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

Tosoh CORONATE HX Curing Agent

Tosoh CORONATE HX Curing Agent is a high-reactivity aliphatic polyisocyanate crosslinker from Tosoh’s CORONATE series, designed for premium two-component polyurethane coatings. It offers excellent weather resistance, low viscosity, and fast curing at ambient temperatures—ideal for automotive clearcoats, industrial finishes, and high-gloss applications requiring superior durability and clarity.
  • tosoh coronate hx curing agent_d0681f31
  • tosoh coronate hx curing agent_d0681f31

Features Of Tosoh CORONATE HX Curing Agent

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

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

  3. Provides outstanding chemical resistance, hardness, and gloss retention in final cured coatings.

  4. Compatible with a broad range of polyols including polyester, acrylic, and polyether types for versatile formulation design.

  5. Meets stringent VOC regulations with negligible free monomer content (<0.1% HDI trimer).

Typical Applications Of Tosoh CORONATE HX Curing Agent

  1. Automotive OEM and refinish clearcoats requiring high durability and optical clarity.

  2. Industrial maintenance coatings for metal substrates exposed to harsh environmental conditions.

  3. High-performance wood coatings used in premium furniture and architectural millwork.

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

  5. Two-component polyurethane topcoats for rail, marine, and heavy equipment applications.

Specifications Of Tosoh CORONATE HX Curing Agent

Chemical TypeAliphatic isocyanurate (HDI trimer-based)
Product FormClear, low-viscosity liquid
AppearanceColorless to pale yellow, transparent
NCO Content (wt%)18.5 – 19.5%
Viscosity at 25°C (mPa·s)1,200 – 1,800
Density at 25°C (g/cm³)1.18 – 1.22
Free HDI Monomer (wt%)< 0.1%
Storage Stability≥ 12 months at 25°C in sealed container


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