• Adhesives
  • Coatings

Bayhydur® 401-70 MPA/X

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


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

General Characterization

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

- Storage in original sealed Covestro container.

- Recommended storage temperature: 0 - 30 °C.

- Protect from moisture, heat and foreign material.

General information: 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.


No data available

Packaging Type

No data available

Technical Properties & Datasheets

Property Name Test Method Unit Value
Color value (Hazen) M017-EN 1557 ≤ 60
Viscosity at 23 °C M014-ISO 3219/A.3 mPa*s 600 ± 200
Monomeric IPDI M106-ISO 10283 % < 0.35
NCO content M105-ISO 11909 % 9.4 ± 0.5
Non-volatile content (0.2 g / 60 min / 120 °C) M020-ISO 3251 % 70 ± 2

Property Name Test Method Unit Value
Equivalent weight approx. 440
Density at 20 °C DIN 53 217/3 g/cm3 approx. 1.07
Flash point DIN 55 213/1 °C approx. 40


Technical Data Sheet
Safety Data Sheet
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