Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Covestro Desmodur N75 Curing Agent

Covestro Desmodur N75 Curing Agent is a premium aliphatic polyisocyanate crosslinker from the Desmodur N series. It delivers excellent UV stability, gloss retention, and weather resistance for high-performance two-component polyurethane coatings. Widely used in automotive refinish, industrial wood, and plastic coatings. Solvent-based, low-viscosity, and compatible with common OH-functional resins.
  • covestro desmodur n75 curing agent_6ca622ea
  • covestro desmodur n75 curing agent_6ca622ea

Features Of Covestro Desmodur N75 Curing Agent

  1. Highly reactive aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) trimer.

  2. Excellent weather resistance and UV stability — ideal for outdoor applications requiring long-term gloss and color retention.

  3. Low volatility and low monomer content, supporting safer handling and compliance with VOC regulations.

  4. Good compatibility with a wide range of hydroxyl-functional resins including polyesters, acrylics, and polyethers.

  5. Enables formulation of high-performance two-component (2K) polyurethane coatings with balanced pot life and rapid cure development.

Typical Applications Of Covestro Desmodur N75 Curing Agent

  1. Automotive OEM and refinish clearcoats and basecoats.

  2. Industrial maintenance coatings for machinery, rail, and agricultural equipment.

  3. High-end architectural coatings for façades, windows, and metal cladding.

  4. Plastic coatings for automotive interior trim and consumer electronics housings.

  5. Wood coatings for premium furniture and flooring requiring durability and aesthetic clarity.

Specifications Of Covestro Desmodur N75 Curing Agent

Chemical TypeHDI-based aliphatic polyisocyanate trimer
Product FormLiquid
AppearanceClear, pale yellow to colorless liquid
NCO Content (wt %)15.5 – 16.5
Viscosity at 25 °C (mPa·s)1,500 – 3,500
Density at 20 °C (g/cm³)1.19 – 1.23
Monomeric HDI Content (max)0.5 wt %
SolventAcetate ester blend (e.g., butyl acetate)


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