Polyarylene ethers containing xanthone units, a process for their preparation, and their use

US5395914A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Peter Wilharm · Meitingen, DE
• Thomas Weller · Mainz, DE
• Michael Meier · Frankfurt am Main, DE

Key dates

• Filing date: May 26, 1993
• Grant date: Mar 7, 1995
• Expiry date: May 26, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C49/83
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Polyarylene ethers that contain xanthone units and have a very high heat resistance can be prepared from inexpensive, readily accessible monomers by polycondensation in a basic medium under essentially anhydrous conditions in the presence or absence of an aromatic solvent at temperatures of from 150.degree. to 400.degree. C. Xanthone monomers and also hydroxyhalogen-substituted benzophenone compounds may be used as starting materials.