Metallic pigment composition

A metal pigment composition with a controlled polysiloxane coating on the surface addresses corrosion issues in water-based paints, ensuring high water resistance and optical properties while enhancing dispersibility.

JP7783912B2Active Publication Date: 2025-12-10ASAHI KASEI KOGYO KABUSHIKI KAISHA
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Patent Information

Application Number
JP2023570933
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-12-28
Filing Date
2022-12-22
Publication Date
2025-12-10
Estimated Expiration
2042-12-22

AI Technical Summary

Technical Problem

Metallic pigments in water-based paints are prone to corrosion, leading to safety issues and a lack of practical water-based metallic paints with high optical properties and water dispersibility.

Method used

A metal pigment composition with a polysiloxane compound coating on the surface, controlled to have a surface roughness Ra of 0.0 to 2.0 nm and a standard deviation of 1.0 or less, achieved through hydrolysis and condensation of silicon-containing compounds in the presence of a carbonate catalyst, followed by refluxing in a hydrophilic solvent with a basic compound.

Benefits of technology

The composition exhibits high water resistance, excellent optical properties, and improved water dispersibility, maintaining brightness and color tone even with a large polysiloxane compound content.

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Abstract

Provided are a metallic pigment composition endowed with high water resistance as well as exceptional optical properties and water dispersibility, and a novel method for producing the metallic pigment composition.　The present invention is a metallic pigment composition containing metal particles of which the surface is coated with a polysiloxane compound, the metallic pigment composition characterized in that the surface roughness Ra is 0.0-2.0 nm when the roughness of the polysiloxane compound layer present on the particle surface is evaluated by AFM.
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Citation Information

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