Patent ID: 7495053

Claim:
A process for preparing copolymer dispersions comprising 1) subjecting A) one or more vinyl monomer mixtures comprising a) OH-free (meth)acrylic esters and/or vinylaromatics, b) hydroxy-functional vinyl monomers and/or hydroxy-functional (meth)acrylic esters, c) ionic and/or potentially ionic monomers capable of free-radical copolymerization, and d) if desired further monomers, other than the compounds of components a)-c), capable of free-radical copolymerization to free-radical polymerization in the presence of e) at least one compound containing lactone groups and f) low molecular weight polyols having a number-average molecular weight of from 62 to 250 Da, and 2) subsequently dispersing the resultant copolymer B) before or after addition of a neutralizing agent C) in water.