RO(CH2 CH2 O)k CH2 COO- M+ wherein R is a C8-22 alkyl group, k is an integer ranging from 0 to 10, and M is a cation; and polyhydroxy fatty acid amides having the general formula: ##STR4## wherein R1 is H, a C1-4 alkyl group, 2-hydroxy ethyl, 2-hydroxy propyl, or mixtures thereof, R2 is a C5-31 hydrocarbyl, and Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxy