Metallocene catalysts comprising indenyl ligands substituted with electronegative groups

US6087292A · kind A · utility

Assignee

• Tangor GmbH · DE

Inventors

• Andreas Winter · Königstein, DE
• Juergen Rohrmann · Kelkheim, DE
• Martin Antberg · Frankfurt am Main, DE
• Walter Spaleck · Bocholt, DE
• Wolfgang Anton Herrmann · Freising, DE
• Herbert Riepl · Dachau, DE

Key dates

• Filing date: Mar 24, 1998
• Grant date: Jul 11, 2000
• Expiry date: Mar 24, 2018

Classification

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

Abstract

A highly effective catalyst system for the polymerization of olefins comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## where M.sup.1 =Zr or Hf, R.sup.1 and R.sup.2 =(C.sub.1 -C.sub.3)-alkyl or chlorine, R.sup.3, with the proviso that at least one of the radicals R.sup.3 is not hydrogen, is hydrogen, F, Cl, --OR.sup.7, --NR.sup.7 R.sup.8, --P(O)R.sup.7 R.sup.8, --P(OR.sup.7).sub.2 or SR.sup.7, R.sup.4 is a ##STR2## radical, and m plus n are zero or 1.