Patent ID: 7459581

Claim:
A compound according to the formula I-a wherein R 1 is selected from OH, NH 2 and NH 3 + X − , wherein X is an inorganic anion, wherein R 2 is a singly-branched saturated or unsaturated aliphatic hydrocarbon moiety selected from C 7 -C 15 , wherein R 5 is selected from H, and a linear saturated or unsaturated aliphatic hydrocarbon moiety selected from C 6 -C 14 , and wherein R 2 and R 5 together have a total of 7 to 15 carbon atoms, and with the proviso that the ester compound is not selected from 2-ethylhexyl glycinate and ethylhexyl glycolate; optionally wherein R 5 is H and the compound is according to formula I-b wherein R 1 is selected from OH, NH 2 and NH 3 + X − , wherein X is an inorganic anion, and wherein R 2 is a singly-branched saturated or unsaturated aliphatic hydrocarbon moiety selected from C 7 -C 15 .