Phosphonic acid-containing blends and phosphonic acid-containing polymers

US8637174B2 · kind B2 · utility

Assignee

• Thomas Häring · DE

Inventors

• Thomas Häring · Stuttgart, DE
• Jochen Kerres · Esslingen am Neckar, DE
• Frank Schönberger · Saarlouis, DE
• Martin Hein · Stuttgart, DE

Key dates

• Filing date: Feb 5, 2007
• Grant date: Jan 28, 2014
• Expiry date: Oct 8, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Various blends and blend membranes from low-molecular hydroxymethylene-oligo-phosphonic acids R—C(PO3H2)x(OH)y and polymers, the group R representing any organic group, the polymers containing cation exchanger groups or their nonionic precursors of the type SO2X, X being a halogen, OH, OMe, NR1R2, OR1 with Me being any metal cation or ammonium cation, R1, R2 being H or any aryl- or alkyl group, PDX2, COX and/or basic groups such as primary, secondary or tertiary amino groups, imidazole groups, pyridine groups, pyrazole groups etc. and/or OH groups. Such membranes may also include polymers that are modified with the 1-hydroxymethylene-1,1-bisphosphonic acid group. The polymers may be formed by reacting polymers which contain carboxylic acid groups or carboxylic halide groups —COHal (Hal=F, Cl, Br, I) with phosphite compounds or by reacting polymeric aldehydes or polymeric keto compounds with phosphite esters while carrying out an amine catalysis, an oxidation of the intermediary hydroxyphosphonic acid with MnO2 or another oxidant.