Patent ID: 7199178

Claim:
A process for preparing copolymer dispersions comprising 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) optionally further monomers, other than the compounds of components a)–c), capable of free-radical copolymerization to free-radical polymerization in the presence of e) compounds according to formula (I) wherein R 1 is an aliphatic, araliphatic or aromatic radical having 1 to 18 carbon atoms, R 2 is H or CH 3 , R 3 , R 4 are identical or different aliphatic radicals having 1 to 7 carbon atoms and n is 1 to 4, and subsequently dispersing the resultant copolymer before or after addition of B) a neutralizing agent in C) water.