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Bayhydur® ultra 2858

Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI). As a ready-to-use hardener for waterborne two-component polyurethane systems

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Material

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General Characterization

Bayhydur ultra 2858 is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI).
It is suitable for use as a ready-to-use hardener for waterborne two-component polyurethane systems.

Storage Conditions

Bayhydur ultra 2858 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 an increase of color and viscosity. Recommended storage temperature is 0º-30ºC.

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Technical Properties & Datasheets

Characteristics

Property Name Test Method Unit Value
Equivalent weight approx. 316
Flash point °C approx. 88
Density g/cm^3 approx. 1.23

Specifications

Property Name Test Method Unit Value
Monomeric IPDI % < 0.045
Viscosity at 23^oC mPa∙s approx. 500
NCO content % approx. 13.3
Monomeric HDI % < 0.055
Hazen color value < 80

Downloads

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

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