ower alkoxy carboxylic acid of the formula R2 O(X)n YCOOH, wherein R2 is C9-15 alkyl, n is from 4 to 12, and Y is CH2, C(O)R3 or ##STR1## wherein R3 is a C1-3 alkylene, or a lower alkyl mono-, di-, or tri-ester of phosphoric acid, wherein the lower alkyl is of 1 to 4 carbon atoms, or any mixture thereof.