"ounds having the formula: wherein R is a hydrocarbon group containing from 1 to about 24 carbon atoms, wherein each R group is a hydrocarbon group containing from 1 to about 4 carbon atoms, wherein X is selected from the group consisting of chlorine, iodine, and bromine atoms, wherein L, m and n are integers such that L is an integer from 0 to about 50, the sum of m and n is from 2 to about 50, an" . . . .