CoolTherm™ EP-3500 Thermally Conductive Epoxy Encapsulant Contact Us to Buy
Product Information
LORD CoolTherm™ EP-3500 encapsulant is a two-component epoxy 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. CoolTherm EP-3500 encapsulant provides high-temperature stability combined with excellent electrical insulation.
Shelf Life
Shelf life of each component is six months from date of manufacture 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 if not mixed.
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 Appearance | Dark Gray Paste |
|
Mixed Viscosity, cps @ 60°C Shear rate 10/s |
11,700 |
| Mixed Specific Gravity, @ 25°C | 2.96 |
| Gel Time, min @ 110°C | 60 |
| Working Life, hr @ 60°C | >3 |
| Cure Time, hr @ 110°C | 2 |
Cured Typical Properties*
| Volume Resistivity, ohm-cm @ 25°C | 1 x 1014 |
| Thermal Conductivity, W/mK | 3.5 |
| Coefficient of Linear Thermal Expansion, ppm/°C | 10.4 |
| Glass Transition Temperature (Tg), °C | 206 |
| Hardness, Shore D | 90 |
| Young's Modulus, GPa | 20 |
| Dielectric Strength, V/mil | 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 |
|---|---|---|
 |
Technical Data Sheet | CoolTherm EP-3500 Thermally Conductive Epoxy Encapsulant |