• Item Name: Araldite® CY 221 Resin / Aradur® HY 2966 Hardener
• Manufacturer: Huntsman Advanced Materials
• Technologies: Low-viscosity, unfilled epoxy casting resin with formulated polyamine hardener
• Color: Clear liquid (yellowish after cure)
• Cure Type: Room temperature or 4 h at RT + 4 h at 60°C
• Package Size: Contact to Techniq VN for details.
• Shelf Life: Contact to Techniq VN for details.
Araldite® CY 221 / Aradur® HY 2966 is a low-viscosity, unfilled epoxy casting resin system designed for room-temperature curing with high filler loading capacity. The system offers excellent heat resistance, chemical and atmospheric durability, and good crack resistance, making it suitable for applications requiring both electrical insulation and structural resilience. The product is UL 94 HB (6 mm) rated for flammability.
This system is recommended for encapsulation and potting of low-voltage and electronic components. It is processed using casting and vacuum casting methods, ensuring bubble-free results and reliable insulation for sensitive electrical assemblies.
| Property | Still Not Mixed (Resin / Hardener) | After Mixed (Cured System) |
|---|---|---|
| Viscosity at 25°C (mPa·s) | 355–475 / 300–600 | 490 |
| Specific Gravity (g/cm³) | 1.15 / 0.97 | — |
| Appearance | Clear liquid / Clear liquid | Transparent to light yellow |
| Mix Ratio (pbw) | Resin 100 / Hardener 25 | — |
| Pot Life at 25°C (min) | — | 117 |
| Gel Time at 25°C (min) | — | 120 |
| Curing Cycle | — | 24–48 h at RT or 4 h RT + 4 h at 60°C |
| Tensile Strength (MPa) | — | 8 |
| Elongation at Break (%) | — | 60 |
| Hardness (Shore D) | — | 25 |
| Glass Transition Temperature (°C) | — | 29 |
| Dielectric Strength (kV/mm) | — | 36 |
| Volume Resistivity (Ω·cm) | — | 10¹⁴ |
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