Description
Solubility / thinnability:
Desmodur N 75 MPA/X 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 75 MPA/X 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 75 MPA/X can be mixed with the following products: aliphatic polyisocyanates such as Desmodur N 3200, N 3300, N 3400, N 3600 and Desmodur Z 4470; aromatic polyisocyanates such as Desmodur L, HL and IL; polyester polyols such as Desmophen® 651 and 670; polyacrylates such as the Desmophen A products; polyether polyols such as Desmophen 1380 BT. However, the compatibility of the combinations used should always be tested.
Properties / Applications:
Desmodur N 75 MPA/X 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 75 MPA/X are as air- and force-drying coatings for automotive and industrial finishing, for wood, furniture and plastics and for corrosion protection.
Storage:
The product is sensitive to moisture and should therefore always be stored in sealed containers. When stored under the proper conditions at room temperature, the product will remain stable for at least 6 months.
Safety:
Hazards identification:
Flammable. Harmful by inhalation and in contact with the skin. May cause sensitization by skin contact. Contains isocyanates. Risk of absorption through the skin of xylene and ethylbenzene.
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