| abstract |
A catalytic system with an increased activity for the (co)polymerization of alpha-olefins comprises a catalyst of the metallocene type, which is capable of polymerizing olefins without aluminoxane, and a weak co-ordinating polar compound. n The polymerization process based on this catalytic system enables a higher productivity to be obtained with respect to an analogous process carried out with the metallocene-type catalyst as such. |