Reactively capped polyarylene sulfide and method and intermediates for their preparation
November 19, 2010. 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 3793256 Process for the production of polyarylene sulphides Process for the production of polyarylene sulphides with functional end groups Process for the production of polyarylene sulphides with functional end groups Polyarylene sulfide block copolymers, method for making, and use Polyphenylene sulfide containing covalently bonded chlorine in a reduced amount Blends of copoly(arylene sulfide) and poly(arylene sulfide) Patent #: 4877851 InventorsApplicationNo. 614967 filed on 11/19/1990US Classes:525/537, Solid polymer derived from alkali metal sulfide and halogenated aromatic reactant, e.g., polyarylene sulfide, etc.528/481Treating at O Deg C (32 Deg F) or below, or at 200 Deg C (392 Deg F) or aboveExaminersPrimary: Marquis, Melvyn I.Assistant: Woodward, David W. Attorney, Agent or FirmForeign Patent References
International ClassC08G 075/02AbstractPolyarylene sulfides react with disulfides containing reactive functional groups, typically at temperatures within the range of about 225°-375° C., yielding reactively capped polyarylene sulfides. The preferred reactive functional groups are amino groups and carboxy groups and functional derivatives thereof.Other References
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