HDX-50BA Fast-drying Matte PU Hardener

HDX-50BA is an aromatic polyisocyanate curing agent based on toluene diisocyanate (TDI) trimer. It serves as the curing agent in two-component polyurethane coatings, enabling rapid drying and providing a matte finish, suitable for both wood and industrial paint applications. Typically, it is used at a concentration of approximately 30%± in the total hardener mixture.


  • Fast-drying
  • Good matting effect
  • High hardness
  • Excellent chemical resistance


  • Specifications

  • Solubility

  • Storage

  • Usage

  • Packaging

Appearance Transperent Liquid
(Fe-Co) Color ≤1#
NCO% 7.8±0.5
Solid Content% 51±2
Viscosity (cps) 1000±500
Free Monomer% TDI≤0.5
Solubility ≥0.6

HDX-50BA exhibits excellent compatibility with esters, ketones, and ether ester solvents. It has limited solubility in aromatic solvents and is not compatible with aliphatics. Prior to usage, it is recommended to conduct stability tests in the chosen solvent and assess its impact on the coating film.

HDX-50BA 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  temperature (0-40°C), protected from direct sunlight and other chemical materials.

  • Solvents, pigments, or extenders used should be free from compounds containing active hydrogen groups, such as water, alcohols, or amines. It is advisable to utilize ‘urethane grade’ solvents with water content below 500 ppm, and aim for a ≥25% solids content after dilution.
  • To achieve optimal results, combine this product with our 75 series curing agent, with a recommended formulation ratio ranging from 5% to 50%.

Net weight:  200Kg Drum

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