Patent ID: 6559259
Filing Date: 2003-05-06
Classification: C04B,C08F,D21H

Abstract:
In a composition which employs an aqueous dispersion of an addition polymer prepared by polymerizing ethylenically unsaturated monomers and stabilized by a protective colloid, or a redispersible polymer powder prepared from said aqueous dispersion, the improvement comprising:including as at least a portion of said protective colloid, a water-soluble, crosslinkable protective colloid having a weight average molecular weight less than 500,000, and comprising: a) 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 20% 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), are replaced by a monomer unit d) containing carboxyl groups and/or a monomer unit e) containing amide groups.