Description
Solubility / thinnability:
Desmodur N 3390 BA/SN 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/SN 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.
Compatibility:
Generally speaking, Desmodur N 3390 BA/SN can be mixed with the following products: aliphatic polyisocyanates such as Desmodur N 100, N 75, N 3200, N 3400, N 3600 and Desmodur Z 4470; aromatic polyisocyanates such as Desmodur L, HL and IL; polyester polyols such as Desmophen 670; polyacrylates such as the Desmophen A products. However, the compatibility of the combinations used should always be tested. Desmodur N 3390 BA/SN is not compatible with branched polyester polyols such as Desmophen 651 or polyether polyols such as Desmophen 1380 BT.
Properties / Applications:
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.
Storage:
The product is sensitive to moisture and should therefore always be stored in tightly sealed original containers. When stored under the proper conditions at room temperature, the product will remain stable for at least 6 months.
Safety:
Hazards identification:
Flammable. May cause sensitization by skin contact. Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. Contains isocyanates.
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