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Low-viscosity aliphatic polyisocyanate offering excellent compatibility with hydroxyl-functional resins.
Non-yellowing formulation suitable for high-gloss and color-stable coating systems.
Fast-reacting with primary and secondary hydroxyl groups, enabling efficient ambient or forced-dry curing.
Compliant with REACH and meets stringent VOC regulations for industrial coatings.
Enhanced chemical resistance and mechanical durability in cured polyurethane films.
Automotive clearcoats and refinish topcoats.
Industrial maintenance coatings for metal and concrete substrates.
High-performance wood coatings requiring clarity and hardness.
Plastic coatings for automotive interior trim and electronics housings.
Two-component (2K) polyurethane adhesives and sealants.
| Chemical Type | Aliphatic polyisocyanate (hexamethylene diisocyanate-based) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| NCO Content (wt %) | 15.5–16.5% |
| Viscosity at 25°C (mPa·s) | 800–1,200 |
| Density at 25°C (g/cm³) | 1.12–1.16 |
| Primary Applications | 2K polyurethane coatings, adhesives, and sealants |
| Key Features | Low VOC, non-yellowing, fast-curing, excellent weather resistance |
Q1: What is the primary chemical class and functionality of EP-HP2033?
A: EP-HP2033 is a low-viscosity, aliphatic polyisocyanate curing agent based on hexamethylene diisocyanate (HDI) trimer chemistry. It features blocked or sterically hindered isocyanate groups, offering improved handling safety and reduced volatility compared to monomeric HDI, while retaining excellent crosslinking performance in two-component polyurethane systems.
Q2: For which types of coating applications is EP-HP2033 especially suitable?
A: EP-HP2033 is optimized for high-performance, two-component polyurethane coatings requiring excellent weather resistance, gloss retention, and mechanical durability — particularly in industrial maintenance, automotive refinish, and premium architectural coatings where low VOC content and good pot life are critical.
Q3: How does EP-HP2033 compare to conventional HDI isocyanate trimers in terms of reactivity and pot life?
A: Due to its tailored molecular structure, EP-HP2033 exhibits moderated reactivity with hydroxyl-functional resins, resulting in extended pot life without compromising final film properties. This enables more flexible application windows and better compatibility with slower-drying binder systems.
Q4: What are key storage and handling recommendations?
A: Store EP-HP2033 in tightly sealed containers under dry, cool conditions (typically below 30 °C) and protect from moisture, heat, and direct sunlight. Avoid exposure to ambient humidity during handling, as isocyanates react readily with water; use dry nitrogen blanketing for prolonged storage or dispensing systems when feasible.
Q5: Can EP-HP2033 be used in solvent-free or high-solids formulations?
A: Yes — its inherently low viscosity and high isocyanate functionality make EP-HP2033 well-suited for solvent-free, high-solids, and low-VOC polyurethane systems. It facilitates formulation flexibility while maintaining good mixing homogeneity and film formation characteristics.
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E-mail: wangxingqiang@ericwchem.com
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