Rubber compositions

Details Rubber compositions Rubber compositions

1989-03-20

1990-09-11

Seccuro, Carman J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525211, 525237, 5253318, C08L 900, C08L 2316, C08L 2326, C08L 2332

Patent

active

049564137

ABSTRACT:
The present invention provides a rubber composition which comprises 100 parts by weight of ethylene.multidot..alpha.-olefin.multidot.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 strength.

REFERENCES:
patent: 3359221 (1967-12-01), Schoenbeck
patent: 3451962 (1969-06-01), Auler et al.
patent: 3891724 (1975-06-01), Yaeda et al.
patent: 4089820 (1978-05-01), Wright
patent: 4137350 (1979-01-01), Blaskiewicz et al.

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