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USP Class VI Adhesives
USP Class VI Approved Adhesives for Medical Device Applications
Master Bond’s biocompatible adhesives are designed to meet the needs of medical device manufacturers. Compounds withstand various types of sterilization methods.

Master Bond EP41SMed Two Component, Low Viscosity, USP Class VI Epoxy System
Categories: Polymer; Adhesive; Thermoset; Epoxy; Epoxy Adhesive

Material Notes: Key Features:
  • Very fast curing; quick handling time
  • Highly resistant to chemical sterilants
  • Excellent physical strength properties
  • Outstanding electrical insulation properties
Product Description: Master Bond EP41SMed is a two component epoxy system that combines swift curing along with impressive chemical resistance, particularly to sterilants used in medical applications. EP41SMed is certified to meet USP Class VI test specifications. This lower viscosity system has a 100 to 20 non-critical mix ratio by weight. It sets up quickly after mixing and typically can be removed from a fixture in 40-50 minutes. It cures in 24 hours at 75°F, in 60-90 minutes at 200°F. To obtain optimum properties, curing overnight at 75°F followed by 1-2 hours at 150-200°F is recommended. As noted above, EP41SMed has sterling chemical resistance. Typically, faster curing epoxies are somewhat less chemically resistant than other types of systems. However, EP41SMed excels at withstanding many chemical steriliants, including ethylene oxide, bleach, glutaraldehyde, hydrogen peroxide based systems and peracetic acid type compounds, among others. EP41SMed is 100% reactive and does not contain any diluents or solvents. It bonds well to a wide variety of substrates including metals, composites, ceramics and glass along with many plastic and rubber materials. EP41SMed is a highly reliable electrical insulator and is particularly well suited for use in small sized potting applications. Most importantly, it has minimal shrinkage upon curing. The color of Part A is clear and Part B is amber. The service temperature range is -60°F to +250°F. EP41SMed is highly desirable in medical device manufacturing for both disposable and reusable instruments, particularly when convenient handling, faster curing times and superior chemical resistance are significant.

Product Advantages:

  • Non-critical mix ratio of 100 to 20 mix ratio by weight
  • Very fast curing at ambient temperatures; relatively short fixture times
  • Easy to apply, especially by brushing or rolling
  • Top notch chemical resistance, particularly to most liquid sterilization materials
  • High bonding strength to many different substrates
  • Biocompatible as per USP Class VI 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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Physical PropertiesMetricEnglishComments
Viscosity 3000 - 5000 cP3000 - 5000 cP
 10000 - 15000 cP10000 - 15000 cP
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D >= 75>= 75
Tensile Strength 55.2 - 62.1 MPa8000 - 9000 psi
Tensile Modulus 2.07 - 2.41 GPa300 - 350 ksi
Adhesive Bond Strength >= 17.2 MPa>= 2500 psiTensile lap, Aluminum to Aluminum
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity >= 1.00e+14 ohm-cm>= 1.00e+14 ohm-cm
Dielectric Constant 3.63.6
 
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  60.0 - 90.0 min
@Temperature 93.3 °C
1.00 - 1.50 hour
@Temperature 200 °F
 1440 min
@Temperature 23.9 °C
24.0 hour
@Temperature 75.0 °F
Working Life 15.0 - 20.0 min15.0 - 20.0 minAfter mixing, 100 g batch
Shelf Life 6.00 Month
@Temperature <=23.9 °C
6.00 Month
@Temperature <=75.0 °F
in original, unopened containers
 
Compliance PropertiesMetricEnglishComments
USP Class VI YesYes
 
Descriptive Properties
Cure Scheduleovernight at 75°Fplus 1-2 hours at 150-200°F
Mixing Ratio100:20 by weightParts A to B

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PMASTM880 / 185473

USP Class VI adhesives

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