| abstract |
A solid catalyst component for the polymerization of olefins comprising a magnesium halide, a titanium compound having at least a Ti-halogen bond and at least two electron donor compounds one of which being selected from 1,3 diethers (DE) and the other being selected from dicarbamates (DC), said catalyst component being characterized by the fact that said electron donor compounds are present in a molar ratio DE:DC ranging from 4.5:1 to 20:1. |