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CIIR rubber – Chlorobutyl rubber

CIIR rubber – Chlorobutyl rubber (CIIR) is produced by chlorination of butyl rubber (IIR). Chlorobutyl rubber is the result of chlorination of butyl rubber with a degree of unsaturation of at least 1.8 mol. The chlorine content in chlorobutyl rubber ranges from 1.1% to 1.3%. In addition to the standard properties of butyl rubber (IIR), chlorobutyl rubber (CIIR) has a better permanent pressure mark. Moreover, it can also be combined with other types of rubber.

What does the abbreviation CIIR stand for?

The abbreviation CIIR is an abbreviation of the English language. It stands for chlorinated isobutylene isoprane rubber. In Polish it means chlorobutyl rubber.

The trade names for chlorobutyl rubber (CIIR) are:

  • Lanxess Chlorbutyl
  • ExxonTM Chlorbutyl
  • Lanxess
  • Exxon

Chlorobutyl rubber – application

Chlorobutyl rubber (CIIR) has the same application as butyl rubber (IIR). Therefore, it will find its way into both construction and vulcanization. It will be useful in the production of tires, inner tubes and many other rubber elements. Seals and insulators are also made of it. Due to resistance to high temperatures, it is used in the production of hoses for hot liquids. Rubber with an admixture of chlorine (CIIR) or bromine (BIIR) is distinguished by high processing properties. They do not age even with low air permeability.