Synthesis of isocyanate - urethane microcapsules as non-catalyst healing agent in self-healing coatings

Microcapsules containing isophorone diisocyanate (IPDI) as healing agents for using in self-healing polymers have been successfully prepared via interfacial polymerization of polyurethane (PU). Microcapsules were manufactured using 1,4-butandiol as polyol. The fabrication of PU prepolymer and microencapsulation of IPDI were proved by thermo-gravimetric analysis (TGA). High yields of IPDI/PU microcapsules were obtained by thermogravimetric analysis (TGA). Scanning electron microscopy (SEM) showed synthesis of smooth spherical microcapsules of 1.7 to 2 micron in diameter

Keywords:

Urethane microcapsules , interfacial polymerization , self-healing , isophorone diisocyanate