Sealant derived from polybutene together with resins, oils and solvents. It can accommodate movement of up to ten percent of the joint width for construction use.
Isobutene-isoprene rubber (IIR), synthetic rubber, soft rubber, chlorobutyl and bromobutyl rubber as variants containing halogens with modified properties, high chemical resistance and high resistance to permeation, resistant to ozone and weathering
A butyl-based, synthetic elastomer.
synthetic rubber made by polymerizing isobutylene
A general purpose synthetic elastomer (rubber) produced by copolymerizing isobutylene with small amounts of isoprene. Butyl rubber has a high resistance to chemicals and low permeability to gases. Its permeability to air is 70% better than that of natural rubber and for this reason is superior for tire tubes and tubeless tire inner liners.
an elastomer based on isobutylene, known for resistance to gas permeation and high damping
A copolymer of about 98% isobutylene and 2% isoprene. It has the poorest resistance to petroleum oils and gasoline's of any rubber. Excellent resistance to vegetable and mineral oils: to solvents such as acetone, alcohol, phenol and ethylene glycol; and to water and gas absorption. Heat resistance is above average. Sunlight resistance is excellent. It's abrasion resistance is not as good as natural rubber. Usually low permeability to gases.
A copolymer of isobutene and isoprene. As a sealant it has low recovery and slow cure, but good tensile strength and elongation.
A synthetic rubber with good electrical insulating properties.
A man-made rubber used for special applications. It has excellent resistance to heat, sunlight, weather, aging and ozone and is normally rated for 90°C.
Butyl rubber—also known as polyisobutylene (C4H8) is a synthetic rubber, a homopolymer of 2-methyl-1-propene. Polyisobutylene is produced by polymerization of about 98% of isobutylene with about 2% of isoprene. Structurally, polyisobutylene resembles polypropylene, having two methyl groups substituted on every other carbon atom.