PROCESS FOR THE PREPARATION OF POLYOLEFINS HAVING A BROAD MOLECULAR WEIGHT DISTRIBUTION

摘要

HOE 91/5 158 Process for the preparation of polyolefins having a broad molecular weight distribution Polyolefins having a molecular weight distribution Mw/Mn of ? 3 and which may be monomodal, bimodal or multimodal are obtained by polymerization or copolymerization of olefins of the formula RCH=CHR, in which a catalyst system comprising an aluminoxane and a transition-metal component (metallocene) is used, the transition-metal component comprising at least one zirconocene of the formula I (I), (Ia) and at least one zirconocene of the formula Ia or alternatively at least 2 zirconocenes of the formula I.