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 570
• Manufacturer: WEVO-CHEMIE GmbH
• Technologies: Two-component polyurethane with nonabrasive mineral filler
• Color: Dark brown or as requested
• Cure Type: Ambient temperature curing, final hardness in 10–14 days
• Package Size: 5 kg, 10 kg, 30 kg buckets and 250 kg drums
• Shelf Life: 6 months
WEVO-Casting Resin PU 570 is a two-component polyurethane encapsulating system formulated with a non-abrasive mineral filler. Once cured, it demonstrates tough-elastic properties, good thermal endurance, enhanced thermal conductivity, and excellent stability in thermal cycling tests. The operating temperature range is -25 °C to +130 °C. It is processed with WEVO-Hardener 300.
Encapsulation of electrical components for low and medium-voltage applications.
Ideal where mechanical toughness, heat dissipation, and electrical insulation are required.
| Property | Casting Resin PU 570 (Unmixed) | Hardener 300 (Unmixed) | Mixed System |
|---|---|---|---|
| Appearance | Black or as requested | Dark brown | Black or as requested |
| Viscosity (22 °C) | 3500–4600 mPa·s | 70–120 mPa·s | 1500–2000 mPa·s |
| Density (22 °C) | 1.56–1.59 g/cm³ | 1.20–1.24 g/cm³ | – |
| Mixing Ratio (by weight) | 100 parts | 20 parts | – |
| Pot life (250 g, RT) | – | – | 30–50 min |
| Curing time | – | – | 12–24 h at RT (final hardness after 10–14 days) |
| Shore Hardness | – | – | 65–70 D |
| Tensile Strength | – | – | 6 N/mm² |
| Elongation at Break | – | – | 60 % |
| Thermal Conductivity | – | – | 0.56 W/m·K |
| Coefficient of Expansion | – | – | 72 ppm/K (below Tg), 170 ppm/K (above Tg) |
| Glass Transition Temp. | – | – | ~8 °C |
| Dielectric Strength | – | – | 28 kV/mm |
| Volume Resistivity | – | – | 1.4×10¹⁴ Ω·cm (RT) |
| Surface Resistivity | – | – | 1.5×10¹⁵ Ω (RT) |
| Dielectric Constant ε | – | – | 5.6 (50 Hz, 23 °C) |
| Dissipation Factor tan δ | – | – | 0.12 (50 Hz, 23 °C) |
| Thermal Class | – | – | Class B |
| Flammability | – | – | UL94 HB |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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