Transition metal compound, ligand system, catalyst system and the use of the latter for polymerisation and copolymerisation of olefins

US7342078B2 · kind B2 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Jorg Schottek · Frankfurt, DE
• Markus Oberhoff · Speyer, DE
• Carsten Bingel · Frankfurt am Main, DE
• David Fischer · Breunigweiler, DE
• Horst Weiβ · Schifferstadt, DE
• Andreas Winter · Königstein, DE
• Volker Fraaije · Frankfurt, DE
• Ralph-Dieter Maier · White Plains, US
• Wolfgang Bidell · Mutterstadt, DE
• Nicola Paczkowski · Loveland, US
• Jürgen Suhm · Ludwigshafen, DE
• Roland Kratzer · Kriftel, DE

Key dates

• Filing date: Dec 13, 2000
• Grant date: Mar 11, 2008
• Expiry date: Jun 15, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which bear different substituents in position 2 and position 4 on an indenyl ligand. Novel polypropylene copolymers can be obtained by this process.