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Low-viscosity aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) trimer chemistry.
Excellent weather resistance and UV stability, enabling long-term gloss and color retention in outdoor applications.
Compatible with a broad range of hydroxyl-functional resins including polyesters, acrylics, and polyethers.
Offers balanced reactivity for efficient curing at ambient or elevated temperatures without excessive pot life restriction.
Meets stringent VOC regulations with low monomer content and high functionality consistency.
High-performance automotive clearcoats and basecoats.
Industrial maintenance coatings for machinery and infrastructure.
Architectural façade and coil coating systems.
Plastic and wood coatings requiring excellent flexibility and adhesion.
Two-component (2K) polyurethane topcoats for demanding protective applications.
| Chemical Type | Aliphatic HDI-based polyisocyanate (trimer) |
| Product Form | Liquid |
| Appearance | Clear, pale yellow liquid |
| NCO Content (wt. %) | Approx. 13.5–14.2% |
| Viscosity (25 °C, mPa·s) | 800–1,200 |
| Density (20 °C, g/cm³) | 1.19–1.22 |
| Monomeric HDI Content | < 0.5 wt.% |
| Storage Stability | ≥ 12 months at 20–25 °C in sealed original container |
Q1: What types of resins is B1400 compatible with?
A: B1400 is specifically designed as a curing agent for hydroxyl-functional resins, including polyester polyols, acrylic polyols, and alkyd resins. It is widely used in two-component polyurethane systems for high-performance industrial coatings.
Q2: How does B1400 compare to traditional HDI-based curing agents in terms of pot life and film formation?
A: B1400 offers extended pot life compared to conventional aliphatic isocyanate curing agents while maintaining excellent reactivity under ambient or forced-dry conditions. Its molecular design supports balanced cure kinetics, enabling good flow, leveling, and full crosslink development without excessive surface tackiness.
Q3: Is B1400 suitable for low-VOC or high-solids coating formulations?
A: Yes — B1400 has low volatility and high functionality per molecule, making it well-suited for low-VOC and high-solids PU systems. It enables formulators to reduce solvent demand while achieving robust crosslink density and mechanical performance.
Q4: What storage and handling precautions are recommended?
A: Store in tightly sealed containers under dry, inert atmosphere (e.g., nitrogen blanket) at temperatures between 10–30 °C. Avoid exposure to moisture, heat, or strong oxidizing agents. Use appropriate PPE, including chemical-resistant gloves and eye protection, during handling.
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