Water-based coating composition

The use of an acrylic-modified fluoropolymer with DAAM and dihydrazide crosslinking in water-based coatings addresses the water resistance and safety issues of existing coatings, offering stable and environmentally friendly exterior coatings.

JP2026520351APending Publication Date: 2026-06-23ARKEMA INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
ARKEMA INC
Filing Date
2024-04-24
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Water-based coatings lack sufficient water resistance due to surfactants trapped in the coating film during crosslinking, and solvent-based coatings pose safety and environmental hazards, while non-isocyanate crosslinking methods offer safer alternatives but require improved stability and performance.

Method used

Aqueous coating compositions containing an acrylic-modified fluoropolymer with diacetone acrylamide (DAAM) functional groups and dihydrazide for crosslinking, which form stable coatings upon drying, enhancing water resistance and safety.

Benefits of technology

The composition provides stable, water-resistant coatings with improved hardness and chemical resistance, suitable for exterior applications without the use of hazardous solvents.

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Abstract

An aqueous coating composition is provided comprising an acrylic-modified fluoropolymer including a fluoropolymer portion and an acrylic portion, a dihydrazide, optionally an additional polymer that is not part of the acrylic-modified fluoropolymer, and optionally a pigment. The acrylic-modified fluoropolymer composition comprises DAAM monomer units, and preferably the aqueous coating composition contains more than 50% by weight of the polymer based on the total solids content of the aqueous coating composition.
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Citation Information

Patent Citations

  • Cold crosslinkable fluorocopolymer aqueous dispersion composition.

    JP1997165490A

  • Fluoropolymer compositions with improved mechanical dampening

    WO2017091408A1