Patent ID: 6353065
Filing Date: 2002-03-05
Classification: C08F

Abstract:
A process comprising conducting at a pH of less than 7 an emulsion polymerization of at least one monomer which can be polymerized by the radical route in the presence of a stable free radical comprising the linkage: wherein the RL radical exhibits a molar mass of between 40 and 450 and is the formula: wherein R11 and R12, being identical or different, represent alkyl, cycloalkyl, alkoxy, aryloxy, aryl, aralkyloxy, perfluoroalkyl, aralkyl or halogen radicals;and in the presence of an emulsifying agent, the emulsion comprising a continuous liquid aqueous phase comprising at least 50% by weight of water and a dispersed liquid organic phase wherein at each instance during the polymerization at least 50% by weight of the unpolymerized monomer(s) with respect to the total mass of unpolymerized monomer(s) is present in the liquid organic phase.