HDI trimer Covesro N3390 ABOUT:   Characterization Aliphatic polyisocyanate (HDI trimer). As the hardener component for lightfast polyurethane coating systems Form supplied approx. 90 % in n-butyl acetate   Specification: Property Value Unit of measurement Method NCO content 19.6 ± 0.3 % M105-ISO 11909 Non-volatile content (2.2 g / 120 min / 100 °C) 90 ±...