Low Free TDI Trimer in High-Performance Industrial Protective PU Coatings Introduction Polyurethane (PU) coatings have become indispensable in modern industrial protection due to their exceptional durability, chemical resistance, flexibility, and adhesion properties. They find wide applications in automotive, aerospace, construction, marine, and general industrial sectors. Among the various isocyanate components used in PU coatings, toluene...