Patent ID: 8097126
Filing Date: 2012-01-17
Classification: C08F,C08L,D21H

Abstract:
1. An aqueous slurry composition comprising at least one finely divided filler and at least one water-soluble amphoteric copolymer which is obtained by copolymerization of a monomer mixture consisting of a) at least one N-vinylcarboxamide of the formula I where R b) at least one monomer which is selected from monoethylenically unsaturated sulfonic acids, phosphonic acids, phosphoric esters and derivatives thereof, c) optionally, but subject to the below proviso, at least one monomer which is selected from monoethylenically unsaturated mono- and dicarboxylic acids, the salts thereof and dicarboxylic anhydrides, d) optionally, at least one monoethylenically unsaturated monomer which is free of nitrile groups and is selected from the group consisting of esters of α,β-ethylenically unsaturated mono- and dicarboxylic acids with C e) optionally, at least one compound which has at least two ethylenically unsaturated double bonds in the molecule, with the proviso that the monomer mixture contains at least one monomer b) or c) having at least one free acid group and/or an acid group in salt form, and subsequent partial or complete hydrolysis of the —CO—R