Elastomeric composition having increased ozone resistance
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United States of America Patent
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Jun 27, 1989
Issued Date -
N/A
app pub date -
Jun 1, 1988
filing date -
May 23, 1986
priority date (Note) -
Expired
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Abstract
An elastomeric composition formed by curing a blend comprised of (A) between about 70 and about 94 phr of a highly unsaturated rubber; (B) between about 3 and about 27 phr of ethylene/propylene/nonconjugated diene terpolymer having a number average molecular weight of more than about 35,000; (C) between about 3 and about 27 phr of ethylene/propylene/nonconjugated diene terpolymer having a number average molecular weight of between about 500 and about 15,000; between about 2 and about 7.5 phr of a quinoline antioxidant; and (D) an effective amount of curative exhibit unexpectedly desirable ozone resistance. Also disclosed is a process for preparing such elastomeric compositions.
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