl hexyl benzoate (INCI)) and UVB absorbers (e.g., ethylhexyl methoxycinnamate (INCI)) in combination, and it is also possible to combine them in any desired way.

[0056] The amount of organic UV absorbers used in a cosmetic composition varies depending on the formulation, but 0.1 to 30% by mass is preferred.

[0057] The cosmetic composition of the present invention may contain appropriate amounts of any other components besides those listed above, as long as they do not impair the effects of the present invention. Examples of optional components include the following:

[0058] • Compounds having an alcoholic hydroxyl group in their molecular structure Depending on the purpose, the cosmetic composition of the present invention may contain one or more compounds having alcoholic hydroxyl groups in their molecular structure. Examples of compounds having alcoholic hydroxyl groups that can be added in the present invention include lower alcohols such as ethanol (INCI: Alcohol) and isopropanol (INCI: Isopropyl Alcohol), sugar alcohols such as sorbitol (INCI) and maltose (INCI), sterols such as cholesterol (INCI), sitosterol (INCI: Beta-Sitosterol), phytosterol (INCI), and lanosterol (INCI), and polyhydric alcohols such as butylene glycol (INCI), propylene glycol (INCI), dibutylene glycol, and pentylene glycol (INCI).

[0059] When a compound having an alcoholic hydroxyl group in its molecular structure is included, the amount is preferably 0.1 to 98% by mass in the cosmetic composition.

[0060] • Water-soluble or water-swellable polymer compounds Depending on the purpose, the cosmetic composition of the present invention may contain one or more water-soluble or water-swellable polymer compounds. For example, gum arabic (INCI: Acacia Senegal Gum), tragacanth gum (INCI: Astragalus Gummifer Gum), galactan, carob gum, guar gum (INCI: Cyamopsis Tetragonoloba (Guar) Gum), karaya gum (INCI: Sterculia Urens Gum), carrageenan (INCI: Chondrus Crispus (Carrageenan)), pectin (INCI), agar (INCI: Agar), quince seed (INCI: Pyrus Cydonia Seed), rice starch (INCI: Oryza Sativa (Rice) Starch), wheat starch (INCI: Triticum Vulgare (Wheat) Starch), potato starch (INCI: Solanum Tuberosum (Potato)) Plant-derived polymers such as starch, corn starch, algae colloids, trant gum (INCI: Astragalus Gummifer Gum), locust bean gum, xanthan gum (INCI), dextran (INCI), succinoglycan (INCI), pullulan (INCI), animal-derived polymers such as collagen (INCI), casein (INCI), albumin (INCI), gelatin (INCI), starch-based polymers such as sodium carboxymethyl starch (INCI), hydroxypropyl starch (INCI), methylcellulose (INCI), ethylcellulose (INCI), methylhydroxypropylcellulose (INCI), carboxymethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose (INCI), nitrocellulose (INCI), sodium cellulose sulfate (INCI), sodium carboxymethylcellulose, crystalline cellulose (INCI)Examples include cellulose, cellulose-based polymers such as cellulose powder, alginate-based polymer compounds such as sodium alginate (INCI: Algin) and propylene glycol alginate (INCI: Propylene Glycol Alginate), vinyl-based polymer compounds such as polyvinyl methyl ether and carboxyvinyl polymer, polyoxyethylene-based polymer compounds and polyoxyethylene polyoxypropylene copolymer polymers, acrylic polymers such as sodium polyacrylate (INCI: Sodium Polyacrylate), polyethyl acrylate (INCI: Polyethylacrylate), polyacrylamide (INCI), and acryloyldimethyl taurate copolymer, other synthetic water-soluble polymers such as polyethyleneimine and cationic polymers, and inorganic water-soluble polymers such as bentonite (INCI), magnesium aluminum silicate (INCI: Magnesium Aluminum Silicate), montmorillonite (INCI), bydelite, nontronite, saponite, hectorite (INCI), and anhydrous silicic acid. Furthermore, these water-soluble polymer compounds also include film-forming agents such as polyvinyl alcohol (INCI) and polyvinylpyrrolidone (INCI).

[0061] When incorporating water-soluble or water-swellable polymer compounds, the amount is preferably 0.1 to 25% by mass in the cosmetic composition.

[0062] The cosmetic composition of the present invention may use one or more silicone resins depending on its purpose. Preferably, the silicone resin is an acrylic / silicone graft or block copolymer acrylic silicone resin. Alternatively, an acrylic silicone resin containing one or more selected from pyrrolidone moieties, long-chain alkyl moieties, polyoxyalkylene moieties, fluoroalkyl moieties, and anionic moieties such as carboxylic acids may be used.

[0063] Furthermore, this silicone resin is R3SiO 1 / 2 Units and SiO 4 / 2 A resin composed of units, R3SiO 1 / 2Units and R2SiO 2 / 2 Units and SiO 4 / 2 A resin composed of units, R3SiO 1 / 2 Units and RSiO 3 / 2 A resin composed of units, R3SiO 1 / 2 Units and R2SiO 2 / 2 Units and RSiO 3 / 2 A resin composed of units, R3SiO 1 / 2 Unit: R2SiO 2 / 2 Unit, RSiO 3 / 2 Units and SiO 4 / 2 It is preferable that the silicone network compound is composed of a resin made up of units (where R represents a monovalent organic group). Alternatively, a silicone network compound containing one or more selected from pyrrolidone moiety, long-chain alkyl moiety, polyoxyalkylene moiety, fluoroalkyl moiety, and amino moiety in its molecule may be used. Furthermore, silicone-modified pullulan or silicone-modified norbornene may be used as the silicone resin.

[0064] When silicone resin is incorporated, the amount is preferably 0.1 to 20% by mass, and more preferably 1 to 10% by mass, in the cosmetic composition.

[0065] Depending on the purpose, the cosmetic composition of the present invention may contain a composition comprising one or more cross-linked organopolysiloxanes and a liquid oil at room temperature. It is preferable that the cross-linked organopolysiloxane swells when it contains liquid oil exceeding its own weight. Examples of liquid oils include the aforementioned liquid silicone oils, hydrocarbon oils, ester oils, natural animal and vegetable oils, semi-synthetic oils, fluorinated oils, etc. For example, a liquid oil with a kinematic viscosity of 0.65 mmHg at 25°C, as measured by a Cannon-Fenske viscometer as described in JIS Z 8803:2011, is suitable. 2 / s~100.0mm 2Examples include low viscosity silicone oils with a viscosity of / s, liquid paraffin, hydrocarbon oils such as squalane, isododecane, and isohexadecane, glyceride oils such as trioctanoin, ester oils such as isotridecyl isononanoate, N-acyl glutamate, and lauroyl sarcosinate, and natural animal and vegetable oils such as macadamia nut oil. Furthermore, it is preferable that the crosslinking agent of this crosslinked organopolysiloxane has two or more vinyl reaction sites in its molecule and forms a crosslinked structure by reacting with hydrogen atoms directly bonded to silicon atoms. Examples of substances having two or more vinyl reaction sites in their molecule include organopolysiloxanes having two or more vinyl groups in their molecule, polyoxyalkylenes having two or more allyl groups in their molecule, polyglycerin having two or more allyl groups in its molecule, and α,ω-alkenyldienes.

[0066] Furthermore, a cross-linked organopolysiloxane can also be used, which contains at least one selected from the group consisting of a polyoxyalkylene moiety, a polyglycerin moiety, a long-chain alkyl moiety, an alkenyl moiety, an aryl moiety, and a fluoroalkyl moiety in the cross-linked molecule.

[0067] When a composition comprising a cross-linked organopolysiloxane and a liquid oil at room temperature is incorporated, the amount is preferably 0.1 to 80% by mass, and more preferably 1 to 50% by mass, in the cosmetic composition.

[0068] The cosmetic composition of the present invention may contain one or more types of silicone wax, depending on its purpose. The silicone wax is a silicone-modified olefin wax obtained by an addition reaction between an olefin wax having an unsaturated group consisting of an α-olefin and a diene, and an organohydrogenpolysiloxane having one or more hydrosilyl groups per molecule. As the α-olefin of the olefin wax, α-olefins having 2 to 12 carbon atoms, such as ethylene, propylene, 1-butene, 1-hexene, and 4-methyl-1-pentene, are preferred, and as the diene, butadiene, isoprene, 1,4-hexadiene, vinylnorbornene, ethylidenenorbornene, and dicyclopentadiene are preferred. The organohydrogenpolysiloxane having a hydrosilyl group can be in the form of a linear or siloxane-branched structure.

[0069] Furthermore, the cosmetic composition of the present invention may contain ingredients commonly used in cosmetics, such as oil-soluble gelling agents, antiperspirants, moisturizers, antibacterial and preservative agents, antimicrobial agents, fragrances, salts, antioxidants, pH adjusters, chelating agents, cooling agents, anti-inflammatory agents, skin beautifying ingredients (whitening agents, cell activators, skin roughness improving agents, blood circulation promoting agents, skin astringents, anti-seborrheic agents, resins, etc.), vitamins, amino acids, nucleic acids, hormones, hair solidifying agents, etc.

[0070] Examples of oil-soluble gelling agents include metal soaps such as aluminum stearate, magnesium stearate (INCI), and zinc myristate (INCI); amino acid derivatives such as N-lauroyl-L-glutamic acid (INCI) and α,γ-di-n-butylamine; dextrin fatty acid esters such as dextrin palmitate (INCI), dextrin stearate (INCI), and dextrin palmitate / ethylhexanoate (INCI); sucrose palmitate (INCI); and sucrose stearate (INCI). Examples of gelling agents include sucrose fatty acid esters such as stearate, fructooligosaccharide fatty acid esters such as fructooligosaccharide stearate and fructooligosaccharide 2-ethylhexanoate, benzylidene derivatives of sorbitol such as monobenzylidene sorbitol and dibenzylidene sorbitol, and organically modified clay minerals such as dimethylbenzylddecylammonium montmorillonite clay and dimethyldioctadecylammonium montmorillonite clay. In the cosmetic composition of the present invention, sufficient effects can be obtained even without incorporating these oil-soluble gelling agents.

[0071] Examples of antiperspirants include aluminum chlorohydrate (INCI), aluminum chloride (INCI), aluminum sesquichlorohydrate, zirconyl hydroxychloride, aluminum zirconium hydroxychloride, and aluminum zirconium glycine complex.

[0072] Examples of humectants include glycerin, sorbitol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, pentylene glycol, glucose, xylitol, maltitol, polyethylene glycol, hyaluronic acid, chondroitin sulfate, pyrrolidone carboxylate, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, egg yolk lecithin, soy lecithin, phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol, phosphatidylinositol, sphingophospholipids, and the like.

[0073] Examples of antimicrobial and preservative agents include alkyl parahydroxybenzoate, benzoic acid (INCI), sodium benzoate (INCI), sorbic acid (INCI), potassium sorbate (INCI), and phenoxyethanol (INCI). Examples of antibacterial agents include benzoic acid, salicylic acid, carbolic acid (INCI), sorbic acid, alkyl parahydroxybenzoate, parachlormethacresol (INCI), hexachlorophene (INCI), benzalkonium chloride (INCI), chlorhexidine chloride (INCI), trichlorocarbanilide, photosensitizer, and phenoxyethanol.

[0074] Examples of fragrances include natural and synthetic fragrances. Natural fragrances include plant-derived fragrances isolated from flowers, leaves, wood, fruit peels, etc., and animal-derived fragrances such as musk and civet. Synthetic fragrances include hydrocarbons such as monoterpenes; alcohols such as aliphatic alcohols and aromatic alcohols; aldehydes such as terpene aldehydes and aromatic aldehydes; ketones such as alicyclic ketones; esters such as terpene esters; lactones; phenols; oxides; nitrogen-containing compounds; acetals, etc.

[0075] Examples of salts include inorganic salts, organic acid salts, amine salts, and amino acid salts. Examples of inorganic salts include sodium salts, potassium salts, magnesium salts, calcium salts, aluminum salts, zirconium salts, and zinc salts of inorganic acids such as hydrochloric acid, sulfuric acid, carbonic acid, and nitric acid; examples of organic acid salts include salts of organic acids such as acetic acid (INCI), dehydroacetic acid (INCI), citric acid (INCI), malic acid (INCI), succinic acid (INCI), ascorbic acid (INCI), and stearic acid (INCI); examples of amine salts and amino acid salts include salts of amines such as triethanolamine (INCI) and salts of amino acids such as glutamic acid. In addition, other substances such as hyaluronic acid (INCI), salts of chondroitin sulfate, aluminum zirconium glycine complexes, and even acid-alkali neutralization salts used in cosmetic formulations can also be used.

[0076] Antioxidants include, for example, tocopherol (INCI), pt-butylphenol, butylhydroxyanisole (INCI), dibutylhydroxytoluene (INCI), phytic acid, etc. pH adjusters include, for example, lactic acid (INCI), citric acid (INCI), glycolic acid (INCI), succinic acid (INCI), tartaric acid (INCI), dl-malic acid (INCI), potassium carbonate (INCI), sodium bicarbonate (INCI), ammonium bicarbonate (INCI), etc. Chelating agents include, for example, alanine (INCI), sodium edetate, sodium polyphosphate (INCI), sodium metaphosphate (INCI) Examples of cooling agents include metaphosphate, phosphoric acid, L-menthol, camphor, etc., and anti-inflammatory agents include allantoin (INCI), glycyrrhizic acid (INCI) and its salts, glycyrrhetinic acid (INCI) and stearyl glycyrrhetinate (INCI), tranexamic acid, azulene (INCI), etc.

[0077] Ingredients for beautiful skin include, for example, whitening agents such as placenta extract, arbutin (INCI), glutathione (INCI), and Saxifraga sarmentosa extract (INCI); cell activators such as royal jelly (INCI), photosensitizers, cholesterol derivatives, and calf blood extract; skin roughness improving agents; nonylic acid vanenylamide, benzyl nicotinate (INCI), β-butoxyethyl nicotinate, capsaicin (INCI), gingerol, cantharis tincture, ichthammol (INCI), caffeine (INCI), tannic acid (INCI), α-borneol (INCI), and tocopheryl nicotinate (INCI). Examples include blood circulation promoters such as nicotinate, inositol hexanicotinate, cyclandelate, cinnarizine, trazoline, acetylcholine, verapamil, cepharanthine, and γ-oryzanol (INCI); skin astringents such as zinc oxide and tannic acid; and anti-seborrheic agents such as sulfur and thianthol.

[0078] Examples of vitamins include vitamin A derivatives such as vitamin A oil, retinol (INCI), retinyl acetate (INCI), and retinyl palmitate (INCI); vitamin B2 derivatives such as riboflavin (INCI), riboflavin butyrate (INCI), and disodium flavivine adenine dinucleotide (INCI); vitamin B6 derivatives such as pyridoxine hydrochloride, pyridoxine dioctanoate, and pyridoxine tripalmitate (INCI); vitamin B derivatives such as vitamin B12 and its derivatives; vitamin B15 and its derivatives; L-ascorbic acid (INCI), L-ascorbic acid dipalmitate, and sodium L-ascorbic acid-2-sulfate (INCI). Examples include vitamin C compounds such as sulfate and dipotassium L-ascorbic acid phosphate, vitamin D compounds such as ergocalciferol (INCI) and cholecalciferol (INCI), vitamin E compounds such as α-tocopherol (INCI), β-tocopherol (INCI), γ-tocopherol (INCI), dl-α-tocopherol acetate (INCI: Tocopheryl Acetate), dl-α-tocopherol nicotinate (INCI: Tocopheryl Nicotinate), and dl-α-tocopherol succinate (INCI: Tocopheryl Succinate), vitamin H, vitamin P, nicotinic acid compounds such as nicotinic acid, benzyl nicotinate, and nicotinamide, pantothenic acid compounds such as calcium pantothenate, D-pantothenyl alcohol, pantothenyl ethyl ether, and acetyl pantothenyl ethyl ether, and biotin.

[0079] Examples of amino acids include glycine (INCI), valine (INCI), leucine (INCI), isoleucine (INCI), serine (INCI), threonine (INCI), phenylalanine (INCI), arginine (INCI), lysine (INCI), aspartic acid (INCI), glutamic acid (INCI), cystine (INCI), cysteine ​​(INCI), methionine (INCI), and tryptophan (INCI). Examples of nucleic acids include deoxyribonucleic acid, and examples of hormones include estradiol (INCI) and ethenylestradiol (INCI).

[0080] Examples of polymer compounds for hair fixation include amphoteric, anionic, cationic, and nonionic polymer compounds, such as polyvinylpyrrolidone polymers like polyvinylpyrrolidone (INCI) and vinylpyrrolidone / vinyl acetate copolymer (INCI); acidic vinyl ether polymers like methyl vinyl ether / alkyl maleate half-ester copolymer; acidic polyvinyl acetate polymers like vinyl acetate / crotonic acid copolymer; acidic acrylic polymers like (meth)acrylic acid / alkyl (meth)acrylate copolymer and (meth)acrylic acid / alkyl (meth)acrylate / alkylacrylamide copolymer; and amphoteric acrylic polymers like N-methacryloylethyl-N,N-dimethylammonium·α-N-methylcarboxybetaine / alkyl (meth)acrylate copolymer and hydroxypropyl (meth)acrylate / butylaminoethyl methacrylate / octyl acrylate copolymer. Naturally derived polymer compounds such as cellulose or its derivatives, keratin and collagen or their derivatives can also be suitably used.

[0081] [Properties of cosmetics] By including the (meth)acrylic silicone copolymer of the present invention, a cosmetic composition with excellent feel, long-term stability, and adhesion to the skin can be obtained. The form of the cosmetic composition is not particularly limited and can be in the form of powder, oil, water-in-oil emulsion, oil-in-water emulsion, non-aqueous emulsion, W / O / W, O / W / O, or other multi-emulsions. The pH and viscosity are appropriately selected according to the dosage form.

[0082] The viscosity of the cosmetic composition is not particularly limited by the dosage form, but is preferably 1,000 to 300,000 mPa·s, and more preferably 1,000 to 200,000 mPa·s. In this invention, viscosity refers to the value at 25°C measured with a Type B rotational viscometer as described in JIS K7117-1:1999.

[0083] Cosmetics can be formulated in various forms, including liquid, emulsion, cream, solid, paste, gel, powder, pressed, multilayer, mousse, spray, stick, and pencil forms.

[0084] Examples of cosmetics include skincare cosmetics such as liquids, massage creams, serums, beauty oils, cleansers, deodorants, hand creams, lip balms, and wrinkle concealers; makeup cosmetics such as makeup bases, concealers, face powders, powder foundations, liquid foundations, cream foundations, oil-based foundations, blushes, eyeshadows, mascaras, eyeliners, eyebrow products, and lipsticks; hair cosmetics such as shampoos, conditioners, treatments, and styling products; antiperspirants; and UV protection cosmetics such as sunscreen oils, sunscreen lotions, and sunscreen creams. In particular, those containing water and in emulsion form are suitable as makeup bases, liquid foundations, sunscreen lotions, and sunscreen creams. [Examples]

[0085] The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to the following examples. Unless otherwise specified in the following examples, the "%" in the composition is by mass, and the amounts of each component in the table are the amounts converted to pure content.

[0086] [Synthesis of (meth)acrylic monomer (b)] [Synthesis Example 1] 108 g of 1-octadecanol, 20 g of hexane, 0.017 g of BHT (dibutylhydroxytoluene), and 0.009 g of dibutylsulate were charged into a reactor and heated to 60°C. 65.1 g of 2-methacroylethyl isocyanate was added dropwise. After stirring at 70°C for 5 hours, 10 g of methanol was added and stirred for 1 hour, and then cooled, causing a solid to precipitate. This was washed with 800 g of methanol, the precipitate was filtered, and the solvent was removed by distillation under reduced pressure at 50°C for 10 hours. A white solid (melting point 65°C, purity 98% (GPC area%)) of the compound represented by the following formula (4) was obtained in 96% yield. [ka]

[0087] [Synthesis Example 2] 150 g of 1-docosanol, 40 g of hexane, 0.023 g of BHT (dibutylhydroxytoluene), and 0.013 g of dibutylsulate were charged into a reactor and heated to 60°C. 74.9 g of 2-methacroylethyl isocyanate was added dropwise. After stirring at 70°C for 5 hours, 10 g of methanol was added and stirred for 1 hour, then cooled, and a solid precipitated. This was washed with 1,000 g of methanol, the precipitate was filtered, and the solvent was removed by distillation under reduced pressure at 50°C for 10 hours. A white solid (melting point 73°C, purity 98% (GPC area%)) of the compound represented by the following formula (5) was obtained in 97% yield. [ka]

[0088] [Synthesis Example 3] 68.3 g of 2-hydroxyethyl methacrylate, 30 g of toluene, 0.022 g of BHT (dibutylhydroxytoluene), and 0.011 g of dibutylsulate were charged into a reactor and heated to 50°C. 148 g of octadecyl isocyanate was added dropwise. After stirring at 70°C for 5 hours, 10 g of methanol was added and stirred for 1 hour, and then cooled, causing a solid to precipitate. This was washed with 1,000 g of methanol, the precipitate was filtered, and the solvent was removed by distillation under reduced pressure at 50°C for 10 hours. A white solid (melting point 72°C, purity 98% (GPC area%)) of the compound represented by the following formula (6) was obtained in 96% yield. [ka]

[0089] [Comparative Synthesis Example 1] 118 g of 1-dodecanol, 20 g of hexane, 0.021 g of BHT (dibutylhydroxytoluene), and 0.01 g of dibutylsulate were charged into a reactor and heated to 60°C. 96.3 g of 2-methacroylethyl isocyanate was added dropwise. After stirring at 70°C for 5 hours, 10 g of methanol was added and the mixture was stirred for 1 hour. The mixture was washed with 400 g of methanol / 100 g of water, and the solvent was removed by distillation under reduced pressure at 50°C for 5 hours. A compound represented by the following formula (7) was obtained in yield 95% (melting point 42°C, purity 98% (GPC area%)). [ka]

[0090] [Example 1] 10 g of toluene was charged into a reactor and heated to 80°C. 25 g of the compound represented by formula (8) below, 25 g of formula (4) obtained in Synthesis Example 1, 100 g of toluene, and 0.8 g of t-butyl-2-ethylperoxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethylperoxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number-average molecular weight was 23,000. [ka]

[0091] [Example 2] 10 g of toluene was charged into a reactor and heated to 80°C. 17.5 g of the compound represented by formula (9) below, 32.5 g of the compound represented by formula (5) obtained in Synthesis Example 2, 120 g of toluene, and 0.8 g of t-butyl-2-ethylperoxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethylperoxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number-average molecular weight was 18,000. [ka]

[0092] [Example 3] 10 g of toluene was charged into a reactor and heated to 80°C. 30 g of the compound represented by formula (9) below, 20 g of the compound represented by formula (5) obtained in Synthesis Example 2, 120 g of toluene, and 0.8 g of t-butyl-2-ethylperoxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethylperoxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number-average molecular weight was 22,000.

[0093] [Example 4] 10 g of toluene was charged into a reactor and heated to 80°C. 15 g of the compound represented by formula (8), 35 g of the compound represented by formula (6) obtained in Synthesis Example 3, toluene, and 1.0 g of t-butyl-2-ethylperoxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethylperoxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number average molecular weight was 13,000.

[0094] [Example 5] 10 g of toluene was charged into a reactor and heated to 80°C. 20 g of the compound represented by formula (8), 27.5 g of the compound represented by formula (5) obtained in Synthesis Example 2, 2.5 g of methyl methacrylate, 100 g of toluene, and 0.6 g of t-butyl-2-ethylperoxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethylperoxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number-average molecular weight was 29,000.

[0095] [Comparative Example 1] 10 g of toluene was charged into the reactor and heated to 80°C. 7.5 g of the compound represented by formula (8), 42.5 g of the compound represented by formula (4) obtained in Synthesis Example 1, 120 g of toluene, and 0.8 g of t-butyl-2-ethylperoxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethylperoxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number-average molecular weight was 12,000.

[0096] [Comparative Example 2] 10 g of toluene was charged into a reactor and heated to 80°C. 42.5 g of the compound represented by formula (8), 7.5 g of the compound represented by formula (6) obtained in Synthesis Example 3, 100 g of toluene, and 0.8 g of t-butyl-2-ethylperoxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethylperoxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number average molecular weight was 12,000.

[0097] [Comparative Example 3] 10 g of toluene was charged into a reactor and heated to 80°C. 20 g of the compound represented by formula (9), 30 g of the compound represented by formula (7) obtained in comparative synthesis example 1, 100 g of toluene, and 0.8 g of t-butyl-2-ethylperoxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethylperoxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number-average molecular weight was 25,000.

[0098] [Comparative Example 4] 10 g of toluene was charged into a reactor and heated to 80°C. 20 g of the compound represented by formula (8), 17.5 g of the compound represented by formula (5) obtained in Synthesis Example 2, 12.5 g of methyl methacrylate, 100 g of toluene, and 0.8 g of t-butyl-2-ethyl peroxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethyl peroxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number-average molecular weight was 19,000.

[0099] [Comparative Example 5] 10 g of toluene was charged into a reactor and heated to 80°C. 25 g of the compound represented by formula (8), 25 g of stearyl methacrylate, 100 g of toluene, and 0.8 g of t-butyl-2-ethyl peroxyhexanoate were mixed and added dropwise over 2 hours. After the dropwise addition, the mixture was reacted for 2 hours, then 0.2 g of t-butyl-2-ethyl peroxyhexanoate was added, the temperature was raised to 100°C, and the mixture was stirred for 3 hours. The solvent was then removed by distillation under reduced pressure (400 Pa) at 120°C to obtain the target copolymer. The number-average molecular weight was 21,000.

[0100] The viscosity-enhancing properties of the (meth)acrylic silicone copolymers obtained in Examples 1-5 were evaluated. [Sample preparation] The four types of oils listed in the table below were mixed at a concentration of 10% by mass, dissolved at 80°C, and then visually inspected at room temperature. In Table 1 below, "Gelled" indicates a gelled appearance after storage at room temperature, "Liquid" indicates a transparent or slightly cloudy liquid, and "Separated" indicates two layers separated due to incompatibility.

[0101] [Table 1]

[0102] As is clear from the results above, Examples 1-4, consisting of components (a) and (b), and Example 5, consisting of components (a) and (b) and 5% by mass of component (c), were found to thicken and gel silicone oil, ester oil, and hydrocarbon oil. In contrast, Comparative Examples 1 and 2 showed poor balance for each oil, either gelling or separating depending on the mass percentage of components (a) and (b). In Comparative Example 3, no thickening effect was obtained when the alkyl chain length of component (b) was short, and in Comparative Example 4, no thickening effect was obtained even when component (c) was too high at 25% by mass. Furthermore, in Comparative Example 5, no thickening effect was obtained and the mixture dissolved when component (b) did not contain urea or urethane bonds. Thus, it was found that the (meth)acrylic silicone copolymer of the present invention has the ability to thicken various oils.

[0103] [Examples 6-15, Comparative Examples 6-11] Water-in-oil emulsions were prepared with the compositions shown in Tables 2 and 3. These were filled into 30 mL vials, and their appearance was visually inspected after 7 days at 50°C. The stability over time was evaluated by the change in viscosity compared to the initial emulsification stage. Viscosity was measured at 25°C using a Type B rotational viscometer as described in JIS K7117-1:1999. After storage, the temperature was maintained at 25°C for measurement.

[0104] [Table 2] (Note 1) KF-6017 (INCI: PEG-9 DIMETHICOME) manufactured by Shin-Etsu Chemical Co., Ltd.

[0105] [Table 3] (Note 1) KF-6017 (INCI: PEG-9 DIMETHICOME) manufactured by Shin-Etsu Chemical Co., Ltd.

[0106] [Emulsion preparation method] a: Components 1-11 were stirred and mixed. b: Components 12-14 were stirred and mixed. The mixture obtained in c:b was added to the mixture obtained in a and stirred to emulsify.

[0107] Examples 6-15, regardless of the type of oil, showed no emulsion separation even after 7 days at 50°C, minimal viscosity change, and excellent long-term stability. In contrast, Comparative Examples 6-11 had low initial viscosity, slight emulsion separation over time, decreased viscosity, and poor long-term stability.

[0108] [Example 16: Lipstick] [Table 4] (Note 1) KP-550 manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: ACRYLATES / DIMETHICONE COPOLYMER, ISODODECANE) (Manufacturing method) a: Components 1-7 were heated and mixed. b: Components 9-17 were mixed uniformly. c:8 was added to the mixture obtained in b and mixed. d: Under heating, the mixture obtained in a was mixed with the mixture obtained in c. The resulting lipstick spread smoothly, felt light and blended well with the skin, had a good shine, and also exhibited excellent water resistance and water repellency, resulting in long-lasting makeup.

[0109] [Example 17: Water-soluble cream foundation] [Table 5] (Note 1) KSG-210 manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: DIMETHICONE / PEG-10 / 15 CROSSPOLYMER, DIMETHICON) (Note 2) KF-6038 (INCI: LAURYL PEG-9 POLYDIMETHYLSILOXYETHYL DIMETHICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 3) KF-56A (INCI: DIPHENYL SILOXYPHENYL TRIMETHICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 4) KF-6105 manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: LAURYL POLYGLYCERYL-3 POLYDIMETHYLSILOXYETHYL DIMETICONE) (Note 5) Shin-Etsu Chemical Co., Ltd. KTP-09W (INCI: TITANIUM DIOXIDE, ALUMINUM HYDROXIDE, TRIETHOXYSILYLETHYL POLYDIMETHYLSILOXYETHYL HEXYL DIMETICONE) (Note 6) KTP-09R (INCI: IRON OXIDES, TRIETHOXYSILYLETHYL POLYDIMETHYLSILOXYETHYL HEXYL DIMETICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 7) KTP-09Y (INCI: IRON OXIDES, TRIETHOXYSILYLETHYL POLYDIMETHYLSILOXYETHYL HEXYL DIMETICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Manufacturing method) a: Components 1-8 were stirred and mixed. b: Components 9-14 were stirred and mixed. c: Components 15-18 were uniformly mixed. The mixture obtained in d:c was added to the mixture obtained in a and emulsified by stirring. The mixture obtained in e:b was added to the mixture obtained in d and stirred and mixed. The resulting W / O type cream foundation had good spreadability, was non-greasy, and had excellent usability. Furthermore, it remained stable without separating over time and offered excellent makeup longevity.

[0110] [Example 18: Water-soluble sunscreen lotion] [Table 6] (Note 1) KSG-210 manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: DIMETHICONE / PEG-10 / 15 CROSSPOLYMER, DIMETHICON) (Note 2) KF-6028 (INCI: PEG-9 POLYD) manufactured by Shin-Etsu Chemical Co., Ltd. IMETHYLSILOXYETHYL DIMETHICONE) (Note 3) KF-56A (INCI: DIPHENYL SILOXYPHENYL TRIMETHICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 4) KF-6115 manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: LAURYL POLYGLYCERYL-3 POLYDIMETHYLSILOXYETHYL DIMETICONE) (Note 6) MT-100TV manufactured by Teika Co., Ltd. (Note 7) MZX-508TS manufactured by Teika Co., Ltd. (Manufacturing method) a: Components 1-9 were thoroughly mixed using a homodisperser until homogeneous. b: After uniformly mixing components 10-13, add them to a and stir to form an emulsion. The resulting W / O type sunscreen lotion spread easily, was non-greasy, and had excellent usability. Furthermore, it remained stable without separating over time and exhibited excellent makeup longevity.

[0111] [Example 19: Water-based sunscreen cream] [Table 7] (Note 1) KSG-240 manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: DIMETHICONE / PEG-10 / 15 CROSSPOLYMER, CYCLOPENTASILOXANE) (Note 2) KF-6038 (INCI: LAURYL PEG-9 POLYDIMETHYLSILOXYETHYL DIMETHICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 4) KF-56A (INCI: DIPHENYL SILOXYPHENYL TRIMETHICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 5) KSP-300 manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: Diphenyl Dimethicone / Vinyl Diphenyl Dimethicone / Silesquioxane Crosspolymer) (Note 5) Manufactured by Shin-Etsu Chemical Co., Ltd. SPD-T5 (INCI: CYCLOPENTASILOXANE / TITANIUMU DIOXIDE / POLYGLYCERYL-3 POLYDIMETHYLSILOXYETHYL DIMETICONE / ALUMINUM HYDROXIDE / STEARIC ACID)

[0112] (Manufacturing method) a: Components 1-11 were stirred and mixed. b: Components 13-17 were stirred and mixed. The mixture obtained in c:b was added to the mixture obtained in a and stirred to create an emulsified mixture. 12 was added to the mixture obtained in d:c and stirred and mixed. The resulting W / O type sunscreen cream spread easily, was non-greasy, and had excellent usability and stability. Furthermore, it remained stable without separating over time, resulting in excellent makeup longevity.

[0113] [Example 20: W / O type eyeliner] [Table 8] (Note 1) KF-6017 (INCI: PEG-10 DIMETHICOME) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 2) KF-6038 (INCI: LAURYL PEG-9 POLYDIMETHYLSILOXYETHYL DIMETHICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 3) KF-9021 manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: TRIMETHYLSILOXYSILICATE, CYCLOPENTASILOXANE) (Note 4) KTP-09B (INCI: IRON OXIDES, TRIETHOXYSILYLETHYL POLYDIMETHYLSILOXYETHYL HEXYL DIMETICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Manufacturing method) a: Mix ingredients 1-8. b: Components 9-12 were mixed uniformly. c: The mixture obtained in a was added to the mixture obtained in b and stirred to form an emulsion. The resulting W / O type eyeliner had good spreadability, a smooth texture, blended well with the skin, and possessed excellent water resistance and ease of use. Furthermore, it remained stable without separating over time, resulting in excellent makeup longevity.

[0114] [Example 21: O / W type cream] [Table 9] (Note 1) KSG-18A manufactured by Shin-Etsu Chemical Co., Ltd. (INCI: DIMETHICONE / PHENYL VINYL DIMETHICON CROSSPOLYMER, DIPHENYL SILOXYPHENYL TRIMETHICONE) (Note 2) Metroze SM-4000, manufactured by Shin-Etsu Chemical Co., Ltd. (Note 3) SEPIC Sepigel 305 (Manufacturing method) a: Mix ingredients 4-9. b: Mix components 1-3, add the mixture obtained in a, and stir until emulsified. The resulting oil-based cream had a light, non-greasy, and refreshing feel, without any stickiness or oiliness. Furthermore, it remained stable over time without separating, demonstrating excellent makeup longevity.

[0115] [Example 22: O / W type sunscreen cream] [Table 10] (Note 1) KF-6013 (INCI: PEG-9 DIMETHICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 2) MZX-508OTS manufactured by Teika Co., Ltd. (Note 3) KF-6100 (INCI: POLYGLYCERYL-3 DISILOXANE DIMETICONE) manufactured by Shin-Etsu Chemical Co., Ltd. (Note 4) STR-100W-OTS manufactured by Sakai Chemical Industry Co., Ltd.

[0116] (Manufacturing method) a: Mix ingredients 6-8. b: Components 9 and 10 were mixed with a portion of component 13. c: Components 4-5 were added to components 1-3 to prepare a gel-like substance. The gel-like substance obtained in d:c was added to the mixture obtained in a and stirred. Components 11, 12, and the remaining 13 were added to the mixture obtained in e:d and emulsified. The emulsion obtained in d:e and the mixture obtained in b were added. The resulting oil-based sunscreen cream spread easily, was refreshing, smooth, and non-greasy, offering excellent usability. Furthermore, it remained stable without separating over time, resulting in superior makeup longevity.

[0117] Based on the above, the novel (meth)acrylic silicone copolymer of the present invention exhibits excellent viscosity-enhancing properties for various oils and silicone oils, and when incorporated into cosmetics, it provides a good feel, adherence to the skin, and excellent cosmetic durability and long-term stability. Furthermore, the present invention is not limited to the embodiments described above. The embodiments described above are illustrative, and any configuration that is substantially identical to the technical idea described in the claims of the present invention and achieves similar effects is included within the technical scope of the present invention.

Claims

1. A monomer copolymer comprising more than 80% by mass of the following (meth)acrylic polymerizable monomers (a) and (b), wherein the number average molecular weight is 5,000 to 500,000 (meth)acrylic silicone copolymer. (a) Formula (1) below: 20 to 80% by mass 【Chemistry 1】 (In the formula, R 1 X is a hydrogen atom or a methyl group, X is a linear or branched divalent hydrocarbon group having 1 to 10 carbon atoms, R 2 (where n is a monovalent hydrocarbon group having 1 to 10 carbon atoms, and n is 0 to 100.) monomers represented by (b) Formula (2) below: 20 to 80% by mass 【Chemistry 2】 (In the formula, R 1 X is the same as above, R 3 Y is a monovalent hydrocarbon group having 18 to 30 carbon atoms. 1 and Y 2 Each of these is independently either NH or O, and at least one of them is NH. monomers represented by

2. Furthermore, the following equation (3) 【Transformation 3】 (In the formula, R 1 , Y 1 are the same as above, R 4 is a hydrogen atom, a linear or branched monovalent hydrocarbon group having 1 to 22 carbon atoms, a hydroxyalkyl group having 1 to 5 carbon atoms, -(C m H 2m O) a R 5 (m is 2 to 4, a is 1 to 20, R 5 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms), and a group selected from a polyoxyalkylene group and a glyceryl group. ) The (meth)acrylic silicone copolymer according to claim 1, which is a monomer copolymer containing 0.1% by mass or more and less than 20% by mass of the (meth)acrylic polymerizable monomer (c) represented.

3. A cosmetic composition comprising 0.1 to 20% by mass of the (meth)acrylic silicone copolymer according to claim 1 or 2.

4. The cosmetic composition according to claim 3, wherein the cosmetic composition comprises one or more oils selected from silicone oil, hydrocarbon oil, ester oil, glyceride oil, natural animal and vegetable oils and fats and semi-synthetic oils and higher alcohols.

5. The cosmetic composition according to claim 3, further comprising a powder.

6. The cosmetic composition according to claim 3, further comprising water and a surfactant, and in the form of an emulsion.

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