Process for the production of high molecular weight, optionally branched polyarylene sulfides having reduced content of extractable oligomers

US5055551A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Schmidt · Krefeld, DE
• Wolfgang Arlt · Hohen Neuendorf, DE
• Erhard Tresper · Krefeld, DE
• Wolfgang Russeler · Krefeld, DE

Key dates

• Filing date: Nov 13, 1989
• Grant date: Oct 8, 1991
• Expiry date: Nov 13, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G75/0231
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulfides having a reduced content of extractable oligomeric constituents. They are prepared by reaction of alkali sulfides and/or alkali hydrogen sulfides with aromatic dihalogen compounds in a polar organic solvent.