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Desmodur® ultra N 3790 BA

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

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General Characterization

Desmodur ultra 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 ultra 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.

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Technical Properties & Datasheets

Characteristics

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

Specifications

Property Name Test Method Unit Value
Monomeric HDI % < 0.1
Hazen color value ≤ 40
Non-volatile content (2.2 g / 120 min / 100^oC) % 90 ± 1
Viscosity at 23°C mPa∙s 1,800 ± 500
NCO content % 17.8 ± 0.5

Downloads

Technical Data Sheet
Safety Data Sheet
No direct download available, please visit www.productsafetyfirst.covestro.com

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