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Chemically Resistant adhesives

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Epoxy Technology EPO-TEK® H77 Black Thermally Conductive Epoxy
Categories: Polymer; Thermoset; Epoxy; Epoxy, Thermally Conductive

Material Notes: Product Description: EPO-TEK® H77 Black is a two component, thermally conductive, electrically insulating epoxy system designed for lid sealing of hybrids found in hermetic packaging of micro-electronics. Lids can be ceramic, glass, aluminum or kovar. Package types can be plastic, metal cases or ceramic.

Advantages & Application Notes:

  • Very high temperature epoxy. Coatings on metals have been subjected to temperatures as high as 260°C without bond failure. It can also resist >300°C processes found in ceramic or hermetic packaging.
  • Rheology provides a soft, smooth, flowing paste with excellent handling characteristics. Its low viscosity nature allows it to be poured or cast into shape for potting applications. It is compatible with automated dispense equipment, screen printing or stamping techniques.
  • Excellent solvent and chemical resistance. Excellent for harsh chemical environments found in aircraft, under-hood automotive, medical and petrochemical refineries like down-hole applications.
  • It provides near hermetic seals in the packaging of MEMs devices, such as pressure sensors or accelerometers, packaged in TO-cans.
  • Suggested for ultra-high vacuum applications.
  • It can be also be used for sealing of optical filter windows found in scientific OEM or sensor devices.

Information Provided by Epoxy Technology

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.22 g/ccPart B
 2.53 g/ccPart A
Particle Size <= 50 µm
Viscosity 6000 - 12000 cP
@Temperature 23.0 °C
20 rpm
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 90
Tensile Modulus 905000 psiStorage
Shear Strength 1523 psiLap
 >= 1700 psiDie
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 2.80e+13 ohm-cm
Dielectric Constant 5.91
@Frequency 1000 Hz
Dissipation Factor 0.0080
@Frequency 1000 Hz
 
Thermal PropertiesOriginal ValueComments
CTE, linear 38.0 µm/m-°CBelow Tg
 156 µm/m-°CAbove Tg
Thermal Conductivity 0.660 W/m-K
Maximum Service Temperature, Air 250 °CContinuous
 350 °CIntermittent
Minimum Service Temperature, Air -55.0 °CContinuous
 -55.0 °CIntermittent
Glass Transition Temp, Tg >= 75.0 °CDynamic Cure 20—200°C /ISO 25 Min; Ramp 40—200°C @ 20°C/Min
Decomposition Temperature 405 °CDegradation Temperature
 
Processing PropertiesOriginal ValueComments
Cure Time 1.00 hour
@Temperature 150 °C
Minimum Bond Line
Pot Life 360 min
Shelf Life 12.0 Month
@Temperature 25.0 °C
 
Descriptive Properties
ColorAmberPart B
 BlackPart A
ConsistencySmooth pourable paste
Mix Ratio by Weight100:15
Number of ComponentsTwo
Thixotropic Index1.72
Weight Loss0.15%200°C
 0.38%250°C
 1.47%300°C

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PPOXYT085 / 141124

Chemically Resistant adhesives

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