Process for preparing graft polymer of pvc

Details Process for preparing graft polymer of pvc Process for preparing graft polymer of pvc

C - Chemistry, Metallurgy

08

F

204/91.46, 204/9

C08F 2/46 (2006.01) C08F 259/04 (2006.01)

Patent

CA 1095851

ABSTRACT OF THE DISCLOSURE Disclosed is a process for the preparation of a graft copolymer comprising a PVC backbone and graft branches formed from cationically polymerizable monomers such as styrene, isoprene, butadiene and in particular, isobutylene. The process includes the steps of irradiating the PVC resin to form reactive sites thereon, dissolving the irradiated resin in a suitable solvent, adding a monomeric charge of iso- butylene and a catalytic amount of an alkylaluminum compound to polymerize a plurality of polyisobutyl- one branches from the reactive sites, subsequently terminating the reaction and separating the graft copolymer.

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