chlorbutyl

Chlorbutyl refers to a synthetic rubber produced by the copolymerization of isobutylene with a small amount of isoprene. This copolymerization results in a polymer with a low degree of unsaturation, which is a key characteristic that distinguishes it from other types of rubber. The presence of chlorine atoms within the polymer chain further modifies its properties.

The primary use of chlorbutyl is in the manufacture of inner tubes for tires. Its excellent impermeability to gases, meaning it holds air very well, makes it ideal for this application. This property is significantly superior to natural rubber or other synthetic elastomers, reducing the rate at which tires lose pressure. Beyond inner tubes, chlorbutyl is also utilized in pharmaceutical stoppers and seals due to its low permeability and good chemical resistance. Its ability to resist aging and weathering also contributes to its widespread use in various industrial applications where durability is crucial. The production process involves low-temperature polymerization, and the resulting elastomer can be further processed through vulcanization to achieve its final desired properties.