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Conductive polyurethane foam and its manufacture

  • US 5,591,482 A
  • Filed: 02/17/1994
  • Issued: 01/07/1997
  • Est. Priority Date: 02/17/1993
  • Status: Expired due to Fees
First Claim
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1. A method of manufacturing a conductive polyurethane foam comprising the steps of:

  • coating an oxidizer solution on surfaces of cells of a polyurethane foam having a plurality of open cells which are connected to each other;

    perfectly removing a solvent of said oxidizer solution by vacuum drying;

    polymerizing a compound with conjugated double bonds on the surfaces of the cells of said polyurethane foam, after said cells have been coated with said oxidizer in a vapor-phase atmosphere to form a conductive conjugated polymer layer of said compound on the oxidizer-coated surfaces of said cells; and

    dipping said polyurethane foam formed with said polymer layer in an organic solvent which does not dissolve said polyurethane foam to extract any unpolymerized portion of said compound and said oxidizer, followed by vacuum drying.

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