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Bayhydur® 305

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

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Product Types

  • Hydrophilic polyisocyanate

Material

No data available

General Characterization

Bayhydur 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 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.

Sampling

No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
NCO content % 15.8 - 16.6
Hazen color value ≤ 150
Monomeric HDI % < 0.15
Viscosity at 23oC mPa∙s 5,000 - 8,000

Property Name Test Method Unit Value
Equivalent weight approx. 260
Density g/cm3 approx. 1.16
Flash point °C approx. 230

Downloads

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