where R2 is a C.sub.(6-14) divalent aromatic radical selected from hydrocarbon radicals and halogenated hydrocarbon radicals, and Q is a divalent organo radical selected from ##STR3## where a is 0 or 1, y is an integer having a value from 1-5 inclusive, and R3 is monovalent hydrocarbon radical selected from methyl or phenyl.