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Chemically Resistant adhesives

Lord Adhesives CoolTherm™ EP-343 Thermally Conductive Epoxy Conformal Coating
Categories: Polymer; Thermoset; Epoxy; Epoxy, Thermally Conductive
Material Notes: LORD CoolTherm™ EP-343 coating is a two-component, dielectric epoxy coating recommended for coating printed circuit boards, semiconductors and heat sink assemblies. CoolTherm EP-343 coating efficiently distributes heat from the circuits throughout the coated surface of the board.

Features: provides high electrical insulation with exceptionally good heat transfer. provides good resistance to water and a wide variety of chemicals. can be used on parts and devices that experience operating temperatures from -65°C to +130°C. maintains low viscosity, allowing easy application with conventional spray equipment. meets requirements of Military Specification MIL-E-5272. cured system is free of dimpling; provides good edge coverage and excellent hiding power, even in thin applications.

All information provided by Lord.
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Physical PropertiesMetricEnglishComments
Specific Gravity 0.990 g/cc0.990 g/ccEP-343 Hardener
 1.35 g/cc1.35 g/ccMixed
 1.41 g/cc1.41 g/ccEP-343 Resin
Water Absorption 0.20 %
@Temperature 25.0 °C,
Time 864000 sec		0.20 %
@Temperature 77.0 °F,
Time 240 hour		cured
Viscosity  55 cP
@Temperature 25.0 °C		55 cP
@Temperature 77.0 °F		EP-343 Hardener
 55 cP
@Temperature 25.0 °C		55 cP
@Temperature 77.0 °F		Mixed
 65 cP
@Temperature 25.0 °C		65 cP
@Temperature 77.0 °F		EP-343 Resin
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 9090cured
Tensile Strength 57.2 MPa
@Temperature 25.0 °C		8300 psi
@Temperature 77.0 °F		cured
Elongation at Break 1.9 %1.9 %cured
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+16 ohm-cm
@Temperature 25.0 °C		1.00e+16 ohm-cm
@Temperature 77.0 °F		cured; ASTM D 257
Dielectric Constant 5.6
@Frequency 100000 Hz,
Temperature 25.0 °C		5.6
@Frequency 100000 Hz,
Temperature 77.0 °F		cured
Dielectric Strength 59.1 kV/mm
@Thickness 0.0762 mm		1500 kV/in
@Thickness 0.00300 in		cured
Dissipation Factor 0.020
@Frequency 100000 Hz,
Temperature 25.0 °C		0.020
@Frequency 100000 Hz,
Temperature 77.0 °F		cured
 
Thermal PropertiesMetricEnglishComments
CTE, linear 24.0 µm/m-°C13.3 µin/in-°Fcured; ASTM C 864
Thermal Conductivity 1.10 W/m-K7.63 BTU-in/hr-ft²-°Fcured
Maximum Service Temperature, Air 130 °C266 °F
Minimum Service Temperature, Air -65.0 °C-85.0 °F
Glass Transition Temp, Tg 106 °C223 °Fcured
 
Processing PropertiesMetricEnglishComments
Working Life 1440 min
@Temperature 25.0 °C		1440 min
@Temperature 77.0 °F		Mixed
Shelf Life  12.0 Month
@Temperature 25.0 °C		12.0 Month
@Temperature 77.0 °F		EP-343 Resin
 24.0 Month
@Temperature 25.0 °C		24.0 Month
@Temperature 77.0 °F		EP-343 Hardener
 
Descriptive Properties
AppearanceAmber LiquidEP-343 Hardener
 Black LiquidEP-343 Resin
 Black LiquidMixed

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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Chemically Resistant adhesives




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