| abstract |
Aqueous, self-crosslinking copolymer dispersions ABC , obtainable by free-radically initiated copolymerization in the first stage of a monomer mixture A comprising olefinically unsaturated monomers A1 with carbonyl groups, unsaturated carboxylic acids or semi-esters of unsaturated dicarboxylic acids A2 , monomers A3 selected from vinylaromatics, n-butyl methacrylate and alkyl esters of unsaturated carboxylic acids or dialkyl esters of unsaturated dicarboxylic acids, esters A4 selected from alkyl esters of unsaturated carboxylic acids or dialkyl esters of unsaturated dicarboxylic acids, and other radically polymerizable monomers A5, and then adding a second monomer mixture B and further polymerization in the second stage, the mixture B of olefinically unsaturated monomers B1 corresponding to A1 , ester B2 corresponding to A4 , and monomers B3 corresponding to A5 , and then compounds C with hydrazine or hydrazide groups z be added. |