Patent ID: 9005397
Filing Date: 2015-04-14
Classification: C08F,D21H

Abstract:
1. An aqueous polymer dispersion comprising an anionic water-soluble dispersion polymer comprising in polymerized form a monomer mixture comprising (i) one or more anionic monomers, (ii) a first non-ionic vinyl monomer which is acrylamide, and (iii) at least one second non-ionic vinyl monomer; a water-soluble salt and a stabilizer, wherein the water soluble salt is present in an amount from about 3 to about 40% by weight, based on the total weight of the dispersion, and wherein the monomer mixture comprises from about 1 to about 40 mole % of anionic monomer, from about 20 to about 98 mole % of acrylamide, and from about 15 to about 40 mole % of second non-ionic vinyl monomer, the percentages being based on the total amount of monomers and the sum of percentages being 100.