Ethylene-butadiene copolymerization with three-component catalyst systems Al[N(CH 3) 2] 3, Al(C 2H 5)Cl 2 and vanadium chlorides

Abstract

The ethylene butadiene copolymerization with systems of three components Al[N(CH 3) 2] 3, Al(C 2H 5)Cl 2 and VOCl 3 or VCl 4, is described. In the resulting copolymers, the butadiene units are substantially in trans-1,4 configuration. Although it is possible to obtain copolymers with a wide range of composition, attention was paid to products with a low content of unsaturation (less than 2% mole of butadiene). These copolymers are highly homogeneous. They show high crystallinity of the polyethylene type and they can be crosslinked with conventional sulphur recipes.