Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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• Item Name: WEVO-Casting Resin PU 7210 FL
• Manufacturer: WEVO-CHEMIE GmbH
• Technologies: Two-component polyurethane encapsulating system with mineral filler, halogen-free, self-extinguishing
• Color: Black or as requested
• Cure Type: Room temperature curing, final hardness in 10–14 days (can be accelerated)
• Package Size: 5 kg, 10 kg, 30 kg buckets; 250 kg drums
• Shelf Life: 6 months
WEVO-Casting Resin PU 7210 FL is a two-component polyurethane encapsulating system formulated with mineral fillers to ensure self-extinguishing behavior and flame resistance (UL94 V-0 at 6 mm). It is halogen-free, passes HWI, HAI, and CTI tests with PLC 0, and exhibits a high thermal distortion temperature. The cured polymer provides toughness, strong dielectric properties, and reliable long-term thermal stability. The operational temperature range is -40 °C to +145 °C, with short-term resistance up to 150 °C.
Encapsulation of electrical components, especially for medium and high-voltage systems.
Suitable for applications requiring flame retardancy, high dielectric strength, and stable mechanical performance under thermal stress.
Effective for use in harsh environments where resistance to heat, moisture, and tracking is critical.
| Property | Casting Resin PU 7210 FL (Unmixed) | Hardener 507 (Unmixed) | Mixed System |
|---|---|---|---|
| Appearance | Brown / Black (customizable) | – | Black or as requested |
| Viscosity (22 °C) | 7000–8500 mPa·s | 15–40 mPa·s | 400–600 mPa·s |
| Density (22 °C) | 1.53–1.57 g/cm³ | 1.20–1.24 g/cm³ | – |
| Mixing Ratio (by weight) | 100 parts | 43 parts | – |
| Pot life (300 g, RT) | – | – | 20–35 min |
| Curing time | – | – | 12–24 h at RT (final cure 10–14 days) |
| Shore Hardness D | – | – | 85–90 |
| Tensile Strength | – | – | 60 N/mm² |
| Elongation at Break | – | – | 10 % |
| Thermal Conductivity | – | – | 0.65 W/m·K |
| Coefficient of Expansion | – | – | 58–151 ppm/K |
| Dielectric Strength | – | – | 28 kV/mm |
| Surface/Volume Resistance | – | – | 10¹⁵ Ω / 10¹⁴ Ω·cm |
| Thermal Class | – | – | Class B, Tg > 120 °C |
| Flammability | – | – | UL94 V-0 (6 mm), GWFI 960 °C |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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