Butyl rubber compositions

Details Butyl rubber compositions Butyl rubber compositions

C - Chemistry, Metallurgy

08

L

400/6441, 400/64

C08L 23/22 (2006.01) B60C 1/00 (2006.01) C08K 3/04 (2006.01) C08L 23/28 (2006.01)

Patent

CA 1332019

IMPROVED BUTYL RUBBER COMPOSITIONS Abstract of the Disclosure A new rubber composition, the vulcanizate of which has reduced permeability to gases, comprises: from about 70 to about 90 parts by weight of a high molecular weight butyl-type rubbery polymer; from about 10 to about 30 parts by weight of a low molecular weight butyl-type rubbery polymer, wherein the total amount of polymers described above is one hundred parts by weight; from about 30 to about 90 parts by weight of at least one carbon black; and a curing system.

571083

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