and the domestic BIIR market still has much room for development.

bromobutyl rubber (biir), as an isobutylene-isoprene copolymer elastomer containing active bromine, has good air tightness, high shock absorption, aging resistance, weather resistance, ozone resistance and chemical resistance. it is gradually replacing ordinary butyl rubber in fields such as radial tires, bias tires, sidewalls, heat-resistant inner tubes, and pharmaceutical bottle stoppers. at the same time, bromobutyl…