Tra-Con Tra-Bond 789-4 Thermally Conductive Adhesive

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Tra-Con Tra-Bond 789-4 Thermally Conductive Adhesive
Categories:	Polymer; Adhesive; Thermoset
Material Notes:	TRA-BOND 789-4 one component, thermally conductive adhesive is designed for such applications as substrate attach, sealing micro-electronic packages, heat sink attach, and component staking. This adhesive provides four (4) times more thermal conductivity than unfilled epoxy adhesives. TRA-BOND 789-4 adhesive exhibits strong adhesion to difficult-to-bond metals, such as gold, silver, and copper. It retains its bond strength after exposure to moisture. Information provided by Tra-Con Inc.
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Physical Properties	Original Value	Comments

Viscosity	75000 cP	Mixed (cp #51, 5 rpm)

Mechanical Properties	Original Value	Comments
Adhesive Bond Strength	3500 psi	Lap shear, alum to alum
	4000 psi	Lap shear, gold to gold

Electrical Properties	Original Value	Comments
Volume Resistivity	6.00e+14 ohm-cm
Dielectric Constant	6.4 @Frequency 1000 Hz
Dielectric Strength	600 V/mil
Dissipation Factor	0.0010 @Frequency 1000 Hz

Thermal Properties	Original Value	Comments
CTE, linear	35.0 µm/m-°C	Below Tg
	100 µm/m-°C	Above Tg
Thermal Conductivity	0.700 W/m-K @Temperature 121 °C
Maximum Service Temperature, Air	150 °C
Minimum Service Temperature, Air	-60.0 °C
Glass Transition Temp, Tg	130 °C	Ultimate Tg

Processing Properties	Original Value	Comments
Cure Time	1.00 hour @Temperature 125 °C
	30.0 min @Temperature 150 °C
Shelf Life	6.00 Month	At 5°C
	12.0 Month @Temperature -40.0 °C

Descriptive Properties
Color	Cream
Outgassing, NASA	Passes
Weight Loss %	0.28	At 250°C
Working Life, months	3	At 25°C

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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PTRAC157 / 71085

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