Patent ID: 7632873
Filing Date: 2009-12-15
Classification: A61K,A61Q,Y10S

Abstract:
1. A cosmetic or dermatological composition comprising at least one gradient copolymer comprising at least two different monomeric residues, wherein at least one monomeric residue is a hydrophilic monomeric residue, which is present in an amount ranging from 2% to 70% by weight, relative to the total weight of the copolymer, chosen from residues of: derivatives of C C C1-C8 dialkyldiallylamines; vinylamines; vinylpyridines; acid salts thereof and quaternized forms thereof; ethylenic carboxylic acids; carboxylic anhydrides comprising at least one vinyl bond; ethylenic sulphonic acids and their salts; vinyl benzoic acids, vinylphosphonic acids and their salts; potassium salts of acryloyloxy-3-sulphopropyl, and the compounds of formula CH amides of unsaturated carboxylic acids; hydroxyalkyl (meth)acrylates; (meth)acrylates of polyethylene glycol (5 to 100 EO) and of glycol, which may be additionally substituted on their terminal function by at least one group chosen from alkyl, phosphate, phosphonate and sulphonate groups; alkoxyalkyl (meth)acrylates; (meth)acrylates of polysaccharides; vinylamides; vinyl ethers; methacrylamidopropoxytrimethylammoniumbetaines; N,N-dimethyl-N-methacryloxyethyl-N-(3-sulphopropyl)ammoniumbetaines, 3-methacryloylethoxycarbonylpyridiniums; a compound of formula: and 4-vinylpyridiniumsulphopropylbetaine of formula: and wherein at least one other monomeric residue results from at least one monomer which is capable of forming a homopolymer with a Tg less than or equal to 20° C., and which is present in an amount ranging from 10% to 90% by weight, relative to the total weight of the copolymer, the at least one monomer chosen from: ethylenic hydrocarbons comprising from 2 to 10 carbons; acrylates with the formula CH R methacrylates with formula: CH wherein R N- and N,N-substituted derivatives of amides of C vinyl esters of formula: R vinyl alkyl ethers comprising from 1 to 12 carbon atoms, wherein the at least one gradient copolymer exhibits a mass polydispersity index (Ip) less than or equal to 2.5.