Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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LOCTITE® 620 is a high-viscosity, anaerobic acrylic adhesive designed for bonding cylindrical fitting parts. It cures in the absence of air between close-fitting metal surfaces, preventing loosening and leakage caused by shock and vibration. The product offers medium-to-high strength and excellent high-temperature resistance, making it suitable for retaining applications in extreme conditions.
| Property | Value |
|---|---|
| Chemical Type | Methacrylate Ester |
| Appearance | Green Liquid |
| Specific Gravity (@23°C) | 1.16 |
| Viscosity (Brookfield, 25°C) | 8,500 mPa·s (Spindle 5, 20 rpm) |
| Viscosity (EN 12092, 25°C) | 1,800 mPa·s (Shear rate 129 s⁻¹) |
| Cure Mechanism | Anaerobic, Secondary Cure with Activator |
| Property | Value |
|---|---|
| Coefficient of Thermal Expansion | 80×10⁻⁶ K⁻¹ |
| Thermal Conductivity | 0.1 W/(m·K) |
| Specific Heat | 0.3 kJ/(kg·K) |
| Elongation at Break (ISO 37) | <1% |
| Condition | Compressive Shear Strength (ISO 10123) |
|---|---|
| Cured 24 hrs @ 23°C | 17 N/mm² (2,500 psi) |
| Cured 24 hrs @ 23°C, then 24 hrs @ 177°C, tested @ 23°C | 24 N/mm² (3,500 psi) |
| Condition | Strength Retention (%) |
|---|---|
| Motor Oil (125°C, 1000 hrs) | 100 |
| Unleaded Petrol (22°C, 1000 hrs) | 95 |
| Brake Fluid (22°C, 1000 hrs) | 100 |
| Water/Glycol 50/50 (87°C, 1000 hrs) | 80 |
| Ethanol (22°C, 1000 hrs) | 75 |
| Acetone (22°C, 1000 hrs) | 95 |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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