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AssigneeThe Goodyear Tire & Rubber Company
InventorsKirkwood S. Cottman, Kevin L. Rollick
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Free radically curable rubbers are crosslinked with the aid of a free radical initiator and a co-curing agent, which is an acrylate or methacrylate ester of a hydroxybenzene or hydroxynaphthalene compound containing two or more hydroxyl groups, at least two of which are esterified. The rubbers which are used in the present invention are natural rubber and synthetic rubbers derived from a diene monomer. Preferred co-curing agents are acrylate and methacrylate esters of hydroxybenzene compounds in which the ester contains two or three acrylate or methacrylate groups per molecule. The amount of co-curing agent may be about 1-50 parts by weight per one hundred parts by weight of rubber (phr). Outstanding abrasion resistance and air oven aging are observed.
A process for free radical curing of a polymer or mixture thereof which comprises using a free radical initiator and as a co-curing agent an acrylate or methacrylate ester of a hydroxybenzene or hydroxynaphthalene compound, wherein said ester contains at least two acrylate or methacrylate groups per molecule, or a mixture thereof wherein said polymer is selected from the group consisting of ethylene-propylene-diene terpolymer, natural polyisoprene rubber, synthetic polyisoprene, styrene isoprene rubber, styrene butadiene rubber, styrene isoprene butadiene rubber, polybutadiene rubber, nitrile rubber, partially hydrogenated nitrile rubber, polychloroprene and mixtures thereof.
A process according to claim I wherein the free radical initiator is an organic free radical precursor.
A free radical curable polymer composition comprising:
Dependencies are inferred from the claim text.