Patent ID: 8318879
Filing Date: 2012-11-27
Classification: C08F,C08L,C09D,C09J

Abstract:
1. High silicone content organosilicone copolymers having a silicone content of ≧25% by weight, in the form of their high-solids solution in a solvent consisting of isopropanol having a solids content of greater than 30% by weight, obtainable by means of free-radically initiated solution polymerization of a) 20% to 75% by weight of one or more ethylenically unsaturated monomers, and b) 25% to 80% by weight of one or more silicones of the general formula R 85% to 100% by weight of the silicones b) contain one to two polymerizable groups, and silicones b) having only one polymerizable group are used only in a mixture with silicones b) having two polymerizable groups, and in a weight ratio <50/50, the amounts in % by weight for components a) to b) being based in each case on the total weight of the monomers used, adding up to 100% by weight, characterized in that the polymerization takes place in isopropanol as solvent in which silicone b) has a solubility of less than 5% by weight under standard conditions, wherein the one or more ethylenically unsaturated monomers a) are selected from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, n-, iso-, and tert-butyl acrylate, n-, iso-, and tert-butyl methacrylate, 2-ethylhexyl acrylate, norbornyl acrylate, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, 1-methylvinyl acetate, vinyl pivalate, vinyl esters of α-branched monocarboxylic acids having 5 to 11 C atoms, ethylene, propylene, 1,3-butadiene and isoprene.