| abstract |
The present invention relates to a novel copolymer and a method for preparing the same, wherein the copolymer comprises, as a building block, C 1-20 -alkyl (meth)acrylate and/or C 8-20 -vinylaromatic ( monomer a); monoethylenically unsaturated hydrophilic monomers comprising at least one sulfonic acid group (—SO 3 M) (monomer b); and a monoethylenically unsaturated monomer comprising at least one oxazoline group (monomer c), wherein the proportion of monomers (b) and (c), based on the total amount of monomers in copolymer A, is less than 50% by weight in total. |