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Chemically Resistant adhesives

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Epoxy Technology EPO-TEK® H77T Thermally Conductive Epoxy
Categories: Polymer; Thermoset; Epoxy; Epoxy, Thermally Conductive

Material Notes: Product Description: EPO-TEK® H77T is a two component, thermally conductive, electrically insulating epoxy 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:

  • High temperature epoxy. Coatings on metals have been subjected to temperatures as high as 260°C without bond failure; can also resist >300°C processes found in ceramic or hermetic packaging.
  • Rheology yields a thixotropic paste intended for dispensing and printing applications.
  • Available in lower viscosity for better flow properties.
  • Excellent solvent and chemical resistance - ideal for harsh environments found in aircraft, under-hood automotive, medical, and petrochemical refineries such as down-hole applications.
  • Can provide near hermetic seals in the packaging of MEMs devices, like pressure sensors or accelerometers, packaged in TO-cans.
  • Suggested for ultra-high vacuum applications.
  • It can 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
 2.69 g/ccPart A
Particle Size <= 50 µm
Viscosity 23000 - 34000 cP
@Temperature 23.0 °C
10 rpm
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 89
Tensile Modulus 783000 psiStorage
Shear Strength 1215 psiLap
 >= 1700 psiDie
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 2.00e+13 ohm-cm
Dielectric Constant 5.4
@Frequency 1000 Hz
Dissipation Factor 0.0040
@Frequency 1000 Hz
 
Thermal PropertiesOriginal ValueComments
CTE, linear 34.0 µm/m-°CBelow Tg
 127 µm/m-°CAbove Tg
Thermal Conductivity 1.10 W/m-K
Maximum Service Temperature, Air 260 °CContinuous
 360 °CIntermittent
Minimum Service Temperature, Air -55.0 °CContinuous
 -55.0 °CIntermittent
Glass Transition Temp, Tg >= 80.0 °CDynamic Cure 20—200°C /ISO 25 Min; Ramp 10—200°C @ 20°C/Min
Decomposition Temperature 413 °CDegradation Temperature
 
Processing PropertiesOriginal ValueComments
Cure Time 1.00 hour
@Temperature 150 °C
Minimum Bond Line
Pot Life 480 min
Shelf Life 12.0 Month
@Temperature 25.0 °C
 
Descriptive Properties
ColorAmberPart B
 GrayPart A
ConsistencyPaste
Mix Ratio by Weight100:15
Number of ComponentsTwo
Thixotropic Index3
Weight Loss<0.05%200°C
 0.08%250°C
 0.22%300°C

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PPOXYT087 / 141126

Chemically Resistant adhesives

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