Patent ID: 7049360

Claim:
A water-soluble or water-dispersible copolymer obtained by free-radical polymerization of a monomer mixture consisting essentially of a) 80 to 20% by weight of a mixture of hydroxy-C 1 –C 6 -alkyl(meth)acrylate and one or more compounds of the formula (A) or (B) with R 1 =H, C 1 –C 6 -alkyl, R 2 =H, CH 3 , R 3= C 1 –C 24 -alkyl, or mixtures thereof, wherein the content of the content of hydroxy-C 1 –C 6 -alkyl(meth)acrylate in % by weight in a) is at least equal to the one or more compounds of the formula (A) or (B) in % by weight, in the presence of, b) 20 to 80% by weight of polyvinyl alcohol (PVA) and c) 0 to 20% by weight of other polymerizable compounds (C) selected from the group consisting of acrylic and methacrylic acids, crotonic acid, mono(C 1 –C 8 )-alkyl maleates, maleic acid, fumaric acid, itaconic acid, (meth)acrylonitrile, ethylenically unsaturated di(C 1 –C 22 )-alkyl dicarboxylates, ethylenically unsaturated sulfonic acids or sulfonic acid derivatives, acyclic N-vinylcarboxamides and N-vinyllactams.