Halobutyl elastomeric compositions

Details Halobutyl elastomeric compositions Halobutyl elastomeric compositions

C - Chemistry, Metallurgy

08

L

400/6499

C08L 23/28 (2006.01) C08K 3/04 (2006.01) C08L 23/22 (2006.01) C08L 25/16 (2006.01) C08L 91/00 (2006.01)

Patent

CA 1308213

HALOBUTYL ELASTOMERIC COMPOSITIONS Abstract of the Disclosure A new rubber composition, the vulcanizate of which has reduced permeability to gases, comprises: one hundred parts by weight of at least one butyl-type rubbery polymer; from about 3 to about 20 parts by weight of .alpha.-methylstyrene homopolymer having a softening point of from about 93°C to about 150°C and a Tg of from about 15°C to about 75°C; from about 30 to about 90 parts by weight of at least one carbon black, from 0 to about 7 parts by weight of hydrocarbon extender oil; and a curing system. A process for producing said rubber composition is also provided. The compositions are suitable for use in the production of pneumatic tire inner liners.

563901

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