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Method for making electrically conductive textile materials

  • US 4,877,646 A
  • Filed: 06/27/1988
  • Issued: 10/31/1989
  • Est. Priority Date: 06/27/1988
  • Status: Expired due to Term
First Claim
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1. A method for imparting electrical conductivity to a textile material, which comprises:

  • (a) contacting the textile material with an aqueous solution of an oxidatively polymerizable pyrrole compound and an oxidizing agent capable of oxidizing said compound to a polymer, said contacting being carried out in the presence of a counter ion or doping agent which imparts electrical conductivity to said polymer when fully formed, said contacting being under conditions at which the pyrrole compound and the oxidizing agent react with each other to form a prepolymer in said aqueous solution;

    (b) depositing onto the surface of the textile material the prepolymer of the polymerizable compound; and

    (c) allowing the prepolymer to polymerize while deposited on the textile material so as to uniformly and coherently cover the textile material with a conductive film of polymerized compound;

    the improvement wherein in step (a) a ferric salt is used as the oxidizing agent and a weak complexing agent for ferric ions is included in the aqueous solution, in an amount sufficient to effectively control the polymerization rate of steps (b) and (c) such that the prepolymer is uniformly and coherently adsorbed onto the surface of the textile material while effectively avoiding undesired formation of polymer in solution.

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