Oligomeric and polymeric aromatic phosphonic acids, their blends, processes for preparing them and uses as polyelectrolytes

US8609789B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Helmut Moehwald · Annweiler am Trifels, DE
• Thorsten Bock · Feldkirch, AT
• Rolf Muelhaupt · Glückstadt, DE

Key dates

• Filing date: Feb 12, 2007
• Grant date: Dec 17, 2013
• Expiry date: Nov 10, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E60/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to halogen-free, oligomeric or polymeric phosphonic acids made up of units of the general formula (I)—[(O)m—{R1(X)n(Y)o}pR1(X)q]r—[(O)s—R5(X)t]v—  (I),where:where the radicals X are substituents on R1 and R5 and the radicals Y are parts of polymer or oligomer chain, to a process for preparing these compounds and also to halogen-free mixtures comprising one or more compounds of the general formula (I) and a nitrogen-free solvent having a boiling point of >150° C.