Patent · US Expired

Process for preparing a cycloolefin copolymer

US6020444A · kind A · utility

27Cited by

7References

10Claims

0Family size

Assignees

Hoechst GmbH · DE
Mitsu Petrochemical Ind., Ltd. · JP

Inventors

Michael Riedel · Essen, DE
Thomas Weller · Mainz, DE
Alexandra Jacobs · Niedernhausen, DE

Key dates

Filing date	Jun 4, 1998
Grant date	Feb 1, 2000
Priority date	—
Expiry date	Jun 4, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/943
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing a cycloolefin copolymer by polymerization of at least one cyclic olefin and at least one acyclic olefin in the presence of a catalyst comprising at least one metallocene compound of the formula I, ##STR1## where L is a .pi.-ligand, L' is a .pi.-ligand, T is a bridge between L and L', M is a tetravalent transition metal, m is 1 or 2 and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.20 -hydrocarbon radical.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.