Patent ID: 6515065
Filing Date: 2003-02-04
Classification: C08F,C08G

Abstract:
The process of preparing aqueous dispersions of polymers of olefinically unsaturated monomers in the presence of protective colloids comprising water-soluble nonionic polyurethanes, said nonionic polyurethanes comprising the reaction products ofa) organic polyisocyanates with b) water-soluble polyalkylene glycols containing at least 70% by weight of ethylene glycol groups and with c) polyhydric branched alcohols containing at least three hydroxyl groups per molecule, and wherein the equivalent ratio of b) to c) is in the range from 1 0:01 to 1:10 and the equivalent ratio of [b)+c)] to a) is in the range from 1:0.6 to 1 0.85.