Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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HumiSeal® 2A53 is a two-component epoxy conformal coating designed for protecting printed circuit boards (PCBs) in environments requiring exceptional resistance to solvents and chemicals. It meets MIL-I-46058C and IPC-CC-830 standards and is RoHS compliant. The coating fluoresces under UV light for inspection and offers self-extinguishing flammability properties.
| Property | Part A | Part B | Mixed |
|---|---|---|---|
| Density (ASTM D1475) | – | – | 0.93 ± 0.03 g/cm³ |
| Solids Content (Fed-Std-141, Meth. 4044) | – | – | 54 ± 5 % |
| Viscosity (Fed-Std-141, Meth. 4287) | – | – | 350 ± 150 cP |
| VOC | – | – | 455 g/L |
| Recommended Coating Thickness | – | – | 25 – 75 microns |
| Drying Time to Handle (Fed-Std-141, Meth. 4061) | – | – | 5 hours |
| Time to Reach Optimum Properties | – | – | 7 days (or 2 hours at 93°C) |
| Pot Life at Room Temperature | – | – | 24 hours |
| Shelf Life at Room Temperature | – | – | 12 months |
| Thermal Shock Resistance (MIL-I-46058C) | – | – | -65°C to 125°C |
| Coefficient of Thermal Expansion (TMA) | – | – | 56 ppm/°C |
| Glass Transition Temperature (DSC) | – | – | 19°C |
| Modulus (DMA) | – | – | 32.2 MPa |
| Flammability (MIL-I-46058C) | – | – | Self-Extinguishing |
| Dielectric Withstand Voltage (MIL-I-46058C) | – | – | >1500 volts |
| Dielectric Breakdown Voltage (ASTM D149) | – | – | 8000 volts |
| Dielectric Constant (ASTM D150-98, 1MHz, 25°C) | – | – | 3.0 |
| Dissipation Factor (ASTM D150-98, 1MHz, 25°C) | – | – | 0.03 |
| Insulation Resistance (MIL-I-46058C) | – | – | 2.0 x 10¹⁴ ohms (200TΩ) |
| Moisture Insulation Resistance (MIL-I-46058C) | – | – | 2.8 x 10¹⁰ ohms (28GΩ) |
| Fungus Resistance (ASTM G21) | – | – | Passes |
| Resistance to Chemicals | – | – | Excellent |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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