Process for preparing a cycloolefin copolymer
US5869586A · kind A · utility
43Cited by
8References
11Claims
0Family size
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Inventors
Key dates
| Filing date | Dec 13, 1996 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Dec 13, 2016 |
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.