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Chemically Resistant adhesives

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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 PropertiesOriginal ValueComments
Specific Gravity 2.94 g/cc
@Temperature 25.0 °C
EP-3500 Resin
 2.96 g/cc
@Temperature 25.0 °C
Mixed
 2.98 g/cc
@Temperature 25.0 °C
EP-3500 Hardener
Viscosity 7500 cP
@Temperature 60.0 °C
EP-3500 Hardener, 10s^-1 Shear Rate
 11700 cP
@Temperature 60.0 °C
mixed, 10s^-1 Shear Rate
 12000 cP
@Temperature 60.0 °C
EP-3500 Resin, 10s^-1 Shear Rate
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 90ASTM D 2240
Modulus of Elasticity 2900 ksiby DMA
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+14 ohm-cm
@Temperature 25.0 °C
cured; ASTM D 257
Dielectric Strength 390 V/milASTM D 149
 
Thermal PropertiesOriginal ValueComments
CTE, linear 10.4 µm/m-°C
Thermal Conductivity 3.50 W/m-K
Maximum Service Temperature, Air 200 °C
Glass Transition Temp, Tg 206 °Cby TMA
 
Processing PropertiesOriginal ValueComments
Working Life >= 180 min
@Temperature 60.0 °C
Mixed
Gel Time 60.0 min
@Temperature 110 °C
mixed
Shelf Life 6.00 Month
@Temperature 25.0 °C
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 go back to viewing the property data in MatWeb's normal format.

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PLORD9303 / 232659

Chemically Resistant adhesives

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