Butyl rubber, chemically identified by CAS 9010-85-9, is a synthetic elastomer produced through the copolymerization of isobutylene with a small percentage of isoprene. This material is distinguished by its exceptional impermeability to gases and moisture, making it a critical component in applications requiring airtight seals. It exhibits high chemical stability, resistance to oxidation, and excellent thermal aging properties, maintaining its physical integrity even under prolonged exposure to environmental stressors.
In industrial and research contexts, butyl rubber is valued for its unique viscoelastic properties, which provide significant energy absorption and vibration damping capabilities. The material is generally supplied in solid bales or granules and requires standard rubber processing equipment for compounding and vulcanization. Its versatility allows for modification through halogenation to enhance curing rates and compatibility with other elastomers, further extending its utility across diverse manufacturing sectors.