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Desmodur® W

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

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Product Types

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

Specifications

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

Downloads

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

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