Nitrile rubber/EPDM graft blends
Patent 4397987 Issued on August 9, 1983. Estimated Expiration Date: 
September 23, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 23, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3489821 3538192 3897405 Graft copolymers and process for producing same Patent #: 3981958 InventorAssigneeApplicationNo. 06/422063 filed on 09/23/1982US Classes:525/75, Mixture contains solid polymer derived from reactant containing a fused- or bridged-ring system or from cycloaliphatic reactant525/66, With solid polymer derived from at least one nitrogen-containing reactant wherein at least one of the reactants forming the solid polymer is saturated; or with SPFI wherein at least one of the necessary ingredients contains a nitrogen atom or with a reaction product thereof; or with nitrogen-containing SICP525/69, Solid graft or graft-type copolymer contains backbone derived from ethylenic reactants only525/72, Mixture contains solid polymer derived from reactants containing an atom other than C, H, O, N, or chlorine525/76, Mixture contains solid polymer derived from chlorine-containing reactant other than from vinyl(idene) chloride525/78, Mixture contains solid polymer derived from reactant containing carboxylic acid group525/84, Polymer substrate derived from hydrocarbon reactants only525/86, Mixture contains solid polymer derived from nonaromatic reactant containing plural ethylenically unsaturated groups525/87Solid polymer other than graft or graft-type derived from nonaromatic plural ethylenically unsaturated reactantExaminersPrimary: Seccuro, Carman J.Attorney, Agent or FirmInternational ClassesC08L 51/06 (20060101)C08L 51/00 (20060101) C08L 9/02 (20060101) C08L 9/00 (20060101) C08L 21/00 (20060101) AbstractOil 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.Field of SearchMixture contains solid polymer derived from reactants containing an atom other than C, H, O, N, or chlorineMixture contains solid polymer derived from reactant containing a fused- or bridged-ring system or from cycloaliphatic reactant Solid polymer other than graft or graft-type derived from nonaromatic plural ethylenically unsaturated reactant | |
