Master Bond EP40ND Two component epoxy

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Master Bond EP40ND Two component epoxy
Categories:	Polymer; Thermoset; Epoxy
Material Notes:	Key Features: Convenient handling Good bond strength in shear and peel modes Exceptional adhesion to polycarbonates and acrylics Meets NASA low outgassing Product Description: Master Bond EP40ND is a two part, room temperature curing epoxy for bonding, sealing, and coating. This non-drip system has a forgiving 1:1 mix ratio by weight or volume. It is formulated to cure readily at ambient temperatures or more rapidly at elevated temperatures. The optimum curing schedule is overnight at room temperature followed by 2-3 hours at 120°F to 150°F. EP40ND is 100% reactive and contains no solvents or diluents. EP40ND is a superb adhesive and bonds well to a variety of substrates including metals, ceramics, composites and plastics. It is most noteworthy for its affinity to bonding engineered plastics such as polycarbonates and acrylics. EP40ND is also capable of withstanding rigorous thermal cycling and shock. EP40ND is a reliable electrical insulator. It is a relatively low exothermic system and can be applied in thick sections. It withstands many common chemicals including water, oils, fuels, cleaning agents and some acids and bases. The color of Part A is translucent and Part B is amber. The service temperature range is -100°F to +250°F. There are many applications in electronics, opto-electronics and medical devices that utilize plastic substrates, which may be prone to stress cracking. It is important to select an adhesive that mitigates this possibility. EP40ND is an excellent candidate for these types of applications. Product Advantages: Convenient handling, 1:1 mix ratio Long open time Paste consistency Good lap shear and outstanding peel strength High elongation Highly compatible with bonding polycarbonates and acrylics Information provided by Master Bond.
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. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Metric	English	Comments

Viscosity	50000 - 100000 cP	50000 - 100000 cP	Part A

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	50 - 60	50 - 60
Tensile Strength	5.52 - 6.89 MPa	800 - 1000 psi
Elongation at Break	80 - 90 %	80 - 90 %
Tensile Modulus	0.00689 - 0.0103 GPa	1.00 - 1.50 ksi
Adhesive Bond Strength	11.0 - 12.4 MPa	1600 - 1800 psi	Tensile lap shear, Al to Al
Peel Strength	10.5 - 14.0 kN/m	60.0 - 80.0 pli	T-peel strength, steel to steel

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+15 ohm-cm	>= 1.00e+15 ohm-cm
Dielectric Constant	4.1 @Frequency 60 Hz	4.1 @Frequency 60 Hz

Thermal Properties	Metric	English	Comments
CTE, linear	55.0 - 60.0 µm/m-°C	30.6 - 33.3 µin/in-°F
Maximum Service Temperature, Air	121 °C	250 °F
Minimum Service Temperature, Air	-73.3 °C	-100 °F

Processing Properties	Metric	English	Comments
Cure Time	120 - 180 min @Temperature 48.9 - 65.6 °C	2.00 - 3.00 hour @Temperature 120 - 150 °F	Optimal: overnight at 75°F, plus 2-3 hours at 120-150°F
	2880 - 4320 min @Temperature 23.9 °C	48.0 - 72.0 hour @Temperature 75.0 °F	Option 2
Working Life	120 - 150 min	120 - 150 min	after mixing, 100 gram batch
Shelf Life	6.00 Month	6.00 Month	in syringes, in original, unopened containers
	12.0 Month	12.0 Month	in cans, in original, unopened containers

Descriptive Properties
Mixing ratio	1:1 by weight or volume		Part A to B
Viscosity	thixotropic paste		Part B

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PMASTM5921 / 306810

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