Process for producing cycloolefin random copolymer
USRE36406E · kind E · reissue
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Key dates
| Filing date | Dec 9, 1993 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Dec 9, 2013 |
Classification
- Technology area (CPC —)General
Abstract
A process for producing a cycloolefin random copolymer, which comprises PA1 (1) copolymerizing (a) ethylene or both ethylene and an alpha-olefin having at least 3 carbon atoms with (b) a cycloolefin such as octahydronaphthalenes and bicyclo[2,2,1]hept-2-ene in the presence of (c) a catalyst formed from a soluble vanadium compound and an organoaluminum compound at least one of which has halogen, in (d) a liquid phase composed of a hydrocarbon medium to form a solution of a cycloolefin random copolymer, and PA1 (2) contacting the resulting copolymer solution with (e) an adsorbent containing a metal cation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.