Appeal No. 1998-0870
Application No. 08/325,015
Wessling shows that finely divided (preferably having an
average particle size less than or equal to 1 micron),
intrinsically conductive polymers with a conjugated B-electron
system that can be rendered electrically conductive by
complexation, such as polypyrrole, and finely divided
(preferably having an average particle size less than or equal
to 1 micron) carbon black having a specific surface area of
greater than 80 m /g are interchangeable as part of a system2
of finely divided electrically conductive materials in polymer
matrix compositions including enamels (column 2, lines 8-30
and 53-64; column 4, lines 12-18).
De Boer discloses that an aqueous electroconductive
polypyrrole latex, although used in combination with an
aqueous solution of hydrolyzed alkoxysilane, provides an
antistatic coating for display screens (column 1, lines 1-4
and 30-47). Further, De Boer teaches that polypyrrole is
black and that polyvinyl alcohol is a steric stabilizer (i.e.,
a dispersant or surfactant) for polypyrrole (column 3, lines
23-38).
Armes teaches an electrically conductive polypyrrole-
containing composition that has good film-forming
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