Process for the preparation of novel high chlorinated butyl rubber and vulcanizable composition thereof

摘要

A process for preparation of a highly chlorinated isobutylene- multiolefin copolymer, such as butyl rubber, containing more than one but not exceeding two chlorine atoms per double bond of the copolymer by chlorinating such copolymer in the presence of an aliphatic diamine derivative, such as ethylene diamine, propylene diamine, piperazine, triethylene diamine or bis-N,N-ethylene-ethylene diamine. A vulcanizable composition containing such chlorinated copolymer has has improved rate of vulcanization, covulcanizability with highly unsaturated rubber and adhesiveness.