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Metal adhesives

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Master Bond EP29LPSP Low Outgassing, Optically Clear Two Component Epoxy
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Key Features:
  • NASA low outgassing approved
  • Optically clear
  • Electrically insulative
  • Serviceable at cryogenic temperatures down to 4K
  • Withstands cryogenic shock
  • Low mixed viscosity
Product Description: Master Bond Polymer System EP29LPSP is a two component, high performance, modified low temperature heat cured epoxy system specially formulated for cryogenic applications. EP29LPSP is serviceable at temperatures as low as 4K as an adhesive, sealant and protective coating, but more importantly, it is able to withstand cryogenic shocks (i.e. room temperature down to liquid helium temperatures in a 5-10 minute time period). This optically clear, low viscosity epoxy bonds well to a wide variety of substrates including metals, glass, ceramics, composites and many different plastics. The working life is long; a 100 gram mass will allow over 4-5 hours of working life. EP29LPSP has superior electrical insulation properties and a good chemical resistance profile. EP29LPSP requires gelling the mixed epoxy at room temperature, followed by alternative lower elevated temperature cure cycles (8-10 hours at 130-150°F) or (5-7 hours at 175°F) or (3-5 hours at 200°F). EP29LPSP is widely used in applications requiring cryogenic service, optical clarity and NASA low outgassing properties.

Product Advantages:

  • Exceptionally low mixed viscosity and low exotherm; contains no solvents or other volatiles
  • Long working life at ambient temperatures
  • Superior physical strength and electrical insulation properties
  • High bonding strength to a wide variety of substrates
  • Excellent chemical resistance to acids, bases and many solvents
  • Outstanding track record for cryogenic serviceability

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 10 - 70 cPPart B
 500 - 1500 cPmixed
 10000 - 16000 cPPart A
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D >= 65
Tensile Strength >= 8000 psi
Tensile Modulus >= 400000 psi
Adhesive Bond Strength >= 2200 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesOriginal ValueComments
Volume Resistivity >= 1.00e+15 ohm-cm
Dielectric Constant 3.95
@Frequency 60 Hz
 
Thermal PropertiesOriginal ValueComments
CTE, linear 45.0 - 55.0 µm/m-°C
Maximum Service Temperature, Air 275 °F
Minimum Service Temperature, Air -269 °F
 
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 240 - 300 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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PMASTM848 / 185441

Metal adhesives

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