Process for the synthesis of sublimable oligomers based on phenylene, linear and of controlled length
US5266172A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1991 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Jun 25, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G61/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of sublimable oligomers based on phenylene, linear and of controlled length, by electrochemical coupling of two lower oligomers within a monocompartmental cell with three electrodes, in the presence of an organometallic catalyst, characterized in that it comprises: PA0 1--electrolysis of the catalyst and its reaction with one of the two oligomers at a first potential, PA0 2--reduction of the insertion species obtained according to step 1, and its reaction with a second oligomer at a second potential below the first potential, and PA0 3--recovery of the sublimable oligomer so obtained, the two lower oligomers used being mono- or dihalogenated oligomers identical or different. The present invention also relates to sublimable oligomers based on phenylene obtained by this process, and their uses in electronics and/or optics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.