Electrically conductive alternating copolymer and method of preparing such a copolymer
US5380807A · kind A · utility
5Cited by
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28Claims
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Key dates
| Filing date | Jan 8, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Jan 8, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B1/128
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Polycondensation of, for example, squaric acid with a benzodihydropyrrole, benzodithiazole, neocuproine, terthienyl or an aromatic diamine gives a semiconductive alternating copolymer having a small band gap. It is alternatively possible to use croconic acid or 5,6-dihydroxy-5-cyclohexene-1,2,3,4-tetraone instead of squaric acid. An alternating copolymer of croconic acid and a methyl-substituted benzodithiazole has the following repetititve unit: ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.