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

Covestro HDI Trimer Curing Agent Desmodur N 75 BA

Covestro Desmodur® N 75 BA is a HDI trimer-based aliphatic polyisocyanate curing agent in the Desmodur® N series, offering excellent weather resistance, low viscosity, and fast curing for high-performance coatings and adhesives.
  • covestro hdi trimer curing agent desmodur n 75 ba_fde9a5cd
  • covestro hdi trimer curing agent desmodur n 75 ba_fde9a5cd

Features Of Covestro HDI Trimer Curing Agent Desmodur N 75 BA

  1. Low-viscosity aliphatic polyisocyanate trimer offering excellent storage stability and handling safety.

  2. Non-yellowing performance ideal for high-gloss, weather-resistant topcoats and clearcoats.

  3. Reactive NCO content optimized for balanced pot life and rapid film formation at ambient or forced-dry conditions.

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

  5. Compliant with major global VOC regulations when formulated in solventborne and high-solids coating systems.

Typical Applications Of Covestro HDI Trimer Curing Agent Desmodur N 75 BA

  1. Automotive refinish clearcoats and basecoats requiring long-term UV resistance and gloss retention.

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

  3. Powder coating hybrid systems where improved flow and edge coverage are critical.

  4. High-performance wood coatings for furniture and interior architectural millwork.

  5. Plastic coatings for automotive trim, electronics housings, and consumer goods.

Specifications Of Covestro HDI Trimer Curing Agent Desmodur N 75 BA

Chemical TypeAliphatic HDI-based trimer
Product FormLiquid
AppearanceColorless to pale yellow, transparent liquid
NCO Content (wt %)18.5 – 19.5%
Viscosity (25 °C, mPa·s)800 – 1,200
Density (20 °C, g/cm³)1.16 – 1.18
Flash Point (PMCC, °C)135 – 145
Primary ApplicationsTwo-component polyurethane coatings


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