Desmodur® N 3500
Desmodur N 3500 is an aliphatic polyisocyanate (HDI allophanate trimer). It is used as the hardener component for solvent-free, lightfast, scratch-resistant polyurethane coating systems.
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About
Product Types
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Material
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General Characterization
Desmodur N 3500 is an aliphatic polyisocyanate (HDI allophanate trimer).
It is used as the hardener component for solvent-free, lightfast, scratch-resistant polyurethane coating systems.
It is used as the hardener component for solvent-free, lightfast, scratch-resistant polyurethane coating systems.
Storage Conditions
Desmodur N 3500 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 5º-30ºC.
Sampling
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Packaging Type
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Technical Properties & Datasheets
Characteristics
| Property Name | Test Method | Unit | Value |
|---|---|---|---|
| Equivalent weight | approx. 215 | ||
| Viscosity at 50^oC | mPa∙s | approx. 4,200 | |
| Density at 20^oC | g/cm^3 | approx. 1.17 | |
| Flash point | °C | 208 |
Specifications
| Property Name | Test Method | Unit | Value |
|---|---|---|---|
| NCO-content | % | approx. 19.5 | |
| Viscosity at 23^oC | mPa∙s | approx. 35,000 | |
| Monomeric HDI | % | < 0.25 | |
| Color value (Hazen) | < 100 |
Downloads
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Technical Data Sheet
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Safety Data SheetNo direct download available, please visit www.productsafetyfirst.covestro.com
