Catalyst systems of the Ziegler-Natta type

US6200922A · kind A · utility

Assignee

• BASF SE

Inventors

• Stephan Huffer · Birkenfeld, DE
• Wolfgang Bidell · Mutterstadt, DE
• Patrik Müller · Gothenburg, SE
• Ulrich Moll · Schnaittach, DE
• Roland Hingmann · Ladenburg, DE
• Gunther Schweier · Osthofen, DE

Key dates

• Filing date: Jun 5, 1997
• Grant date: Mar 13, 2001
• Expiry date: Jun 5, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2410/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The catalyst systems comprise as active constituents PA1 a) a titanium-containing solid component comprising a compound of titanium, a compound of magnesium, a halogen, an inorganic oxide as support and a carboxylic ester as electron donor compound, and also, as cocatalyst, PA1 b) an aluminum compound and PA1 c) optionally a further electron donor compound, wherein the inorganic oxide used has a pH of from 1 to 6, an average particle diameter of from 5 to 200 .mu.m, an average primary particle diameter of from 1 to 20 .mu.M and voids or channels having an average diameter of from 0.1 to 20 .mu.m and a macroscopic share of the volume of the overall particle within the range from 5 to 30%.