High Strength Epoxy Curing Agent DH-3239 Hardener
Structural and load-bearing epoxy work demands strong mechanical properties, and DH-3239 delivers them through a highly cross-linked network. Tensile, compressive and flexural performance are all strong, with firm adhesion to prepared substrates — which is why engineers specify it for grouts, anchoring systems and structural repairs.
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
- Epoxy structural grouts
- Anchor and dowel systems
- Concrete crack repair compounds
- Load transfer joint fillers
Product Characteristics
- High tensile and compressive values
- Firm adhesion to concrete and steel
- Low shrinkage on cure
- Good fatigue resistance in service
- Dependable structural performance
Product Gallery
Frequently Asked Questions
What is the recommended mixing ratio of DH-3239 with epoxy resin?
The recommended ratio is 100 parts liquid epoxy resin to 50 parts DH-3239 by weight when the resin EEW is about 190 g/eq. Adjust proportionally for resins with different epoxy equivalent weights.
How long is the pot life of DH-3239 at 25℃?
The usable time of a 100g mix is around 30-50 minutes at 25℃. For large-area projects, prepare material in smaller batches to stay within the open time.
Can DH-3239 be used in self-leveling floor coating systems?
Yes. Its viscosity of 300-500 mPa﹥s allows excellent flow and leveling, producing smooth, bubble-free surfaces in self-leveling epoxy floors. It is one of the most common uses of this hardener.
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.
