Lord Adhesives CoolTherm™ SC-320 SLW Thermally Conductive Silicone Encapsulant

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Lord Adhesives CoolTherm™ SC-320 SLW Thermally Conductive Silicone Encapsulant
Categories:	Polymer; Thermoset; Silicone; Silicone Elastomer, for Thermal Management
Material Notes:	CoolTherm™ SC-320 SLW thermally conductive silicone encapsulant is a two-component system designed to provide excellent thermal conductivity for electrical/electronic encapsulating applications, while retaining desirable properties associated with silicones. 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 for ease of component encapsulation compared to other highly thermally conductive materials. 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	Original Value	Comments

Specific Gravity	3.10 g/cc	SC-320 Resin
	3.10 g/cc	SC-320 SLW Hardener
	3.10 g/cc	Mixed
Water Absorption	<= 0.10 %	cured; ASTM D 570-81
Viscosity	20000 cP @Temperature 25.0 °C	SC-320 SLW Hardener
	22500 cP @Temperature 25.0 °C	Mixed
	25000 cP @Temperature 25.0 °C	SC-320 Resin

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

Mechanical Properties	Original Value	Comments
Hardness, Shore A	24	ASTM D 2240
Tensile Strength	36.0 psi	cured; ASTM D 412
Elongation at Break	40 %	cured; ASTM D 412

Electrical Properties	Original Value	Comments
Volume Resistivity	4.00e+13 ohm-cm @Temperature 25.0 °C	cured; ASTM D 257

Thermal Properties	Original Value	Comments
CTE, linear	110 µm/m-°C	cured; ASTM C 864
Thermal Conductivity	3.20 W/m-K	Hot Disc Transient Method, cured
Flammability, UL94	V-0

Processing Properties	Original Value	Comments
Working Life	180 min @Temperature 25.0 °C	Mixed
Gel Time	20.0 min @Temperature 120 °C	mixed
Shelf Life	9.00 Month @Temperature 25.0 °C	each component from date of manufacture

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

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PLORD9293 / 232649

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