Polymeric phosphinic acids and salts thereof

US6569974B1 · kind B1 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Martin Sicken · Cologne, DE
• Norbert Weferling · Hürth, DE
• Hans-Peter Schmitz · Mönchengladbach, DE

Key dates

• Filing date: Mar 22, 2000
• Grant date: May 27, 2003
• Expiry date: Mar 22, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F9/485
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to polymeric phosphinic acids and their salts of the formula (I) in whichX is hydrogen or a 1/m metal of valency m,R1 and R2 are identical or different and are hydrogen, a carboxyl group, a carboxylic acid derivative, an unsubstituted or substituted alkyl group having 1 to 10 carbon atoms, phenyl, benzyl or alkyl-substituted aromatics,R3 and R4 are identical or different and are hydrogen or a vinyl group of the formula (VI)  in which R1 and R2 have the abovementioned meaning, and {overscore (u)} is the average number of monomer units. The invention also relates to a process for the preparation of the abovementioned compounds and their use.