English
Español
tiếng việt
русский
Low-viscosity aliphatic polyisocyanate trimer offering excellent storage stability and handling safety.
Non-yellowing performance ideal for high-gloss, weather-resistant topcoats and clear finishes.
Fast-reacting with polyols to deliver outstanding chemical resistance and mechanical durability.
Compliant with stringent VOC regulations due to its low monomer content (< 0.5 wt%).
Consistent batch-to-batch quality supported by Covestro’s global manufacturing standards.
Automotive OEM clearcoats and refinish topcoats requiring long-term UV stability.
Industrial maintenance coatings for metal and plastic substrates in harsh environments.
High-performance wood coatings used in premium furniture and flooring applications.
Plastic coatings for automotive interior parts and consumer electronics housings.
Two-component (2K) polyurethane systems for architectural façade and infrastructure protection.
| Chemical Type | Aliphatic HDI-based isocyanurate trimer |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| NCO Content (wt %) | 18.5 – 19.5 |
| Viscosity at 25 °C (mPa·s) | 2,000 – 3,000 |
| Density at 20 °C (g/cm³) | 1.21 – 1.23 |
| Monomer (HDI) Content (wt %) | < 0.5 |
| Storage Stability (unopened, 25 °C) | ≥ 12 months |
Q1: What is the primary chemical composition and functional advantage of Desmodur N 3600?
A: Desmodur N 3600 is a low-viscosity, aliphatic HDI-based trimer isocyanurate, offering excellent weather resistance, UV stability, and low yellowing tendency. Its trifunctional structure provides efficient crosslinking in polyurethane coatings while maintaining good pot life and film clarity.
Q2: How does Desmodur N 3600 compare to other HDI trimers in terms of reactivity and handling?
A: Compared to standard HDI trimers, Desmodur N 3600 features optimized steric and electronic properties that deliver balanced reactivity—sufficient for ambient or low-bake curing without excessive sensitivity to moisture. It exhibits good storage stability and consistent viscosity over time when kept under dry, cool conditions.
Q3: Is Desmodur N 3600 suitable for high-solids or solvent-free coating systems?
A: Yes, its low viscosity and high functionality make it well-suited for high-solids formulations. It can also be incorporated into certain solvent-free or waterborne two-component polyurethane systems when paired with appropriate dispersible polyols and stabilizers.
Q4: What are key safety and handling considerations during formulation?
A: As with all isocyanates, Desmodur N 3600 requires handling in well-ventilated areas with appropriate personal protective equipment (PPE), including nitrile gloves, eye protection, and respiratory protection where airborne concentrations may exceed occupational exposure limits. Avoid contact with moisture and ensure containers remain tightly sealed to prevent gelation.
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
Have a Questions? Call Us:
Add:
Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
