Butyl

Butyl

CAS number: 308063-42-5

Isobutylene-isoprene rubber (IIR) is developed through copolymerization of about 98% of isobutylene with about 2% of isoprene. As a synthetic rubber it works well for general purposes that need an air tight rubber and provide shock absorption, abrasion, weather and temperature resistance.
It is especially useful in vacuum sealed applications as it is water-repellant and also permeable to gas.

Properties:

• Water and gas impermeability
• Low glass transition temperature
• Sublime ozone temperature and chemical resistance
• High damping at ambient temperatures
• Biocompatible and age resistant

Application:

The first universal application of butyl rubber was for making tire inner tubes. It’s versatility and air tight properties prime it for high pressure applications such as

• Shock mount
• Tubeless tire liners
• Sealant for rubber roof repair
• Inner tubes
• Tank Liners
• Electrical fluids
• Pigment concentrates
• Stoppers for glass bottles, medicine bottles, and pharmaceuticals
• Sealants and adhesives
• O-rings
• Sealants, hoses, and mechanical goods
• Adhesives
• Agricultural chemicals
• Personal care products
• Rubber & polymer modification