Heat and ozone resistant nbr/epichlorohydrin blends

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

C - Chemistry, Metallurgy

08

L

C08L 9/02 (2006.01) C08L 63/00 (2006.01) C08L 71/03 (2006.01)

Patent

CA 2130599

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.

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