Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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LOCTITE® HHD 3542™ is a reactive polyurethane hot melt adhesive designed for robotic dispensing. It provides a long open time, good initial strength after solidification, and structural durability through secondary moisture cure. The fully cured adhesive does not remelt.
| Property | Value |
|---|---|
| Specific Gravity (25°C) | 1.1 |
| Viscosity @ 100°C (mPa.s) | 3,500 – 7,500 |
| Open Time @ 25°C (1mm bead) | < 4 min |
| Application Temperature (°C) | 90 – 110 |
| Property | Value |
|---|---|
| Glass Transition Temperature (°C) | -39 |
| Coefficient of Thermal Expansion (Pre Tg) | 130 x 10⁻⁶ K⁻¹ |
| Coefficient of Thermal Expansion (Post Tg) | 340 x 10⁻⁶ K⁻¹ |
| Hardness (Shore D) | 30 |
| Thermal Conductivity (W/m.K) | 0.21 |
| Elongation at Break (%) | 860 |
| Tensile Modulus (N/mm²) | 91 (13,225 psi) |
| Tensile Strength (N/mm²) | > 8 (> 1,225 psi) |
| Property | Value |
|---|---|
| Dielectric Constant @ 1,000 kHz | 3.48 |
| Substrate | Strength (N/mm²) | Strength (psi) |
|---|---|---|
| Aluminum (anodized) | 7.2 | 1,045 |
| PC/ABS | 4.8 | 695 |
| Substrate | Strength (N/mm²) | Strength (psi) |
|---|---|---|
| Aluminum (anodized) | 4.8 | 695 |
| PC/ABS | 5.8 | 840 |
| Test Condition | Strength (N/mm²) | Strength (psi) |
|---|---|---|
| 7 days @ 85°C / 85% RH | 3.9 | 570 |
| After Thermal Cycling (27 cycles) | 7.2 | 1,040 |
| After Heat Shock (20 cycles) | 6.0 | 865 |
| Test Condition | Strength (N/mm²) | Strength (psi) |
|---|---|---|
| 7 days @ 85°C / 85% RH | 4.5 | 800 |
| After Thermal Cycling | 6.4 | 935 |
| After Heat Shock | 5.3 | 775 |
| Environment | Temperature (°C) | 500 h | 1000 h |
|---|---|---|---|
| Air | 87 | 150 | 150 |
| Motor Oil | 87 | 115 | 110 |
| Isopropanol | 22 | 90 | 85 |
| Water | 22 | 115 | 150 |
| Water/Glycol | 87 | 130 | 140 |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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