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Master Bond adhesives

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 PropertiesMetricEnglishComments
Viscosity  20 - 80 cP
@Temperature 23.9 °C
20 - 80 cP
@Temperature 75.0 °F
Part B
 50 - 200 cP
@Temperature 23.9 °C
50 - 200 cP
@Temperature 75.0 °F
mixed compound
 100 - 500 cP
@Temperature 23.9 °C
100 - 500 cP
@Temperature 75.0 °F
Part A
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D >= 85>= 85
Tensile Strength at Break >= 75.8 MPa>= 11000 psi
Elongation at Break <= 3 %<= 3 %
Tensile Modulus  >= 2.07 GPa
@Temperature 149 °C
>= 300 ksi
@Temperature 300 °F
 >= 2.76 GPa
@Temperature 23.9 °C
>= 400 ksi
@Temperature 75.0 °F
Compressive Strength >= 138 MPa>= 20000 psi
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity  >= 1.00e+10 ohm-cm
@Temperature 150 °C
>= 1.00e+10 ohm-cm
@Temperature 302 °F
 >= 1.00e+12 ohm-cm
@Temperature 100 °C
>= 1.00e+12 ohm-cm
@Temperature 212 °F
 >= 1.00e+14 ohm-cm
@Temperature 25.0 °C
>= 1.00e+14 ohm-cm
@Temperature 77.0 °F
Dielectric Constant  3.1
@Frequency 60 Hz,
Temperature 25.0 °C
3.1
@Frequency 60 Hz,
Temperature 77.0 °F
 3.2
@Frequency 60 Hz,
Temperature 100 °C
3.2
@Frequency 60 Hz,
Temperature 212 °F
 3.2
@Frequency 1e+6 Hz,
Temperature 25.0 °C
3.2
@Frequency 1e+6 Hz,
Temperature 77.0 °F
 3.3
@Frequency 1000 Hz,
Temperature 25.0 °C
3.3
@Frequency 1000 Hz,
Temperature 77.0 °F
 3.4
@Frequency 1000 Hz,
Temperature 100 °C
3.4
@Frequency 1000 Hz,
Temperature 212 °F
 3.4
@Frequency 1e+6 Hz,
Temperature 100 °C
3.4
@Frequency 1e+6 Hz,
Temperature 212 °F
 3.6
@Frequency 1e+6 Hz,
Temperature 150 °C
3.6
@Frequency 1e+6 Hz,
Temperature 302 °F
 3.7
@Frequency 60 Hz,
Temperature 150 °C
3.7
@Frequency 60 Hz,
Temperature 302 °F
 4.0
@Frequency 1000 Hz,
Temperature 150 °C
4.0
@Frequency 1000 Hz,
Temperature 302 °F
Dissipation Factor  0.0030
@Frequency 60 Hz,
Temperature 100 °C
0.0030
@Frequency 60 Hz,
Temperature 212 °F
 0.0030
@Frequency 60 Hz,
Temperature 150 °C
0.0030
@Frequency 60 Hz,
Temperature 302 °F
 0.0040
@Frequency 1000 Hz,
Temperature 100 °C
0.0040
@Frequency 1000 Hz,
Temperature 212 °F
 0.0050
@Frequency 60 Hz,
Temperature 25.0 °C
0.0050
@Frequency 60 Hz,
Temperature 77.0 °F
 0.0070
@Frequency 1000 Hz,
Temperature 25.0 °C
0.0070
@Frequency 1000 Hz,
Temperature 77.0 °F
 0.013
@Frequency 1e+6 Hz,
Temperature 25.0 °C
0.013
@Frequency 1e+6 Hz,
Temperature 77.0 °F
 0.015
@Frequency 1e+6 Hz,
Temperature 100 °C
0.015
@Frequency 1e+6 Hz,
Temperature 212 °F
 0.020
@Frequency 1e+6 Hz,
Temperature 150 °C
0.020
@Frequency 1e+6 Hz,
Temperature 302 °F
 0.070
@Frequency 1000 Hz,
Temperature 150 °C
0.070
@Frequency 1000 Hz,
Temperature 302 °F
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 232 °C450 °F
Minimum Service Temperature, Air -51.1 °C-60.0 °F
 
Optical PropertiesMetricEnglishComments
Refractive Index 1.551.55
 
Processing PropertiesMetricEnglishComments
Cure Time  60.0 - 120 min
@Temperature 93.3 - 98.9 °C
1.00 - 2.00 hour
@Temperature 200 - 210 °F
first
 180 - 240 min
@Temperature 121 °C
3.00 - 4.00 hour
@Temperature 250 °F
second, Post Curing 350°F
Pot Life 2880 - 4320 min
@Temperature 23.9 °C
2880 - 4320 min
@Temperature 75.0 °F
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 Ratio (A to B)100:80by weight

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PMASTB301 / 149548

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