Rubber compositions having reduced permeability to air

Details Rubber compositions having reduced permeability to air Rubber compositions having reduced permeability to air

C - Chemistry, Metallurgy

08

K

152/76, 400/9063

C08K 13/02 (2006.01) B60C 1/00 (2006.01) C08K 3/04 (2006.01) C08L 23/22 (2006.01)

Patent

CA 1328702

RUBBER COMPOSITIONS HAVING REDUCED PERMEABILITY TO AIR Abstract of the disclosure An improved rubber composition for use in articles requiring reduced permeability to air, comprises: one hundred parts by weight of a terpolymer of isobutylene, isoprene and ?-methylstryrene, from about 30 to about 90 parts by weight of at least one carbon black, and a curing system, wherein the terpolymer comprises from about 0.5 to about 2 mole percent of isoprene, from about 2 to about 7 mole percent of ?-methylstyrene and from about 91 to about 97.5 mole percent of isobutylene.

583050

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