Patent ID: 8637613
Filing Date: 2014-01-28
Classification: C08F,C08L,C09D

Abstract:
1. A stable aqueous dispersion of transparent organosilicone copolymers, wherein the transparent organosilicone copolymers are self-dispersible in water and are obtained by means of free-radically initiated solution copolymerization of monomers consisting of a) one or more ethylenically unsaturated organic monomers selected from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having 1 to 15 C atoms, vinylaromatics, olefins, dienes, vinyl halides, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, n-butyl, isobutyl, and tert-butyl acrylate, n-butyl, isobutyl, and tert-butyl methacrylate, 2-ethylhexyl acrylate, and norbornyl acrylate, b) one or more silicone macromers, and c) one or more water-soluble comonomers selected from the group consisting of ethylenically unsaturated monocarboxylic and dicarboxylic acids or their salts, acrylamide, ethylenically unsaturated carbonitriles, monoesters and diesters of fumaric acid and maleic acid, ethylenically unsaturated sulfonic acids and/or their salts, diallyldimethylammonium chloride (DADMAC), 3-trimethylammoniopropylmethacrylamide chloride (MAPTAC), 2-trimethylammonioethyl (meth)acrylate chloride, ethylenically unsaturated phosphonic acids and/or their salts, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, 2-hydroxyethyl acrylate, hydroxypropyl acrylate, glycerol 1-allyl ether; 2-dimethylaminoethyl methacrylate, 3-dimethylaminopropylmethacrylamide, 2-tert-butylaminoethyl methacrylate, allyl N-(2-aminoethyl)carbamate hydrochloride, allyl N-(6-aminohexyl)carbamate hydrochloride, allyl N-(3-aminopropyl)hydrochloride, allylamine and vinylpyridine, wherein the one or more water-soluble comonomers c) are applied in an amount of 1% to 30% by weight, based on the total weight of components a) to c), and optionally auxiliary monomers selected from the group consisting of polymerizable silanes, mercaptosilanes in hydrolyzed form, functionalized allyl ethers, vinyl ethers, N-vinylpyrrolidone and N-vinylformamide, wherein the copolymerization is performed in a medium comprising one or more organic solvents.