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Desmodur® W

Monomeric cycloaliphatic diisocyanate.In the manufacture of polyisocyanates and polyurethanes.

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Material

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General Characterization

Monomeric cycloaliphatic diisocyanate.
In the manufacture of polyisocyanates and polyurethanes.

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 temperatures of approx. 25 °C and below can result in crystallization and appropriate settling at the bottom. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product. Our recommendation in that case is warming the product to 40 - 50°C and homogenization before use.

Sampling

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Packaging Type

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Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
Start of crystallization °C approx. 25
Flash point DIN EN 22 719 °C approx. 200
Total chlorides mg/kg ≤ 1,000
Density at 20 °C DIN EN ISO 2811 g/ml approx. 1.07
Viscosity at 25 °C DIN EN ISO 3219/A.3 mPa*s approx. 30
Vapor pressure at 25 °C hPa approx. 2.1 · 10^-5

Specifications

Property Name Test Method Unit Value
Color value (Hazen) DIN EN 1557 ≤ 30
Assay (GC) internal method % ≥ 99.5
Acidity internal method mg/kg ≤ 10
NCO content (calculated from GC) internal method % ≥ 31.8
Hydrolyzable chlorides internal method mg/kg ≤ 10

Downloads

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

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