The compounds represented by the formula ##STR79## where x is an integer of 1 to about 10; y is an integer of 1 to about 12; j is an integer of 0 or 1; said q is an integer of 2 to about 10; said R' is selected from the group consisting of hydrogen, fluorine, chlorine, and perfluoromethyl; and said Cq H2q is linear or branched.