Desmodur® N 3790 BA is an aliphatic polyisocyanate (high functional HDI trimer) that acts as the hardener component for lightfast, rapid-drying polyurethane coating systems. It has a non-volatile content (2.2g / 120min / 100°C) of 90 ± 1%, a viscosity at 23°C of 1,800 ± 500 mPa·s, and an equivalent weight of approx. 236.
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.
Covestro (formerly Bayer MaterialScience) manufactures adhesive raw materials for use in the production of contact and heat-activated adhesives, as well as reactive and hot-melt adhesives for the transportation, furniture, footwear, packaging, and construction markets. Bayer offers a comprehensive range based on polyurethane and polychloroprene, with specialty raw materials that offer UV light and weather resistance.
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