Abstract: To provide a water-in-oil emulsified composition which highly encapsulates a water content, has high viscosity, and is excellent in emulsification stability. The water-in-oil emulsified composition of the present disclosure comprises a dispersion medium comprising an oil content, and an oil-soluble copolymer having a monomer unit obtained from a specific hydrophilic monomer, and a monomer unit obtained from a specific hydrophobic monomer; and water droplets dispersed in the dispersion medium, wherein the oil content contains 60% by mass or more of polar oil with an IOB of 0.10 or more, and wherein the water droplets contain water and a surfactant, and the content of the water is 30% by mass or more based on the total amount of the composition.

Abstract: A method of thickening cosmetics containing a crosslinked water-swellable polymer, or a microgel obtained by pulverizing a hydrophilic compound having gelation ability. The method comprises adding a linear polyacrylic acid or a salt thereof, or a linear poly(2-acrylamido-2-methylpropanesulfonic acid) or a salt thereof, having a weight-average molecular weight of 500,000 to 8,000,000, which has a thread length of 10 mm or less at room temperature when formed into a 1% by mass solution. The method provides cosmetics having an improved viscoelastic ratio, with a rich and full-bodied feeling upon application.

Abstract: Aqueous compositions can be thickened without increasing stringiness, by using polymers of polyacrylic acid, poly(2-acryamide-2-methylpropanesulfonate), or salts thereof, having a weight average molecular weights of 500,000 to 8,000,000 as thickeners. The polymers contain no more than 10 mass % of polymers having a molecular weight of 10,000,00 or more, and/or contain no more than 10 mass % of polymers having more than three times the weight average molecular weight. Aqueous solutions of these polymers exhibit a low degree of stringiness, and are particularly useful as thickeners for cosmetics.

Abstract: Provided is an elastomer that improves the skin feel of an inorganic powder. The elastomer according to the present invention is an elastomeric mixture comprising an amino group-containing silicone polymer and a carboxyl group-containing silicone polymer or a carboxyl group-containing acrylamide polymer. The molar ratio of amino groups to carboxyl groups in the mixture is within the range of 0.1 to 1.2.

Abstract: Provided is an elastomer that improves the skin feel of an inorganic powder. The elastomer according to the present invention is an elastomer comprising: (A) an amino group-containing silicone polymer; and (B) a carboxyl group-containing silicone polymer or a carboxyl group-containing acrylamide polymer, wherein a molar ratio Y/X between amino groups and carboxyl groups is within a range of 0.1 to 1.2, wherein Y denotes the molar amount of carboxyl groups contained in the component (B), and X denotes the molar amount of amino groups contained in the component (A).

Abstract: An object of the present invention is to provide a water-in-oil emulsified cosmetic having improved feeling on use and usability. A water-in-oil emulsified cosmetic characteristic by comprising the following components (a) to (d): (a) one or more polymers selected from the group consisting of polyacrylic acid, a salt of polyacrylic acid, poly(2-acrylamido-2-methylpropanesulfonic acid), and a salt of poly(2-acrylamido-2-methylpropanesulfonic acid) and having a weight average molecular weight of 1 million to 4 million, and a viscosity at 25° C. when made into a 1% by mass aqueous solution of 1 Pa·s or less, (b) an aqueous phase component other than the component (a) (c) 60% by mass or less of an oily component, and (d) an emulsifier.

Abstract: Provided is an elastomer that improves the skin feel of an inorganic powder. The elastomer according to the present invention is an elastomer comprising: (A) an amino group-containing silicone polymer; and (B) a carboxyl group-containing silicone polymer or a carboxyl group-containing acrylamide polymer, wherein a molar ratio Y/X between amino groups and carboxyl groups is within a range of 0.1 to 1.2, wherein Y denotes the molar amount of carboxyl groups contained in the component (B), and X denotes the molar amount of amino groups contained in the component (A).

Abstract: A cosmetic includes a component (a) and (b): wherein component (a) is a polyacrylic acid or a salt thereof or poly(2-acrylamido-2-methylpropanesulfonic acid) or a salt thereof that has a weight-average molecular weight of 500,000 to 8,000,000, is linear, and has a thread length of 10 mm or less at room temperature when formed into a 1% by mass solution, wherein the thread length is a distance determined by: bringing a round disk having a diameter of about 1 cm uniformly and lightly into contact with a surface of the solution; lowering a container that contains the solution at a velocity of 5 mm/sec, and measuring the distance that the container descended until a thread of the solution is cut, and component (b) is a crosslinked water-swellable polymer having a crosslinking density of 0.01 to 1% by mole, or a microgel obtained by pulverizing a gel consisting of a hydrophilic compound having gelating ability.

Abstract: The present invention provides an oil-in-water emulsion composition thickened with a hydrophobically modified polyether urethane, the composition having improved high-temperature stability and giving a pudding-like unique feeling. The invention provides an elastic jelly-like composition characterized in that a hydrophobically modified polyether urethane has been incorporated into an oil-in-water emulsion including oil droplets with an average particle diameter of 150 nm or smaller. The elastic jelly-like composition is transparent or translucent, gives a pudding-like elastic feeling, has excellent viscosity stability at high temperatures, and is suitable for use as a cosmetic-preparation base. The hydrophobically modified polyether urethane is especially preferably a PEG-240/decyltetradeceth-20/HDI copolymer.

Abstract: The invention provides methods of thickening aqueous compositions without increasing stringiness. The method involves using, as thickeners, polymers of polyacrylic acid, poly(2-acryamide-2-methylpropanesulfonate), or salts thereof, having a weight average molecular weight of 500,000-8,000,000. The polymers contain no more than 10 mass % of polymers having a molecular weight of 10,000,00 or more, and/or contain no more than 10 mass % of polymers having more than three times the weight average molecular weight. Aqueous solutions of these polymers have a low degree of stringiness, and are particularly useful as thickeners for cosmetics.

Abstract: The present invention provides an oil-in-water emulsion composition thickened with a hydrophobically modified polyether urethane, the composition having improved high-temperature stability and giving a pudding-like unique feeling. The invention provides an elastic jelly-like composition characterized in that a hydrophobically modified polyether urethane has been incorporated into an oil-in-water emulsion including oil droplets with an average particle diameter of 150 nm or smaller. The elastic jelly-like composition is transparent or translucent, gives a pudding-like elastic feeling, has excellent viscosity stability at high temperatures, and is suitable for use as a cosmetic-preparation base. The hydrophobically modified polyether urethane is especially preferably a PEG-240/decyltetradeceth-20/HDI copolymer.

Abstract: The present invention was aimed to provide a low-stringiness thickener consisting of a compound in high demand as a thickener for cosmetics, i.e., polyacrylic acid or a salt thereof, or PAMPS or a salt thereof, where a stringiness property of the compound was reduced. A low-stringiness thickener consisting of a compound selected from polyacrylic acid. a salt of polyacrylic acid, PAMPS, and a salt of PAMPS, wherein the weight-average molecular weight of the compound is 500 thousand to 8 million, and wherein the content of the compound having the molecular weight of 10 million or higher is 10 mass % or less.

Abstract: To provide a thickening composition which exhibits excellent feelings in use, namely, exhibits excellent freshness, non-stickiness and blend into skin feeling, and does not leave any residue on skin, which can stably keep the viscosity thereof in a low to moderate-level viscosity range and which, even when a salt-type ingredient is incorporated therein, does not undergo viscosity change, and also a cosmetic preparation containing the composition. A thickening composition which comprises (a) from 0.1 to 2% by mass of a specific hydrophobic denatured polyether urethane (associative thickener) and (b) from 0.1 to 2% by mass of a microgel to be obtained by grinding a gel of a hydrophilic compound having a gelling capability, in a ratio of component (a)/component (b) of from 0.1/0.9 to 0.9 to 0.1 (by mass), and which has a viscosity of from 50 to 50,000 mPa·s (with BL-type viscometer, 12 rotations, 25° C.); and a cosmetic preparation containing the thickening composition.

Abstract: To provide a thickening composition which exhibits excellent feelings in use, namely, exhibits excellent freshness, non-stickiness and blend into skin feeling, and does not leave any residue on skin, which can stably keep the viscosity thereof in a low to moderate-level viscosity range and which, even when a salt-type ingredient is incorporated therein, does not undergo viscosity change, and also a cosmetic preparation containing the composition. A thickening composition which comprises (a) from 0.1 to 2% by mass of a specific hydrophobic denatured polyether urethane (associative thickener) and (b) from 0.1 to 2% by mass of a microgel to be obtained by grinding a gel of a hydrophilic compound having a gelling capability, in a ratio of component (a)/component (b) of from 0.1/0.9 to 0.9 to 0.1 (by mass), and which has a viscosity of from 50 to 50,000 mPa·s (with BL-type viscometer, 12 rotations, 25° C.); and a cosmetic preparation containing the thickening composition.

Abstract: The present invention provides a cosmetic that contains glycerin modified on both ends with silicone represented by the following general formula (a). In this formula, R1 denotes a straight chain or branched alkyl group having 1-12 carbon atoms or phenyl group, R2 denotes an alkylene group having 2-11 carbon atoms, m is 10-120, and n is 1-11. The object of the present invention is to provide a cosmetic that contains glycerin modified on both ends with silicone and is superior in terms of the sensation during use and the powder dispersion stability.

Abstract: The present invention provides an external composition for skin that has excellent effects in improving elasticity and alleviating wrinkles while moisturizing the skin, has good spreadability on the skin, and has no stickiness. The external composition for skin of the present invention is characterized by comprising: (A) an acrylic polymer comprising the following monomers (a1), (a2), and (a3) as constituent monomers: (a1) acrylic acid or methacrylic acid; (a2) an alkyl acrylate or alkyl methacrylate; and (a3) an ester between acrylic acid or methacrylic acid and polyoxyethylene alkyl ether; and (B) a cross-linked polyamino acid or its salt. In the external composition for skin of the present invention, it is preferable that (A) is 0.01 to 10.0 weight % as a polymer, and (B) is 0.0001 to 5.0 weight % as a polymer.

Abstract: The present invention provides a cosmetic that contains glycerin modified on both ends with silicone represented by the following general formula (a). In this formula, R1 denotes a straight chain or branched alkyl group having 1-12 carbon atoms or phenyl group, R2 denotes an alkylene group having 2-11 carbon atoms, m is 10-120, and n is 1-11. The object of the present invention is to provide a cosmetic that contains glycerin modified on both ends with silicone and is superior in terms of the sensation during use and the powder dispersion stability.

Abstract: The present invention provides an external composition for skin that has excellent effects in improving elasticity and alleviating wrinkles while moisturizing the skin, has good spreadability on the skin, and has no stickiness. The external composition for skin of the present invention is characterized by comprising: (A) an acrylic polymer comprising the following monomers (a1), (a2), and (a3) as constituent monomers: (a1) acrylic acid or methacrylic acid; (a2) an alkyl acrylate or alkyl methacrylate; and (a3) an ester between acrylic acid or methacrylic acid and polyoxyethylene alkyl ether; and (B) a cross-linked polyamino acid or its salt. In the external composition for skin of the present invention, it is preferable that (A) is 0.01 to 10.0 weight % as a polymer, and (B) is 0.0001 to 5.0 weight % as a polymer.