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Metal adhesives

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Master Bond EP29LPAOHT Two component, thermally conductive, electrically insulative epoxy system
Categories: Polymer; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Key Features:
  • Low exotherm
  • Excellent flow properties
  • Superior dimensional stability
  • Well suited for large potting applications
Master Bond EP29LPAOHT is a two component epoxy system featuring good thermal conductivity along with being electrically isolating. It has convenient handling with a forgiving 100 to 50 mix ratio by weight. It is a low to moderate viscosity system with excellent flow properties. It can be mixed in masses over a gallon because it generates an exceptionally low exotherm. It has a very long open time. The recommended cure schedule is overnight at room temperature followed by 4-6 hours at 150°F to 170°F. It also has very low shrinkage upon curing and dimensional stability. This epoxy bonds well to a wide variety of substrates including metals, glass, ceramics and many different plastics. EP29LPAOHT is a very good heat conductor while retaining reliable electrical insulation values. It is resistant to water, fuels and oils. It has an array of other desirable properties including a high modulus, outstanding compressive strength, and a low coefficient of thermal expansion. Part A is black and Part B is off white. The service temperature range is -60°F to +350°F. EP29LPAOHT is ideally suited for specialty potting applications where large amounts (up to and greater than 1 gallon) of epoxy will be poured at one time.

Product Advantages:

  • Low to moderate viscosity
  • Flows smoothly and readily
  • Long working life at ambient temperatures
  • Good thermal conductivity
  • Reliable electrical insulator

Information provided by Master Bond Inc.

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 5000 - 15000 cPPart B
 25000 - 50000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 80 - 90
Tensile Strength 5000 - 6000 psi
Tensile Modulus 450000 - 500000 psi
Compressive Strength 24000 - 26000 psi
Adhesive Bond Strength 650 - 850 psiTensile Lap Shear; Al/Al
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+15 ohm-cm
Dielectric Constant 4.3
@Frequency 60 Hz
 
Thermal PropertiesOriginal ValueComments
CTE, linear 22.0 - 24.0 µm/m-°C
Thermal Conductivity 6.00 - 8.00 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 177 °C
Minimum Service Temperature, Air -51.0 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 4.00 - 6.00 hour
@Temperature 65.6 - 76.7 °C
Optimum cure schedule: overnight at 75°F followed by 4-6 hours at 150°F to 170°F
Working Life 480 - 600 min
@Temperature 23.9 °C
After mixing, 1000 gram batch
Shelf Life 6.00 Month
 
Descriptive Properties
Mixing ratio100:50 by weight

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PMASTM605 / 249001

Metal adhesives

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