The ability of polymeric coatings to self-heal from mechanical damage is explored in this paper. Polymeric coatings with self-healing property isoneof the important aspects in science. It can be used in industries such as oil industry (protect against corrosion), mechanical engineering, aircraft, etc. The PU microparticles were synthesized on the basis of PPG and TDI with a method of interfacial polycondensation at the interface water-benzene. Further to study the surface morphology of the microcapsules with healing agent (TMPTA) obtained PU was applied the method of scanning electron and atomic force microscopy. The PU microparticles hollow inside have regular spherical shape with a diameter of 5-10 μm with a dense and smooth polymeric shell. The resulting polyimide – polyurethane (PI – PU) composites have high potential to regenerate damaged surfaces not only on the surface and also in the volume of composite.