A process for preparing ethylene copolymers.

摘要

A process for preparing ethylene copolymers which comprises copolymerizing a predominant amount of ethylene with a minor amount of an alpha -olefin containing at least three carbon atoms, in the presence of a catalyst composed of: (A) a non-prepolymerization treated titanium-containing catalyst component obtained by treating a solid titanium composition (a) containing at least magnesium, titanium and halogen and optionally containing less than 2 mols of an electron donor per gram-atom of the titanium, with 0.1 to 10 mols of an organoaluminum compound (b) per gram-atom of titanium in said composition (a), the halogen/aluminum (atomic ratio) in said compound (b) being not more than 1, and (B) an organoaluminum compound catalyst component.