| abstract |
A solid catalyst component for the polymerization of olefins, comprising: an inert porous support, Mg, Ti, halogen and an electron donor selected from succinates of formula (I) wherein the radicals R<1> and R<2, >equal to or different form each other, are hydrocarbon groups, the radicals R<3>, R<4>, R<5 >and R<6>, equal to or different from each other, are hydrogen or hydrocarbon groups. |