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Bayhydur® ultra 305

Hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI). As a hardener for aqueous two-component polyurethane systems.

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General Characterization

Bayhydur ultra 305 is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI).
It is suitable as a hardener for aqueous two-component polyurethane systems.

Storage Conditions

Bayhydur ultra 305 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 highertemperatures will result in 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
Density g/cm^3 approx. 1.16
Flash point °C approx. 230
Equivalent weight approx. 260

Specifications

Property Name Test Method Unit Value
Monomeric HDI % < 0.10
Viscosity at 23^oC mPa∙s 5,000 - 8,000
Color value (Hazen) ≤ 150
NCO content % 15.8 - 16.6

Downloads

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

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