Patent ID: 6469115
Filing Date: 2002-10-22
Classification: C08F

Abstract:
A method for preparing a virtually telechelic silyl-functional polyisobutylene, said method comprising reacting, in the presence of a Lewis acid,(A) a monomer consisting essentially of isobutylene; (B) an initiator of the formula (C) a styryl comonomer of the formula wherein R is selected from H or methyl group, Râ€² is a divalent non-aromatic hydrocarbon group having 1 to 6 carbon atoms, Râ€³ is independently selected from alkyl groups having 1 to 10 carbon atoms or aryl groups having 6 to 10 carbon atoms, Râ€²â€³ is a divalent non-aromatic hydrocarbon group having 2 to 6 carbon atoms, X is independently a halogen group, Y is halogen and n is independently 1, 2 or 3.