Butyl tape with South Korea's Daelim original 1300

Butyl rubber has excellent chemical stability and thermal stability, the most prominent is airtight and watertight. It is only natural rubber air permeability 1/7, 1/5 SBR, while natural rubber vapor transmission rate was 1/200, 1/140 styrene-butadiene rubber. Therefore mainly used to produce butyl tape, tape, sealants and various inner tubes, steam pipes, water births, dam bottom, gaskets and other rubber products. In 1943, the US Esso Chemical Company first achieved industrial production. Since then, Canada, France, the Soviet Union, also have realized the industrialized production of butyl rubber. The early 1980s, the world butyl rubber production capacity of about 650kt, representing about 5% of total production of synthetic rubber. Butyl rubber from industrial production since the route of raw materials, production processes and structure the polymerization reactor has been little change in the general use of methyl chloride as diluent, aluminum chloride as a catalyst, which can control both the amount of monomer conversion rate. Product according to level of unsaturation, isoprene is generally used in an amount from 1.5% to 4.5% of the amount of isobutene conversion was 60% to 90%. The polymerization temperature was maintained at -100 ℃ (ethylene and propylene using as coolant).