Lord Adhesives Circalok™ 6703A/B Thermally Conductive Two Part Silicone, Flame Retardant

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Lord Adhesives Circalok™ 6703A/B Thermally Conductive Two Part Silicone, Flame Retardant
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade
Material Notes:	Circalok™ 6703 A/B is a low viscosity, high density, thermally conductive, two part silicone. Circalok™ 6703 A/B is an ideal material for potting or encapsulating densely packed power units requiring a thermal transfer. Its low viscosity permits easy use for high density population electronics while assuring very good thermal properties. Circalok™ 6703 A/B is a flame retardant system and is certified to UL94V-O. All information provided by Lord.
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Physical Properties	Original Value	Comments

Specific Gravity	1.91 g/cc	Hardener
	2.00 g/cc	Mixed
	2.09 g/cc	Resin
Viscosity	5500 cP @Temperature 25.0 °C	Part B
	8000 cP @Temperature 25.0 °C	Mixed
	13500 cP @Temperature 25.0 °C	Part A
Linear Mold Shrinkage	0.0030 in/in

Mechanical Properties	Original Value	Comments
Hardness, Shore A	60
Tensile Strength, Yield	200 psi
Elongation at Yield	80 %
Tear Strength	60.0 pli	Die B

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+14 ohm-cm
Dielectric Constant	4.25 @Frequency 1e+6 Hz, Temperature 25.0 °C
Dielectric Strength	500 V/mil
Dissipation Factor	0.020 @Frequency 1e+6 Hz, Temperature 25.0 °C

Thermal Properties	Original Value	Comments
CTE, linear	2.20 µm/m-°C
Thermal Conductivity	0.800 W/m-K	Mathis Hot Disc Transient Method
Maximum Service Temperature, Air	200 °C
Flammability, UL94	V-0

Processing Properties	Original Value	Comments
Cure Time	4.00 hour @Temperature 65.0 °C
Pot Life	60 - 120 min @Temperature 25.0 °C
Shelf Life	9.00 Month @Temperature 25.0 °C	Part A
	9.00 Month @Temperature 25.0 °C	Part B

Descriptive Properties
Appearance	Black	Part A
	Dark Gray	Mixed
	White	Part B
Mix Ratio	100:100	by weight
	100:109.4	by volume

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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PLORD061 / 86069

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