Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins at temperatures above 140.degree. C. are provided by reacting a transition metal compound such as tetra(isopropoxy)titanium, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum, e.g., di-n-butylmagnesium.x triethylaluminum and a hydrogen halide or an active hydrocarbyl halide such as t-butyl chloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.

Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins at temperatures above 140.degree. C. are provided by reacting a transition metal compound such as tetra(isopropoxy)titanium, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum, e.g., di-n-butylmagnesium.x triethylaluminum and a hydrogen halide or an active hydrocarbyl halide such as t-butyl chloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.

Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins at temperatures above 140.degree. C. are provided by reacting a transition metal compound such as tetra(isopropoxy)titanium, an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an alkyl aluminum, e.g., di-n-butylmagnesium.x triethylaluminum and a hydrogen halide or an active hydrocarbyl halide such as t-butyl chloride. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.

Abstract: Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins are provided by reacting a dinitrogen and/or dihydrogen complex of a transition metal such as titanium with an organometallic compound of a divalent metal such as dihydrocarbyl magnesium or hydrocarbyl magnesium halide and a halide source such as alkyl aluminum halide. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics.