Method of forming electrically conductive polymer blends
AssigneeW. R. Grace & Co.
InventorsWilliam P. Roberts, Leslie A. Schulz
Life of this patent
Estimating the term…
Abstract
This invention relates to a chemical method of forming an electrically conductive polymer blend which comprises impregnating a non-porous, swellable or soluble host polymer with: (a) one or more cyclic compounds selected from the group consisting of pyrrole, aniline and substituted analogues of said group members, and (b) at least one chemical oxidant selected from the group consisting of trivalent compounds, tetravalent cerium compounds, hexavalent molybdenum, tungsten or chromium compounds, divalent copper compounds, monovalent silver compounds, nitrites, quinones, peroxides and peracids, said oxidant being dissolved in a solvent capable of swelling or solubilizing said host polymer.
Claims7
A method of imparting electrical conductivity to the surface layer, up to 1 mm deep, of non-porous polymers by impregnation with a conductive polymer, said method comprising:
- (a) either diffusing a cyclic monomer selected from the group consisting of pyrrole, aniline and substituted analogs thereof into said non-porous polymer or codissolving said cyclic monomer and said non-porous polymer in a solvent therefor followed by evaporation of said solvent, and
- (b) then exposing the impregnated polymer to a solution containing at least one chemical oxidant selected from the group consisting of trivalent iron compounds, tetravalent cerium compounds, hexavalent molybdenum, tungsten or chromium compounds, divalent copper compounds, monovalent silver compounds, nitrites, quinones, peroxides and peracids, said oxidant(s) being capable of reacting with the cyclic monomer to convert it to an electrically conductive polymeric oxidation product within the surface layer of the impregnated polymer.
Dependencies are inferred from the claim text.