Process for the isolation of polyarylene sulphide

US4639507A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Alewelt · Krefeld, DE
• Wolfgang Eisermann · Goldkronach, DE
• Karl-Heinrich Meyer · Krefeld, DE
• Erhard Tresper · Krefeld, DE
• Martin Ullrich · Leverkusen, DE

Key dates

• Filing date: Sep 3, 1985
• Grant date: Jan 27, 1987
• Expiry date: Sep 3, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G75/0281
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The isolation of polyarylene sulphides by freeing polyarylene sulphides of the type obtained in customary production processes from adherent water and any other volatile constituents by treating the polyarylene sulphides in screw machines and optionally melting them either simultaneously or subsequently.