Recyclable vitrimer epoxy coatings for durable protection

In this research, the synthesis and application of vitrimer epoxy coatings for long-term corrosion protection metal surfaces are described. To that end, a polyamine curing agent based on vinylogous urethanes (VUs) was developed to add repairability, recyclability recoatability thermosetting materials. Thin films with excellent resistance water penetration damage could be obtained by combining dynamic hardener existing resins, resulting in good barrier properties. Various formulations were investigated yielding transparent durable protection, even after being scratched, exposed saltwater, subjected steam condensation. Furthermore, stress-relaxation experiments revealed sufficient material flow at 150 °C, which significantly slowed down below 100 °C. Optical microscopy used demonstrate healing ability coatings, restoration properties scratching. The resin recoat an aluminium plate as proof concept, demonstrating thin layer adhered surface again its cured state. As result, service life protected metals extended while maintaining mechanical properties, opening door wide range potential applications such marine concrete bonding.