Process for producing ethylene copolymers under high pressure

US5969062A · kind A · utility

Assignee

• BASF SE

Inventors

• Ulrich Moll · Schnaittach, DE
• Eckard Schauss · Heuchelheim, DE
• Roger Klimesch · Ransbach-Baumbach, DE

Key dates

• Filing date: Apr 7, 1998
• Grant date: Oct 19, 1999
• Expiry date: Apr 7, 2018

Classification

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

Abstract

In a process for preparing copolymers of ethylene with C.sub.3 -C.sub.10 -alk-1-enes, the polymerization is carried out at pressures in the range from 1000 to 3500 bar and at from 200 to 280.degree. C. in the presence of a catalyst system comprising as active constituents a donor-substituted monocyclopentadienylamido(transition metal) complex compound of the following formula, a compound capable of forming metallocenium ions and, optionally, a trialkylaluminum compound; ##STR1## wherein y is ##STR2##