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

Covestro HDI Trimer Curing Agent Desmodur N 3375 MPA

Covestro Desmodur N 3375 MPA is a high-performance HDI trimer-based aliphatic polyisocyanate curing agent from the Desmodur N series, offering excellent weather resistance, low viscosity, and fast curing for premium coatings and adhesives.
  • covestro hdi trimer curing agent desmodur n 3375 mpa_e17e0f35
  • covestro hdi trimer curing agent desmodur n 3375 mpa_e17e0f35

Features Of Covestro HDI Trimer Curing Agent Desmodur N 3375 MPA

  1. Low-viscosity aliphatic isocyanate trimer offering excellent flow and leveling in coating formulations.

  2. Excellent UV stability and color retention, ideal for high-performance exterior coatings.

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

  4. Reactive NCO content optimized for balanced pot life and rapid ambient or forced-dry cure performance.

  5. Free from solvents and aromatic isocyanates — supports low-VOC and safer handling profiles.

Typical Applications Of Covestro HDI Trimer Curing Agent Desmodur N 3375 MPA

  1. Automotive OEM and refinish clearcoats requiring exceptional gloss and durability.

  2. Industrial maintenance coatings for metal substrates exposed to harsh outdoor environments.

  3. High-end plastic coatings for automotive interior trim and consumer electronics housings.

  4. Architectural pre-finished metal (PPM) coatings demanding long-term weather resistance.

Specifications Of Covestro HDI Trimer Curing Agent Desmodur N 3375 MPA

Chemical TypeAliphatic HDI-based isocyanurate trimer
Product FormLiquid
AppearanceClear, pale yellow liquid
NCO Content (wt %)15.8 – 16.4
Viscosity at 25 °C (mPa·s)1,800 – 2,400
Density at 20 °C (g/cm³)1.18 – 1.20
Flash Point (PMCC, °C)145 – 155
Storage Stability≥12 months in sealed original container at ≤25 °C


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