Method for producing cycloolefin (co)polymers for technical applications

US6156857A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karl-Heinz Aleksander Ostoja Starzewski · Bad Vilbel, DE
• Warren Mark Kelly · Airdrie, CA
• Andreas Stumpf · Leverkusen, DE

Key dates

• Filing date: Dec 30, 1998
• Grant date: Dec 5, 2000
• Expiry date: Dec 30, 2018

Classification

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

Abstract

Cycloolefin copolymers for industrial applications, with the exception of the use for optical data memories, can be prepared by copolymerization of monomers from the group consisting of cyclic olefins, .alpha.-olefins having 2 or more C atoms and optionally conjugated or non-conjugated diolefins, the catalysts employed being metallocene compounds or .pi. complex compounds of the formula ##STR1## in which CpI and CpII represent carbanions having a cyclopenadienyl-containing structure, PA1 .pi.I and .pi.II represent charged or electrically neutral .pi. systems, PA1 D represents a donor atom and PA1 A represents an acceptor atom, where D and A are linked by a reversible coordinate bond such that the donor group assumes a positive (part) charge and the acceptor group assumes a negative (part) charge, PA1 M represents a transition metal of sub-group III, IV, V or VI of the Periodic Table of the elements (Mendeleev), including the lanthanides and the actinides, PA1 X denotes one anion equivalent and PA1 n denotes the number zero, one, two, three or four, depending on the charge of M.