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US 6,437,091 B1Granted
Pulse continuous curing of poly(arylene sulfide) polymers
AssigneePhilips Petroleum Company
InventorsJeffrey S. Fodor, Aubrey South, Jr., Fernando C. Vidaurri, Jr.
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Abstract
A process is provided for curing poly(arylene sulfide) polymers by achieving and maintaining curing conditions in a cure vessel, then intermittently adding uncured polymer to said cure vessel and intermittently removing polymer from the cure vessel wherein the removal of polymer from the cure vessel is performed at intervals such that the presence of uncured polymer is minimized or avoided.
Claims8
A process for curing a poly(arylene sulfide) polymer which comprises:
- (a) achieving and maintaining in a single cure vessel curing conditions sufficient to cause a poly(arylene sulfide) polymer to undergo a decrease in extrusion rates while intermittently adding to said single cure vessel a portion of uncured polymer and removing a portion of polymer where said removal of said portion of polymer is performed at intermittent intervals such that the extrusion rate of said portion of polymer that is removed reaches a steady value and said portion is less than the entire polymer content of the single cure vessel.
Dependencies are inferred from the claim text.