Patent ID: 7238760
Filing Date: 2007-07-03
Classification: C08F

Abstract:
1. A water-soluble or water-swellable copolymer containing sulfo groups and comprising a) from 3 to 96 mol % of units of formula I wherein R R M is hydrogen, a monvalent metal cation, a divalent metal cation, ammonium, or an organic amine radical; a is 0.5 or 1; b) from 3 to 96 mol % of units of at least one of formula IIa and IIb wherein W is —CO—, —CO—O—(CH R Q is hydrogen or —CHR R wherein if Q is not hydrogen, R c) from 0.05 to 75 mol % of units of at least one of formulas IIIa and IIIb wherein Y is O, NH or NR V is —(CH2) R and X is halogen, a C R d) from 0.01 to 30 mol % of units of formula IV wherein Z is —COO(C R R m is from 2 to 4; n is from 0 to 200; p is from 0 to 20; and R