Patent ID: 8894816
Filing Date: 2014-11-25
Classification: C08F,D21H

Abstract:
1. A process for making vinylamine-vinylformamide-styrene terpolymer additives comprising: a) reacting vinylformamide with styrene or substituted styrene under free radical, emulsion polymerization reaction conditions; b) producing a first polymer product which comprises randomly distributed repeating units by the formula (I) and (II): wherein Ar is an aromatic selected from the group consisting of phenyl and phenyl substituted with alkyl, alkoxy, sulfonate, halo and pyridine or substituted pyridine; R 1 is hydrogen or alkyl; x and y are numbers greater than zero mole percent, and the sum of x and y is 100 mole percent, the ratio of x:y is in the range of from 99:1 to 50:50; c) hydrolyzing the first polymer product with an acid or base treatment; d) producing a second polymer product comprising randomly distributed repeating monomer units having at least two of the formula (III), (IV), (V) and (VI): wherein, R R m