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

Tosoh CORONATE HXR 100 Isocyanate Curing Agent

Tosoh CORONATE HXR 100 is a high-reactivity aliphatic polyisocyanate curing agent from Tosoh’s CORONATE series, designed for premium UV- and weather-resistant coatings. It offers excellent gloss retention, low yellowing, and compatibility with hydroxyl-functional resins—ideal for automotive clearcoats, industrial finishes, and aerospace applications requiring durability and clarity.
  • tosoh coronate hxr 100 isocyanate curing agent_4dcf0504
  • tosoh coronate hxr 100 isocyanate curing agent_4dcf0504

Features Of Tosoh CORONATE HXR 100 Isocyanate Curing Agent

  1. High-reactivity aliphatic isocyanate based on hexamethylene diisocyanate (HDI) trimer chemistry.

  2. Low viscosity and excellent compatibility with hydroxyl-functional acrylics, polyesters, and polycarbonates.

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

  4. Compliant with major global VOC regulations including EU Directive 2004/42/EC and U.S. EPA guidelines.

  5. Stabilized formulation offering extended pot life without sacrificing cure speed at ambient or forced-dry conditions.

Typical Applications Of Tosoh CORONATE HXR 100 Isocyanate Curing Agent

  1. Automotive OEM and refinish clearcoats and basecoats.

  2. Industrial maintenance coatings for metal and plastic substrates.

  3. Architectural and coil coatings requiring UV stability and color retention.

  4. High-performance wood finishes for furniture and flooring.

  5. Plastic coatings for automotive interior and exterior trim components.

Specifications Of Tosoh CORONATE HXR 100 Isocyanate Curing Agent

Chemical TypeAliphatic HDI-based trimer isocyanate
Product FormLiquid
AppearanceColorless to pale yellow transparent liquid
NCO Content (wt%)18.5–19.5%
Viscosity @ 25°C (mPa·s)1,200–1,800
Density @ 25°C (g/cm³)1.16–1.19
Flash Point (°C, closed cup)145–155
Storage Stability≥12 months at 25°C in sealed container


Tosoh CORONATE HXR 100 Isocyanate Curing Agent – Frequently Asked Questions (FAQ)

Q1: What is the primary chemical composition of CORONATE HXR 100?

A: CORONATE HXR 100 is a low-viscosity, aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) trimer chemistry, modified to provide enhanced storage stability and reactivity control in two-component polyurethane systems.


Q2: How does CORONATE HXR 100 differ from standard HDI trimer curing agents?

A: It features proprietary stabilization and molecular design that improves pot life while maintaining good film hardness development and yellowing resistance—making it especially suitable for high-performance clearcoats and topcoats requiring long-term gloss and UV stability.


Q3: What types of resins is CORONATE HXR 100 typically compatible with?

A: It is widely used with hydroxyl-functional acrylics, polyesters, and alkyds in solventborne and high-solids two-component polyurethane coatings. Compatibility with waterborne dispersions may require formulation optimization and is not guaranteed without testing.


Q4: What are key handling and storage recommendations?

A: Store in tightly sealed containers under dry, cool conditions (below 30 °C), protected from moisture and direct sunlight. Avoid repeated exposure to ambient humidity during dispensing, as isocyanates are moisture-sensitive and may form surface haze or CO₂ bubbles if contaminated.


Q5: Is CORONATE HXR 100 suitable for food-contact or pharmaceutical coating applications?

A: CORONATE HXR 100 is not pre-qualified for regulated food-contact or pharmaceutical use. Formulators must conduct full regulatory assessment—including migration testing and compliance verification—based on final cured film composition and intended application conditions.



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