Lord Adhesives CoolTherm™ SC-320 THK Thermally Conductive Silicone

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Lord Adhesives CoolTherm™ SC-320 THK Thermally Conductive Silicone
Categories:	Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade
Material Notes:	LORD CoolTherm™ SC-320 THK thermally conductive silicone is a two-component system designed to provide excellent thermal conductivity for electrical/electronic applications, while retaining desirable properties associated with silicones. CoolTherm SC-320 THK silicone evolves minute quantities of hydrogen gas. Do not repackage or store material in unvented containers. Adequately ventilate work area to prevent the accumulation of gas. Features: exhibits low shrinkage and stress on components as it cures. composed of an addition-curing polydimethyl siloxane polymer that will not depolymerize when heated in confined spaces. maintains low viscosity during dispensing, with minimal flow after dispensing. provides excellent thermal shock resistance. provides excellent flame retardancy; UL 94 V-0 certified. All information provided by Lord.
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Physical Properties	Metric	English	Comments

Specific Gravity	3.10 g/cc	3.10 g/cc	All components
Water Absorption	<= 0.10 %	<= 0.10 %	ASTM D 570-81

Chemical Properties	Metric	English	Comments
Ionic Impurities - Na (Sodium)	<= 10 ppm	<= 10 ppm	cured
Ionic Impurities - K (Potassium)	<= 10 ppm	<= 10 ppm	cured
Ionic Impurities - Cl (Chloride)	<= 10 ppm	<= 10 ppm	cured

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	60	60	cured; ASTM D 2240
Tensile Strength	2.00 MPa	290 psi	cured; ASTM D 412
Elongation at Break	50 %	50 %	ASTM D 412

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+14 ohm-cm @Temperature 25.0 °C	>= 1.00e+14 ohm-cm @Temperature 77.0 °F	cured; ASTM D 257

Thermal Properties	Metric	English	Comments
CTE, linear	110 µm/m-°C	61.1 µin/in-°F	ASTM C 864
Thermal Conductivity	3.00 W/m-K	20.8 BTU-in/hr-ft²-°F	Hot Disc Transient Method, cured
Flammability, UL94	V-0	V-0

Processing Properties	Metric	English	Comments
Working Life	40.0 min @Temperature 25.0 °C	40.0 min @Temperature 77.0 °F	Mixed
Gel Time	2.00 - 5.00 min @Temperature 121 °C	2.00 - 5.00 min @Temperature 250 °F
Shelf Life	9.00 Month @Temperature 25.0 °C	9.00 Month @Temperature 77.0 °F	each component from date of manufacture

Descriptive Properties
Appearance	Light Pink Liquid		Mixed
	Pink Liquid		SC-320 THK Resin
	White Liquid		SC-320 THK Hardener
Extractable Ionic Contaminants	10 ppm max		Ammonium
	10 ppm max		Bromide
	10 ppm max		Sulfate

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