Desmodur® U N 3790 BA

Aliphatic polyisocyanate (high functional HDI trimer).

Contact an Expert
Market Switch
Selection will influence the results you get.
Copied to clipboard


Product Types

No data available


No data available

General Characterization

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

Storage Conditions

- Storage in original sealed Covestro container.

- Recommended storage temperature: 0 - 30 °C.

- Protect from moisture, heat and foreign material.

General information: 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.


No data available

Packaging Type

No data available

Technical Properties & Datasheets


Property Name Test Method Unit Value
NCO content DIN EN ISO 11 909 % 17.8 ± 0.5
Viscosity at 23 °C DIN EN ISO 3219/A.3 mPa*s 1,800 ± 500
Non-volatile content (2.2 g / 120 min / 100 °C) DIN EN ISO 3251 % 90 ± 1
Color value (Hazen) DIN EN 1557 ≤ 40
Monomeric HDI DIN EN ISO 10 283 % < 0.1


Property Name Test Method Unit Value
Viscosity at 25 °C DIN EN ISO 3219/A.3 mPa*s approx. 1,600
Density at 20 °C DIN EN ISO 2811 g/ml approx. 1.13
Equivalent weight approx. 236
Flash point DIN 53 213/1 °C approx. 42


Technical Data Sheet
Safety Data Sheet
No direct download available, please visit

Related topics