| abstract |
PCT No. PCT/EP94/00624 Sec. 371 Date Oct. 2, 1995 Sec. 102(e) Date Oct. 2, 1995 PCT Filed Mar. 3, 1994 PCT Pub. No. WO94/20556 PCT Pub. Date Sep. 15, 1994The invention relates to core/shell copolymer dispersions whose shell comprises hydrolyzable organosilicon comonomers, the shell consisting of a copolymer comprising, a) from 70 to 95% by weight of acrylic and/or methacrylic C1 to C10 alkyl esters of which from 20 to 80% by weight, based on the overall weight of a), have a water-solubility of not more than 2 g/l and from 80 to 20% by weight, based on the overall weight of a), have a water-solubility of at least 10 g/l, b) from 5 to 25% by weight of one or more ethylenically unsaturated, functional and water-soluble monomers including a proportion of from 25 to 100% by weight, based on the overall weight of b), of unsaturated carboxylic acids, and c) from 0.01 to 10% by weight of one or more olefinically unsaturated, hydrolyzable silicon compounds of the general formula R1-Si(OR2)3, and whose core, making up a proportion of from 75 to 98% by weight of the overall weight of the core/shell copolymer, consists of a polymer comprising d) one or more comonomers from the group consisting of vinyl esters, acrylic and/or methacrylic esters, vinyl chloride, vinylaromatic compounds and ethylene. |