Curable conductive compositions

A composition comprising

• i) at least one polythiophene which is characterized by its compatibility in PGME (1-methoxypropan-2-ol), demonstrated by an RF-value of at least 0.8;
• iii) at least one ethylenically unsaturated compound, preferably at least one ethylenically unsaturated compound that is polymerizable in a radical chain reaction;
• iv) at least one organic solvent;
• v) at least one radical initiator.

A layer structure, comprising

• a) a substrate;
• b) a conductive layer coated onto the substrate, wherein the conductive layer comprises
• at least one polythiophene comprising monomer units of structure (I)
• in which
• * indicates the bond to the neighboring monomer units,
• X, Y represent O or S,
• R1-R4 independently from each other represent a hydrogen atom or an organic residue R, with the proviso that at least one of residues R1 to R4 represents an organic residue R;
• at least one organic compound ii) carrying at least one acid group, preferably one or two sulfonic acid group(s), one or two sulfuric acid group(s), one or two phosphonic acid group(s) or one or two phosphoric acid group(s), or a salt of said organic compound, wherein the molecular weight of the organic compound or the salt thereof is less than 1,000 g/mol;
• a polymer matrix based on a polymerized ethylenically un-saturated compound iii) into which the at least one polythio-phene is embedded;
• wherein the conductive polymer layer has a pencil hardness of at least 1H.

A layer structure, comprising

• a) a substrate;
• b) a conductive layer coated onto the substrate, wherein the conductive layer comprises
• at least one polythiophene which is characterized by its compatibility in PGME (1-methoxypropan-2-ol), demonstrated by an RF-value of at least 0.8;
• a polymer matrix based on a polymerized ethylenically un-saturated compound iii) into which the at least one polythio-phene is embedded;
• wherein the conductive polymer layer has a pencil hardness of at least 1H.