Heat and ozone resistant NBR/epichlorohydrin blends

Details Heat and ozone resistant NBR/epichlorohydrin blends Heat and ozone resistant NBR/epichlorohydrin blends

1994-06-13

1995-09-05

Bleutge, John C.

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

Synthetic resins

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

525263, 525293, 525296, 5253325, 5253338, 525404, 525942, C08L 7102

Patent

active

054479924

ABSTRACT:
Cured blends of acrylonitrile/butadiene (NBR)/epichlorohydrin rubbers are provided that are free of poisonous lead compounds with ozone resistance of 10 hours or more and good heat resistance and fuel and oil resistance. These acrylonitrile/butadiene rubbers contain 28 to 33% by weight of acrylonitrile. The epichlorohydrin rubbers are useful in this invention which contains at least 4 to 12% of allyl glycidyl ether and may contain 0 to 35% of ethylene oxide, preferably 2 to 6% and up to 15%. The acrylonitrile/butadiene rubber is preferably of so-called bound antioxidant type which contains about 1 to about 10% by weight of polymerized attached antioxidant containing monomer.

REFERENCES:
patent: 4197382 (1980-04-01), Fukushima et al.
patent: 4251648 (1981-02-01), Oetzel
patent: 4297453 (1981-10-01), Coran et al.
patent: 4408013 (1983-10-01), Barnhouse
patent: 4661563 (1987-04-01), Sasaki et al.
patent: 4775716 (1988-10-01), Kipouras et al.
patent: 4857590 (1989-08-01), Gaggar et al.
patent: 4885341 (1989-12-01), Aonuma et al.
patent: 4942906 (1990-07-01), Igarashi et al.
"Bound Antioxidant Stabilized NBR in Automotive Applications" James W. Horvath, Elastomerics, Aug., 1979.

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