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Metal adhesives

Master Bond EP29LP Low Exotherm, Low Viscosity Two Component Epoxy System
Categories: Polymer; Adhesive; 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
Product Description: Master Bond EP29LP 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 and when mixing 1 pound, the working life exceeds 5 hours. The extraordinarily long open time is due to the system generating very little heat upon mixing. EP29LP 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 -60°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 PropertiesMetricEnglishComments
Viscosity 10 - 70 cP10 - 70 cPPart B
 600 - 1700 cP600 - 1700 cPmixed
 10000 - 16000 cP10000 - 16000 cPPart A
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength >= 55.2 MPa>= 8000 psi
Elongation at Break <= 5.0 %<= 5.0 %
Tensile Modulus >= 2.76 GPa>= 400 ksi
Adhesive Bond Strength >= 19.3 MPa>= 2800 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+15 ohm-cm>= 1.00e+15 ohm-cm
Dielectric Constant 3.9
@Frequency 60 Hz
3.9
@Frequency 60 Hz
Dielectric Strength 17.7 kV/mm
@Thickness 3.17 mm
450 kV/in
@Thickness 0.125 in
 
Thermal PropertiesMetricEnglishComments
CTE, linear 45.0 - 50.0 µm/m-°C25.0 - 27.8 µin/in-°F
Maximum Service Temperature, Air 121 °C250 °F
Minimum Service Temperature, Air -51.1 °C-60.0 °F
 
Processing PropertiesMetricEnglishComments
Cure Time  300 - 360 min
@Temperature 93.3 °C
5.00 - 6.00 hour
@Temperature 200 °F
 720 - 1440 min
@Temperature 23.9 °C
12.0 - 24.0 hour
@Temperature 75.0 °F
Optimum cure schedule: followed by a post cure at 200°F for 4-5 hours
 10100 - 14400 min
@Temperature 23.9 °C
168 - 240 hour
@Temperature 75.0 °F
Working Life >= 300 min>= 300 minworking life after mixing, 1 pound
 >= 600 min>= 600 minAfter mixing, 100 gram batch
Shelf Life 12.0 Month
@Temperature <=23.9 °C
12.0 Month
@Temperature <=75.0 °F
in original, unopened containers
 
Descriptive Properties
Mixing Ratio2:1 by weightParts A to B

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PMASTM846 / 185439

Metal adhesives

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