Liquid catalyst component, catalyst system containing said component and process for producing ethylene- -olefin copolymer using said catalyst system

Abstract From the Canadian patent

A liquid catalyst component for copolymerization of ethylene with .alpha.-olefin comprising a titanium compound represented by the following general formula: (R1R2N)4- (m+n)TiXmYn, wherein R1 and R2 each represents a saturated hydrocarbon group having 8 to 30 carbon atoms; X represents halogen; Y represents an alkoxy group; m represents a number satisfying 1? m?3; n represents a number satisfying 0 ? n ? 2; and (m+n) satisfies 1 ? (m+n) ? 3. The liquid catalyst component is used in combination with an organoaluminum compound as a catalyst system for copolymerization of ethylene with .alpha.-olefin.