Patent ID: 7411779

Claim:
A process for the production of an electrolytic capacitor which comprises applying a dispersion a) to a capacitor body wherein said capacitor body comprises a porous electrode body of an electrode material, a dielectric covering the surface of this electrode material, a solid electrolyte at least comprising a conductive material, that wholly or partially covers the dielectric surface, and said dispersion a) comprises at least particles b) of an electrically conductive polymer containing at least one optionally substituted polyaniline and/or one polythiophene with recurring units of general formula (I) or formula (II) or recurring units of general formulae (I) and (II) wherein A represents an optionally substituted C 1 to C 5 alkylene radical, R represents a linear or branched, optionally substituted C 1 to C 18 alkyl radical, an optionally substituted C 5 to C 12 cycloalkyl radical, an optionally substituted C 6 to C 14 aryl radical, an optionally substituted C 7 to C 18 aralkyl radical, an optionally substituted C 1 to C 4 hydroxyalkyl radical or a hydroxyl radical, x represents an integer from 0 to 8 and if a plurality of radicals R are bound to A, these may be the same or different, and containing a binder c) and a dispersing agent d), and, for forming an electrically conductive polymeric outer layer, the dispersing agent d) is optionally at least partially removed and/or the binder c) is cured, wherein the proportion of the particles b) of the conductive polymer in the dispersion a) having a diameter of less than 700 nm forms a solids content of at least 5% by weight of the solids content of the dispersion, and in that, in addition to the components b) to d), solid particles e) having a diameter in the range from 0.7 to 20 μm are also contained in the dispersion.