Heat-Resistant Electrical-Insulating Varnish Compositions Based on Cyanurethanes for the Electrical Industry

Abstract The dielectric and technological properties of cyanurethane varnish compositions based on isocyanate-containing prepolymers and dicyandiamide for the electrical industry are studied. It is established that the introduction of dicyandiamide improves the dielectric, thermal, and operational properties of the modified compositions. The physicomechanical, physicochemical, dielectric, as well as adhesive-strength properties, of cyanurethane varnish compositions based on isocyanate-containing prepolymers and dicyandiamide are investigated.