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Enhanced pot life compared to standard cycloaliphatic amines, enabling extended processing window for large-scale casting and laminating.
Low exotherm profile ensures reduced thermal stress and minimized risk of cracking in thick-section epoxy formulations.
Excellent adhesion to diverse substrates including metals, composites, and concrete without primer requirement.
Improved moisture tolerance during cure, supporting reliable performance under ambient humidity conditions (up to 80% RH).
Non-blushing formulation prevents surface haze or amine carbamate formation in high-humidity environments.
High-performance epoxy flooring systems for industrial and pharmaceutical cleanrooms.
Electrical insulation castings for transformers, bushings, and encapsulated power electronics.
Structural adhesive formulations requiring low shrinkage and high Tg after cure.
Wind turbine blade bonding and composite repair matrices.
Marine-grade protective coatings and underwater repair compounds.
| Chemical Type | Modified cycloaliphatic amine |
| Product Form | Liquid |
| Appearance | Pale yellow to amber clear liquid |
| Primary Applications | Epoxy resin curing agent for high-performance coatings, adhesives, and composites |
| Key Features | Low volatility, non-sensitizing, low-odor |
| Benefits | Improved worker safety, reduced VOC emissions, consistent cure at ambient temperatures |
| Storage Stability | 12 months in original sealed container at 20–25°C |
| Compatibility | Compatible with standard DGEBA and novolac epoxy resins |
Q1: What are the key advantages of WK-4028 compared to conventional aliphatic or aromatic amine curing agents?
A: WK-4028 offers an optimized balance of low viscosity, reduced volatility, and improved compatibility with epoxy resins—enabling easier handling and longer pot life than many standard aliphatic amines, while delivering enhanced thermal stability and reduced yellowing tendency versus aromatic systems.
Q2: Is WK-4028 suitable for applications requiring low-temperature cure performance?
A: Yes—WK-4028 is formulated to support efficient curing at ambient to moderately elevated temperatures (e.g., 15–40 °C), making it well-suited for coatings, adhesives, and composites where heat input is limited or undesirable.
Q3: How does WK-4028 perform in terms of moisture resistance and compatibility with humid environments during application?
A: As a modified cycloaliphatic amine, WK-4028 exhibits lower sensitivity to ambient moisture compared to highly reactive primary aliphatic amines, supporting more robust processing in typical industrial environments—though proper substrate preparation and controlled humidity remain recommended for optimal film formation.
Q4: Can WK-4028 be used in food-contact or potable water-related epoxy systems?
A: WK-4028 is not pre-qualified for direct food-contact or potable water applications. Formulators must conduct full regulatory evaluation—including extraction testing and compliance verification against applicable regional requirements—before considering use in such sensitive end uses.
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