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Chemically Resistant adhesives

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Lord Adhesives CoolTherm™ SC-252 Silicone encapsulant system
Categories: Polymer; Thermoset; Silicone; Silicone, RTV, Encapsulation Grade

Material Notes: LORD CoolTherm™ SC-252 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. CoolTherm SC-252 encapsulant can be either room temperature cured or heat cured for maximum adhesion.

Features: exhibits low shrinkage and stress on components as it cures. maintains low viscosity for ease of component encapsulation compared to other highly thermally conductive materials. provides high thermal conductivity for applications where superior heat dissipation is required. composed of an addition-curing polydimethyl siloxane polymer that will not depolymerize when heated in confined spaces. provides excellent thermal shock resistance.

All information provided by Lord.

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Physical PropertiesOriginal ValueComments
Specific Gravity 2.92 g/ccSC-252 Resin
 2.93 g/ccMixed
 2.95 g/ccSC-252 Hardener
Viscosity 17000 cP
@Temperature 25.0 °C
SC-252 Hardener, 10s^-1 Shear Rate
 18000 cP
@Temperature 25.0 °C
SC-252 Resin, 10s^-1 Shear Rate
 18000 cP
@Temperature 25.0 °C
mixed, 10s^-1 Shear Rate
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 60cured; ASTM D 2240
Tensile Strength 145 psi
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+14 ohm-cm
@Temperature 25.0 °C
cured; ASTM D 257
Dielectric Constant 5.0
@Frequency 1e+6 Hz,
Temperature 25.0 °C
cured; ASTM D 150
Dissipation Factor 0.0070
@Frequency 1e+6 Hz,
Temperature 25.0 °C
cured; ASTM D 150
 
Thermal PropertiesOriginal ValueComments
Thermal Conductivity 2.50 W/m-KHot Disc Transient Method, cured
 
Processing PropertiesOriginal ValueComments
Working Life 45.0 min
@Temperature 25.0 °C
Mixed
Gel Time 2.00 min
@Temperature 121 °C
mixed
Shelf Life 6.00 Month
@Temperature 25.0 °C
each component from date of manufacture
 
Descriptive Properties
AppearanceGrey liquidSC-252 Resin
 Grey liquidMixed
 White LiquidSC-252 Hardener

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PLORD9301 / 232657

Chemically Resistant adhesives

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