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Chemically Resistant adhesives

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Lord Adhesives Thermoset/CoolTherm™ EP 340/70 Epoxy System Epoxy Resin System
Categories: Polymer; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: LORD CoolTherm™ EP-340/70 epoxy system is a two-component system designed to provide maximum thermal conductivity and outstanding mechanical properties. CoolTherm EP-340/70 system offers a very low coefficient of thermal expansion and is appropriate for applications where the expansion and contraction of an epoxy encapsulation system must be maintained. Handling and cured properties of the two-component epoxy system are dependent on the hardener used with CoolTherm EP-340 epoxy resin.

Features: provides low viscosity and surface tension, enabling void-free casting without a vacuum step. provides a working life of over one hour; appropriate for cured system that experiences operating temperature of 130°C or below. cured system is UL 94 HB certified.

All information provided by Lord.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.01 g/ccHardener 70
 2.40 g/ccEP-340 Epoxy Resin
Viscosity 10000 cP
@Temperature 25.0 °C
mixed
 300000 cP
@Temperature 25.0 °C
EP-340 Epoxy Resin
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 90cured
Tensile Strength 9400 psi
@Temperature 25.0 °C
cured
Elongation at Break 4.1 %cured
Flexural Strength 15000 psi
Flexural Modulus 15000 psiASTM 790
Compressive Yield Strength 16000 psiASTM D 695
Izod Impact, Notched 0.480 ft-lb/inASTM D 256
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 3.00e+10 ohm-cm
@Temperature 130 °C
cured; ASTM D 257
 4.00e+11 ohm-cm
@Temperature 105 °C
cured; ASTM D 257
 6.00e+15 ohm-cm
@Temperature 25.0 °C
cured; ASTM D 257
Dielectric Constant 3.4
@Frequency 1e+6 Hz,
Temperature 25.0 °C
cured; ASTM D 150
Dielectric Strength 430 V/milcured; ASTM D 149
Dissipation Factor 0.034
@Frequency 1e+6 Hz,
Temperature 25.0 °C
cured; ASTM D 150
 
Thermal PropertiesOriginal ValueComments
CTE, linear 31.0 µm/m-°Ccured
Thermal Conductivity 1.40 W/m-Kcured
Maximum Service Temperature, Air 130 °C
Flammability, UL94 HB
 
Processing PropertiesOriginal ValueComments
Cure Time 24.0 hour
@Temperature 25.0 °C
mixed
Working Life 100 min
@Temperature 25.0 °C
Mixed
Shelf Life 6.00 Month
@Temperature 25.0 °C
EP-340 Epoxy Resin
 24.0 Month
@Temperature 25.0 °C
Hardener 70
 
Descriptive Properties
AppearanceBlack LiquidEP-340 Epoxy Resin
 Tan LiquidHardener 70
Mix Ratio100 to 16.5Resin to hardener, by volume
 100 to 7Resin to hardener, by weight

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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PLORD9249 / 232605

Chemically Resistant adhesives

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