Bromobutyl Rubber Stopper Properties

The answer is it depends.

Bromobutyl rubber stopper properties.

These elastomers are obtained by continuous halogenization of butyl rubber. Bromobutyl biir is a copolymer of isobutylene and small amounts of brominated isoprene which provides unsaturated sites for vulcanization this elastomer has many of the attributes of butyl rubber including low gas and moisture permeability good vibration damping low glass transition temperature excellent resistance to ageing and weathering. Vulcanization heating and curing of natural rubber results in the cross linking of individual polymer chains that forms a copolymer of isobutylene and to a smaller extent isoprene. Butyl rubber is produced by polymerization of about 98 of.

Halogen has only slight effect on the principal characteristics of butyl rubber. Bromobutyl rubbers properties and applications. There is no significant distinction between bromobutyl and chlorobutyl as the properties of these elastomers are very similar. Your technical customer service tcs representative can help you decide.

Bromobutyl rubber is an excellent choice for pharmaceutical stoppers and seals applications due to low levels of additives and impurities high impermeability to moisture and air chemical and biological inertness resistance to aging and heat sterilization and easiness to vulcanize using low levels of clean curatives. In the us and european markets serum vial stoppers are commonly available in both bromobutyl and chlorobutyl rubber for use in pharmaceutical packaging. Butyl rubber derived synthetically from petrochemicals is a copolymer of isobutylene and to a smaller extent isoprene. Bromobutyl chlorobutyl bromo chloro isobutylene isoprene.