High-reactivity aliphatic isocyanate based on hexamethylene diisocyanate (HDI) trimer chemistry.
Low viscosity and excellent compatibility with hydroxyl-functional acrylics, polyesters, and polycarbonates.
Non-yellowing performance ideal for high-gloss, weather-resistant topcoats and clearcoats.
Compliant with major global VOC regulations including EU Directive 2004/42/EC and U.S. EPA guidelines.
Stabilized formulation offering extended pot life without sacrificing cure speed at ambient or forced-dry conditions.
Automotive OEM and refinish clearcoats and basecoats.
Industrial maintenance coatings for metal and plastic substrates.
Architectural and coil coatings requiring UV stability and color retention.
High-performance wood finishes for furniture and flooring.
Plastic coatings for automotive interior and exterior trim components.
| Chemical Type | Aliphatic HDI-based trimer isocyanate |
| Product Form | Liquid |
| Appearance | Colorless 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 |
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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