Transition metal compound, ligand system, catalyst system and its use for the polymerization and copolymerization of olefins

US7569651B2 · kind B2 · utility

Assignee

• Basell Polypropylen 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: May 18, 2005
• Grant date: Aug 4, 2009
• Expiry date: Mar 13, 2026

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.