HDX-190 Fast Drying Aliphatic Polyisocyanate Curing Agents

HDX-190 is an aliphatic polyisocyanate based on HDI Trimer. It can be used as the isocyanate curing agent to formulate lightfast two-component polyurethane coatings. It serves as a suitable substitute for Desmodur N3390 with comparable performance.


  • Non-yellowing
  • Fast drying
  • Hardness
  • Specifications

  • Solubility

  • Storage Conditions

  • Packaging

Product Specification HDX-190
Type HDI Trimer
Appearance Colorless to pale yellow transparent viscous liquid
Color (Hazen) ≤60
NCO% 19.8±0.5
NCO equivalent weight Ca. 212
Free Monomer% HDI≤0.5
Solid content% 90±1
Viscosity/ /25℃  (CPS) 450~650
  • HDX-190 can be diluted with esters, ketones, glycolether acetates or with aromatic hydrocarbons. Only urethane-grade solvents should be used to lessen the possibility of reacting with water.
  • Avoid using solvents containing reactive groups such as water, alcohols, and amines. These solvents can negatively interact with the HDI hardener and compromise its effectiveness.
  • HDX-190 should not be diluted to a solid content of less than 40%. It may experience turbidity or sedimentation during prolonged storage when diluted below this solid content. Storage trials should always be conducted for applications.
  • It is recommended to use “urethane grade” solvent with water content below 500 ppm for the dilution. After dilution, it is advised to have a solid content of at least 25% in the solution.

HDX-190 must be stored in a tightly sealed container to prevent exposure to moisture and air. The products should be placed in a cool, dry indoor environment at room temperature (15-25°C), protected from direct sunlight and other chemical materials.

Net Weight: 200KG /60KG /20KG

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