MAGNESIUM DICHLORIDE-ALCOHOL ADDUCTS AND CATALYST COMPONENTS OBTAINED THEREFROM

摘要

Spherical adducts comprising a MgCl2, an alcohol ROH in which R is a C1-C10 hydrocarbon group, present in a molar ratio with MgCl2 ranging from 0.5 to 5 and less than 5% wt, based on the total weight of the adduct, of a solid inorganic compound selected from oxides or hydroxides of Si, Al, Mg, Ti and mixtures thereof. The catalyst components obtained from the said adducts generate during polymerization a reduced content of broken polymer particles in comparison with the catalyst obtained from adducts not containing the inorganic solid compound.