Process for making membranes

US10441925B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Martin Weber · Maikammer, DE
• Nicole Janssen · Bermersheim, DE
• Hartwig Voss · Bischofswerda, DE
• Jacek Malisz · Weil am Rhein, DE
• Martin HEIJNEN · Landsberg am Lech, DE
• Edoardo Menozzi · Basel, CH

Key dates

• Filing date: Jul 30, 2015
• Grant date: Oct 15, 2019
• Expiry date: Feb 16, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2481/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Process for making a membrane M comprising the following steps: a) preparing a copolymer C, wherein said copolymer C comprises blocks of at least one polyarylene ether A and blocks of polyalkylene oxide PAO, wherein the content of polyethyleneoxide in copolymer C is 30 to 90% by weight and wherein copolymer C is prepared in a solvent L to yield solution S; b) providing a dope solution D comprising at least one polymer P; c) mixing solution S and dope solution D; d) preparing a membrane by bringing the mixture of solution S and dope solution D into contact with at least one coagulating agent.