Catalysts for the copolymerization of ethylene and its mixtures with CH2 = CHR-VIII olefins and the process for the polymerization of ethylene and its mixtures with CH2 = CH-VIII olefins

摘要

The present invention relates to catalysts for the polymerization of ethylene and its mixtures with olefins CH2=CHRVIII, comprising the reaction product of a solid catalyst component containing Ti, Mg and halogen, an alkyl-Al compound and a particular electron donor compound selected from the compounds containing at least two oxygen atoms bonded to different carbon atoms and selected by standard tests of reactivity with triethyl-Al and MgCl2 compounds. The catalyst of the invention are used in processes for the (co)polymerization of ethylene to prepare (co)polymers having narrow molecular weight distribution (MWD).