DL-75 Polyisocyanate Wood Hardener

DL-75 is an aromatic polyisocyanate wood hardener based on TDI adduct. It is used for the formulation of 2K polyurethane coatings and adhesives. Form supplied is 75% in ethyl acetate. DL75 exhibits comparable performance with Desmodur L75.


  • Lower free TDI
  • Light color & Transparent
  • Excellent chemical resistance
  • Excellent solubility
  • High gloss & Good leveling

DL-75 is widely used as hardener component to formulate coatings for high gloss wood furniture paint, parquet flooring, indoor coatings, metal, plastics and more. It also finds applications as crosslinking agent for adhesives to create a strong bond with excellent adhesion that can provide resistance to chemical, heat and other solvents.

  • Specifications

  • Solubility

  • Storage

  • Packaging

  • Molecular Structure

Type TDI Adduct
Appearance Colorless to pale yellow transparent viscous liquid
Color  (Fe-Co) ≤1
Solid Content% 75±2
NCO% 13.0±0.5
Free Monomer% TDI≤0.5
Viscosity (cps) 1500±500
Solubility ≥3.0
  • Solubility in Thinner

DL-75 PU wood hardener are compatible 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.

  • Solubility in Resin

DL-75 PU wood hardener are compatible with all types of polyesters, polyethers, polyacrylates and more. Prior to usage, it is recommended to conduct performance test to achieve precise formulations. When blending with curing agents from other manufacturers, it is advisable to conduct performance tests on the mixture to ensure desired outcomes.

  • Stored in a tightly sealed container to prevent exposure to moisture and air.
  • Placed in a cool, dry indoor environment at  temperature (0-30°C), protected from direct sunlight and other chemical materials.

Net weight: 225KG/drum or customized

Molecular Structure

About Doxu

Pioneers in Specialty Chemicals

Doxu Chemical is among the global leading manufacturers of chemical raw materials for coating and adhesives with THREE production bases since 1988. We aim to provide an extensive line of TDI / HDI / IPDI based polyisocyanates hardeners for coating formulation in various applications.

With a commitment to leading-edge technology and innovation, we always go above and beyond the industry standard to explore chemical products and applications to meet the customers’ needs.

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    Rich History & Expertise

  • 25

    Patens & IP

  • 150000

    Production Area

  • 190000

    Annual Production Capacity

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