Patent ID: 6048945
Filing Date: 2000-04-11
Classification: C08F,C09B,C09D,D21H

Abstract:
A graft polymer comprising (1) at least one polymer containing alkylene oxide units and (2) at least one polymerized ethylenically unsaturated compound, wherein the graft polymer is obtained by free radical polymerizing(A) a monomer or monomer mixture comprising:(a) from 10-100% by weight of a N-vinylcarboxamide of the formula: ##STR14## where R.sup.1 and R.sup.2 are each H or C.sub.1 -C.sub.6 -alkyl, (b) from 0-90% by weight of at least one other monoethylenically unsaturated monomer which is copolymerizable with (a), and(c) from 0-5% by weight of at least one monomer having at least two ethylenically unsaturated nonconjugated double bonds in the molecule, in the presence of(B) a material selected from the group consisting of a polytetrahydrofuran and a polymer which contains at least 3 units of a C.sub.2 -C.sub.4 alkylene oxide and is a homopolymer of C.sub.2-4 -alkylene oxide having two free terminal OH groups or random or block copolymers of C.sub.2-4 -alkylene oxides having two free terminal OH groups or the reaction products of C.sub.2-4 -alkylene oxides with phenols, amines or fatty carboxylic acids, in a weight ratio (A):(B) ranging from 95:5 to 10:80, followed by eliminating some or all of the groups ##STR15## from the polymerized monomers (a) in the graft polymer to form units of the formula ##STR16##