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Desmodur® DN

Hydrophilic aliphatic HDI-polyisocyanate. Emulsifiable in aqueous polymer and synthetic rubber dispersions. Raises the resistance of bonds to heat, water and plasticizers.

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Product Types

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Material

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General Characterization

Aliphatic polyisocyanate of low volatility.
Desmodur® DN is a solvent-free liquid polyisocyanate that is emulsifiable in water. Any occasional turbidity or precipitation visible is caused by very small amounts of processing aids These have no adverse effect on the processing and final properties of the cured adhesives. It can be used as the crosslinker for largely pH-neutral aqueous polymer dispersions including polyurethane, polyvinyl acetate, polyacrylate and synthetic rubber dispersions. Crosslinking increases the resistance of the bonds to heat, water, plasticisers and many solvents. Compared with Desmodur® DA, Desmodur® DN is characterised by its much lower viscosity and is not prone to turbidity at low storage temperatures.

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.

Sampling

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Packaging Type

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Technical Properties & Datasheets

Property Name Test Method Unit Value
HDI monomer content DIN EN ISO 10283 % ≤ 0.25
NCO content DIN EN ISO 11 909, Annex A % 21.8 ± 0.5
Viscosity at 23 °C, Rotation DIN EN ISO 3219/A.3 mPa*s 1,250 ± 300

Property Name Test Method Unit Value
Flash point DIN 51 755 °C approx. 218
Density at 20 °C DIN 51 757 g/cm3 approx. 1.15
Solids content % 100

Downloads

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