Patent ID: 6569974
Filing Date: 2003-05-27
Classification: C07F

Abstract:
A polymeric phosphinic acid or a salt thereof of the formula (I) in whichX is hydrogen cerium or a metal selected from the group consisting of a metal of group IA, IIA, IIIA, IVA, VA, IIB, IVB, VIIB, and VIIIB of the Periodic Table, R1 and R2 are identical or different and are hydrogen, a carboxyl group, a carboxylic acid ester or nitrile group, 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) â€ƒin which R1 and R2 have the abovementioned meaning, and {overscore (u)} is the average number of monomer units, and is at least 1.