Butyl rubber (IIR)

Butyl rubber is a copolymer of isobutylene and a small amount of rubber matrix. Butyl rubber is similar to EPDM material, with excellent chemical resistance and resistance to polar fluids, excellent electrical insulation and good ozone resistance. The special feature of butyl rubber is its extremely low gas permeability and high shock absorption and high shock absorption capabilities. These properties make butyl rubber a polymer for many applications.

Curing system

Standard IIR is sulfur bridged

Temperature range

-55 ~ 100℃

Hardness range

Shaw A50 degrees to 70 degrees

Application

Butyl rubber has low air permeability and is used in automobile tire inner tubes, airtight layers of tubeless tires, and in the manufacture of white sidewalls of automobile outer tires and bicycle inner tubes. Butyl rubber has good heat resistance and can be used to make water tires and vulcanized bladders.

For applications in contact with food or beverages, IIR can adjust the formulation using "white list" ingredients specified in FDA 21.CFR 177.2600. For example, it can be used for alcohol or medical bottle stoppers, and can also be used to make medical bottle stoppers and disposable syringe stoppers.