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Metal adhesives

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Master Bond EP46HT-1AO Two Component Epoxy
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive; Epoxy, High Temperature

Material Notes: Key Features:
  • Impressive thermal conductivity
  • Splendid electrical insulation values
  • High glass transition temperature
  • Very long open times at room temperature
  • Wide temperature range of -100°F to +550°F
  • High quality bonding strength
Product Description: Master Bond EP46HT-1AO is a two component high performance epoxy offering high caliber thermal conductivity, superior electrical insulation and top shelf temperature resistance. It is primarily used for bonding and sealing. The service temperature range is eye-catching at -100°F to +550°F. While it does not cure at room temperature, it does cure readily at elevated temperatures. A good curing schedule to optimize properties is 2 hours at 300°F, followed by a few hours at 350-400°F. Some other noteworthy and desirable properties include exceptional physical strength properties and sterling dimensional stability. EP46HT-1AO has a forgiving 100 to 30-35 mix ratio by weight. It should be noted that EP46HT-1AO is relatively exothermic and should not be cured in sections greater than 20-30 thousandths of an inch thick and a bondline thickness is typically 2-7 thousandths of an inch. EP46HT-1AO withstands rigorous thermal cycling and has striking chemical resistance to oils, water, acids, bases and solvents. It bonds terrifically well to metals, composites, glass, ceramics and many plastics. Once cured, the system is a top flight electrical insulator. The color of Part A is tan and Part B is moderately dark brown. EP46HT-1AO is normally recommended for challenging applications found in the electronic, aerospace and specialty OEM industries where the blend of highly desirable properties discussed above is needed.

Product Advantages:

  • Easy application: contact pressure only required for cure, system spreads evenly and smoothly
  • Working life over 24 hours at room temperature
  • Convenient cure schedules at elevated temperatures
  • Commendable thermal conductivity along with first rate electrical insulation properties
  • Sound dimensional stability and physical strength properties
  • Robust chemical resistance
  • Impressive thermal stability and heat resistance

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 20000 - 40000 cP
@Temperature 23.9 °C
Part B, thixotropic
 7500 - 150000 cP
@Temperature 23.9 °C
mixed, thixotropic
 200000 - 400000 cP
@Temperature 50.0 °C
Part A, thixotropic
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 85 - 95
Tensile Strength 7000 - 8000 psi
Elongation at Break 2.0 - 5.0 %
Tensile Modulus 550000 - 650000 psi
Compressive Strength 26000 - 28000 psi
Adhesive Bond Strength 1400 - 1600 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+16 ohm-cm
Dielectric Strength 450 V/mil
@Thickness 3.17 mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 21.0 - 24.0 µm/m-°C
Thermal Conductivity 1.30 - 1.44 W/m-K
Maximum Service Temperature, Air 550 °F
Minimum Service Temperature, Air -100 °F
Glass Transition Temp, Tg 215 - 220 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 2.00 hourPost cure for optimum properties at 350-400°F
 2.00 - 3.00 hour
@Temperature 121 - 149 °C
Working Life >= 1440 minAfter mixing, 100 g batch
Shelf Life 6.00 Month
@Temperature <=23.9 °C
in original, unopened containers
 
Descriptive Properties
Mixing Ratio100:30-35 by weightParts A to B

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PMASTM884 / 185477

Metal adhesives

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