Process for the preparation of polyolefins

US5700886A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Andreas Winter · Königstein, DE
• Walter Spaleck · Bocholt, DE
• Bernd Bachmann · Eppstein, DE

Key dates

• Filing date: May 31, 1995
• Grant date: Dec 23, 1997
• Expiry date: May 31, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/65927
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyolefins with a molecular weight distribution M.sub.w /M.sub.n .gtoreq.3.0, which may be monomodal, bimodal or multimodal, can be obtained by polymerization or copolymerization of olefins with a catalyst system consisting of an aluminoxane and a transition metal component (metallocene), in which the transition metal component consists of at least one zirconocene of the formula I and at least one zirconocene of the formula Ia ##STR1## or alternatively of at least 2 zirconocenes of the formula I.