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Master Bond adhesives

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Momentive Performance Materials RTV5249 Neutral Cure, One Component RTV Adhesive Sealant
Categories: Polymer; Adhesive; Thermoset; Silicone; Silicone, RTV, Adhesive/Sealant Grade

Material Notes: RTV5240 series sealants are alkoxy neutral cure, one-component, ready to use, electronic grade silicone adhesive sealants exhibiting high strength that will maintain a strong bond even when exposed to moist environments. RTV5240 series sealant are true neutral curing silicone sealants that release methyl alcohol during cure while exposed to atmospheric moisture at room temperature. Unlike most alkoxy curing silicone sealants, RTV5240 series cures very rapidly.

Key Performance Properties:

  • A non-corrosive curing process that does not produce exothermic heat or corrosive by-products can be used on corrosion-sensitive electrical and electronic equipment with no adverse effect
  • Fast green strength build, fast cure (approximately 4x faster than traditional alkoxy sealants)
  • Low odor cure by-product
  • Tough and resilient sealant with primerless adhesion to most metals, painted surfaces and plastics
  • UL recognized component, File number E-36952
  • Superior hydrolytic stability. The RTV5240 series has demonstrated that it is able to maintain adhesion to many substrates after 20 weeks immersion in 60°C water
  • Excellent electrical insulation properties
  • Withstands exposure to harsh environments such as chemical, ozone, moisture and weathering
  • Compatible with sensitive metals and plastics
  • Good tear resistance
  • Easy handling with no mixing, heating or solvent hazards
  • Retains elastomeric properties at temperatures of -75°F to 400°F

Applications:

The RTV5240 series are recommended for use in aerospace, automotive, appliance and other industries which incorporate electronic components or sensitive metal or plastic substrates into a finished product. Electronic and integrated circuits, semi conductors, and copper connections are typical applications. These products are also suitable for use in moist environments.

The products in this series have fast green strength development and a cure time faster than many two-part sealants. Since they are one-part products, there is no mixing required, and they can be easily dispensed from a simple bulk dispensing pump or cartridges. Base/catalyst ratio control, static mixer maintenance, butterfly testing for mix uniformity, yield loss from base purging, and other activities/costs associated with two-part sealants are eliminated.

GE Silicones became a part of Momentive Performance Materials in 2006.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.50 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 40
Tensile Strength, Ultimate 22.43 kg(f)/cm²
Elongation at Break 425 %
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity 3.00e+15 ohm-cm
Dielectric Constant 2.8
@Frequency 60 Hz
Dielectric Strength 20.0 kV/mm
Dissipation Factor 0.0010
@Frequency 60 Hz
 
Processing PropertiesOriginal ValueComments
Cure Time 6.00 hourTo depth of 3.2 mm
Tack-Free Time 0.750 hour
 
Descriptive Properties
Application rate300 g/min
ColorGray
Sag/Slump2.5 mm
Tooling time10 min

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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PGESIL038 / 41029

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