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Enhanced thermal stability for high-performance epoxy systems operating up to 180 °C continuous service.
Low viscosity (250–400 mPa·s at 25 °C) enabling excellent processability and improved filler wetting.
Reduced exotherm during cure, minimizing internal stress and improving dimensional stability in thick-section castings.
Good compatibility with standard bisphenol-A and novolac epoxy resins without phase separation.
Low volatility and negligible amine odor, supporting safer handling and reduced VOC emissions.
High-voltage electrical insulation systems, including transformer potting and bushing encapsulation.
Structural composites for aerospace tooling and wind turbine blade bonding adhesives.
Industrial flooring and heavy-duty coating systems requiring chemical resistance and thermal durability.
Underwater and offshore protective coatings for steel substrates exposed to saline environments.
Electronics encapsulants for power modules and LED packaging demanding low shrinkage and high Tg.
| Chemical Type | Modified cycloaliphatic amine |
| Product Form | Liquid |
| Appearance | Pale yellow to light amber clear liquid |
| Primary Applications | Epoxy resin curing agent for high-performance coatings, encapsulants, and composites |
| Key Features | Low viscosity, low exotherm, high Tg capability, thermal stability |
| Benefits | Improved processing safety, enhanced mechanical retention at elevated temperatures, reduced cracking risk |
| Storage Stability | ≥12 months at 15–25 °C in sealed original container |
| Recommended Cure Schedule | 2–4 hours at 80–120 °C (post-cure optional for maximum performance) |
Q1: What are the key advantages of WK-6895 compared to conventional aliphatic or aromatic amine curing agents?
A: WK-6895 combines the low viscosity and fast reactivity of aliphatic amines with enhanced chemical resistance, reduced volatility, and improved yellowing resistance typical of cycloaliphatic structures. Its modified structure also contributes to better compatibility with epoxy resins and lower exotherm during cure, supporting safer processing in thick-section or heat-sensitive applications.
Q2: Is WK-6895 suitable for high-performance coating systems requiring UV stability and gloss retention?
A: Yes — due to its saturated cycloaliphatic backbone and structural modification, WK-6895 exhibits significantly improved resistance to UV-induced degradation and discoloration compared to standard aliphatic amines. It is commonly selected for topcoats, clear finishes, and outdoor protective coatings where long-term gloss and color stability are critical.
Q3: How does WK-6895 perform in terms of pot life and cure speed at ambient temperature?
A: WK-6895 offers a balanced profile: it provides a practical pot life (typically several hours) when mixed with standard DGEBA epoxy resins at room temperature, while still enabling full cure within 24–48 hours. Cure kinetics can be adjusted via formulation — e.g., co-catalysts or elevated temperature — without compromising final properties.
Q4: Can WK-6895 be used in formulations intended for food-contact or potable water applications?
A: WK-6895 is not pre-approved for direct food-contact or potable water applications. Formulators must conduct full regulatory evaluation—including extractables testing and compliance verification against applicable regional frameworks—before use in such systems. It is recommended for industrial, protective, and decorative applications where regulatory endpoints are well-defined and achievable through full system qualification.
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E-mail: wangxingqiang@ericwchem.com
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