The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 1983
Filed:
Jun. 04, 1982
Lacey E Scoggins, Bartlesville, OK (US);
Bradley L Munro, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A method for recovering granular poly(arylene sulfide) from a polymerization reaction mixture at a temperature above that at which poly(arylene sulfide) is in molten phase comprising polar organic solvent and poly(arylene sulfide) in which, in the presence of a sufficient amount of separation agent to cause a phase separation of molten poly(arylene sulfide) and polar organic solvent, the temperature of the polymerization reaction mixture is reduced sufficiently to solidify the poly(arylene sulfide) to produce a slurry comprising particulate poly(arylene sulfide) in polar organic solvent. In a preferred embodiment a slurry comprising particulate poly(phenylene sulfide) in N-methyl-2-pyrrolidone is produced using water, and optionally an alkali metal carboxylate, as separation agent.