Patent ID: 8221658

Claim:
A mixed salt of diorganylphosphinic acids and carboxylic acids of the formula [cation n+ (phosphinate − ) x (carboxylic acid anion z− 1/z ) y ] wherein n=from 1 to 4 x=from 0.01 to n−0.01 y=n−x z=from 1 to 4, wherein the cation is an element of the second main and/or transition group, an element of the third main and/or transition group, an element of the fourth main and/or transition group, an element of the fifth main and/or transition group, an element of the sixth transition group, an element of the seventh transition group, and/or an element of the eighth transition group or a combination thereof, the phosphinate is an anion of diorganylphosphinic acids of the formula wherein R 1 and R 2 are identical or different and, independently of one another, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, phenyl, hydroxymethyl, hydroxyethyl or hydroxypropyl, and carboxylic acid anion is a C 1 -C 18 carboxylic acid anion.