still for vulcanisation of brominated butyl rubber with sulphur as the only elementert vulcanising agents

摘要

1345827 Vulcanizing bromobutyl rubber POLYSAR Ltd 17 Jan 1972 [11 Feb 1971] 2137/72 Heading C3E A composition comprising a brominated butyl rubber and 0À1 to 5 parts by weight of elemental sulphur, per 100 parts of rubber, as the sole vulcanising agent, is vulcanized. The butyl rubber is an isobutylene/isoprene copolymer containing 0À5 to 5 mole per cent copolymerized isoprene.