Process for the purification of polyarylene sulphides

US5247063A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Alewelt · Krefeld, DE
• Franz Alfes · Krefeld, DE
• Wolfgang Eisermann · Goldkronach, DE
• Erhard Tresper · Krefeld, DE

Key dates

• Filing date: Jun 12, 1992
• Grant date: Sep 21, 1993
• Expiry date: Jun 12, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G75/0254
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to a process for the purification of optionally branched polyarylene sulphides (PPS). Polyarylene sulphides which have been purified according to the invention are distinguished by the reduced amount of ash-forming impurities contained in them.