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Bayhydur® 2547

Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI). Hardener for waterborne two-component polyurethane coatings.

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Material

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General Characterization

Bayhydur 2547 is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI).
It is suitable as a hardener for waterborne two-component coatings, top coats, sealers and as an additive to enhance the property profile.

Storage Conditions

Bayhydur 2547 should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. Hydrophilic isocyanates are very moisture-sensitive and react with water to form carbon dioxide and insoluble ureas. The containers must always be kept tightly closed. The access of water in all forms (moist air, solvents, moist containers) must be prevented, because the generation of carbon dioxide can lead to dangerous increases in pressure. Storage at higher temperatures will result in increase of color and viscosity. Recommended storage temperature is 0º-30ºC.

Sampling

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Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
Flash point °C approx. 185
Density at 20°C g/ml approx. 1.15

Specifications

Property Name Test Method Unit Value
Monomeric HDI % < 0.5
NCO content % 22 - 23
Hazen color value ≤ 150
Viscosity at 23°C mPa∙s 570 - 730

Downloads

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

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