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LANXESS halobutyl rubbers (LANXESS Bromobutyl and LANXESS Chlorobutyl) are produced by reacting bromine, or chlorine, with butyl rubber in a continuous process.

The halogenation of butyl rubber, with either chlorine or bromine, significantly increases cure reactivity, provides compatibility with unsaturated polymers, and enhances adhesion as compared to regular butyl rubber. Significant improvements in heat, ozone, flex fatigue resistance and compression set can be achieved through the selection of appropriate compounding ingredients and curing systems.

The versatility and properties of halobutyl rubber have led to significant growth in the use of butyl-type polymers in a diverse range of tire and non-tire applications.

Bromobutyl vs. Butyl and Chlorobutyl
Bromobutyl has two natural points of reference, namely: (1) butyl rubber, of which it is a modification, and (2) chlorobutyl, to which it is analogous. In each case, bromobutyl can be said to have several properties in common and to offer several advantages of varying degree.

Many of the properties of halobutyl vulcanizates are virtually identical, regardless of the halogen employed. With bromine, however, the cure sites in the polymer chain are more reactive, resulting in faster cures and better adhesion to unsaturated rubbers.

Because of the faster cure rate of bromobutyl, direct substitution of bromobutyl in chlorobutyl compounds frequently results in reduced scorch times which, in some cases, result in unacceptable factory processing. In these cases, satisfactory processing is readily achieved by adjusting curative types and/or levels.

Business Unit: Tire & Specialty Rubbers

Key Properties:

  • high impermeability
  • cure versatility
  • faster cure rate
  • cure compatibility
  • good adhesion
  • better heat resistance

Provided that compounds based on any of these rubbers are correctly formulated and processed, the vulcanizates have excellent resistance to weathering, ozone, and hot air; very good resistance to acidic and basic chemicals; very low permeability to gases and liquids; and good rheological properties.


Articles needing low permeability to gases and liquids, e.g., tire inner liners, hoses, seals of certain types, and membranes. Also suitable for pharmaceutical stoppers and rubber articles needing good resistance to chemicals, weathering, and ozone, such as tank linings, conveyor belts, and protective clothing.

•    Bromo
•    Bromobutyl
•    Copolymers of brominated Isobutylene
•    Bromobutyl Rubber
•    BIIR


Min Min
Customer Service Rep - Greater China

ARLANXEO High Performance Elastomers (Changzhou) Co., Ltd

No 8, Huanghai Road, Xinbei Industrial Park

213127 Changzhou

China, CN

Phone: +86 21 6109 6664

Fax: +86 21 6109 6665

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