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Metal adhesives

Master Bond EP21NDCL Two Part Epoxy
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Key Features:
  • Room temperature curing system
  • User friendly processing
  • Non-flowing paste
  • Cures optically clear in thin sections
  • Exceptional physical and electrical properties
  • Adjustable mix ratio
Product Description: Master Bond EP21NDCL is a two component, room temperature curing epoxy system that has a non-drip consistency. What is really eye-catching about this product is that even though Part A is translucent and Part B is light amber, upon mixing it cures optically clear, especially in thin sections. EP21NDCL combines easy processing, outstanding physical strength properties along with excellent electrical insulation values. The processing is straightforward and relatively easy; the mix ratio is a non-critical 1 to 1 by weight or volume. In fact, it can be mixed 2 to 1 so that it cures more rigid or 1 to 2 to effect a more flexible cure. EP21NDCL produces high strength, durable bonds which hold up well to thermal cycling and resist many chemicals including water, oils, fuels, acids, bases and salts. It bonds well to a variety of substrates including metals, composites, glass, ceramics and many types of rubbers and plastics (most notably acrylics and polycarbonates). It is serviceable over the wide temperature range of -60°F to +250°F. This exceptionally versatile system can be effectively utilized in optical, opto-electronic, electrical, aerospace and specialty OEM industries where an optically clear, non-drip epoxy is desirable.

Product Advantages:

  • Easy to work with and use
  • Long open time; paste consistency
  • High bond strength to many different substrates
  • Superior physical strength profile
  • High quality optical clarity especially in thin sections

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 70 - 8070 - 80
Tensile Strength 44.8 - 51.7 MPa6500 - 7500 psi
Elongation at Break 5.0 - 10 %5.0 - 10 %
Tensile Modulus 2.41 - 2.76 GPa350 - 400 ksi
Compressive Strength 82.7 - 89.6 MPa12000 - 13000 psi
Adhesive Bond Strength 17.9 - 19.3 MPa2600 - 2800 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+14 ohm-cm>= 1.00e+14 ohm-cm
Dielectric Constant 2.92
@Frequency 60 Hz
2.92
@Frequency 60 Hz
 
Thermal PropertiesMetricEnglishComments
CTE, linear 40.0 - 45.0 µm/m-°C22.2 - 25.0 µin/in-°F
Maximum Service Temperature, Air 121 °C250 °F
Minimum Service Temperature, Air -51.1 °C-60.0 °F
 
Processing PropertiesMetricEnglishComments
Cure Time  120 - 180 min
@Temperature 93.3 °C
2.00 - 3.00 hour
@Temperature 200 °F
 720 - 1440 min
@Temperature 23.9 °C
12.0 - 24.0 hour
@Temperature 75.0 °F
plus 2 hrs at 150-200°F, Optimal cure
 2880 - 4320 min
@Temperature 23.9 °C
48.0 - 72.0 hour
@Temperature 75.0 °F
Working Life 90.0 - 120 min90.0 - 120 minAfter mixing, 100 g batch
Shelf Life 12.0 Month
@Temperature <=23.9 °C
12.0 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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PMASTM829 / 185422

Metal adhesives

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