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 PD 445
• Manufacturer: WEVO-CHEMIE GmbH
• Technologies: Two-component unfilled polyurethane with excellent chemical resistance and low dielectric constant
• Color: Yellowish or as requested
• Cure Type: Ambient temperature curing, final hardness in 10–14 days
• Package Size: 5 kg, 10 kg, 25 kg buckets and 180 kg drums
• Shelf Life: 6 monthsWEVO-Casting Resin PD 445 – Flexible polyurethane system for encapsulation and coating of sensitive electronic component
WEVO-Casting Resin PD 445 is a two-component, unfilled polyurethane encapsulating system designed for high flexibility and resilience. It offers outstanding resistance to acids and alkalis, excellent low-temperature flexibility, and strong adhesion to plastics, metals, and glass. Its stable dielectric constant across wide frequencies and temperatures makes it ideal for sensitive electronics. The operating temperature range is -60 °C to +120 °C. The resin is processed with WEVO-Hardener 385.
Encapsulation and coating of pressure-sensitive electronics.
Protection of sensors, PCBs, and SMD-equipped boards.
Ideal for components exposed to harsh chemicals and temperature fluctuations.
| Property | PD 445 (Unmixed) | Hardener 385 (Unmixed) | Mixed System |
|---|---|---|---|
| Appearance | Yellowish or as requested | Yellowish | Yellowish |
| Viscosity (22 °C) | 2,000–3,000 mPa·s | 15–35 mPa·s | 1,800–2,200 mPa·s |
| Density (22 °C) | 0.92–0.94 g/cm³ | 1.20–1.24 g/cm³ | – |
| Mixing Ratio (by weight) | 100 parts | 20 parts | – |
| Pot life (70 g, RT) | – | – | ~30 min |
| Curing time | – | – | 12–24 h at RT (final hardness 10–14 days) |
| Shore Hardness | – | – | 25–30 A |
| Tensile Strength | – | – | 1 N/mm² |
| Elongation at Break | – | – | 140 % |
| Modulus of Elasticity | – | – | 2 N/mm² |
| Thermal Conductivity | – | – | 0.2 W/m·K |
| Coefficient of Expansion | – | – | 80 ppm/K (below Tg), 220 ppm/K (above Tg) |
| Glass Transition Temp. | – | – | < -65 °C |
| Shrinkage | – | – | 0.2 % |
| Water Absorption | – | – | 0.6 % (30 days) |
| Dielectric Strength | – | – | 20 kV/mm |
| Volume Resistivity | – | – | > 4.2×10¹⁴ Ω·cm |
| Surface Resistivity | – | – | > 1×10¹⁶ Ω |
| Dielectric Constant ε | – | – | 3.0 (50 Hz, 23 °C) |
| Dissipation Factor tan δ | – | – | 0.014 (50 Hz, 23 °C) |
| Comparative Tracking Index | – | – | CTI 600 |
| Flammability | – | – | HB (UL94) |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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