Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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LOCTITE® EA M-21HP™ is a high-performance two-part epoxy adhesive that cures at room temperature to form a tough, off-white bondline. It provides high shear strength, high peel resistance, and excellent electrical insulation. The adhesive is resistant to a wide range of chemicals and solvents and is suitable for bonding glass, plastics, and metals. It is also approved for use in disposable medical devices and meets ISO-10993 biocompatibility standards.
| Property | Resin | Hardener | Mixed |
|---|---|---|---|
| Specific Gravity (@ 25°C) | 1.0 | 1.1 | 1.03 |
| Viscosity (mPa·s) | 65,000 (Spindle 7, 20 rpm) | 7,000 (Spindle 6, 50 rpm) | – |
| Property | Value |
| Gel Time (@ 22°C) | 10 – 25 minutes |
| Working Life | 20 minutes |
| Tack Free Time | 40 minutes |
| Full Cure | 24 hours @ 25°C (faster with heat up to 93°C) |
| Property | Value |
| Glass Transition Temperature (Tg) | 60°C |
| Elongation | 8% |
| Tensile Strength | 39 N/mm² (5,700 psi) |
| Shore Hardness (Durometer D) | 74 – 84 |
| Dielectric Breakdown Strength | 20 kV/mm |
| Substrate | Strength (N/mm²) | Strength (psi) |
| Steel (grit blasted) | 22.6 | 3,270 |
| Aluminum (etched & abraded) | 28.2 | 4,090 |
| Aluminum (Anodized) | 17.4 | 2,530 |
| Stainless Steel | 22.0 | 3,190 |
| Polycarbonate | 3.9 | 560 |
| Nylon | 1.8 | 260 |
| Wood (Fir) | 11.4 | 1,660 |
| PVC | 7.9 | 1,140 |
| ABS | 10.4 | 1,510 |
| Epoxyglass | 28.6 | 4,140 |
| Acrylic | 2.0 | 290 |
| Glass | 32.3 | 4,690 |
| Environment | Temperature (°C) | 500h | 1000h |
| Air | 87 | – | 135% |
| Motor oil (10W30) | 87 | 160% | 170% |
| Unleaded gasoline | 87 | 105% | 80% |
| Water/glycol 50/50 | 87 | 120% | 125% |
| Salt fog | 22 | – | 70% |
| 95% RH | 38 | – | 100% |
| Condensing Humidity | 49 | – | 90% |
| Water | 22 | – | 80% |
| Acetone | 22 | 75% | 95% |
| Isopropanol | 22 | 85% | 125% |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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