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Chemically Resistant adhesives

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Lord Adhesives CoolTherm™ SC-324 XLW Thermally Conductive Silicone Encapsulant
Categories: Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade

Material Notes: LORD CoolTherm™ SC-324 XLW 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 thermal conductive materials. provides excellent thermal shock resistance and flame retardancy.

All information provided by Lord.

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Physical PropertiesOriginal ValueComments
Specific Gravity 3.20 g/ccAll components
Water Absorption <= 0.10 %cured; ASTM D 570-81
Viscosity 24000 cP
@Temperature 25.0 °C
SC-324 XLW Hardener
 27000 cP
@Temperature 25.0 °C
mixed
 35000 cP
@Temperature 25.0 °C
SC-324 XLW Resin
 
Chemical PropertiesOriginal ValueComments
Ionic Impurities - Na (Sodium) <= 10 ppmcured
Ionic Impurities - K (Potassium) <= 10 ppmcured
Ionic Impurities - Cl (Chloride) <= 10 ppmcured
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 20cured; ASTM D 2240
Tensile Strength 45.0 psi
@Temperature 25.0 °C
cured; ASTM D 412
Elongation at Break 15 %ASTM D 412
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 2.00e+13 ohm-cm
@Temperature 25.0 °C
cured; ASTM D 257
Dielectric Strength 188 V/mil
 
Thermal PropertiesOriginal ValueComments
CTE, linear 65.0 µm/m-°CASTM D 2240
Thermal Conductivity 4.00 W/m-KHot Disc Transient Method, cured
 
Processing PropertiesOriginal ValueComments
Working Life 360 min
@Temperature 25.0 °C
Mixed
Shelf Life 3.00 Month
@Temperature 25.0 °C
SC-324 XLW Hardener
 6.00 Month
@Temperature 25.0 °C
SC-324 XLW Resin
 
Descriptive Properties
AppearanceLight Pink LiquidMixed
 Pink LiquidSC-324 XLW Resin
 White LiquidSC-324 XLW Hardener
Extractable Ionic Contaminants10 ppm maxAmmonium
 10 ppm maxBromide
 10 ppm maxSulfate

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PLORD9306 / 232662

Chemically Resistant adhesives

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