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Metal adhesives

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Tra-Con Tra-Duct 2902 Room Temperature Conductive Silver Epoxy Adhesive
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy, Electrically Conductive; Filled/Reinforced Thermoset

Material Notes: TRA-DUCT 2902 is an electrically conducting silver-filled epoxy compound recommended for electronic bonding and sealing applications that require a combination of good mechanical and electrical properties. This two-part, smooth paste formulation of refined pure silver and epoxy is free of solvents and copper or carbon additives. It develops strong, durable, electrically and thermally conducting bonds and coatings between many different and dissimilar materials such as metals, ceramics, glass and plastic laminates. TRA-DUCT 2902 cures at room temperature and can be used as a cold solder for heat-sensitive components where hot-soldering is impractical. It also can be used for the assembly and repair of electrical modules, printed circuits, wave guides, flat cables and high frequency shields. This adhesive complies with the requirements of NASA Outgassing Specification.

Information provided by Tra-Con Inc.

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Physical PropertiesOriginal ValueComments
Specific Gravity 3.20 g/ccMixed
Viscosity 20000 cPMixed (cp #52, 10 rpm)
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 80
Adhesive Bond Strength 700 psiLap shear, alum to alum, 24 hrs @ 25°C
 1000 psiLap shear, alum to alum, 2 hrs @ 65°C
 1600 psiLap shear, alum to alum, 1 hr @ 110°C
 1600 psiLap shear, alum to alum, 15 min @ 150°C
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 0.00030 ohm-cmcured 5 min @ 160°C
 0.00050 ohm-cmcured 15 min @ 150°C
 0.00060 ohm-cmcured 1 hr @ 110°C
 0.00090 ohm-cmcured 2 hrs @ 65°C
 0.0010 ohm-cmcured 24 hrs @ 25°C
 
Thermal PropertiesOriginal ValueComments
CTE, linear 49.0 µm/m-°C
@Temperature 20.0 °C
Thermal Conductivity 2.99 W/m-K
Maximum Service Temperature, Air 110 °C
Minimum Service Temperature, Air -60.0 °C
Glass Transition Temp, Tg 52.0 °CUltimate Tg, 24 hrs @ 25°C
 
Processing PropertiesOriginal ValueComments
Cure Time 1.00 - 4.00 hour
@Temperature 65.0 °C
 24.0 hour
@Temperature 25.0 °C
Pot Life 60 min
 
Descriptive Properties
Color Silver
Cytotoxicity Study PassesISO 10993-5, elution method
Mix Ratio, parts by weight100/6Resin/Hardener
Outgassing, NASA Passes
Outgassing, NASA, %CVCM0.05

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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PTRAC077 / 71005

Metal adhesives

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