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Chemically Resistant adhesives

Master Bond EP21ANHT Two Component, Room Temperature Curing Epoxy Adhesive
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: Product Description: Master Bond Polymer Adhesive EP21ANHT is a two component room temperature curing adhesive, sealant and coating that combines high thermal conductivity and electrical insulation properties, along with elevated temperature resistance. It has a forgiving one to one mix ratio by weight or volume. Although the system cures at room temperature, its physical properties are optimized by a post cure at 150°F for 2-3 hours. EP21ANHT adheres well to a wide variety of substrates including metals glass and many plastics. Its tensile shear strength exceeds 1,100 psi, enabling it to be used in many applications where high strength bonds are required. Other features include superior dimensional stability and a long working life. EP21ANHT offers good resistance to a wide range of chemicals including water, oil, fuels, and various solvents over the temperature range of -60°F to +400°F. The color of Part A is light gray; Part B is gray in color. EP21ANHT is widely used in electronic, electrooptical and related industries where excellent heat transfer and electrical insulation are required.

Product Advantages:

  • Convenient mixing: non-critical equal weight or volume ratio.
  • Long working life.
  • Easy application: contact pressure only required for cure; adhesive spreads evenly.
  • Low coefficient of expansion, low shrinkage, superb dimensional stability.
  • Versatile cure schedules: ambient temperature cures or fast elevated temperature cures as required.
  • High bonding strength to a wide variety of substrates.
  • Good durability, thermal shock and chemical resistance.
  • Great thermal conductivity; excellent electrical insulation 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 50000 - 110000 cP50000 - 110000 cPPart B
 200000 - 600000 cP200000 - 600000 cPPart A
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D >= 85>= 85
Tensile Strength at Break 34.5 MPa
@Temperature 23.9 °C
5000 psi
@Temperature 75.0 °F
Tensile Modulus >= 3.45 GPa
@Temperature 23.9 °C
>= 500 ksi
@Temperature 75.0 °F
Shear Strength >= 7.58 MPa>= 1100 psiAl/Al, tensile
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+13 ohm-cm>= 1.00e+13 ohm-cm
Dielectric Constant 4.9
@Frequency 60 Hz,
Temperature 25.0 °C
4.9
@Frequency 60 Hz,
Temperature 77.0 °F
Dielectric Strength >= 15.7 kV/mm
@Thickness 3.17 mm
>= 400 kV/in
@Thickness 0.125 in
 
Thermal PropertiesMetricEnglishComments
CTE, linear 22.0 - 25.0 µm/m-°C12.2 - 13.9 µin/in-°F
Thermal Conductivity 3.17 - 3.46 W/m-K22.0 - 24.0 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 204 °C400 °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
 2880 - 4320 min
@Temperature 23.9 °C
48.0 - 72.0 hour
@Temperature 75.0 °F
Pot Life >= 90 min>= 90 min100 gram mass
Shelf Life 6.00 Month
@Temperature 23.9 °C
6.00 Month
@Temperature 75.0 °F
in original, unopened containers
 
Descriptive Properties
Mixing Ratio (A to B)1:1by weight or volume

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PMASTB306 / 149553

Chemically Resistant adhesives

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