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Master Bond adhesives

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Master Bond EP112LS Two part, heat curing epoxy for potting, encapsulation, coating, sealing and impregnation
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: Master Bond EP112LS is a low viscosity two component epoxy resin system for potting, encapsulation, sealing, coating and impregnation. The mix ratio is an easy to use 100:80 by weight. EP112LS offers an long open time of 2-3 days or longer. It does require oven curing for a number of hours. A typical cure schedule would be 1-2 hours at 200-210°F followed by 3-4 hours at 250°F and then 4-6 hours at 300°F. Post curing at 350°F will further enhance product properties. Some of the more noteworthy attributes of EP112LS are good electrical insulation properties, physical strength values as well as optical clarity. It bonds very well to a wide variety of substrates, including glass fibers and ceramics, along with metals, composites, glass and many rubbers and plastics. It features good resistance to a variety of chemicals, including water, oils, fuels, acids and bases. EP112LS is serviceable over the wide temperature range of -60°F to +450°F. It is used for potting, sealing, coating and encapsulation applications as well as for impregnating especially when non-yellowing is an important consideration. This is a common issue in electronic, aerospace and opto-electronic environments. Another feature is its ability to retain its electrical insulation profile over a wide temperature range. Even though the cure schedule is somewhat long, EP112LS is a “go to” material for epoxy applications where superior non-yellowing properties are needed.

Product Advantages:

  • Low viscosity, long working life at ambient temperatures; very low exotherm
  • Good physical strength properties. Solid dimensional stability
  • Good electrical insulation characteristics
  • Great adhesion to similar and dissimilar substrates
  • Thermal stability, service temperature range -60°F to +450°F
  • Ideal for impregnation applications
  • Excellent optical clarity and non-yellowing properties

Information provided by MasterBond®

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 20 - 80 cP
@Temperature 23.9 °C
Part B
 50 - 200 cP
@Temperature 23.9 °C
mixed compound
 100 - 500 cP
@Temperature 23.9 °C
Part A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D >= 85
Tensile Strength at Break >= 11000 psi
Elongation at Break <= 3 %
Tensile Modulus >= 300000 psi
@Temperature 149 °C
 >= 400000 psi
@Temperature 23.9 °C
Compressive Strength >= 20000 psi
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+10 ohm-cm
@Temperature 150 °C
 >= 1.00e+12 ohm-cm
@Temperature 100 °C
 >= 1.00e+14 ohm-cm
@Temperature 25.0 °C
Dielectric Constant 3.1
@Frequency 60 Hz,
Temperature 25.0 °C
 3.2
@Frequency 60 Hz,
Temperature 100 °C
 3.2
@Frequency 1e+6 Hz,
Temperature 25.0 °C
 3.3
@Frequency 1000 Hz,
Temperature 25.0 °C
 3.4
@Frequency 1000 Hz,
Temperature 100 °C
 3.4
@Frequency 1e+6 Hz,
Temperature 100 °C
 3.6
@Frequency 1e+6 Hz,
Temperature 150 °C
 3.7
@Frequency 60 Hz,
Temperature 150 °C
 4.0
@Frequency 1000 Hz,
Temperature 150 °C
Dissipation Factor 0.0030
@Frequency 60 Hz,
Temperature 100 °C
 0.0030
@Frequency 60 Hz,
Temperature 150 °C
 0.0040
@Frequency 1000 Hz,
Temperature 100 °C
 0.0050
@Frequency 60 Hz,
Temperature 25.0 °C
 0.0070
@Frequency 1000 Hz,
Temperature 25.0 °C
 0.013
@Frequency 1e+6 Hz,
Temperature 25.0 °C
 0.015
@Frequency 1e+6 Hz,
Temperature 100 °C
 0.020
@Frequency 1e+6 Hz,
Temperature 150 °C
 0.070
@Frequency 1000 Hz,
Temperature 150 °C
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 450 °F
Minimum Service Temperature, Air -60.0 °F
 
Optical PropertiesOriginal ValueComments
Refractive Index 1.55
 
Processing PropertiesOriginal ValueComments
Cure Time 1.00 - 2.00 hour
@Temperature 93.3 - 98.9 °C
first
 3.00 - 4.00 hour
@Temperature 121 °C
second, Post Curing 350°F
Pot Life 2880 - 4320 min
@Temperature 23.9 °C
100 gram batch
Shelf Life 12.0 Month
@Temperature 23.9 °C
in original unopened containers
 
Descriptive Properties
Mixing Ratio (A to B)100:80by weight

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PMASTB301 / 149548

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