• Adhesives
  • Coatings

Bayhydur® 401-70

Hydrophilically modified aliphatic IPDI-polyisocyanate. As a co-reactant for aqueous resins and as a hardener for chemically resistant and weather-stable coating systems.

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Product Types

  • PIC
  • Crosslinkers
  • Hardeners
  • Aliphatic polyisocyanate
  • Isocyanate
  • Hydrophilic polyisocyanate
  • Polyisocyanurate
  • Reactive system
  • Polyisocyanate


Waterborne, Foam bonding, Heat activated, Moisture resistant
Easy mixing, Hard, Weather resistant, Waterborne

General Characterization

Bayhydur 401-70 is a hydrophilically modified aliphatic polyisocyanate based on isophorone diisocyanate (IPDI).
As the co-reactant for aqueous resins and as the hardener for chemically resistant and weather-stable coating systems.

Storage Conditions

Bayhydur 401-70 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.


No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
Color value ≤ 60
NCO content % 8.9 - 9.9
Monomeric IPDI % < 0.35
Viscosity at 23<sup>o</sup>C, (D = 81,8 s<sup>-1</sup>) mPa∙s 400 - 800
Non-volatile content (0.2 g / 60 min / 120<sup>o</sup>C) % 68 - 72

Property Name Test Method Unit Value
Density at 20<sup>o</sup>C g/cm<sup>3</sup> approx. 1.07
Equivalent weight approx. 440
Flash point °C approx. 40


Technical Data Sheet
Safety Data Sheet
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