ally saturated and unsaturated C12 -C18 monoesters), diesters of sulfosuccinate (especially saturated and unsaturated C6 -C14 diesters), N-acyl sarcosinates, sulfates of alkylpolysaccharides such as the sulfates of alkylpolyglucoside, branched primary alkyl sulfates, alkyl polyethoxy carboxylates such as those of the formula RO(CH2 CH2 O)k CH2 COO- M+ wherein R is a C8 -C22 alkyl, k is an integer