Process for the preparation of polyolefins

US5696045A · kind A · utility

Inventors

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

Key dates

• Filing date: Jun 24, 1996
• Grant date: Dec 9, 1997
• Expiry date: Jun 24, 2016

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.