Halobutyl
Halobutyl refers to a halogenated derivative of butyl rubber, typically produced by chlorination or bromination of polyisobutylene-based butyl rubber. By introducing chlorine or bromine into the polymer, halobutyl chains gain increased chemical resistance and a reduced level of unsaturation. The halogenated grades are usually described as chlorinated or brominated halobutyl rubber, with the extent of halogenation tailored to desired properties.
Halobutyl is formed from standard butyl rubber (an isobutylene–isoprene copolymer) via controlled halogenation. The process lowers
Halobutyl exhibits superior gas and moisture barrier performance compared with non-halogenated butyl rubber, contributing to reduced
The principal use of halobutyl is in tire innerliners and inner tubes, where low gas permeability helps
As with other halogenated polymers, halobutyl should be handled in accordance with standard industrial hygiene practices.