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 M
• Manufacturer: WEVO-CHEMIE GMBH
• Technologies: Two-component polyurethane system with non-abrasive mineral fillers
• Color: Dark brown or as requested
• Cure Type: Ambient temperature, 8–12 hours; final hardness 7 days at room temperature
• Package Size: 5 kg, 10 kg, 30 kg buckets; 250 kg drums
• Shelf Life: 6 months
WEVO-Casting Resin PU 7210 M is a two-component polyurethane encapsulating system with very low viscosity, formulated with non-abrasive mineral fillers. The cured polymer demonstrates tough mechanical properties and a high thermal distortion temperature. It is suitable for continuous use from -40°C to +145°C, with short-term exposure up to 150°C. The resin is processed with WEVO-Hardener 300, and both pot life and curing time can be accelerated upon request.
Encapsulation of electrical components for medium and high voltage applications.
Suitable for environments requiring high thermal resistance and mechanical strength.
Provides electrical insulation and dimensional stability for critical electronic components.
| Property | Still not mixed (Resin PU 7210 M / Hardener 300) | After mixed |
|---|---|---|
| Viscosity (22°C) | Resin: 8,500–11,500 mPa·s / Hardener: 70–120 mPa·s | 2,400–3,000 mPa·s |
| Density (22°C) | Resin: 1.68–1.70 g/cm³ / Hardener: 1.20–1.24 g/cm³ | ~1.20–1.24 g/cm³ |
| Mixing ratio (by weight) | 100 parts resin : 43 parts hardener | — |
| Pot life (250 g at RT) | — | ~20 min |
| Curing time | — | 8–12 h at RT; final hardness after 7 days |
| Color | Resin: dark brown / Hardener: black or per request | Dark brown to black |
| Hardness (Shore D) | — | 54 |
| Tensile strength | — | 85–90 N/mm² |
| Elongation at break | — | 2% |
| Thermal conductivity | — | 0.55 W/m·K |
| Coefficient of thermal expansion | — | 58–151 ppm/K |
| Glass transition temperature | — | <110°C / >120°C TMA |
| Volume resistivity | — | 14–17 Ω•cm |
| Dielectric strength | — | 33 kV/mm |
| Dielectric constant ε | — | 3.8 (50 Hz, 23°C) |
| Dissipation factor tan δ | — | 0.05 |
| Flammability classification | — | UL94 HB |
| CTI | — | 600 (IEC 60112) |
| Water absorption (30 days) | — | 0.3 % |
| Shrinkage after curing | — | 0.3 % |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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