Curable ethylene/alpha-monoolefin/diene polymer-unsaturated rubbery polymer blends

Abstract

Abstract Sulfur curable ethylene/alpha-monoolefin/nonconjugated diene terpolymer-unsaturated rubbery polymer blends are prepared by hot-mixing an ethylene/alpha-monoolefin/nonconjugated diene polymer, e.g., ethylene/propylene/nonconjugated diene terpolymer rubber (EPDM), e.g., ethylene/propylene/1,4-hexadiene terpolymer, preferably containing any filler to be used, with a promoter, e.g., elemental sulfur, an aromatic dinitroso compound, e.g., p-dinitrosobenzene, a quinonoid nucleus containing compound, e.g., p-quinone dioxime, etc., at about 250°-450° F. for about 1-15 minutes, to improve its cure rate relative to that of an elastomer with which it is to be blended, i.e., its compatibility (vulcanizate properties), and then blending the thus treated material together with an unsaturated rubbery material or elastomer, e.g., styrene/butadiene elastomer to provide products useful in producing, as by vulcanization, various rubbery products, e.g., tire sidewalls, radiator hose, windshield wiper blades, shoe soles, heels, etc.

Inventors

• 👤 Roy F. Wright

Bibliographic Details