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Metal adhesives

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Master Bond EP29LPSPAO-1 Black Two Component Epoxy
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Key Features:
  • Good flow properties
  • Can withstand cryogenic shock
  • High dimensional stability
  • Vacuum compatible
Product Description: Master Bond EP29LPSPAO-1 Black is a two component, thermally conductive, electrically insulating epoxy system for bonding, coating, sealing and potting. It has a forgiving 100 to 65 mix ratio by weight. After mixing, this epoxy is a smooth, free-flowing, thixotropic type system. It has very low exotherm and a long open time. Most significantly, it is a special formulation designed for cryogenic applications. It is even able to withstand rapid excursions down to these low temperatures. It performs well even when temperatures go down to 4K in 5-10 minutes. After mixing, EP29LPSPAO-1 Black is cured for 12-24 hours at room temperature, followed by heating. The options for the heat curing portion of the schedule are summarized in the table below. The epoxy has very low shrinkage upon curing and after cure, it is highly dimensionally stable. EP29LPSPAO-1 Black bonds well to a wide variety of substrates including metals, glass, ceramics and composites. The combination of good flow, thermal conduction and electrical isolation, enable it to be useful in potting and encapsulating applications. The color of Part A is black and Part B is off white. The service temperature range is from 4K to +250°F. This epoxy has a good resistance to water, oils and hydraulic fluids as well as some acids and bases. This epoxy is particularly useful in aerospace, optical, electronic, specialty OEM and other applications where cryogenic serviceability and the other special product properties mentioned above are desirable.

Product Advantages:

  • Low viscosity and good flow properties
  • Low exotherm; long working life
  • Serviceable down to 4K
  • Can withstand cryogenic shocks
  • Good thermal conductivity while retaining electrical Insulation
  • Complies with NASA low outgassing specifications

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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Physical PropertiesOriginal ValueComments
Viscosity 4000 - 15000 cPmixed
 2500 - 20000 cPPart B
 55000 - 75000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 80 - 85
Tensile Strength 4500 - 5500 psi
Tensile Modulus 450000 - 500000 psi
Adhesive Bond Strength 900 - 1100 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+15 ohm-cm
Dielectric Constant 4.35
@Frequency 60 Hz
 
Thermal PropertiesOriginal ValueComments
CTE, linear 22.0 - 25.0 µm/m-°C
Thermal Conductivity 1.30 - 1.44 W/m-K
Maximum Service Temperature, Air 250 °F
Minimum Service Temperature, Air -269 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 3.00 - 5.00 hour
@Temperature 93.3 °C
 5.00 - 7.00 hour
@Temperature 79.4 °C
 8.00 - 10.0 hour
@Temperature 54.4 - 65.6 °C
Working Life 300 - 480 minAfter mixing, 100 gram batch
Shelf Life 6.00 Month
@Temperature <=23.9 °C
in original, unopened containers
 
Descriptive Properties
Mixing Ratio100:65 by weightParts A to B

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PMASTM849 / 185442

Metal adhesives

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