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High reactivity with polyols, enabling fast gelation and reduced cycle times in industrial coating and elastomer production.
Excellent hydrolytic stability due to its aliphatic isocyanate structure, ensuring consistent performance under humid processing conditions.
Low volatility and non-yellowing character, supporting long-term color stability in premium clearcoats and optical applications.
Optimized viscosity for easy handling and precise metering in automated two-component (2K) dispensing systems.
Compliant with major global regulatory frameworks including REACH and TSCA, facilitating safe use across international supply chains.
High-performance automotive clearcoats requiring exceptional gloss, scratch resistance, and UV stability.
Industrial maintenance coatings for steel and concrete substrates exposed to harsh environmental conditions.
Cast polyurethane elastomers used in rollers, seals, and wear-resistant components.
Adhesives and sealants demanding rapid fixture strength and long-term bond integrity.
Coatings for architectural aluminum extrusions where weatherability and aesthetic consistency are critical.
| Chemical Type | Aliphatic polyisocyanate (hexamethylene diisocyanate-based) |
| Product Form | Liquid |
| Appearance | Colorless to pale yellow transparent liquid |
| NCO Content (wt %) | 15.8 – 16.2 |
| Viscosity at 25 °C (mPa·s) | 300 – 500 |
| Density at 20 °C (g/cm³) | 1.14 – 1.16 |
| Flash Point (PMCC, °C) | 155 – 165 |
| Storage Stability (unopened, 25 °C) | ≥ 12 months |
Q1: What is the primary function of Desmodur Z 4470 MPA X in polyurethane systems?
A: Desmodur Z 4470 MPA X is a low-viscosity, aliphatic polyisocyanate curing agent designed to react with hydroxyl-terminated resins—such as polyols or acrylic polyols—to form durable, weather-resistant polyurethane coatings and adhesives. It contributes to excellent gloss retention, UV stability, and mechanical performance in demanding topcoat applications.
Q2: Is Desmodur Z 4470 MPA X compatible with standard polyester and acrylic polyols used in industrial coatings?
A: Yes, it demonstrates broad compatibility with common hydroxyl-functional polyester, acrylic, and hybrid polyols. Its low viscosity and controlled reactivity support good mixing homogeneity and extended pot life in two-component (2K) formulations, particularly for high-solids and low-VOC coating systems.
Q3: How does Desmodur Z 4470 MPA X compare to traditional HDI-based curing agents in terms of processing and film properties?
A: Compared to conventional HDI trimer or biuret types, Desmodur Z 4470 MPA X offers improved storage stability and reduced sensitivity to moisture during handling. It delivers comparable or enhanced hardness development and resistance to abrasion and chemicals while maintaining excellent clarity and non-yellowing performance in clearcoats.
Q4: What are recommended storage conditions to maintain optimal performance?
A: Store in tightly sealed original containers under dry, cool conditions (typically below 30 °C) and protect from moisture, direct sunlight, and excessive heat. Prolonged exposure to humidity or elevated temperatures may lead to premature dimerization or viscosity increase, affecting reactivity and application behavior.
Q5: Can Desmodur Z 4470 MPA X be used in food-contact or pharmaceutical-grade coating applications?
A: Desmodur Z 4470 MPA X is not pre-qualified for direct food-contact applications. Its suitability for regulated end uses depends on full formulation compliance—including final cured film testing—and must be evaluated case by case in coordination with regulatory experts and relevant food safety authorities.
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