language

News

Home page

Introduction of butyl rubber, the main application of butyl rubber

2022-03-29

Butyl rubber is a synthetic rubber copolymerized by isobutylene and a small amount of isoprene. It is one of the seven general synthetic rubbers (butadiene rubber, styrene butadiene rubber, nitrile butadiene rubber, neoprene, ethylene propylene rubber, butyl rubber and isoprene rubber). Its English name is Butyl Rubber, abbreviated as IIR (abbreviation of Isobutylene Isoprene Rubber). White to pale gray, odorless and tasteless; insoluble in ethanol and ether. Viscosity average molecular weight =(35-45)× l04, relative density (17 ℃/4 ℃)0.92, (27 ℃/4 ℃)0.91, refractive index 1.5078 ~ 1.508l, glass transition temperature -69 ℃, specific heat capacity 1.94kJ/(kg K), thermal conductivity 0.091W/(m.K). Isoprene chain units account for only 0.6 to 3.0 percent of the main chain, so butyl rubber is highly saturated in the chain.

Previous： The three main applications of butyl rubber

Next： The advantages of butyl rubber inner tube