Electrodepositionable paint composition containing calcined clay

The electrodepositable coating composition with a tin-free catalyst and aliphatic resin achieves high coating utilization and corrosion resistance, addressing environmental and mechanical challenges in electrodeposition methods.

JP2026518068APending Publication Date: 2026-06-03PPG INDUSTRIES OHIO INC
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Patent Information

Authority / Receiving Office
JP Β· JP
Patent Type
Applications
Current Assignee / Owner
PPG INDUSTRIES OHIO INC
Filing Date
2024-05-28
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Existing electrodeposition coating methods face challenges in achieving high coating utilization, superior corrosion resistance, and minimizing environmental pollution, particularly in the absence of catalyst tin, while maintaining effective film formation and mechanical properties.

Method used

An electrodepositable coating composition comprising an active hydrogen-containing ionic base-containing film-forming polymer, a curing agent, an organic resin component with at least 60% aliphatic content, and a calcined clay pigment, along with a tin-free curing catalyst, including bismuth, amine, zinc, zirconium, cerium, amidine, imidazole, or titanium catalysts, to form a binder with specific glass transition temperature domains for enhanced mechanical properties.

Benefits of technology

The composition achieves high coating utilization, superior corrosion resistance, and reduced environmental impact, with improved mechanical properties such as elongation and tensile toughness, while eliminating the need for catalyst tin.

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Abstract

This disclosure relates to an electrodepositable coating composition comprising: an active hydrogen-containing ionic base-containing film-forming polymer; a curing agent; an organic resin component different from the active hydrogen-containing ionic base-containing film-forming polymer and the curing agent, wherein the organic resin component has an aliphatic content of at least 60% by weight based on the total weight of the organic resin component; a curing catalyst that is substantially, essentially, or completely tin-free, and / or includes a bismuth-containing curing catalyst, an amine-containing curing catalyst, a zinc-containing curing catalyst, a zirconium-containing catalyst, a cerium-containing catalyst, an amidine-containing catalyst, an imidazole-containing catalyst, and / or a titanium-containing catalyst; and a calcined clay pigment. Also disclosed are the electrodepositable coating composition, a method for coating a substrate, and the use of the electrodepositable coating composition.
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