Item Name: ARALDITE® MY 740 / ARADUR® HY 906 / ACCELERATOR DY 070
Manufacturer: Huntsman
Technologies: Epoxy & epoxy derivatives for composite materials
Color: Resin – Colorless to pale yellow, Hardener – Light amber, Accelerator – Transparent
Cure Type: Heat cure
Package Size: Contact to Techniq VN for details.
Shelf Life: Contact to Techniq VN for details.
ARALDITE® MY 740 / ARADUR® HY 906 / ACCELERATOR DY 070 is a hot-curing, low-viscosity epoxy-based impregnating resin system. It is designed for composite insulator rods, tubes, and bushings, providing excellent dielectric properties, good mechanical strength, high glass transition temperature, improved aging resistance, and easy processing via filament winding, pultrusion, wet lamination, and general impregnation methods.
Impregnation of high-voltage bushings, coils, rods, and insulators
Manufacturing of composite insulator rods and tubes
Electrical laminates and power transmission components
Filament winding, pultrusion, wet laminating processes
| Property | Before Mixing | After Mixing / Cured |
|---|---|---|
| Viscosity (mPa·s) | 10,000 – 14,500 (Resin) | – |
| Viscosity (mPa·s) | 175 – 350 (Hardener) | – |
| Viscosity (mPa·s) | <50 (Accelerator) | – |
| Density (g/cm³) | 1.15 – 1.20 (Resin) | – |
| Density (g/cm³) | 1.20 – 1.25 (Hardener) | – |
| Density (g/cm³) | 0.95 – 1.05 (Accelerator) | – |
| Tensile strength (MPa) | – | 75 – 85 |
| Elongation at break (%) | – | 3.5 – 4.5 |
| Tensile modulus (MPa) | – | 3,000 – 4,000 |
| Flexural strength at 23°C (MPa) | – | 140 – 150 |
| Flexural elongation (%) | – | 5.5 – 6.5 |
| Flexural modulus (MPa) | – | 2,500 – 3,500 |
| Critical stress intensity factor (K1C, MPa·m¹/₂) | – | 0.5 – 0.7 |
| Specific energy at break (G1C, J/m²) | – | 70 – 100 |
| Glass transition temperature (°C) | – | 165 – 175 |
| Coefficient of linear thermal expansion (10⁻⁶/K) | – | 65 – 70 |
| Thermal conductivity (W/m·K) | – | 0.15 – 0.20 |
| Water absorption, 10d/23°C (%) | – | 0.50 – 0.60 |
| Water absorption, 60min/100°C (%) | – | 0.20 – 0.25 |
| Decomposition temperature (°C) | – | 350 |
| Breakdown strength (kV/mm) | – | 22 – 26 |
| HV arc resistance (s) | – | 70 – 80 |
| Tracking resistance (CTI) | – | > 600 |
Standard Cure Cycle: 30 min at 110°C + 30 min at 170°C + 30 min at 200°C
Mix Ratios (W%): Hardener : Resin = 0.95, Accelerator : Resin = 0.012
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