Patent ID: 8721929

Claim:
A complex comprising an optionally substituted polythiophene and a polyanion, wherein the polyanion comprises a copolymer with repeat units of the formulae (I) and (III), or repeat units of the formulae (II) and (III), or repeat units of the formulae (I), (II) and (III) where R 1 , R 2 , R 3 , R 4 , R 5 are each independently H, an optionally substituted C 1 -C 18 -alkyl radical, an optionally substituted C 1 -C 18 -alkoxy radical, an optionally substituted C 5 -C 12 -cycloalkyl radical, an optionally substituted C 6 -C 14 -aryl radical, an optionally substituted C 7 -C 18 -aralkyl radical, an optionally substituted C 1 -C 4 -hydroxyalkyl radical or a hydroxyl radical, R 6 is C 1 -C 30 -alkyl radical, D is a direct covalent bond or an optionally substituted C 1 -C 5 -alkylene radical, R is a linear or branched, optionally substituted C 1 -C 18 alkyl radical, an optionally substituted C 5 -C 12 -cycloalkyl radical, an optionally substituted C 6 -C 14 -aryl radical, an optionally substituted C 7 -C 18 -aralkyl radical, an optionally substituted C 1 -C 4 -hydroxyalkyl radical or a hydroxyl radical, x is an integer from 0 to 4, M is H or Li + , Na + , K + , Rb + , Cs + , NH 4 + , Na + , K + or another cation, and the preparation of the repeat units (I) and (II) are between 0 and 50% by mass and the preparation of repeat unit (III) is between 20 and 100% by mass and where the proportion of repeat units (I) and (II) must not both be 0% by mass.