CoolTherm® EP-3500 Epoxy System Contact Us to Buy
Product Information
CoolTherm® EP-3500 epoxy system is a two-component system designed for encapsulation of motor stators, transformer coils, and devices requiring a rigid, high thermal conductivity material with a low coefficient of thermal expansion. The epoxy system provides high-temperature stability combined with excellent electrical insulation.
Shelf Life
Shelf life of each component is nine months when stored at 25°C in original, unopened container. CoolTherm EP-3500 resin must be periodically rotated within its container to maintain maximum shelf life. Settling will occur. Product must be mixed as directed before use. To achieve properties and minimize hard-packed settling of fillers during storage, follow the general considerations and storage tips recommended in the Parker LORD Technical Tip – “Mixing of CoolTherm EP-3500 and EP-2000 Potting Materials”.
Features and Benefits
Superior Heat Dissipation – typically provides 30-50°C lower motor end winding temperatures during high-power operation.
Low Viscosity – provides low viscosity for a highly-filled material; self-levels to fill voids in motor stators/rotors, transformer coils and other electrical devices.
Durable– cured material resists cracking during multiple thermal cycles from sub-zero temperatures to 200°C.
Uncured Typical Properties*
| Mixed Viscosity, cP @ 60°C | 8000 |
| Mixed Specific Gravity | 2.98 |
| Working Life, hours @ 60°C | >3 |
| Cure Time |
Staged cure: 2 hours each @ 120°C, 150°C, 180°C & 210°C; or by using a slow heating ramp to 210°C |
Cured Typical Properties*
| Thermal Conductivity, W/m·K | 3.3 |
| Coefficient of Linear Thermal Expansion, ppm/°C | 10.4 |
| Glass Transition Temperature (Tg), °C | 206 |
| Hardness, Shore D | 90 |
| Storage Modulus, GPa | 20 |
| Volume Resistivity, ohm-cm @ 25°C | 1 x 1014 |
| Dielectric Strength, kV/mm (V/mil) | 15.4 (390) |
* Data is typical and not to be used for specification purposes.
Cure schedule of 2 hours each at 120°C, 150°C, 180°C and 210°C.
Literature
| Download | Type | Name | |
|---|---|---|---|
| Safety Data Sheet | COOLTHERM EP-3500 RESIN | |
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| Safety Data Sheet | COOLTHERM EP-3500 HARDENER | |
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Technical Data Sheet | CoolTherm EP-3500 Epoxy Resin | |
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Product Brochure/Bulletin/Sell Sheet | Thermal Management Materials for the Oil & Gas Industry | |
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Technical Tip | Mixing of CoolTherm EP-3500 and EP-2000 Thermally Conductive Epoxy Potting Materials Technical Tip |