Ding Ji rubber (IIR) is a kind of synthetic rubber varieties of isobutylene and isoprene in the presence of Friedel-Craft catalyst for cationic polymerization, has excellent air tightness and good heat resistance, aging resistance, acid and alkali resistance, ozone resistance, solvent resistance, electrical insulation, shock and low water absorption properties, making it in the car tire water, tire, vulcanized capsule, airtight layer, sidewall, wire and cable, waterproof materials, damping materials, medicinal bottle, food (chewing gum), has been widely applied to rubber dam, gas appliances, adhesives, tyre valve core, anti-corrosion products, dock ship support rotation, bridge support pad and heat resistant conveyor belt etc.. Ding Ji Ding Ji is divided into ordinary rubber rubber and halogenated rubber Ding Ji two categories, including halogenated rubber Ding Ji (HIIR) can be divided into chloride rubber (CIIR) and Ding Ji Ding Ji (BIIR) rubber bromide two categories, because of its superior performance than ordinary rubber Ding Ji, so its application is more and more widely. The raw materials required are isobutylene and isoprene.