butüülkummist

Butüülkummist, also known as butyl rubber, is a synthetic rubber with a low permeability to gases. It is a copolymer of isobutylene and a small amount of isoprene. The isoprene units provide cross-linking sites, allowing for vulcanization. Butyl rubber is known for its excellent resistance to heat, ozone, weathering, and many chemicals, including acids and alkalis. It also exhibits good electrical insulating properties.

The primary applications of butyl rubber are in inner tubes for tires due to its excellent air-holding capacity, and in pharmaceutical stoppers and seals where its low permeability and inertness are crucial. It is also used in the production of adhesives, sealants, vibration damping materials, and protective clothing. The production of butyl rubber involves cationic polymerization of isobutylene and isoprene. Its unique properties make it a valuable material in various industrial and consumer products where gas impermeability and resistance to environmental factors are essential. It is distinct from natural rubber and other synthetic rubbers in its molecular structure and resulting performance characteristics.