Rubber compositions

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C - Chemistry, Metallurgy

08

L

400/6449

C08L 23/16 (2006.01) C08K 3/06 (2006.01) C08L 9/00 (2006.01)

Patent

CA 1333310

The present invention provides a rubber composition which comprises 100 parts by weight of ethylene. .alpha.-olefin.non-conjugated diene copolymer rubber, 5 - 40 parts by weight of solid diene rubber and 4 - 15 parts by weight of sulfur, the butadiene content of said solid diene rubber being 50 % by weight or more, the butadiene portions of said solid diene rubber having 40 % or more of 1,2 bonds based on all the bonds of said portion, and the ratio of weight-average molecular weight to number-average molecular weight being 2 or less. The rubber composition is a vulcanized rubber excellent in properties such as hardness and stength.

595069

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