Solvent Free Epoxy Curing Agent DH-3239 Hardener
Developed for electronic potting and encapsulation, DH-3239 is a fully solid, solvent-free cycloaliphatic amine hardener. Its low viscosity lets the compound flow into tightly wound coils and narrow component gaps, while balanced reactivity keeps exotherm under control during cure. Finished castings deliver stable electrical insulation and reliable thermal performance.
Product Specifications
| Property | Unit | Value |
|---|
| Model | - | DH-3239 |
| Color | - | Gardner color; ≤2 |
| Appearance | - | Colorless |
| Viscosit | mPa﹥s (25℃) | 300-500 |
| Amine Value | mg KOH/g | 270-290 |
| AHEW | g/mol | 98 |
| PHR | EEW ~ 190 g/eq | 100:50 |
| Density | g/cm3 (25℃) | 0.98 |
| Packing | - | 200kg drum |
Typical Performance
| Pot life (LER EEW~190) 100g | 25℃ | 30-50min |
| Phase II/III with 200μ wet film thickness | 25℃ | 3-4 hours |
| Phase II/III with 200μ wet film thickness | 25℃ | 18-24 hours |
| Phase II/III with 800μ wet film thickness | 25℃ | 4-5 hours |
| Phase II/III with 800μ wet film thickness | 25℃ | 24-32 hours |
Key Applications
- Electronic component potting
- Transformer and coil encapsulation
- Insulation sealants for PCB assemblies
- Cast epoxy parts and bushings
Product Characteristics
- 100% solid formulation with no solvents
- Deep penetration into dense coil windings
- Controlled exotherm for safe casting
- Stable insulation in electrical service
- Thermally and dimensionally stable parts
Product Gallery
Frequently Asked Questions
Does DH-3239 cause amine blushing or water spotting?
The modified cycloaliphatic structure of DH-3239 prevents amine exudation and water spotting, so the coating surface remains clean and uniform after cure.
What is the shelf life and how should DH-3239 be stored?
Sealed in its original container at 0-35℃, DH-3239 keeps for 24 months. Keep drums tightly closed and away from direct sunlight and moisture.
What packaging options are available for DH-3239?
The standard package is a 200kg drum. We also support flexible packaging configurations for bulk purchasing and export shipment.
Is DH-3239 free of nonyl phenol?
Yes, DH-3239 is a nonyl phenol free formulation, meeting modern environmental and safety requirements for coating raw materials.
What curing schedule is needed to reach full performance?
Full properties develop after roughly 7 days at 25℃. Post-curing at 60-80℃ for several hours can speed up the process when faster turnaround is required.
Which substrates can DH-3239 epoxy systems bond to?
DH-3239 systems bond firmly to concrete, cement mortar, steel, aluminum and most prepared industrial substrates, provided the surface is clean, dry and properly primed.
