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

Tosoh CORONATE HL Curing Agent

Tosoh CORONATE HL Curing Agent is a high-performance aliphatic polyisocyanate crosslinker from Tosoh’s CORONATE series, designed for premium two-component polyurethane coatings. It offers excellent weather resistance, low viscosity, fast curing at room temperature, and superior gloss retention—ideal for automotive refinish, industrial maintenance, and high-end architectural applications requiring durability and clarity.
  • tosoh coronate hl curing agent_0b25e4f2
  • tosoh coronate hl curing agent_0b25e4f2

Features Of Tosoh CORONATE HL Curing Agent

  1. High-reactivity aliphatic isocyanate-based curing agent with excellent weather resistance and UV stability.

  2. Low viscosity enables easy handling, precise metering, and homogeneous mixing with hydroxyl-functional resins.

  3. Non-yellowing performance ideal for high-gloss, color-critical topcoats in demanding outdoor applications.

  4. Complies with major global VOC regulations, supporting sustainable coating formulation strategies.

  5. Offers balanced pot life and rapid ambient- or forced-dry cure profile for improved production efficiency.

Typical Applications Of Tosoh CORONATE HL Curing Agent

  1. Automotive OEM clearcoats and basecoat/clearcoat systems.

  2. High-performance industrial maintenance coatings for infrastructure and heavy equipment.

  3. Premium architectural coatings requiring long-term gloss retention and chalking resistance.

  4. Aerospace exterior primers and topcoats meeting stringent durability and regulatory requirements.

  5. Wind turbine blade protective coatings exposed to extreme UV, moisture, and thermal cycling.

Specifications Of Tosoh CORONATE HL Curing Agent

Chemical TypeAliphatic polyisocyanate (hexamethylene diisocyanate trimer, HDI-based)
Product FormLiquid
AppearanceClear, pale yellow liquid
NCO Content (wt%)15.5–16.5%
Viscosity at 25°C (mPa·s)1,800–2,400
Density at 25°C (g/cm³)1.18–1.22
Flash Point (Cleveland Open Cup, °C)145–155
SolventAcetate-based (e.g., butyl acetate, ethyl acetate)


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