English
Español
tiếng việt
русский
High-performance aliphatic polyisocyanate dispersion for waterborne two-component polyurethane systems.
Excellent compatibility with a broad range of waterborne polyols, including acrylics, polyesters, and polyethers.
Enables low-VOC, high-gloss, and durable coatings meeting stringent environmental regulations (e.g., EU Directive 2004/42/EC).
Offers fast ambient cure kinetics without requiring external catalysts or excessive heat.
Delivers superior chemical resistance, mar resistance, and UV stability in final cured films.
Architectural wall and ceiling coatings requiring low-emission, high-durability finishes.
Industrial maintenance coatings for metal substrates in food processing and pharmaceutical facilities.
Wood coatings for furniture and cabinetry where low odor and rapid handling are critical.
Automotive refinish clearcoats demanding excellent clarity, hardness, and weathering performance.
Plastic coatings for interior automotive parts and consumer electronics housings.
| Chemical Type | Aliphatic polyisocyanate (HDI-based) dispersion |
| Product Form | Waterborne liquid dispersion |
| Appearance | Clear to slightly hazy, colorless to pale yellow liquid |
| NCO Content (wt %) | 6.8 – 7.2 |
| pH (at 23 °C) | 7.0 – 8.0 |
| Viscosity (23 °C, mPa·s) | 150 – 300 (Brookfield DV2T, spindle #3, 12 rpm) |
| Solids Content (wt %) | 32 – 34 |
| Storage Stability | ≥ 6 months at 5–30 °C in sealed original container |
Q1: What is the primary chemical composition of Bayhydur XP 2451?
A: Bayhydur XP 2451 is an aliphatic polyisocyanate crosslinker based on hexamethylene diisocyanate (HDI) trimer chemistry, dispersed in water using a non-ionic stabilization system. It contains no organic solvents and is designed for use in high-performance waterborne two-component polyurethane systems.
Q2: Can Bayhydur XP 2451 be used with standard waterborne acrylic or polyester resins?
A: Yes — it is compatible with a broad range of waterborne hydroxyl-functional resins, including acrylics, polyesters, and hybrid dispersions. Optimal performance requires careful matching of resin OH value, particle size, and pH, and formulation adjustments may be needed to ensure colloidal stability and full cure development.
Q3: How does Bayhydur XP 2451 perform in terms of pot life and ambient curing?
A: It offers extended pot life compared to many solventborne HDI trimers — typically several hours at 23 °C and 50% relative humidity — due to its waterborne dispersion and controlled reactivity. Full film development and hardness build occur progressively at ambient conditions, with significant property development within 24–72 hours depending on film thickness and environmental conditions.
Q4: Is Bayhydur XP 2451 suitable for coatings requiring low VOC and regulatory compliance?
A: Yes — as a 100% solvent-free, water-dispersed polyisocyanate, it supports formulations that meet stringent global VOC regulations, including EU Paints Directive (2004/42/EC) and U.S. EPA architectural coating limits. Its use contributes to significantly reduced overall VOC content in finished two-component systems.
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
