Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-04-21
1996-06-18
Lusignan, Michael
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
427121, 427342, 4273898, 4273899, 428268, 4283084, B05D 302, B05D 512, B32B 700, B32B 514
Patent
active
RE0352780
ABSTRACT:
Production of electrically conductive composites comprising a dielectric porous substance, e.g., fiberglass fabric, and a pyrrole polymer in the pores of such substance, by treating the porous substance with a liquid pyrrole, and then treating the resulting porous substance with a solution of a strong oxidant in the presence of a non-nucleophilic anion, such as ferric chloride. The pyrrole monomer is oxidized to a pyrrole polymer, which precipitates in the interstices of the porous material. Alternatively, the dielectric porous material can first be treated with a solution of strong oxidant and non-nucleophilic anion followed by treatment with liquid pyrrole, to precipitate an electrically conductive polypyrrole in the pores of the material. The resulting composite of porous material, e.g., fiberglass fabric, containing polypyrrole is electrically conductive while the other properties of such impregnated conductive porous material are substantially unaffected. Several treatments of the porous substance with the pyrrole and oxidant solutions can be carried out to increase the electrical conductivity of the composite.
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K. C. Khulbe et al., "Polymerization of Pyrrole by Potassium Persulfate" Journal of Polymer Science: Polymer Chemistry Edition, vol. 20, 1089-1095 (1982).
Pietro Pratesi, pp. 7055-7058 of vol. 31, Chemical Abstracts.
Newman Paul R.
Warren, Jr. Leslie F.
Witucki Edward F.
Ginsberg Lawrence N.
Lusignan Michael
Rockwell International Corporation
Silberberg Charles T.
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