Patent ID: 8952096
Filing Date: 2015-02-10
Classification: C08F,C08L,C09D

Abstract:
1. A graft copolymer obtained via A) forming a copolymer via free-radical-initiated polymerization of one or more vinyl esters a) and one or more further ethylenically unsaturated monomers b) comprising at least one further functional group, B) and then linking monomer units b) in the copolymer from stage A) to one or more further monomers b) by polymer analogous reaction in such a way that at least one group capable of free-radical polymerization is introduced into the copolymer from stage A), and C) free-radical-initiated polymerizing of one or more ethylenically unsaturated mono- or dicarboxylic acids or salts thereof, or esters of acrylic acid or methacrylic acid of unbranched or branched alcohols having from 1 to 15 carbon atoms, or vinyl halides or vinylaromatics onto the product from stage B), wherein stage C) uses from 60 to 98% by weight of said ethylenically unsaturated monomers, based on the total weight of the graft copolymer produced in stage C), and wherein the molar mass Mn of the graft copolymer is from 1000 to 400 000 g/mol.