Process for the oxidation of polyarlene compounds containing thioether groups

US5891988A · kind A · utility

Assignee

• Ticona LLC · US

Inventors

• Helmut Scheckenbach · Langen (Hessen), DE
• Klaus Delpy · Dietzenbach, DE
• Stefan Disch · Goldbach, DE

Key dates

• Filing date: Sep 9, 1997
• Grant date: Apr 6, 1999
• Expiry date: Sep 9, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G75/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The process for the preparation of polyarylene sulfones by oxidation of polyarylene sulfides with an oxidizing agent in the presence of a liquid is carried out under reduced pressure so that the liquid boils. The reaction temperature can easily be kept constant in the process.