Impact-resistant thermoplastic composition based on graft copolymer
Patent 4202948 Issued on May 13, 1980. Estimated Expiration Date: 
September 26, 1997. 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 26, 1997. 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 3538190 3538192 3657395 3671608 3819765 3849518 3893968 InventorAssigneeApplicationNo. 05/836643 filed on 09/26/1977US Classes:525/70, Mixing of solid graft or graft-type copolymer derived from ethylenic reactants only with other solid polymer derived from ethylenic reactants only; or treating said mixture with chemical treating agent; or processes of forming or reacting; or the resultant product of any of the above operations525/77Mixture contains solid polymer derived from reactant containing nitrogen other than from (meth)acrylonitrileExaminersPrimary: Ziegler, J.Attorney, Agent or FirmInternational ClassesC08F 255/00 (20060101)C08L 57/00 (20060101) C08L 51/00 (20060101) C08L 51/04 (20060101) C08L 23/00 (20060101) C08L 23/16 (20060101) C08F 255/06 (20060101) AbstractA thermoplastic composition characterized by high impact strength and flex-resistance, based on a graft copolymer of resin-forming monomer (e.g., styrene-acrylonitrile) on EPDM type of rubber (especially a terpolymer of ethylene, propylene and 5-ethylidene-2-norbornene) having a Mooney viscosity of at least 55 ML-4 at 257° F. and an iodine number of at least 15. | |
