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<p>Traditional anticorrosion coatings often fail due to localized damage that degrades their protective performance. To address this challenge, a self-healing microcapsule system was developed using isophorone diisocyanate (IPDI) as the core material and melamine formaldehyde (MF) resin as the shell material. By optimizing process parameters—specifically using 6&#xa0;g of methoxylated melamine formaldehyde resin prepolymer (MMF) and 9&#xa0;g of IPDI, with a TEPA/D230 mass ratio of 1:1.5 and an SMA/TO-8 mass ratio of 3:1—the core material encapsulation efficiency was increased to 64.85%. Application tests showed that incorporating microcapsules at 1–10% by mass in the coating significantly inhibited rust formation in damaged areas, demonstrating excellent self-healing capabilities. These results indicate that this microcapsule system effectively enhances localized damage repair in coatings, offering a novel approach for developing self-healing anticorrosion technologies. This work establishes a scalable strategy for next-generation protective coatings, bridging the gap between high core retention and industrial process compatibility.</p> Graphical abstract <p></p>

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Preparation of melamine resin isocyanate self-healing microcapsules and their application in self-healing coatings

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Fuzhuang Jia,
  • Chenwei Lin,
  • Yingmin Yuan,
  • Yanhong Du,
  • Baolian Zhang

摘要

Traditional anticorrosion coatings often fail due to localized damage that degrades their protective performance. To address this challenge, a self-healing microcapsule system was developed using isophorone diisocyanate (IPDI) as the core material and melamine formaldehyde (MF) resin as the shell material. By optimizing process parameters—specifically using 6 g of methoxylated melamine formaldehyde resin prepolymer (MMF) and 9 g of IPDI, with a TEPA/D230 mass ratio of 1:1.5 and an SMA/TO-8 mass ratio of 3:1—the core material encapsulation efficiency was increased to 64.85%. Application tests showed that incorporating microcapsules at 1–10% by mass in the coating significantly inhibited rust formation in damaged areas, demonstrating excellent self-healing capabilities. These results indicate that this microcapsule system effectively enhances localized damage repair in coatings, offering a novel approach for developing self-healing anticorrosion technologies. This work establishes a scalable strategy for next-generation protective coatings, bridging the gap between high core retention and industrial process compatibility.

Graphical abstract