Patent ID: 6316568
Filing Date: 2001-11-13
Classification: C04B,C08F,D21H

Abstract:
Water-soluble, crosslinkable protective colloids having a weight-average molecular weight of <500,000 comprisinga) 20 to 95% by weight of monomer units containing sulphonic acid or sulphonate groups,b) 4 to 80% by weight of monomer units containing N-methylol or N-alkoxymethyl groups,c) 0.1 to 30% by weight of at least one hydrophobic monomer unit selected from the group consisting of water-insoluble, ethylenically unsaturated compounds and the hydrophobic end groups of initiator radicals or regulator molecules, the contents in % weight being based on the total weight of the copolymer, and wherein optionally up to 50% by weight of monomer units a), containing sulphonic acid/sulphonate groups which are replaced by at least one monomer unit d) containing carboxyl groups or at least one monomer unit e) containing amide groups.