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High reactivity with standard amine and anhydride hardeners for rapid cure at ambient or elevated temperatures.
Excellent adhesion to metals, composites, and treated plastics without requiring primers.
Low viscosity (12,000–15,000 cP at 25°C) enabling easy processing via casting, impregnation, and filament winding.
Superior electrical insulation properties with high dielectric strength and volume resistivity.
Good chemical resistance to dilute acids, alkalis, and aliphatic solvents after full cure.
Electrical encapsulation of transformers, reactors, and high-voltage bushings.
Structural bonding in wind turbine blade assembly and automotive composite components.
Matrix resin for glass-fiber and carbon-fiber reinforced laminates in aerospace tooling.
High-performance potting and casting of industrial sensors and power electronics modules.
Insulating coatings for busbars, generator stators, and medium-voltage switchgear.
| Chemical Type | Bisphenol-A based liquid epoxy resin |
| Product Form | Clear to pale yellow viscous liquid |
| Appearance | Homogeneous, free from gels and suspended particles |
| Epoxy Equivalent Weight (EEW) | 185–195 g/eq |
| Viscosity (25°C) | 12,000–15,000 cP |
| Epoxide Content | 17.5–18.5 % by weight |
| Volatiles Content | < 0.3 % |
| Storage Stability | 12 months at < 25°C in unopened original containers |
Q1: What is the primary application of KD-420 in epoxy systems?
A: KD-420 is a liquid bisphenol-A based epoxy resin designed primarily as a reactive diluent and viscosity modifier in solvent-free or low-VOC epoxy formulations, especially for coatings, adhesives, and electrical encapsulation applications requiring improved flow and reduced processing viscosity.
Q2: How does KD-420 compare to standard DGEBA resins in terms of reactivity and cure profile?
A: KD-420 exhibits reactivity similar to conventional liquid DGEBA resins but offers lower initial viscosity and enhanced compatibility with common amine and anhydride hardeners. Its cure kinetics remain broadly aligned with standard epoxy systems, allowing integration into existing curing schedules without major reformulation.
Q3: Can KD-420 be used in food-contact or potable water applications?
A: KD-420 is not pre-qualified for direct food-contact or potable water applications. Formulators must conduct full regulatory evaluation—including migration testing and compliance verification—based on final cured system composition and intended use, as regulatory approval depends on the complete formulation and end-use conditions.
Q4: What are the recommended storage conditions to maintain product stability?
A: Store KD-420 in tightly sealed containers at temperatures between 15°C and 25°C, away from moisture, direct sunlight, and strong oxidizing agents. Prolonged exposure to elevated temperatures or humidity may affect viscosity and shelf life.
Q5: Is KD-420 compatible with common epoxy accelerators and modifiers?
A: Yes, KD-420 demonstrates good compatibility with typical epoxy accelerators (e.g., tertiary amines, imidazoles) and reactive/non-reactive modifiers such as flexibilizers and fillers, supporting broad formulation flexibility across industrial epoxy systems.
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E-mail: wangxingqiang@ericwchem.com
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