Patent ID: 6544920
Filing Date: 2003-04-08
Classification: C08F

Abstract:
Solid catalyst component for the polymerization of olefins, comprising the product of the direct reaction, with no subsequent reactions with reducing organometallic compounds, between a titanium compound containing at least one Ti-halogen bond, optionally an electron-donor compound, and a support obtained by contacting a metal oxide containing hydroxyl groups with a solution comprising:A) magnesium chloride; B) an alcohol in quantities ranging from 1 to 6 moles per mole of magnesium chloride, in an organic solvent C) which is a halogenated hydrocarbon, the organic solvent being capable of bringing the magnesium chloride in solution in quantities greater than or equal to 5 g per liter in the presence of the above mentioned quantities of alcohol B), said solvent not being able to form adducts with the magnesium chloride, wherein said organic solvent (C) is selected from the group consisting of dichloromethane, trichloromethane, carbon tetrachloride, dichlorobromomethane, isopropylchloride, N-butylchloride, 1,2-dichloroethane, trichloroethene, trichloroethane, chlorocyclohexane, dichlorocyclohexane, chlorobenzene, bromobenzene, dichlorobenzene, benzylchloride, chlorobenzylchloride, benzyltrichloride, 1,2,3-trichloropropane, 3-chloropropene, and chlorotoluene.