Process for the production of high molecular weight, optionally branched polyarylene sulfides

US5037952A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Schmidt · Krefeld, DE
• Erhard Tresper · Krefeld, DE
• Wolfgang Alewelt · Krefeld, DE
• Ernst-Ulrich Dorf · Krefeld, DE
• Wolfgang Russeler · Krefeld, DE

Key dates

• Filing date: Nov 13, 1989
• Grant date: Aug 6, 1991
• Expiry date: Nov 13, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G75/025
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulfides having a low content of organically bound halogen. They are prepared by reaction of alkali sulfides and/or alkali hydrogen sulfides with aromatic dihalogen compounds in a polar organic solvent.