Patent ID: 8765644

Claim:
A compound of formula (A) Y{O(CH 2 ) e } a {NX(CH 2 ) e } b {N[C(O)R 2 ](CH 2 ) e } c {NH(CH 2 ) e } d NHZ (A) wherein a is an integer of from 0-5, b and c are each independently selected from integers of from 0 to 10, with the proviso that b and c cannot both be 0 at the same time, d is an integer of from 0 to 10, e is an integer of from 1-5, Y is selected from H, X, —C(O)R 1 or —C(O)R 2 and Z is selected from —C(O)R 1 or X, wherein R 1 and R 2 are linear or branched, saturated or unsaturated hydrocarbyl groups having from 7 to 30 carbon atoms, and X is a carbonyl group derived from an acid comprising a C 2 -C 10 hydrocarbon chain, said acid being selected from the group consisting of C 2 -C 10 monocarboxylic acids, C 2 -C 10 dicarboxylic acids, tricarboxylic acids containing C 2 -C 10 hydrocarbyl groups, and mixtures thereof.