Patent ID: 7435845

Claim:
A compound of formula (1) where R 1 , R 2 are each independently C 1 - to C 22 -alkyl, C 2 - to C 22 -alkenyl, C 6 - to C 30 -aryl or C 7 - to C 30 -alkylaryl, R 3 is C 1 - to C 22 -alkyl, C 2 - to C 22 -alkenyl, C 6 - to C 30 -aryl or C 7 - to C 30 -alkylaryl, —CHR 5 —COO − or —O − , R 4 is M, hydrogen or an organic radical having from 1 to 100 carbon atoms, B is a straight-chain or branched C 1 - to C 10 -alkylene group, D is an ethylene group substituted by an organic radical having from 1 to 600 carbon atoms, X, Y are each independently O or NR 6 , R 5 , R 6 are each independently hydrogen, C 1 - to C 22 -alkyl, C 2 - to C 22 -alkenyl, C 6 - to C 30 -aryl or C 7 - to C 30 -alkylaryl, and M is a cation.