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Aliphatic polyisocyanate blend offering excellent UV stability and color retention in demanding outdoor applications.
Low viscosity formulation enables easy handling, precise metering, and efficient mixing with hydroxyl-functional resins.
Designed for ambient- or low-temperature curing systems, supporting energy-efficient production processes.
Delivers high crosslink density for superior chemical resistance, hardness, and abrasion performance.
Complies with global regulatory requirements including REACH and meets Covestro’s stringent quality and safety standards.
High-performance industrial maintenance coatings for steel and concrete infrastructure.
Automotive refinish clearcoats requiring long-term gloss retention and weatherability.
Architectural facade coatings exposed to intense sunlight and environmental stressors.
Plastic and composite part coatings in transportation and consumer electronics.
Two-component (2K) polyurethane topcoats for premium wood and metal furniture finishes.
| Chemical Type | Aliphatic polyisocyanate blend (HDI-based) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| NCO Content (wt %) | 13.8 – 14.2 |
| Viscosity at 25 °C (mPa·s) | 800 – 1,200 |
| Density at 20 °C (g/cm³) | 1.17 – 1.19 |
| Flash Point (°C, PMCC) | 125 – 135 |
| Storage Stability (unopened, 25 °C) | ≥ 12 months |
Q1: What is the primary function of Desmodur XP 2565 in coating and adhesive formulations?
A: Desmodur XP 2565 is a low-viscosity, aliphatic polyisocyanate curing agent designed to react with hydroxyl-functional resins—such as polyesters, acrylics, or polyethers—to form durable, chemically resistant polyurethane networks. It enables ambient- or low-bake cure profiles while supporting excellent gloss retention, UV stability, and mechanical performance.
Q2: How does Desmodur XP 2565 compare to traditional HDI-based curing agents in terms of handling and reactivity?
A: Desmodur XP 2565 offers significantly lower viscosity than conventional HDI trimer or biuret types, improving formulation efficiency and reducing solvent demand. Its tailored reactivity profile provides extended pot life compared to highly reactive monomeric isocyanates, while still enabling reliable film formation under mild thermal conditions or extended ambient cure schedules.
Q3: Is Desmodur XP 2565 suitable for high-solids or low-VOC coating systems?
A: Yes—its low viscosity and high functionality allow formulators to achieve high solids content with reduced solvent usage. It is widely used in environmentally compliant coatings targeting VOC reduction, without compromising crosslink density or final film integrity.
Q4: What safety and handling precautions are recommended for Desmodur XP 2565?
A: As with all isocyanates, appropriate personal protective equipment—including nitrile gloves, chemical-resistant goggles, and respiratory protection against aerosols and vapors—is essential. The product should be stored under dry, inert conditions to prevent moisture-induced gelation, and handled in well-ventilated areas to minimize inhalation exposure.
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E-mail: wangxingqiang@ericwchem.com
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