HDX-175MPX Non-yellowing Aliphatic Polyisocyanate Hardener

HDX175-MPX is an aliphatic polyisocyanate curing agents/crosslinkers based on HDI biuret. It can be used as the hardener component for lightfast and weather-stable two-component polyurethane coating or adhesive systems.


  • Non-yellowing
  • Excellent physical properties
  • Excellent weather&Chemical resistance
  • Adhesion& Flexibility

HDX-175MPX is recommended to be used in applications such as interior/exterior wood coatings for floor, furniture, automotive OEM& refinish and general industrial metal coating applications.

  • Specifications

  • Solubility

  • Storage Conditions

  • Packaging

Product Specification HDX-175MPX
Type HDI Biuret
Appearance Colorless to pale yellow transparent viscous liquid
Color (Hazen)# <1
NCO% 16.5±0.5
Free Monomer% HDI≤0.5
Solid content% 75±1
Viscosity/ /25℃  (CPS) 130~300
  • HDX175-MPX PU hardener can be diluted with esters, ketones, glycolether acetates or with aromatic hydrocarbons. Only urethane-grade solvents should be used with water content below 500 ppm. Storage trials should always be conducted for applications.
  • Avoid using solvents that contain reactive groupsuch as water, alcohols, amines. These solvents can negatively interact with the HDI hardener and compromise its effectiveness.
  • HDX175-MPX PU hardener 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.
  • After dilution, it is advised to have a solid content of at least 25% in the solution.

HDX-175MPX PU hardener 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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