Characterization: Aliphatic polyisocyanate (high functional HDI trimer). As the hardener component for lightfast, rapid-drying polyurethane coating systems. Properties / Applications: Desmodur® N 3790 BA is used primarily as the hardener component for lightfast two-component polyurethane coatings with high resistance to chemicals and weathering, very good gloss retention and outstanding mechanical properties. Preferred co-reactants are polyacrylate or polyester polyols. The main applications for systems based on Desmodur® N 3790 BA are air- and force-drying coatings for automotive OEM, automotive refinishing, transportation, industrial finishing and plastics. Information provided by Covestro |