Monocyclopentadienyl complexes of chromium, molybdenum or tungsten with a donor bridge

US6919412B1 · kind B1 · utility

Assignee

• Basell Polyolefine GmbH · DE

Inventors

• Shahram Mihan · Bad Soden, DE
• Dieter Lilge · Schifferstadt, DE
• Paulus De Lange · Wesseling, DE
• Gunther Schweier · Osthofen, DE
• Martin Schneider · Remchingen, DE
• Ursula Rief · Heddesheim, DE
• Udo Handrich · Haßloch, DE
• Johannes Hack · Bad Kötzting, DE
• Markus Enders · Heidelberg, DE
• Gunter Ludwig · Steinsfurt, DE
• Ralph Rudolph · Kranzegg, DE

Key dates

• Filing date: Aug 1, 2000
• Grant date: Jul 19, 2005
• Expiry date: Aug 1, 2020

Classification

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

Abstract

Substituted monocyclopentadienyl, monoindenyl, monofluorenyl or heterocyclopentadienyl complexes of chromium, molybdenum or tungsten, wherein at least one of the substituents of the cyclopentadienyl ring carries a rigid donor function which is not exclusively bonded through sp3-hybridized carbon or silicon atoms, and a process for polymerizing olefins.