| abstract |
A solution process, and a catalyst therefor, for the preparation of high molecular weight polymers of alpha-olefins viz. homopolymers of ethylene and copolymers of ethylene and C 3 -C 12 alpha-olefins, is disclosed. The process is operated under solution polymerization conditions at 105-320°. The catalyst is obtained from titanium tetrahalides, vanadium oxytrihalides and organoaluminium compounds, in which the admixture of catalyst components is heat-treated at 150-320°C, and activated with an aluminoxane. The catalyst has good activity and the polymer obtained has improved colour. |