C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 210/12 (2006.01)
Patent
CA 2113891
PROCESS FOR PRODUCING A HALOGENATED BUTYL RUBBER Abstract of the Disclosure A halogenated butyl rubber is prepared by a process wherein a monomer charge comprising isobutylene, and a conjugated diolefin having the formula Image wherein R1, R2 and R3 which may be the same or different are a methyl group or a hydrogen atom and X is bromine or chlorine together with a initiator having the formula Image wherein each R4 is an alkyl, aryl or aralkyl group, Y is preferably an alkoxy, hydroxy, peroxy ester or halide, and n is a positive whole number are introduced into a suitable reaction vessel in a specified ratio at a temperature of from about -90° to -10°C, a solution of a Lewis acid is added and the monomers are copolymerized at said temperature to form said halogenated butyl rubber, and the halogenated rubber is recovered from solution.
de Gagne Jacqueline A.
Polysar Rubber Corporation
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