. . "r a hydrocarbyloxy group, having from 1 to 20 carbon atoms: or a halogen atom, group and n has a value from 1 to 4; (B) at least one carboxylic acid represented by the formulas ##STR10## and wherein R1 is an aliphatic or a cycloaliphatic group or a sulfur, halogen or hydroxyl substituted aliphatic or cycloaliphatic group having from 1 to 72 carbon atoms, and (C) optionally in the presence of sodiu" . . .