Process for producing cyclic olefin based polymers, cyclic olefin copolymers, compositions and molded articles comprising the copolymers
US5629398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1992 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | Jun 5, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for effectively producing a cyclic olefin polymer and a cyclic olefin/alpha-olefin copolymer without opening the cyclic olefin, is disclosed. Further, a novel cyclic olefin/alpha-olefin copolymer prepared by the above-mentioned process, compositions and molded articles comprising the novel copolymer, are also disclosed. In the process for producing a cylcic olefin based polymer according to the present invention, homopolymerization of a cyclic olefin or copolymerization of a cyclic olefin and an alpha-olefin is effected in the presence of a catalyst comprising, as main ingredients, the following Compounds (A) and (B), and optionally Compound (C): PA1 (A) a transition metal compound; PA1 (B) a compound capable of forming an ionic complex when reacted with a transition metal compound; and PA1 (C) an organoaluminum compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.