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Chemically Resistant adhesives

Lord Adhesives CoolTherm™ EP-3500 Thermally Conductive Epoxy Encapsulant
Categories: Polymer; Thermoset; Epoxy; Epoxy, Thermally Conductive

Material Notes: 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.

Features: typically provides 30-50°C lower motor end winding temperatures during high-power operation. provides low viscosity for a highly-filled material; self-levels to fill voids in motor stators/rotors, transformer coils and other electrical devices. cured material resists cracking during multiple thermal cycles from sub-zero temperatures to 200°C.

All information provided by Lord.

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Physical PropertiesMetricEnglishComments
Specific Gravity  2.94 g/cc
@Temperature 25.0 °C
2.94 g/cc
@Temperature 77.0 °F
EP-3500 Resin
 2.96 g/cc
@Temperature 25.0 °C
2.96 g/cc
@Temperature 77.0 °F
Mixed
 2.98 g/cc
@Temperature 25.0 °C
2.98 g/cc
@Temperature 77.0 °F
EP-3500 Hardener
Viscosity  7500 cP
@Temperature 60.0 °C
7500 cP
@Temperature 140 °F
EP-3500 Hardener, 10s^-1 Shear Rate
 11700 cP
@Temperature 60.0 °C
11700 cP
@Temperature 140 °F
mixed, 10s^-1 Shear Rate
 12000 cP
@Temperature 60.0 °C
12000 cP
@Temperature 140 °F
EP-3500 Resin, 10s^-1 Shear Rate
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 9090ASTM D 2240
Modulus of Elasticity 20.0 GPa2900 ksiby DMA
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+14 ohm-cm
@Temperature 25.0 °C
1.00e+14 ohm-cm
@Temperature 77.0 °F
cured; ASTM D 257
Dielectric Strength 15.4 kV/mm390 kV/inASTM D 149
 
Thermal PropertiesMetricEnglishComments
CTE, linear 10.4 µm/m-°C5.78 µin/in-°F
Thermal Conductivity 3.50 W/m-K24.3 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 200 °C392 °F
Glass Transition Temp, Tg 206 °C403 °Fby TMA
 
Processing PropertiesMetricEnglishComments
Working Life >= 180 min
@Temperature 60.0 °C
>= 180 min
@Temperature 140 °F
Mixed
Gel Time 60.0 min
@Temperature 110 °C
60.0 min
@Temperature 230 °F
mixed
Shelf Life 6.00 Month
@Temperature 25.0 °C
6.00 Month
@Temperature 77.0 °F
each component from date of manufacture
 
Descriptive Properties
AppearanceDark Gray PasteEP-3500 Resin
 Dark Gray PasteMixed
 Light Gray PasteEP-3500 Hardener

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PLORD9303 / 232659

Chemically Resistant adhesives

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