Patent ID: 8637659

Claim:
A disaccharide derivative, wherein the derivative is of formula: wherein (i) at least 3, but not more than N−1, of the groups R are fatty acid ester groups, wherein each of the fatty acid ester groups is represented by: a formula of —C(═O)—(CH 2 ) x CH 3 groups, wherein x is between 6 and 14, and (ii) at least one, but no more than N−3, of the groups R are anionic —SO 2 —OR 1 groups, wherein R 1 is a monovalent cation, wherein N is the number of groups R of the disaccharide derivative and wherein the combined number of fatty acid esters and anionic —SO 2 —OR 1 groups does not exceed N and the remaining groups R are hydrogen.