Preparation of polyaryl ethers with nitrogen compound catalysts

US5298592A · kind A · utility

Assignee

• BASF SE

Inventors

• Alexander Aumueller · Deidesheim, DE
• Wolfgang Eberle · Mainz, DE
• Gerhard Heinz · Bad Dürkheim, DE
• Bernd Hupfeld · Gifhorn, DE
• Christiane Husemann · Neustadt, DE
• Juergen Koch · Schifferstadt, DE
• Helmut Reichelt · Neustadt, DE

Key dates

• Filing date: Aug 20, 1992
• Grant date: Mar 29, 1994
• Expiry date: Aug 20, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/4087
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing polyaryl ethers of the formula I or Ia ##STR1## by condensation of at least one appropriate bisphenol with at least one appropriate aromatic dichloride in the presence of an alkali metal carbonate in a dipolar aprotic solvent, is carried out in the presence of a catalyst selected from the alkali metal nitrites and the group of compounds of the formula II ##STR2## where r.sup.1 and r.sup.3 are each hydrogen, C.sub.7 -C.sub.16 -phenylalkyl, C.sub.1 -C.sub.12 -alkoxy, fluorine, chlorine, bromine, iodine or nitro, and R.sup.2 is nitro or nitroso, or ##STR3## where R.sup.4 is hydrogen, C.sub.1 -C.sub.4 alkyl, fluorine, chlorine, bromine or iodine.