Patent ID: 8445610
Filing Date: 2013-05-21
Classification: C08F

Abstract:
1. A transition metal mediated controlled chain transfer agent polymerization process comprising polymerizing radically (co)polymerizable monomer(s) by a controlled chain transfer agent polymerization process in the presence of: an initiator comprising substituted dithio-groups selected from the group consisting of dithioesters, dithiobenzoates, dithiocarbamates, trithiocarbonates and xanthates, substituted with various alkyl substituents; a transition metal compound; and a ligand; wherein the resulting (co)polymer has a polydispersity of less than 1.5; and wherein the initiator comprising substituted dithio-groups are formed by reaction of one of a dithioester disulfide, a dithiobenzoate disulfide, a dithiocarbamate disulfide, a trithiocarbonate, and a xanthate disulfide in the presence of: an alkyl halide, optionally comprising functional groups; a transition metal catalyst; and a ligand.