Catalyst and process for preparing high molecular weight polyolefines.

摘要

High-molecular-weight polyolefins, in particular those of propylene, which have high tacticity are obtained by polymerisation or copolymerisation of alpha -olefins using a catalyst system comprising an aluminoxane and a supported catalyst component, the latter being prepared from an inorganic support material, preferably SiO2, and a metallocene.