Process for preparing cycloolefin polymer

US5733991A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Jurgen Rohrmann · Kelkheim, DE
• Michael-Joachim Brekner · Frankfurt am Main, DE
• Frank Kuber · Oberursel, DE
• Frank Osan · Kelkheim, DE
• Thomas Weller · Mainz, DE

Key dates

• Filing date: Oct 15, 1996
• Grant date: Mar 31, 1998
• Expiry date: Oct 15, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/65912
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Cycloolefin polymers having a high viscosity number are obtained by polymerization of a polycyclic olefin and, if desired, an acyclic olefin and/or a monocyclic olefin in the presence of a catalyst system which comprises an aluminoxane and a metallocene compound of the formula ##STR1## in which R.sup.16 is fluorenyl or indenyl and R.sup.17 is cyclopentadienyl and the bridge R.sup.18 contains silicon.