Desmodur N 3390 BA/SN is an aliphatic polyisocyanate (HDI trimer) used as the hardener component for lightfast polyurethane coatings systems. It has a non-volatile content (2.2g / 120min / 100°C) of 90 ± 1%, a viscosity at 25°C of approx. 500 mPa·s, and a monomeric HDI of ≤ 0.15%. Desmodur N 3390 BA/SN 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 3390 BA/SN are air- and force-drying coatings for automotive OEM, automotive refinishing, transportation, industrial finishing and plastics.
Covestro (formerly Bayer MaterialScience) provides raw materials, such as waterborne adhesives, major high solids coatings, advanced powder coatings, and specialty sealant chemistries. Bayer produces polycarbonates and polycarbonate blends, polyurethanes, and TPU resins, particularly for design and processing parts with TPU resins applications; helping products in a wide variety of applications look better and last longer.
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