POLYOLEFIN MOLDING COMPOSITION HAVING A BROAD MELTING RANGE, PROCESS FOR ITS PREPARATION, AND ITS USE

摘要

of the disclosure Polyolefin molding composition having a broad melting range, process for its preparation, and its use Polyolefin molding compositions which have a broad, bimodal or multimodal melting range in the DSC spectrum, where the melting range maximum is between 120 and 165.degree.C, are obtained by polymerization or copolymerization of at least two olefins to give polyolefins of different melting point. The olefins have the formula RaCH=CHRb, and the catalyst system comprises an aluminoxane and at least two transition-metal components of the formula I <IMG> (I) in which M1 is Zr, Hf or Ti.