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Highly latent at room temperature—enables extended pot life and ambient storage stability.
Activates rapidly upon heating (typically >100°C), delivering efficient epoxy resin curing without external catalysts.
Halogen-free formulation, supporting environmentally responsible manufacturing and regulatory compliance (e.g., RoHS, REACH).
Excellent compatibility with standard bisphenol-A and novolac epoxy resins.
Yields cured networks with high glass transition temperature (Tg) and superior mechanical strength.
Prepreg systems for aerospace and high-performance composites.
Electrically insulating encapsulants and potting compounds in power electronics.
Thermosetting adhesives for automotive structural bonding.
UV/heat dual-cure coatings requiring delayed thermal activation.
Printed circuit board (PCB) laminates and dielectric films.
| Chemical Type | Latent imidazole derivative |
| Product Form | Powder |
| Appearance | White to off-white free-flowing powder |
| Primary Applications | Epoxy resin curing agent for high-reliability thermosets |
| Key Features | Room-temperature stability, heat-activated latency, halogen-free |
| Recommended Cure Schedule | 150°C for 60 minutes (typical) |
| Storage Conditions | Store sealed under dry conditions at 5–30°C |
| Shelf Life | 12 months from date of manufacture when stored properly |
Q1: What is the primary function of EH-15LS in epoxy systems?
A: EH-15LS is a latent amine-based curing agent designed to provide extended pot life at ambient temperatures while enabling rapid and efficient cure upon thermal activation—typically above 120 °C. It is especially valued for one-component (1K) epoxy formulations requiring storage stability and controlled processing.
Q2: How does EH-15LS compare to conventional aromatic amine hardeners in terms of handling and safety?
A: Unlike many reactive aromatic amines, EH-15LS exhibits significantly lower volatility and reduced skin sensitization potential due to its chemically masked, low-activity structure at room temperature. This enhances workplace safety and simplifies handling during compounding and storage.
Q3: What types of epoxy resins is EH-15LS compatible with?
A: EH-15LS demonstrates broad compatibility with standard diglycidyl ether of bisphenol-A (DGEBA) and bisphenol-F (DGEBF) resins, as well as many novolac and cycloaliphatic epoxies. Compatibility should be verified experimentally for specialty or highly functionalized resins.
Q4: Is EH-15LS suitable for applications requiring electrical insulation properties?
A: Yes—formulations cured with EH-15LS typically yield crosslinked networks with excellent dielectric strength, low dissipation factor, and stable insulation resistance after full thermal cure, making it well-suited for encapsulants, potting compounds, and insulating coatings in electronics.
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