Patent ID: 7888424

Claim:
A polymer dispersion curable by actinic radiation that is prepared by a process, comprising: I) reacting a (meth)acrylate copolymer A) having a number-average molecular weight M n in the range from 1400 to 10 000 and a polydispersity ranging from 1 to 5.0, said copolymer A) carrying ethylenically unsaturated groups and functional groups capable of a condensation or addition reaction, with at least one compound B) which Ia) carries at least one functional group that is complementary to the functional groups of the copolymer A) that are capable of undergoing a condensation or addition reaction, and additionally at least one ionogenic, ionic group or a combination thereof, or which Ib) carries at least one functional group that is complementary to the functional groups of the copolymer A) that are capable of condensation or addition reaction and is capable of forming an ionogenic or ionic group in a condensation or addition reaction, to give a copolymer AI) which carries ethylenically unsaturated groups and ionogenic groups, ionic groups or a combination thereof, II) with the proviso that when ionogenic groups are present in compound B), converting at least some of the ionogenic groups of the copolymer AI) into ionic groups, and III) dispersing the copolymer AI) in an aqueous dispersion medium.