Process for the preparation of syndiotactic polyolefins...

Details Process for the preparation of syndiotactic polyolefins... Process for the preparation of syndiotactic polyolefins...

C - Chemistry, Metallurgy

08

F

C08F 2/04 (2006.01) C08F 2/18 (2006.01) C08F 2/34 (2006.01) C08F 4/642 (2006.01) C08F 10/00 (2006.01) C08F 10/06 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01) C08F 110/06 (2006.01) C08F 210/06 (2006.01)

Patent

CA 2069603

HOE 91/F 159 ABSTRACT OF THE DISCLOSURE Process for the preparation of syndiotactic polyolefins having a broad molecular weight distribution Syndiotactic 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 2 metal- locenes of the formula Image (I) which are stereorigid and whose moiety formed by Zr and the substituents R1-R4 has Cs symmetry or slightly dis- torted Cs symmetry.

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