Patent ID: 6388028
Filing Date: 2002-05-14
Classification: C08F

Abstract:
Spherical catalyst components for the polymerization of olefins CH2&boxH;CHR, wherein R is hydrogen or hydrocarbon radical having 1-12 carbon atoms, comprising a titanium compound, supported on an active magnesium halide possessing an x-ray spectrum in which the most intense diffraction line that appears in a spectrum of a non-active magnesium halide is diminished in intensity and substituted by a halo of which the maximum intensity is shifted towards angles lower than those of the most intense line, and the spherical catalyst components contain more than one Ti-halogen bond and optionally contains groups different from halogen in amounts lower than 0.5 mole for each mole of Ti, said components having a surface area, determined by the BET method, of lower than 70 m2/g, a total porosity, measured by the mercury method, between 0.6 and 1.2 cm3/g and a pore radius distribution such that at least 50% have values higher than 800 Ã¥.