Method for the production of conductive polymers
AssigneeHeraeus Precious Metals GmbH & Co. KG
InventorsFriedrich Jonas, Udo Guntermann
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Abstract
The present invention relates to a novel process for preparing an aqueous or nonaqueous dispersion or solution comprising at least one conductive polymer and at least one polyanion, characterized in that the polymerization is performed with ultrasound irradiation, to aqueous or nonaqueous dispersions prepared by this process and to the use thereof.
Claims12
A process for preparing an aqueous or nonaqueous dispersion or solution comprising at least one cationic polythiophene and at least one polyanion, in the form of a polythiophene/polyanion-complex, wherein cationic polythiophene is prepared in the presence of the polyanion and wherein the preparation is effected with ultrasound irradiation and wherein the thus obtained dispersion or solution has a viscosity at 20° C. between 1 and 100 mPas, measured with a rheometer at a shear rate of 100/sec, at a solids content of the polythiophene of 1.0 to 1.5% by weight.
A process for preparing an aqueous or nonaqueous dispersion or solution comprising at least one cationic polythiophene and at least one polyanion, in the form of a polythiophene/polyanion-complex, wherein cationic polythiophene is prepared in the presence of the polyanion and wherein the preparation is effected wherein the process comprises the following steps:
- 1) adding at least one oxidizing agent only after the reaction medium has been inertized with the aid of inert gas,
- 2) performing the polymerization with ultrasound irradiation and
- wherein the thus obtained dispersion or solution has a viscosity at 20° C. between 1 and 100 mPas, measured with a rheometer at a shear rate of 100/sec, at a solids content of the polythiophene of 1.0 to 1.5% by weight.
A process for preparing an aqueous or nonaqueous dispersion or solution comprising at least one conductive polymer and at least one polyanion, wherein the process comprises the following steps:
- performing the polymerization at a pressure below atmospheric pressure and with ultrasound irradiation.
Dependencies are inferred from the claim text.