Solid catalytic component and catalytic system of the Ziegler-Natta type, process for their preparation and their use in the polymerisation of alk-1-enes

摘要

The present invention relates to a new solid catalytic component which can be used in combination with an aluminium compound as co-catalyst and optionally an external electron donor as additional co-catalyst to form a catalytic system of the Ziegler-Natta-catalyst-type. The solid catalytic system comprises a titanium or vanadium compound, a compound of magnesium containing at least one halogen, a particulate porous support, and optionally an internal electron donor.