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

Covestro Desmodur 44V20L Curing Agent

Covestro Desmodur 44V20L is a high-performance aliphatic polyisocyanate curing agent from the Desmodur® V series, designed for UV- and thermally cured coatings. It delivers excellent weather resistance, low viscosity, and fast reactivity—ideal for premium automotive clearcoats and industrial finishes requiring superior gloss and durability.
  • covestro desmodur 44v20l curing agent_e56c5317
  • covestro desmodur 44v20l curing agent_e56c5317

Features Of Covestro Desmodur 44V20L Curing Agent

  1. Low-viscosity liquid MDI-based polyisocyanate offering excellent processability in ambient-cure and heat-cure systems.

  2. Contains no added solvents — supports VOC-compliant formulations and sustainable manufacturing practices.

  3. Provides balanced reactivity for controlled pot life and efficient film formation in two-component polyurethane coatings.

  4. Delivers outstanding chemical resistance, hardness, and gloss retention in demanding industrial finishes.

  5. Compatible with a broad range of polyols including polyester, acrylic, and polyether types.

Typical Applications Of Covestro Desmodur 44V20L Curing Agent

  1. Industrial maintenance coatings for metal substrates (e.g., machinery, storage tanks, structural steel).

  2. High-performance automotive refinish clearcoats and basecoat/clearcoat systems.

  3. Wind turbine blade protective coatings requiring UV stability and erosion resistance.

  4. Railway vehicle exterior and interior coating systems meeting fire-safety standards (e.g., EN 45545).

  5. General-purpose two-component polyurethane topcoats for architectural and infrastructure applications.

Specifications Of Covestro Desmodur 44V20L Curing Agent

Chemical TypeMethylene diphenyl diisocyanate (MDI)-based aliphatic-modified aromatic polyisocyanate
Product FormClear to pale yellow liquid
AppearanceHomogeneous, transparent liquid at 25 °C
NCO Content (wt %)19.5 – 20.5
Viscosity at 25 °C (mPa·s)150 – 250
Density at 25 °C (g/cm³)1.20 – 1.24
Flash Point (PMCC, °C)170 – 180
Primary ApplicationsTwo-component polyurethane coatings and adhesives


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