Polymer coatings having improved resistance to solvents

A dispersion comprising:

• at least one electrically conductive polymer selected from the group consisting of polyalkylenedioxythiophenes containing recurring units of the general formula (I)
• wherein A represents an optionally substituted C1-C5-alkylene radical, R represents a linear or branched, optionally substituted C1-C18-alkyl radical, an optionally substituted C5-C12-cycloalkyl radical, an optionally substituted C6-C14-aryl radical, an optionally substituted C7-C18-aralkyl radical, an optionally substituted C1-C4-hydroxyalkyl radical or a hydroxyl radical, x represents an integer from 0 to 8 and in the case where several radicals R are bonded to A, these can be identical or different,
• at least one counter-ion selected from the group consisting of anions of polymeric carboxylic acids or sulfonic acids or monomeric C1-C20-alkanesulfonic acids, aliphatic C1-C20-perfluorosulfonic acids, aliphatic C1-C20-carboxylic acids, aliphatic C1-C20-perfluorocarboxylic acids, aromatic C1-C20-sulfonic acids optionally substituted by C1-C20-alkyl groups, optionally substituted C1-C20-cycloalkanesulfonic acids or tetrafluoroborates, hexafluorophosphates, perchlorates, hexafluoroantimonates, hexafluoroarsenates or hexachloroantimonates,
• at least one base, and
• at least one dispersing agent, characterized in that it comprises at least one condensate of melamine with at least one carbonyl compound,
• wherein the total amount of the at least one electrically conductive polymer and at least one counter-ion in the dispersion is between 0.05 and 10 wt. %, based on the total weight of the dispersion and wherein the total content of the at least one condensate of melamine and at least one carbonyl compound is 1 to 30 wt. % based on the weight of the dispersion.