Desmodur® N 3390 BA is a low-viscosity aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI), supplied in n-butyl acetate. It is designed as a hardener for lightfast two-component polyurethane coatings.
| Supplier | |
|---|---|
| Additive Classification | Curing Agent |
| Industry | Adhesives, Automotive & Transportation, Building & Construction, Electrical & Electronics, HI&I Care, Home Renovation, Marine Vessels, Paints & Coatings, Petrochemical, Wind Energy |
·PIC
·Polyisocyanurate
·Reactive system
·TDI
·Aromatic polyisocyanate
·Crosslinkers
·Polyisocyanate
·Hardeners
Desmodur® N 3390 BA can be thinned with esters, ketones and aromatic hydrocarbons such as ethyl acetate, butyl acetate, methoxypropylacetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene, xylene, solvent naphtha® 100 and mixtures thereof. Generally speaking, it has good compatibility with the solvents listed. However, the solutions formed must be tested for their storage stability. Only PU grade solvents should be used (max. 0.05 % water, absence of reactive groups such as hydroxyl or amino groups). Aliphatic hydrocarbons are unsuitable as solvents. Desmodur® N 3390 BA should not be thinned to below a solids content of 40 %. Prolonged storage of a solution with a lower binder content may result in turbidity and sedimentation.
Desmodur® N 3390 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 3390 BA are air- and force-drying coatings for automotive OEM, automotive refinishing, transportation, industrial finishing and plastics.
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