Preparation of polyaryleneetherketones

US5081215A · kind A · utility

Assignee

• BASF SE

Inventors

• Juergen Koch · Schifferstadt, DE
• Wolfgang Stegmaier · Haßloch, DE
• Gerhard Heinz · Bad Dürkheim, DE

Key dates

• Filing date: Aug 15, 1989
• Grant date: Jan 14, 1992
• Expiry date: Aug 15, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G61/127
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyaryleneetherketones are prepared by a quasicontinuous process, by Friedel-Crafts polycondensation of a reaction mixture containing PA0 A. a monomer system of PA1 (a) PA2 (1) an aromatic dicarboxylic acid chloride or phosgene and PA2 (2) a polynuclear aromatic having two exchangeable hydrogen atoms and/or PA1 (b) a polynuclear aromatic carboxylic acid chloride having one exchangeable hydrogen atom, PA0 B. a Lewis acid, PA0 C. if necessary, a Lewis base and PA0 D. an inert solvent. The reaction mixture is subjected to polycondensation in a first zone, with stirring, to a viscosity of not more than 2,000 mPa.s, then conveyed through a second, vertical, unstirred zone with plug flow by means of gas pressure, where the polycondensation is completed, and is finally discharged continuously.