Modification of polymers with basic N-groups and ion exchange groups in the lateral chain

US6590067B2 · kind B2 · utility

Assignee

• UNIVERSITAT STUTTGART · DE

Inventors

• Jochen Kerres · Esslingen am Neckar, DE
• Andreas Ullrich · Eßlingen, DE
• Thomas Häring · Stuttgart, DE

Key dates

• Filing date: Feb 12, 2001
• Grant date: Jul 8, 2003
• Expiry date: Feb 12, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A20/124
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for lateral chain modification of aryl main chain polymers with aromatic ketones or aldehydes containing tertiary basic N-groups is described. The modification can be accomplished via addition of an aromatic carboxylic acid or an acid derivative containing a tertiary amine moiety to a metallized polymer. The tertiary amines on the modified polymer can be converted to quaternary amines with halogen alkanes. Modification of the aryl main chain polymers with aromatic groups containing sulphonic acid radicals is also described. The polymers formed can be crosslinked and prepared for use in a wide variety of membrane technologies including ion exchange, dialysis, reverse osmosis, nanofiltration.