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...

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Bibliographic Details
Main Authors DOLLE; VOLKER, WINTER; ANDREAS, SPALECK; WALTER
Format Patent
LanguageEnglish
Published 24.12.1996
Edition6
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary: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 metallocenes of the formula (I) which are stereorigid and whose moiety formed by Zr and the substituents R1-R4 has Cs symmetry or slightly distorted Cs symmetry.
Bibliography:Application Number: US19950473080