Electroconductive polymer solution and manufacture of electrocon

Details Electroconductive polymer solution and manufacture of electrocon Electroconductive polymer solution and manufacture of electrocon

1986-11-10

1988-08-09

Barr, Josephine

Compositions

Electrically conductive or emissive compositions

252518, 524 80, 524401, 524404, 524412, 524408, 524415, 524422, 524429, 524423, H01B 100, H01B 106

Patent

active

047626445

DESCRIPTION:

BRIEF SUMMARY
DESCRIPTION

1. Technical Field
The present invention relates to a solution of an electroconductive polymer. More particularly, the present invention relates to an electroconductive polymer solution comprising a specific oxidation polymer of an aniline derivative, a dopant, and an organic solvent, which is valuable as an electrolyte of a battery, an electrolyte of a capacitor, or the like. Furthermore, the present invention relates to an electroconductive article valuable as an electric or electronic part of an electromagnetic wave shielding member, a solar cell, a junction element or an electrochromic element, and to a process for preparing this electroconductive article from the above-mentioned polymer solution.
2. Background Art
It is known that an electroconductive polymer is obtained by doping a dopant into a polymeric substance, and detailed research has been especially made into electroconductive polyacetylene and poly-p-phenylene. It is known that p-type and n-type electroconductive polymers are formed by doping AsF.sub.5 or the like as the acceptor and sodium or the like as the donor into polyacetylene. Furthermore, it is known that electrical insulators, semiconductors, and electroconductive polymers having an electroconductivity comparable to those of metals can be obtained by selecting and using various dopants for polyphenylene sulfide, polythiophene, polypyrrole, and polyaniline, and it has been clarified that the electroconductivity in these polymers can be optionally controlled by varying the kinds and amounts of dopants.
It is therefore expected that these electroconductive polymers will be used for solar cells, electrodes, electrochromic elements, and the like.
Furthermore, since control by a computer has recently been conducted in automobiles, it is expected that these known electroconductive polymers will be widely used for shielding electromagnetic waves or other purposes, and it is also expected that they will be applied to various junction elements and other electronic instruments.
For some of these known electroconductive polymers, for example, polyacetylene, poly-p-phenylene, polythiophene, polypyrrole, and polyaniline, there are at present no solvents capable of dissolving both polymers per se and doped polymers. It is known that AsF.sub.3 can be used as the solvent capable of dissolving both poly-p-phenylene sulfide and a doping product thereof (Japanese unexamined patent publication No. 59-11324), but AsF.sub.3 has a high toxicity and the electroconductivity of the polymer solution is abruptly reduced in air. Accordingly, the product cannot be used as an electroconductive article.
As is apparent from the foregoing description, known electroconductive polymers, except certain electroconductive polymers, are generally insoluble and infusible, and therefore, the possibility of the production of an electroconductive article having an optional shape and thickness by dissolving or melting the known electroconductive polymer is limited and the use of the formed electroconductive article is naturally limited. This hinders development of the applications of electroconductive polymers, and the elimination of this defect is desired in various fields.
It is therefore a primary object of the present invention to overcome the above-mentioned defect and provide an electroconductive polymer solution which has a high electroconductivity, a good stability in air, and is very safe while in use. Another object of the present invention is to provide an electroconductive polymer article having an optional shape and thickness, a high electroconductivity, and an excellent stability in air.


DISCLOSURE OF THE INVENTION

In accordance with one aspect of the present invention, there is provided an electroconductive polymer solution comprising a polymer comprising at least 50 mole% of recurring units represented by the following general formula (1): ##STR2## wherein R.sub.1 through R.sub.4, which may be the same or different, represent a hydrogen atom or an alkyl or alkoxy group having 1 to 5 carbon atoms

REFERENCES:
patent: 4025463 (1977-05-01), Frevoy
patent: 4025691 (1977-05-01), Frevoy
patent: 4582587 (1986-04-01), Hotta et al.
patent: 4599194 (1986-07-01), Frommer et al.
patent: 4615829 (1986-10-01), Tamura et al.
patent: 4617143 (1986-10-01), Kessmehl et al.

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