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US 4,397,987 AGranted
Nitrile rubber/EPDM graft blends
AssigneeUniroyal, Inc.
InventorRobert J. Cornell
Life of this patent
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Abstract
Oil resistant, ozone resistant polymer blends are prepared by blending an Acrylonitrile/Butadiene polymer with an EPDM polymer which has had grafted onto it a polymer prepared by polymerizing onto the backbone a methacrylate monomer. The preferred EPDM graft polymer is a methylmethacrylate grafted onto the EPDM backbone.
Claims5
An elastomeric vulcanizable composition consisting essentially of:
- from 50 to 90 parts, by weight, butadiene-acrylonitrile copolymer elastomer and
- from 10 to 50 parts by weight, ethylene-propylene-non-conjugated diene terpolymer elastomer grafted with a monomer selected from the group consisting of alkyl acrylate and alkyl methacrylate wherein said alkyl radical in said monomer includes 1-4 carbon atoms;
- wherein said total elastomeric content of said composition is in the range of 80 and 99.5% by weight.
Dependencies are inferred from the claim text.