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Metal adhesives

Master Bond EP21TDCS-LO Two Component Silver Conductive Epoxy Adhesive
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Key Features:
  • High electrical conductivity
  • Low volume resistivity
  • Outstanding toughness
  • Withstands rigorous thermal cycling
  • Cryogenically serviceable
  • Passes ASTM 595 for NASA low outgassing
Product Description: Master Bond EP21TDCS-LO is a two component, silver filled, electrically conductive adhesive for high performance bonding and sealing formulated to cure at room temperature or more rapidly at elevated temperatures. Unlike the majority of two part silver conductive epoxy systems, EP21TDCS-LO has a one to one mix ratio by weight or volume. It readily develops a high bonding strength of more than 850 psi tensile shear and a T-peel strength of greater than 5 pli when measured and cured at 75°F. It is 100% reactive and does not contain any diluents or solvents. The volume resistivity of the cured system is less than 10-3 ohm-cm. EP21TDCS-LO can be applied with minimal sagging or dripping even on vertical surfaces. The high strength bonds are remarkably adaptable to thermal cycling and resistant to chemicals including water, oil and most organic solvents. EP21TDCS-LO operates over the exceptionally wide temperature range of 4K to +275°F enabling it to be serviceable even in cryogenic applications. Adhesion to metals, glass, ceramics, vulcanized rubbers and many plastics is excellent. Parts A and B are both colored silver. EP21TDCS-LO adhesive is widely used in the electronic, electrical, computer, semiconductor, microwave and appliance and industries, among others.

Product Advantages:

  • Convenient mixing: 1 to 1 by weight or volume
  • Contains no volatiles
  • Easy application: contact pressure only required for cure; adhesive spreads evenly and smoothly
  • Versatile cure schedules: ambient temperature cures or fast elevated temperature cures as required
  • High electrical conductivity
  • High bond strength to similar and dissimilar substrates
  • Superior durability, thermal shock and chemical resistance
  • Outstanding toughness; much less rigid than conventional silver epoxy
  • Passes NASA low outgassing testing

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 PropertiesMetricEnglishComments
Hardness, Shore D 50 - 6050 - 60
Adhesive Bond Strength >= 5.86 MPa>= 850 psiTensile lap, Aluminum to Aluminum
Peel Strength >= 0.877 kN/m>= 5.00 pli
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity <= 1000 ohm-cm<= 1000 ohm-cm
 
Thermal PropertiesMetricEnglishComments
Thermal Conductivity 1.5865 W/m-K11.010 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 135 °C275 °F
Minimum Service Temperature, Air -167 °C-269 °F
 
Processing PropertiesMetricEnglishComments
Cure Time  60.0 - 120 min
@Temperature 93.3 °C
1.00 - 2.00 hour
@Temperature 200 °F
 1440 - 2880 min
@Temperature 23.9 °C
24.0 - 48.0 hour
@Temperature 75.0 °F
Working Life 30.0 - 40.0 min30.0 - 40.0 minAfter mixing, 50 gram batch
Shelf Life 3.00 - 6.00 Month
@Temperature <=23.9 °C
3.00 - 6.00 Month
@Temperature <=75.0 °F
in original, unopened containers
 
Descriptive Properties
Mixing Ratio1:1 by weight or volumeParts A to B
Viscositypastemixed

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PMASTM838 / 185431

Metal adhesives

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