Chemical synthesis of conducting polypyrrole
US4697001A · kind A · utility
33Cited by
3References
21Claims
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Key dates
| Filing date | Oct 9, 1986 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Oct 9, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2459
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Production of electrically conductive polypyrrole of enhanced stability by treating a liquid pyrrole with a solution of a strong oxidant, capable of oxidizing pyrrole to a pyrrole polymer, and oxidizing the pyrrole by such strong oxidant in the presence of a relatively large organic dopant anion, and precipitating a conductive polypyrrole. The strong oxidant, e.g., Fe.sup.3+ ion, and dopant anion, which can be an alkyl or aryl sulfonate, e.g., methylbenzenesulfonate, or a perfluorinated carboxylate, e.g., trifluoroacetate, anion, can be derived from a single compound, e.g., ##STR1## the anion serving as dopant for the polypyrrole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.