Process for the preparation of 1-olefin polymers

US5416178A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Andreas Winter · Königstein, DE
• Walter Spaleck · Bocholt, DE

Key dates

• Filing date: Aug 22, 1991
• Grant date: May 16, 1995
• Expiry date: Aug 22, 2011

Classification

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

Abstract

In the case of Ziegler catalysts based on a metallocene as the transition metal component and an aluminoxane as the activator, preactivation of the metallocene with the aluminoxane results in a considerable increase in the activity of the catalyst system. Furthermore, 1-olefin polymers of a high degree of isotacticity and having compact, spherical particles, a very narrow particle size distribution and a high bulk density are obtained by means of a catalyst system of this type.