Process for preparing cycloolefin copolymers

US5602219A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Michael Aulbach · Hofheim, DE
• Michael-Joachim Brekner · Frankfurt am Main, DE
• Frank K uber · Oberursel, DE
• Frank Osan · Kelkheim, DE
• Thomas Weller · Mainz, DE
• J urgen Rohrmann · Liederbach, DE

Key dates

• Filing date: May 22, 1995
• Grant date: Feb 11, 1997
• Expiry date: May 22, 2015

Classification

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

Abstract

Transparent cycloolefin copolymers having a high tensile strength are obtained by polymerization of a polycyclic olefin, ethylene and, if desired, an acyclic olefin and/or a monocylcic olefin in the presence of a catalyst system which comprises a cocatalyst and an asymmetrical metallocene compound of the formula ##STR1## in which R.sup.16 is cyclopentadienyl and R.sup.17 is indenyl.