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Metal adhesives

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Master Bond EP126TK Two part non-drip epoxy
Categories: Polymer; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Key Features:
  • Excellent glass transition temperature, +240°C
  • Noteworthy bonding strength
  • Outstanding chemical resistance
  • Top notch machinability
Master Bond EP126TK is a specialty type two part epoxy that excels in high temperature applications up to +600°F. It has an impressive glass transition temperature of around +240°C. EP126TK has slightly different handling properties when compared to other epoxies, but ultimately, is easily processable. With this compound, Part A is a paste and Part B is a powder. To process, Part A is first heated to 150-160°F. Then Part B is added and stirred, based on a forgiving 100 to 50 mix ratio by weight. The mixed system is a malleable paste, with an exceedingly long open time, that can be easily applied to the substrates. The curing is straightforward; 3-4 hours at 300°F or 2-3 hours at 350°F. For optimum properties, post curing for 12-24 hours at 400-450°F is recommended. EP126TK will not flow while curing. EP126TK bonds well to a wide variety of substrates, including metals, composites, glass, ceramics, rubbers and many plastics. Additionally, it is formulated as a toughened system allowing it to withstand rigorous thermal cycling. The epoxy system offers enhanced tensile lap shear strength, fine dimensional stability, strikingly high compressive strength along with low shrinkage upon curing. EP126TK is a very good electrical insulator, especially as it retains highly insulative properties at elevated temperatures. Furthermore, it has superb chemical resistance to water, oils, acids, bases and many solvents. EP126TK should be considered for the most demanding electronic, aerospace, optical and OEM applications based on this solid performance profile.

Product Advantages:

  • Excellent long-term thermal stability
  • Dimensionally stable and machinable
  • 100% reactive—no solvents or other volatiles
  • High adhesion to metallic and non-metallic substrates
  • Robust physical strength profile especially in the compressive mode

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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Mechanical PropertiesOriginal ValueComments
Tensile Strength 3500 - 4000 psi
Tensile Modulus 200000 - 250000 psi
@Temperature 260 °C
 425000 - 475000 psi
@Temperature 23.9 °C
Flexural Strength 2500 - 3000 psi
@Temperature >=260 °C
 8000 - 9000 psi
@Temperature >=23.9 °C
Compressive Strength 32000 - 34000 psi
Adhesive Bond Strength 1300 - 1400 psi
@Temperature 260 °C
Tensile Lap Shear; Al/Al
 >= 2800 psi
@Temperature 23.9 °C
Tensile Lap Shear; Al/Al
 1100 - 1200 psi
@Treatment Temp. 260 °C,
Time 3.60e+6 sec
Tensile lap, aged
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+11 ohm-cm
@Temperature 260 °C
 >= 1.00e+14 ohm-cm
@Temperature 23.9 °C
Dielectric Constant 3.9
@Frequency 60 Hz,
Temperature 23.9 °C
 4.8
@Frequency 60 Hz,
Temperature 260 °C
Dissipation Factor 0.034
@Frequency 60 Hz,
Temperature 260 °C
 0.091
@Frequency 60 Hz,
Temperature 23.9 °C
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 316 °C
Minimum Service Temperature, Air -62.0 °C
Glass Transition Temp, Tg 240 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 2.00 - 3.00 hour
@Temperature 177 °C
Option 2
 3.00 - 4.00 hour
@Temperature 149 °C
Option 1
 12.0 - 24.0 hour
@Temperature 204 - 232 °C
Post cure
Working Life >= 7200 min
@Temperature 23.9 °C
After mixing, 100 gram batch
Shelf Life 6.00 Month
 
Descriptive Properties
Mixing ratio100:50 by weight
ViscositypasteMixed
 powderPart B
 thixotropic pastePart A

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PMASTM617 / 249013

Metal adhesives

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