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Low-viscosity liquid formulation enables easy handling and uniform mixing with epoxy resins.
Room-temperature curing capability with rapid gelation and full cure within 24–48 hours.
Excellent chemical resistance to alkalis, solvents, and mild acids after full cure.
Low exotherm profile minimizes internal stress and reduces risk of cracking in thick-section castings.
Halogen-free composition supports compliance with RoHS and REACH regulatory requirements.
Electrical potting and encapsulation for transformers, sensors, and PCB modules.
Structural adhesives in automotive composite bonding and lightweight assembly.
High-performance flooring and grouting systems for industrial facilities.
Wind turbine blade bonding and repair formulations requiring low-temperature operability.
Marine coatings and corrosion-resistant linings for offshore infrastructure.
| Chemical Type | Aliphatic polyamine adduct |
| Product Form | Clear to pale yellow liquid |
| Appearance | Homogeneous, free from sediment or haze |
| Viscosity (25°C) | 350–550 mPa·s |
| Density (25°C) | 0.96–0.99 g/cm³ |
| Amine Value | 280–320 mg KOH/g |
| Primary Applications | Epoxy resin curing for electrical, structural, and protective applications |
| Key Features | Room-temperature cure, low exotherm, halogen-free, solvent-free |
Q1: What is HDX-70L Curing Agent primarily used for?
A: HDX-70L is a specialty amine-based curing agent designed for epoxy resin systems requiring low-temperature reactivity, extended pot life, and excellent adhesion to challenging substrates such as metals, composites, and treated plastics.
Q2: How does HDX-70L compare to conventional aliphatic amines in terms of handling and safety?
A: HDX-70L exhibits lower volatility and reduced skin sensitization potential compared to many standard aliphatic amines. It has a milder odor profile and is formulated to support safer industrial handling—though appropriate PPE and ventilation remain essential during use.
Q3: What is the typical dosage range for HDX-70L in epoxy formulations?
A: Dosage depends on the specific epoxy resin, desired cure profile, and end-use requirements. HDX-70L is typically used at low concentrations—generally ranging from 0.1% to 2% by weight relative to the epoxy resin—and often functions effectively as a co-catalyst or accelerator rather than a primary hardener.
Q4: Can HDX-70L be used in moisture-sensitive or high-humidity applications?
A: Yes—HDX-70L demonstrates good tolerance to ambient moisture and is frequently selected for formulations where consistent cure performance is needed under variable humidity conditions, including certain coating and adhesive applications applied outdoors or in uncontrolled environments.
Q5: Is HDX-70L compatible with common epoxy resins and modifiers?
A: HDX-70L shows broad compatibility with standard liquid and solid bisphenol-A/F epoxies, novolac epoxies, and many reactive diluents or flexibilizers. Compatibility testing under actual processing conditions is recommended to confirm performance in complex multi-component systems.
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