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Ensinger PEI

Lord Adhesives Circalok™ EP-939 Epoxy Board Level Encapsulant
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: LORD Thermoset™ EP-939 encapsulant is a black, one-component epoxy specifically designed to meet the needs of coating semiconductor devices on printed circuit boards.

All information provided by Lord.

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Physical PropertiesMetricEnglishComments
Specific Gravity 1.49 g/cc1.49 g/cc
Brookfield Viscosity 30000 - 44400 cP
@Temperature 25.0 °C
30000 - 44400 cP
@Temperature 77.0 °F
Spindle 6 @ 10rpm
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 87 - 9587 - 95
Modulus of Elasticity 1.00 GPa145 ksiDMA
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+15 ohm-cm
@Temperature 25.0 °C
1.00e+15 ohm-cm
@Temperature 77.0 °F
Dielectric Constant 4.0
@Frequency 1e+6 Hz
4.0
@Frequency 1e+6 Hz
Dissipation Factor 0.010
@Frequency 1e+6 Hz
0.010
@Frequency 1e+6 Hz
 
Thermal PropertiesMetricEnglishComments
CTE, linear 45.0 µm/m-°C25.0 µin/in-°FBelow Tg; TMA
Glass Transition Temp, Tg 125 °C257 °FTMA
 
Processing PropertiesMetricEnglishComments
Cure Time 20.0 min
@Temperature 150 °C
0.333 hour
@Temperature 302 °F
Pot Life 40320 min
@Temperature 25.0 °C
40320 min
@Temperature 77.0 °F
Gel Time 4.00 min
@Temperature 150 °C
4.00 min
@Temperature 302 °F
Shelf Life 6.00 Month
@Temperature 0.000 - 5.00 °C
6.00 Month
@Temperature 32.0 - 41.0 °F
 
Descriptive Properties
AppearanceBlack
ConsistencyPaste

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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