Process for producing aromatic polyether sulfones

US9045598B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Faissal-Ali El-Toufaili · Ludwigshafen, DE
• Achim Stammer · Freinsheim, DE
• Simon Gramlich · Ludwigshafen am Rhein, DE
• Angela Ulzhöfer · Ludwigshafen, DE

Key dates

• Filing date: Sep 3, 2013
• Grant date: Jun 2, 2015
• Expiry date: Sep 3, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G75/23
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The process for producing aromatic polyether sulfones via reaction of a dichlorodiphenyl sulfone component with a bisphenol component as monomers in the presence of alkali metal carbonate in the melt in the absence of solvents and diluents comprises carrying out the reaction in a mixing kneader which is operated with a shear rate in the range from 5 to 500 s−1.