Aqueous dispersions and paints containing conductive polymers for pattern electrode formation.

By concentrating aqueous dispersions of conductive polymer composites and binder resins within a specific range, the issues of gelation, property changes, and low fracture resistance in high-viscosity coatings are addressed, resulting in stable, conductive coatings suitable for patterned electrodes.

JP2026109476APending Publication Date: 2026-07-01松下 晴彦
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Patent Information

Application Number
JP2024233311
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2026-07-01

AI Technical Summary

Technical Problem

Conventional methods for forming patterned electrodes using conductive paints face issues such as short storage life due to gelation, changes in physical properties with film formation temperature, and low fracture resistance, particularly when using high-viscosity coatings containing conductive polymer composites.

Method used

Aqueous dispersions of conductive polymer composites and water-dispersible binder resins are mixed and concentrated by water removal, maintaining a specific composition range to achieve high viscosity without thickeners, enhancing printability and film properties.

Benefits of technology

The resulting conductive coatings exhibit improved stability, conductivity, and fracture resistance, comparable to ITO electrodes, with extended storage life and reduced sensitivity to film formation temperature variations.

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Abstract

This invention provides a high-viscosity conductive coating suitable for forming patterned electrode coatings by printing, without using a thickening agent, for aqueous dispersions and conductive coatings containing a conductive polymer composite, and demonstrates that this conductive coating improves the storage life of the coating and the resistance of the conductive coating to fracture. [Solution] A conductive paint and an aqueous dispersion are prepared such that, for every 1 volume of conductive polymer composite consisting of a conductive polymer and a dopant, there are 10 to 30 volumes of water-dispersible binder resin and 60 to 80 volumes of water as the solvent. By mixing the aqueous dispersion of the conductive polymer composite and the aqueous dispersion of the water-dispersible binder resin and then removing the water to increase the concentration, a conductive paint consisting of a high-viscosity aqueous dispersion suitable for pattern printing is obtained.
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Citation Information

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