Preparation of polypyrroles, and films obtained by this method
AssigneeBASF SE
InventorsHerbert Naarmann, Johann Nickl, Gernot Kohler
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Abstract
Polypyrroles are prepared by electrochemical polymerization, in particular anodic oxidation, of pyrrole alone or together with comonomers, in an aqueous electrolyte solvent which consists of not less than 50% by weight of water, in the presence of aromatic sulfonic acids and/or their salts as conductive salts. The process gives polypyrrole films which have good mechanical properties and high electrical conductivities.
Claims9
A process for the preparation of a polypyrrole film having a homogeneous surface and having an electrical conductivity above 10.sup.2 .OMEGA..sup.-1 cm.sup.-1 by anodic oxidation of pyrrole or a mixture of pyrrole with comonomers in a water-containing electrolyte solvent in the presence of a conductive salt, with deposition of the polypyrrole on the anode, wherein the electrochemical anodic oxidation is carried out in an aqueous electrolyte solvent which consists of not less than 50% by weight of water, aromatic sulfonic acids and/or their salts being used as conductive salts.
Dependencies are inferred from the claim text.