teger of from 1 to 10; R is an alkenyl group containing from 8 to about 300 carbon atoms; and R' is an alkyl group containing from 8 to about 300 carbon atoms, D is selected from the group consisting (a) hydrogen (b) B; (c) alkyl, alkenyl, hydroxyalkyl and alkyl carboxy radicals having from 1 to about 100 carbon atoms; (d) aralkyl, aryl, alkaryl and hydroxyaryl radicals having from 1 to about 100