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:
Jun. 11, 1991
Filed:
Apr. 18, 1990
Joseph G Ceurvorst, Arvada, CO (US);
Phillips Peteroleum Company, Bartlesville, OK (US);
Other;
Abstract
A process for preparing arylene sulfide polymers which comprises the steps of contacting at least one alkali metal hydroxide, water and at least one lactam to form a first mixture comprising an alkali metal aminoalkanoate, water and lactam, and subsequently contacting said first mixture with at least one sulfur source selected from the group consisting of alkali metal bisulfides, thiolactams, and hydrogen sulfide under reaction conditions of time and temperature sufficient to produce a second mixture comprising a polymerizable complex of an alkali metal aminolkanoate and the sulfur source, lactam, water and metal impurities; separating at least a portion of the metal impurities from the second mixture to form a third mixture; contacting at least one dihaloaromatic compound with the third mixture to produce a polymerization mixture; subjecting the polymerization mixture to polymerization conditions of time and temperature sufficient to produce the arylene sulfide polymer; and recovering the arylene sulfide polymer. In a further embodiment, the second mixture may be dehydrated prior to separating at least a portion of the metal impurities from the second mixture, or the third mixture may be dehydrated prior to contacting the third mixture with the dihaloaromatic compound.