Sulfur co-vulcanizable epdm and hydrogenated nbr blends

Details Sulfur co-vulcanizable epdm and hydrogenated nbr blends Sulfur co-vulcanizable epdm and hydrogenated nbr blends

C - Chemistry, Metallurgy

08

L

400/6456

C08L 9/02 (2006.01) C08L 15/00 (2006.01) C08L 23/16 (2006.01)

Patent

CA 1196443

ABSTRACT The invention provides a rubber composition co-vulcanizable with a sulfur cure system, the composition comprising 95 to 20% by weight of a partially hydrogenated unsaturated nitrile-conjugated diene copolymer rubber in which at least 50% of units derived from the conjugated diene are hydrogenated, 5 to 80% by weight of an ethylene-propylene-nonconjugated diene terpolymer rubber, and a required amount of at least one vulcanization accelerator selected from the group of thiuram accelerators and dithiocarbamate accelerators. The rubber composition of the invention exhibits the excellent oil and ozone resistance of its two rubber components and shows a higher tensile strength and heat aging resistance than that which would have been brought about by the mixing of the two rubbers. The rubber composition is particularly useful in such areas that require the above properties, for example, automotive brake hoses, automotive radiator hoses, transmission belts, conveyer belts, sheets and rolls.

410575

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