Other articles where BIIR is discussed: butyl rubber: …fraction of IIR to make BIIR or CIIR (known as halobutyls). The properties of these polymers are similar to those of IIR, but they can be cured more rapidly and with different and smaller amounts of curative agents. As a result, BIIR and CIIR can be cocured more readily in…

Bromobutyl Rubber (BIIR) is used by the tire industry in the production of inner liner of the tubeless tires and radial tires, heat-resistant tubes, and by the rubber processing industry in the production of rubber technical items and medical items. Ash (% wt, max.)

Butyl rubber is a copolymer of isoprene (minor) and isobutylene. Chlorobutyl (CIIR) and Bromobutyl (BIIR) contains 1.2% of the halogen. The halogen addition changes the cure characteristics and can improve adhesion. IIR rubber resists degradation by fats/oils/greases and ozone and other strong oxidizing chemicals.

often abbreviated as BIIR (Brominated Isobutylene-Isoprene Rubber), is a synthetic rubber that is a modified version of butyl rubber. It is created by introducing bromine atoms into the butyl rubber polymer structure.

Exxon™ Bromobutyl Rubber is a brominated copolymer of isobutylene and isoprene (BIIR) with faster and more stable cure compared to CIIR. It offers a low permeability to gases and moisture, low glass transition temperature and a wide vulcanization versatility with fast cure rates.

Butyl rubber is a copolymer of isoprene (minor) and isobutylene. Chlorobutyl (CIIR) and Bromobutyl (BIIR) contains 1.2% of the halogen. The halogen addition changes the cure characteristics and can improve adhesion.IIR rubber resists degradation by fats/oils/greases and ozone and other strong oxidizing chemicals.

biir Both butyl and halobutyl rubbers provide excellent inflation pressure retention. They are an ideal choice for inner tubes of bicycles, trucks, and industrial and agricultural tires.

isobutylene (IB) with about 2 wt% isoprene (IP). Halogenated butyl rubbers include BIIR (brominated isobutyl isoprene rubber, bromobutyl rubber) and CIIR (chlorinated isobutyl isoprene rubber). Currently, ExxonMobil and LANXESS are the worlds major producers of butyl rubber’ and halogenated butyl rubber.

Bromobutyl rubber is an isobutylene copolymer with trace amounts of brominated isoprene that provides unsaturated vulcanization sites.

BIIR is a well-established synthetic rubber which is obtained by bromination of butyl rubber (IIR). The higher reactivity of the allylic bromide groups in BIIR facilitates sulfur curing. Furthermore, BIIR shows higher compatibility with unsaturated polymers and …