HDI Diourea Covesro N75

HDI Diourea Covesro N75



Aliphatic polyisocyanate (HDI biuret).As the hardener component for lightfast polyurethane coating systems.

Product Types

  • HDI
  • PIC
  • Aliphatic polyisocyanate
  • Crosslinkers
  • Polyisocyanate
  • Hardeners
  • Polyisocyanurate
  • Isocyanate


Coatings, paints & inks:High functional, Weather resistant, Low viscous, Solventborne

General Characterization:

Aliphatic polyisocyanate (HDI biuret).

As the hardener component for lightfast polyurethane coating systems.


Property NameTest MethodUnitValue
Equivalent weightapprox. 255
Viscosity at 25 °CM014-ISO 3219/A.3mPa*sapprox. 140
Flash pointDIN 53 213/1°Capprox. 35
Density at 20 °CDIN EN ISO 2811g/mlapprox. 1.07


Property NameTest MethodUnitValue
Viscosity at 23 °CM014-ISO 3219/A.3mPa*s160 ± 50
NCO contentM105-ISO 11909%16.5 ± 0.3
Color value (Hazen)M017-EN 1557≤ 40
Non-volatile content (2.2 g/120 min/100 °C)M020-ISO 3251%75 ± 1
Monomeric HDIM106-ISO 10283%< 0.38

Storage and Transportation:

STORAGE: It is recommended to store in a dry and cool area with proper ventilation.


200KG/drum Please fasten the packaging cover as soon as possible after original packaging to prevent the mixing of other substances such as moisture and other substances that may affect the performance of the product. Do not inhale dust, avoid skin and mucous membrane contact. Smoking, eating and drinking are prohibited in the workplace. After work, shower and change clothes. Store contaminated clothes separately and reuse them after washing. Maintain good hygiene practices.

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