• Coatings

Desmodur® N 3790 BA

Aliphatic polyisocyanate (high functional HDI trimer). As the hardener component for lightfast, rapid-drying polyurethane coating systems.

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Product Types

  • PIC
  • Crosslinkers
  • Hardeners
  • Aliphatic polyisocyanate
  • Isocyanate
  • Polyisocyanurate
  • Polyisocyanate


High functional, Solventborne, Weather resistant

General Characterization

Desmodur N 3790 BA is an aliphatic polyisocyanate (high functional HDI trimer).
It is suitable for use as the hardener component for lightfast, rapid-drying polyurethane coating systems.

Storage Conditions

Desmodur N 3790 BA should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. The product is sensitive to moisture. Storage at higher temperatures will result in increase of color and viscosity. Storage at significant lower temperatures will result in solidification. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product. Recommended storage temperature is 0º-30ºC.


No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
NCO content % 17.8 ± 0.5
Viscosity at 23°C mPa∙s 1,800 ± 500
Hazen color value ≤ 40
Monomeric HDI % < 0.23
Non-volatile content (2.2 g / 120 min / 100oC) % 90 ± 1

Property Name Test Method Unit Value
Equivalent weight approx. 236
Specific gravity at 20°C g/ml approx. 1.13
Weight per gallon at 20°C 9.41
Flash point °C approx. 42
Viscosity at 25°C mPa∙s approx. 1,600


Technical Data Sheet
Safety Data Sheet
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