Catalysts for homo- and copolymerization of ethylene and the polymers obtained by use thereof

Abstract From the Canadian patent

Disclosed are catalysts for the polymerization of ethylene and of mixtures thereof with olefins comprising the, product obtained by reacting the following components: (a) an Al-alkyl compound;, (b) an electron-donor compound containing at least a nitrogen atom, said compound being reactive towards MgCl2, but not towards Al-triethyl; and (c) the reaction product between a titanium compound containing at least a titanium-halogen bond and : an anhydrous magnesium halide. The obtained (co)polymers have a very narrow molecular weight distribution which renders them particularly suitable for some applications, such as injection molding.