Polymeric phosphinic acids and salts thereof

US6727335B2 · kind B2 · utility

Assignee

• Clariant Corporation · DE

Inventors

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

Key dates

• Filing date: Apr 17, 2003
• Grant date: Apr 27, 2004
• Expiry date: Apr 17, 2023

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)—CR1═CHR2  (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.