Ziegler-Natta-type catalyst systems

US5081088A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Koelle · Ludwigshafen, DE
• Juergen Kerth · Eisenberg (Pfalz), DE

Key dates

• Filing date: Sep 20, 1990
• Grant date: Jan 14, 1992
• Expiry date: Sep 20, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Ziegler-Natta-type catalyst systems contain as active constituents PA0 a) atitanium-containing solid component which contains titanium, magnesium, halogen and a norbornadienedicarboxylate of the formula I ##STR1## as electron donor, where R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.8 -alkyl or 5- to 7-membered cycloalkyl which in turn can carry C.sub.1 -C.sub.10 -alkyl groups, PA0 b) an aluminum component and PA0 c) another electron donor component, and are particularly suitable for preparing polypropylene and copolymers of propylene with minor amounts of other .alpha.-olefins with 2 to 8 carbon atoms.