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Aliphatic HDI-based polyisocyanate with excellent UV stability and color retention.
Low monomer content (<0.5% free HDI) for enhanced occupational safety and regulatory compliance.
Optimized viscosity (≈1,800–2,200 mPa·s at 25°C) enabling easy handling and compatibility with standard coating equipment.
High functionality and reactivity with hydroxyl-terminated resins, delivering rapid cure kinetics at ambient or low-bake conditions.
Excellent compatibility with acrylic, polyester, and polyol-based resin systems without phase separation.
Automotive clearcoats and basecoats requiring long-term gloss retention and weather resistance.
Industrial maintenance coatings for metal and plastic substrates in transportation and construction sectors.
High-performance can and coil coatings demanding film hardness, flexibility, and chemical resistance.
Precision optical and electronic encapsulation coatings where clarity and low yellowing are critical.
| Chemical Type | Aliphatic polyisocyanate (HDI trimer) |
| Product Form | Liquid |
| Appearance | Colorless to pale yellow transparent liquid |
| NCO Content (wt%) | 15.5–16.5% |
| Viscosity (mPa·s at 25°C) | 1,800–2,200 |
| Free HDI Content | <0.5 wt% |
| Density (g/cm³ at 25°C) | 1.13–1.17 |
| Flash Point (°C, closed cup) | 145–155 |
Q1: What is the primary chemical nature of CORONATE 2715?
A: CORONATE 2715 is a low-viscosity, aliphatic polyisocyanate curing agent based on hexamethylene diisocyanate (HDI) trimer chemistry, designed for ambient- or low-bake two-component polyurethane systems.
Q2: How does CORONATE 2715 compare to aromatic isocyanates in terms of performance and application suitability?
A: Unlike aromatic isocyanates, CORONATE 2715 offers excellent UV stability and color retention, making it ideal for high-performance topcoats and clearcoats where gloss maintenance and resistance to yellowing are critical—especially in automotive refinish, industrial maintenance, and premium architectural coatings.
Q3: What types of resins is CORONATE 2715 typically formulated with?
A: It is commonly paired with hydroxyl-functional acrylics, polyesters, and alkyds in 2K PU systems. Its low viscosity and good compatibility support efficient mixing and extended pot life when used with properly selected co-solvents and catalysts.
Q4: What are key handling and storage considerations for this product?
A: CORONATE 2715 is moisture-sensitive and must be stored under dry, inert conditions—preferably under nitrogen—and protected from humidity, heat, and direct sunlight. Containers should be tightly sealed after use to prevent gelation or viscosity increase due to reaction with atmospheric moisture.
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