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Abstract

Disclosed is a catalyst composition and a method of polymerizing vinyl chloride using it. The catalyst composition is a mixture of a vanadyl (V) catalyst having the formula ##STR1## and about 0.5 to about 15 moles of an alkyl aluminum cocatalyst having the formula (R').sub.m Al(X').sub.3-m per mole of said catalyst, where R is a group containing 1 to 14 carbon atoms, each X is independently selected from halogen or OR, each R' is independently selected from alkyl from C.sub.1 to C.sub.10, each X' is independently selected from halogen, ##STR2## R.sub.1 is alkyl from C.sub.1 to C.sub.10, haloalkyl from C.sub.1 to C.sub.10, alkoxyalkyl where each alkyl group is independently selected from C.sub.1 to C.sub.10, or aryl from C.sub.6 to C.sub.14, m is 1 or 2, and n is 1 to 100. Also disclosed is a method of polymerizing vinyl chloride comonomer using this catalyst.

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