Preparation of propylene-ethylene copolymers

US5344885A · kind A · utility

Assignee

• BASF SE

Inventors

• Meinolf Kersting · Neustadt, DE
• Juergen Kerth · Eisenberg (Pfalz), DE
• Klaus-Dieter Hungenberg · Birkenau, DE
• Patrik Mueller · Kaiserslautern, DE
• Peter Koelle · Ludwigshafen, DE

Key dates

• Filing date: Feb 25, 1993
• Grant date: Sep 6, 1994
• Expiry date: Feb 25, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F210/16
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Propylene-ethylene copolymers are obtained by two-stage polymerization from the gaseous phase in an agitated fixed bed by means of a Ziegler-Natta catalyst system that contains in addition to a titanium-containing solid component also an aluminum compound as co-catalyst, wherein as Ziegler-Natta catalyst system a system is used which, following the reaction of the titanium-containing solid component with the co-catalyst, is deactivated by reaction with carbon dioxide. The copolymers are used for producing fibers, films and moldings.