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Chemically Resistant adhesives

Parker Chomerics THERM-A-FORM T646 Cure-in-Place Potting and Underfill Material
Categories: Polymer; Thermoset; Silicone

Material Notes: Description: THERM-A-FORM™ thermally conductive silicone elastomer products are dispensable form-in-place compounds designed for heat transfer without excessive compressive force in electronics cooling applications. These versatile liquid reactive materials can be dispensed and cured into complex geometries for cooling of multi-height components on a PCB without the expense of a molded sheet. Each compound is available in ready-to-use cartridge systems, eliminating weighing, mixing, and degassing procedures.

Product Attributes: Provides combination of high thermal performance and low cost

Information provided by Chomerics

Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Specific Gravity 2.45 g/cc2.45 g/ccASTM D792
Viscosity 3.0 cP3.0 cPASTM D2196
Outgassing - Total Mass Loss 0.17 %0.17 %TML; ASTM D595
Collected Volatile Condensable Material 0.10 %0.10 %ASTM D595
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore A 5050ASTM D2240
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cmASTM D257
Dielectric Constant 6.5
@Frequency 1e+6 Hz
6.5
@Frequency 1e+6 Hz
ASTM D150
Dielectric Strength 10.0 kV/mm254 kV/inASTM D149
Dissipation Factor 0.013
@Frequency 1e+6 Hz
0.013
@Frequency 1e+6 Hz
Chomerics
 
Thermal PropertiesMetricEnglishComments
CTE, linear 250 µm/m-°C139 µin/in-°FASTM E831
Specific Heat Capacity 1.00 J/g-°C0.239 BTU/lb-°FASTM E1269
Thermal Conductivity 0.900 W/m-K6.25 BTU-in/hr-ft²-°FASTM D5470
Maximum Service Temperature, Air 150 °C302 °F
Minimum Service Temperature, Air -50.0 °C-58.0 °F
Brittleness Temperature -55.0 °C-67.0 °FASTM D2137
Flammability, UL94 HBHB
 
Processing PropertiesMetricEnglishComments
Cure Time  3.00 min
@Temperature 150 °C
0.0500 hour
@Temperature 302 °F
 60.0 min
@Temperature 60.0 °C
1.00 hour
@Temperature 140 °F
 2880 min
@Temperature 23.0 °C
48.0 hour
@Temperature 73.4 °F
Pot Life 300 min
@Temperature 23.0 °C
300 min
@Temperature 73.4 °F
2X Starting Viscosity
Shelf Life 3.00 Month3.00 MonthFrom date of Manufacture
 
Descriptive Properties
BinderSilicone
ColorYellow
Extractable Silicone0.15
FillerAluminum Oxide
Mix Ratio1:1
Number of Components2-part

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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PCHOME424 / 131134

Chemically Resistant adhesives

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