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Chemically Resistant adhesives

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Master Bond MasterSil 151AN Silicone Features High Thermal Conductivity
Categories: Polymer; Thermoset; Silicone

Material Notes: Description: Master Bond MasterSil 151AN is a two component, low viscosity silicone compound for high performance potting and encapsulation. This system combines high temperature resistance, good flexibility, thermal conductivity and electrical insulation properties. It is an addition cured system and does not require exposure to air for complete cross-linking. It has a 100 to five mix ratio by weight. It is 100% solids, contains no solvents or diluents and will not outgas while curing. MasterSil 151AN system is a low viscosity making it highly desirable for potting and encapsulation. As a silicone system, it offers excellent flexibility and high temperature resistance. Its flexibility allows it to withstand severe thermal cycling and resist vibration and shock. Also, it is very water resistant. These properties make this system well suited for applications involving sensitive optical and electronic components where heat dissipation is critical. Some additional applications include heat sink attachment, potting sensors and thermocouple applications, among many other uses. MasterSil 151AN is gray in color. The service temperature range for this system is -65°F to +400° F.

Product Advantages:

  • Addition cured; no by-products released during cure; does not require air for curing.
  • Low exotherm; very long pot life.
  • Readily cures at ambient temperatures or faster cure at elevated temperatures.
  • Can cure in thicknesses up to and beyond 1-2 inches.
  • Very low shrinkage upon cure.
  • Low viscosity ideal for potting and encapsulation.
  • Superior electrical insulation properties.
  • Outstanding flexibility combined with high temperature resistance and very good thermal conductivity.

Information provided by MasterBond®

Vendors: Master Bond is a leading manufacturer of adhesives, sealants, coatings and potting compounds. Master Bond’s vast product line consists of over 3,000 epoxy, polyurethane, silicone, cyanoacrylate and latex adhesives that vary in viscosity, cure speed, strength, chemical resistance, electrical properties, etc. Our custom adhesives offer design flexibility and provide excellent bonding performance. Visit www.masterbond.com.

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Physical PropertiesOriginal ValueComments
Viscosity 50 - 150 cPPart B
 17000 - 240000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 75 - 85
Tensile Strength at Break 800 - 900 psi
Elongation at Break 120 - 150 %
Shear Strength >= 40.0 psiBond, Al to Al
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 1.00e+14 ohm-cm
Dielectric Constant 2.7
@Frequency 100 Hz,
Temperature 25.0 °C
Dielectric Strength 450 V/mil
@Thickness 3.17 mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 120 - 150 µm/m-°C
Thermal Conductivity 22.0 - 24.0 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 400 °F
Minimum Service Temperature, Air -65.0 °F
 
Processing PropertiesOriginal ValueComments
Cure Time 2.00 - 3.00 hour
@Temperature 93.3 °C
 48.0 - 72.0 hour
@Temperature 23.9 °C
Pot Life 2.0 - 4.0 min100 gram batch
Shelf Life 6.00 Month
@Temperature 23.9 °C
in original unopened containers
 
Descriptive Properties
Mixing Ratio (A to B)100:50by weight

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PMASTB333 / 149580

Chemically Resistant adhesives

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