eFunda Polymers: Properties of Silicone {flexible casting resins (including RTV)}
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Silicone		  
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Application: flexible casting resins (including RTV)
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Tensile Strength (MPa)   3 - 7 at break   D638
Elongation at break (%)   20 - 700     D638
Hardness   10 - 70  Shore A   D638

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   10 - 19     D696
Thermal Conductivity (W/m-ºC)  0.146 - 0.314     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  0.97 - 2.5   D792
Water Absorption (% weight increase)  0.1  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   400 - 550   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Linear Mold Shrinkage (cm/cm)  0 - 0.006   D955

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Suppliers
Bayer Corp. Pittsburgh, PA  800-662-2927
Dow Corning Corp. Midland, MI  800-346-9882
Emerson & Cuming Specialty Polymers Billerica, MA  800-832-4929
GE Silicones Waterford, NY  800-255-8886

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