| abstract |
PURPOSE: To obtain at low cost the title polymer for, e.g., adhesives by polymerizing a cationically polymerizable monomer including isobutylene in an inert solvent using a catalyst made up of a specific metal halide and an initiator combined with chain transfer agent. n CONSTITUTION: The objective polymer can be obtained by polymerizing a cationically polymerizable monomer including isobutylene in an inert solvent (e.g., methylene chloride) using a catalytic system, a combination of (A) a metal halide of formula SnX 4 (X is halogen) or formula TiX 4 (e.g., titanium tetrachloride) with (B) an initiator combined with chain transfer agent consisting of an aromatic compound having substituent, of the formula [Y is halogen, RCOO (R is monovalent organic group) or RO; R 1 is H; R 2 is H or (substituted) monovalent hydrocarbon group] [e.g., p-bis (chloromethyl)durene]. n COPYRIGHT: (C)1990,JPO&Japio |