COMPONENTS AND CATALYSTS FOR THE POLYMERIZATION OF OLEFINS

摘要

Catalyst components for the polymerization of olefins are obtained by supporting on a magnesium dihalide in spherical form having particular porosity values; the product of the reaction of: a titanium compound containing at least one Tihalogen link and/or a Ti-OR link with the solid obtained from the decomposition to magnesium dihalide or to a product containing magnesium dihalide, of a complex having the formula: MgX ? nAlRIIX21 ? pAlX3 wherein X is chorine or bromine, X1 is chlorine, bromine or alkoxy group; RII is a hydrocarbon radical having 1-20 carbon atoms; n is an integer from 1 to 6; p is an integer from 0 to 1; (n+p) is an integer comprised between 1 and 6 inclusive.