• Item Name: ARALDITE® CW 1226-1 / ARADUR® HW 1226-1
• Manufacturer: Huntsman
• Technologies: Epoxy & Epoxy Derivatives, Composite Materials
• Color: Contact to Techniq VN for details.
• Cure Type: Heat Cure, Casting Resin
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
ARALDITE® CW 1226-1 / ARADUR® HW 1226-1 is a hot-curing epoxy casting resin system designed for electrical insulation. It offers high crack resistance, excellent long-term breakdown strength, and outstanding resistance to thermal shock. The system is suitable for conventional casting or automatic pressure gelation (APG) processes and is ideal for mechanically loaded components in medium- and high-voltage indoor electrical equipment.
Electrically insulating apparatus components and switchgear
Bushings and instrument transformers
Switches and relays
Mechanically loaded construction parts
Processing via conventional casting, pressure gelation, or APG
| Property | Before Mixed | After Mixed (Cured at 23°C → 6h at 80°C + 10h at 130°C) | Unit | Test Method |
|---|---|---|---|---|
| Tensile strength | – | 75–85 | N/mm² | ISO R 527 |
| Elongation at break | – | 1.2–1.7 | % | ISO R 527 |
| E modulus (tensile) | – | 9,600–10,100 | N/mm² | ISO R 527 |
| Flexural strength | – | 120–130 | N/mm² | ISO 178 |
| Surface strain | – | 1.5–2.0 | % | ISO 178 |
| Compressive strength | – | 140–150 | N/mm² | ISO 604 |
| Compression set | – | 6–7 | % | ISO 604 |
| Impact strength | – | 11–13 | kJ/m² | ISO 179 |
| Critical stress intensity factor (KIC) | – | 2.3–2.7 | MPa·m¹/₂ | Double Torsion Test |
| Specific energy at break (GIC) | – | 550–650 | J/m² | Double Torsion Test |
| Martens temperature | – | 90–100 | °C | DIN 53458 |
| Heat distortion temperature | – | 95–105 | °C | ISO 75 |
| Glass transition temperature | – | 90–105 | °C | IEC 1006, DSC |
| Coefficient of linear thermal expansion (20–60°C) | – | 36–40 | 10⁻⁶ K⁻¹ | DIN 53752 |
| Thermal conductivity | – | 0.8–0.9 | W/m·K | ISO 8894-1 |
| Water absorption, 10 days at 23°C | – | 0.10–0.20 | % by wt. | ISO 62 |
| Decomposition temperature | – | 350 | °C | DTA |
| Density (60% filler load) | – | 1.75–1.80 | g/cm³ | DIN 55990 |
| Electrical breakdown strength | – | 18–20 | kV/mm | IEC 60243-1 |
| HV arc resistance | – | 182–186 | s | ASTM D 495 |
| Tracking resistance | – | >600 | M-0.0 | IEC 112 |
| Electrolytic corrosion effect | – | A-1 | – | DIN 53489 |
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Techniq Vietnam provides end-to-end materials and process solutions, integrating world-class technologies in adhesives, soldering, and thermal management.
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