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Chemically Resistant adhesives

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Lord Adhesives CoolTherm™ SC-320 Thermally Conductive Silicone Encapsulant
Categories: Polymer; Thermoset; Silicone; Silicone Elastomer, for Thermal Management

Material Notes: LORD CoolTherm™ SC-320 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 PropertiesOriginal ValueComments
Specific Gravity 3.10 g/ccSC-320 Resin
 3.10 g/ccSC-320 Hardener
 3.10 g/ccMixed
Water Absorption <= 0.10 %cured; ASTM D 570-81
Viscosity 20000 cP
@Temperature 25.0 °C
SC-320 Hardener
 22000 cP
@Temperature 25.0 °C
Mixed
 25000 cP
@Temperature 25.0 °C
SC-320 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 60ASTM D 2240
Tensile Strength 313 psicured; ASTM D 412
Elongation at Break 50 %cured; ASTM D 412
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+14 ohm-cm
@Temperature 25.0 °C
cured; ASTM D 257
 
Thermal PropertiesOriginal ValueComments
CTE, linear 110 µm/m-°Ccured; ASTM E 831
Thermal Conductivity 3.20 W/m-KHot Disc Transient Method, cured
Flammability, UL94 V-0
 
Processing PropertiesOriginal ValueComments
Working Life 40.0 min
@Temperature 25.0 °C
Mixed
Gel Time 2.00 - 5.00 min
@Temperature 121 °C
mixed
Shelf Life 9.00 Month
@Temperature 25.0 °C
each component from date of manufacture
 
Descriptive Properties
AppearanceLight Pink LiquidMixed
 Pink LiquidSC-320 Resin
 White LiquidSC-320 Hardener
Extractable Ionic Contaminants10 ppm maxAmmonium
 10 ppm maxBromide
 10 ppm maxSulfate

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PLORD9292 / 232648

Chemically Resistant adhesives

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