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High-performance aliphatic polyisocyanate crosslinker specifically engineered for waterborne hydroxyl-functional resins.
Excellent compatibility with acrylic, polyester, and hybrid waterborne polyols—enabling low-VOC, high-gloss coatings.
Fast ambient-cure kinetics with good pot life balance, supporting efficient industrial coating processes.
Outstanding weather resistance, UV stability, and gloss retention in demanding exterior applications.
REACH-compliant formulation with no added tin catalysts or hazardous air pollutants (HAPs).
Architectural and industrial maintenance coatings for metal and concrete substrates.
Automotive OEM and refinish clearcoats requiring high clarity and scratch resistance.
Wood coatings for furniture and flooring where low emissions and rapid handling are critical.
Plastic coatings for automotive interior parts and consumer electronics housings.
Can and coil coatings targeting sustainable, high-throughput metal packaging solutions.
| Chemical Type | Aliphatic polyisocyanate (HDI-based trimer) |
| Product Form | Water-dispersible liquid |
| Appearance | Clear to slightly hazy, colorless to pale yellow dispersion |
| NCO Content (wt %) | 8.0 – 8.8% |
| pH (25 °C) | 7.0 – 8.5 |
| Solids Content (wt %) | 48 – 52% |
| Viscosity (mPa·s, 25 °C) | 150 – 400 |
| Primary Applications | Waterborne 2K PU topcoats for industrial, automotive, and wood segments |
Q1: What is the primary chemical composition of Bayhydur XP 7165?
A: Bayhydur XP 7165 is a water-dispersible aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) trimer chemistry, modified with hydrophilic groups to enable stable dispersion in aqueous systems without organic solvents or added surfactants.
Q2: Can Bayhydur XP 7165 be used in ambient-cure coatings?
A: Yes — it is specifically designed for ambient- and low-bake curing applications in waterborne two-component polyurethane systems, delivering good pot life and film formation at room temperature while enabling improved hardness and chemical resistance after full cure.
Q3: How does Bayhydur XP 7165 differ from solvent-based HDI trimers?
A: Unlike conventional solvent-based HDI trimers, Bayhydur XP 7165 is pre-dispersed in water with built-in hydrophilic stabilization, eliminating the need for co-solvents or external emulsifiers. This supports lower VOC formulations and simplifies handling in waterborne production environments.
Q4: Is Bayhydur XP 7165 compatible with common waterborne acrylic and polyester polyols?
A: Yes — it demonstrates broad compatibility with a wide range of commercially available anionic and nonionic waterborne polyols, including acrylic, polyester, and polyether types, though optimal performance requires formulation-specific adjustment of pH, coalescent aids, and mixing protocols.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
