Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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• Item Name: EPOCAST 36®
• Manufacturer: ITW Performance Polymers
• Technologies: Epoxy-based pourable chocking compound
• Color: Not specified
• Cure Type: Ambient temperature curing
• Package Size: 2.0 L and 4.0 L units (resin + hardener)
• Shelf Life: 18 months
EPOCAST 36® is a two-component, pourable chocking compound designed as a modern replacement for traditional steel chocks. It provides excellent physical performance when used for mounting heavy-duty marine and industrial equipment such as main and auxiliary engines, gearboxes, steering gears, thrust bearings, and stern tubes. The compound ensures secure load transfer, compensates uneven surfaces, and significantly reduces noise and vibrations.
Key Features & Benefits:
Lightweight, simple, and economical to use.
Chemical resistant with high compressive and impact strength.
Applicable up to 100 mm chock thickness.
Nearly 100% force transmission to the base.
Eliminates the need for machining of foundations.
Adjustable viscosity by pre-heating resin.
Proven noise (5–7 dB) and vibration reduction.
Service temperature: –100°C to +80°C (constant load).
Working temperature: 13°C to 50°C.
Shelf life: 18 months.
Mounting of main and auxiliary engines.
Installation of gearboxes, steering gears, and thrust bearings.
Alignment and support of stern tubes and marine propulsion systems.
Heavy machinery foundations requiring vibration/noise absorption.
| Property | Norm/Test Method | Unit | EPOCAST 36® Value | Special Test Conditions |
|---|---|---|---|---|
| Compressive Modulus of Elasticity | ASTM D 695 | N/mm² | 5610 | – |
| Compressive Yield Strength | ASTM D 695 | N/mm² | 131 | – |
| Compressive Strength | ASTM D 695 | N/mm² | 164 | –50°C: 196; +80°C: 123 |
| Compressive Strain at Rupture | ASTM D 695 | % | 11.8 | – |
| Tensile Strength at Break | ASTM D 695 | N/mm² | 49.4 | – |
| Elongation at Rupture | ASTM D 638 | % | 0.9 | – |
| Izod Impact | ASTM D 256-06a | J/cm | 0.211 | M4963/3 |
| Barcol Hardness | ASTM D 2583 | – | 55 | – |
| Thermal Expansion | – | K–1 | 31.0 ×10⁻⁶ (–50°C – 0°C); 43.8 ×10⁻⁶ (0–60°C) | – |
| Elastic Shear Modulus | – | N/mm² | 2360 | – |
| Logarithmic Decrement | DIN 53445 | – | 0.043 | – |
| Dielectric Strength | DIN 53481 | kV/mm | 18.8 | – |
| Insulation DC-Resistance | DIN 53482 | Ω·cm | 3.7 ×10¹⁵ | 100 V / 1000 V |
| Surface DC-Resistance | DIN 53482 | Ω | 5.3 ×10¹¹ / 1.3 ×10¹³ | 100 V / 1000 V |
| Friction Coefficient | – | – | 0.57 | Starting value |
| Flexural Strength | ASTM D 790 | N/mm² | 113 (–30°C), 95 (0°C), 99 (23°C), 82 (50°C), 81 (70°C), 53 (100°C) | – |
| Maximum Strain | ASTM D 790 | % | 1.6 (–30°C) → 3.1 (100°C) | – |
| Deformation Under Load | ASTM D 621 | % / mm | 0.02–0.32 / 0.003–0.040 | Varying loads & temperatures |
| Pulsating Compressive Test | – | N/mm² | 445–745 | Pulsation 6–7.5×10⁶ cycles, 10 Hz |
| Linear Shrinkage (cure) | ASTM D 2566 | cm/cm | 0.0015 | – |
| Pot Life | – | min | 30 (25°C); 10 (50°C) | – |
| Cure Time | – | h | 28–48 | Ambient 13–21°C |
| Flammability (self-supporting plastics) | ASTM D 635 | – | ATB: 160 s; AEB: 20 mm | – |
Electric Motor Reliability with Huntsman ARALDITE® Encapsulation Potting – Casting
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