Desmodur® N 3400 is a low viscosity solvent-free aliphatic polyisocyanate (HDI uretdione) resin that can be used as a hardener for 100% solids, solvent-borne and aqueous, two-pack polyurethane coating systems. This product has a density at 20°C of approx. 1.14g/ml, a viscosity at 25°C of approx. 140 mPa·s, and a monomeric HDI of ≤ 0.3%.
Desmodur® N 3400 is used primarily as a reactive thinner or as a hardener component for lightfast two-component polyurethane coatings and as a binder for moisture-curing one-component polyurethane coatings. In two-component systems, Desmodur® N 3400 is usually mixed with other aliphatic polyisocyanates such as Desmodur® N 3200, N 3300, N 3600 and Z 4470.
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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