Process for the preparation of an olefin polymer using metallocenes containing specifically substituted indenyl ligands

US5455365A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Andreas Winter · Königstein, DE
• Frank Kueber · Oberursel, DE
• Walter Spaleck · Bocholt, DE
• Herbert Riepl · Dachau, DE
• Wolfgang Anton Herrmann · Freising, DE
• Volker Dolle · Kelkheim, DE
• Juergen Rohrmann · Kelkheim, DE

Key dates

• Filing date: Aug 3, 1993
• Grant date: Oct 3, 1995
• Expiry date: Aug 3, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/63927
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for the preparation of an olefin polymer using metallocenes containing specifically substituted indenyl ligands A highly effective catalyst system for the polymerization of olefins comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.5 is hydrogen or alkyl, R.sup.3 and R.sup.4 are alkyl, where R.sup.3, R.sup.4 and R.sup.5 may be halogenated, --(CR.sup.7 R.sup.8).sub.m --R.sup.6 --(CR.sup.7 R.sup.8).sub.n -- is a single- or multi-membered chain in which R.sup.6 may also be a (substituted) heteroatom, and m+n is zero or 1.