Patent ID: 6300273
Filing Date: 2001-10-09
Classification: C08F

Abstract:
Catalysts for the polymerization of ethylene and mixtures of ethylene with olefins having the formula CH.sub.2.dbd.CHR.sup.VIII, where R.sup.VIII is an alkyl, cycloalkyl, or aryl radical having 1-12 carbon atoms, comprising the reaction product of:(a) a solid catalyst component consisting essentially of a magnesium halide in the active form and titanium compound containing at least one Ti-halogen bond;(b) an Al-alkyl compound; and(c) an electron donor compound;in which the electron donor compound (c) is selected from compounds containing at least two oxygen atoms bonded to different carbon atoms, the electron donor compound (c) being reactive towards MgCl.sub.2 but not towards AlEt.sub.3 under the standard conditions.