PROCESS FOR THE PREPARATION OF POLYOLEFINS

摘要

Process for the preparation of polyolefins having a wide molecular weight distribution Polyolefins with a molecular weight distribution Mw/Mn ? 3.0, which may be monomodal, bimodal or multimodal, can be obtained by polymerization or copolymerization of olefins with a catalyst system consisting of an aluminoxane and a transition metal component (metallocene), in which the transition metal component consists of at least one zirconocene of the formula I and at least one zirconocene of the formula Ia <IMG> (I) <IMG> (Ia) or alternatively of at least 2 zirconocenes of the formula I.