Patent ID: 7820850

Claim:
A mixture comprising compounds of the formula RO—PO(A)-CH 2 —CH 2 —CO 2 H and (I) HO—PO(A)-CH 2 —CH 2 —CO 2 R (II) wherein A is C 1 -C 18 -alkyl, C 6 -C 18 -alkylaryl, C 6 -C 18 -aralkyl or aryl, R is (D,E)C═C(B, R 5 ) B, D, E are identical or different and are each H or C 1 -C 18 -alkyl R 5 is a saturated, unsaturated or polyunsaturated C 1 -C 20 -(—CO—O-hydroxyalkylene).