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Metal adhesives

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Master Bond EP37-3 Two part, very low viscosity epoxy
Categories: Polymer; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Key Features:
  • Room temperature curing epoxy
  • Low viscosity
  • Long working life
  • Low exotherm
  • Optically clear
  • Used in large encapsulation applications
Master Bond EP37-3 is a two part, high performance epoxy system featuring low viscosity, exceptionally low exotherm and a very long pot life. It has a convenient two to one mix ratio by weight and is formulated to cure at room temperature or faster at elevated temperatures. The working life of a 100 gram mass is greater than 10 hours. The extraordinarily long open time is due to the system generating very little heat upon mixing. EP37-3 has a formidable array of outstanding physical properties along with superb optical clarity and light transmission. It is a top notch electrical insulator and is ideally suited for moderate to larger castings. It offers superior resistance to a wide range of chemicals including water, acids, bases, oils and fuels. This system also features low shrinkage upon cure. Although it cures rigid, it has reasonably good impact resistance. It bonds well to a wide variety of substrates including metals, ceramics, glass, optical fibers, polyimide, graphite and many rubbers and plastics. The service temperature range is -80°F to +250°F. This system is 100% reactive and does not contain any solvents or diluents. Its long open time, low exotherm and electrical insulation profile allows it to be used in large encapsulations and for filament winding applications. It is widely used in a variety of industries including aerospace, electronic, optical, fiber-optic, specialty OEM and others.

Product Advantages:

  • Convenient, non-critical two to one mix ratio by weight
  • Very low viscosity, exceptionally long working life
  • Superior physical strength profile
  • Notable electrical insulation characteristics; ideal for larger potting and encapsulation applications
  • Exquisite optical clarity
  • Desirable adhesive for composites, optical fiber, fiber-reinforced materials
  • Exceptionally low shrinkage upon curing

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 10 - 70 cPPart B
 600 - 1700 cPMixed
 10000 - 16000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 70 - 80
Tensile Strength 7000 - 8000 psi
Elongation at Break 5.0 - 10 %
Tensile Modulus 300000 - 350000 psi
Adhesive Bond Strength 2200 - 2400 psiTensile Lap Shear; Al/Al
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+15 ohm-cm
Dielectric Constant 4.1
Dielectric Strength 450 V/mil
@Thickness 3.17 mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 45.0 - 50.0 µm/m-°C
Maximum Service Temperature, Air 121 °C
Minimum Service Temperature, Air -62.0 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 12.0 - 24.0 hourOptimum cure schedule: 12-24 hours at room temp. followed by a post cure at 200°F for 4-5 hours
 5.00 - 6.00 hour
@Temperature 93.3 °C
Option 2
 7.00 - 10.0 hour
@Temperature 23.9 °C
Option 1
Working Life >= 6000 min
@Temperature 23.9 °C
After mixing, 100 gram batch
Shelf Life 12.0 Month
 
Descriptive Properties
Mixing ratio2:1 by weight

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PMASTM610 / 249006

Metal adhesives

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