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Master Bond EP21LV-LO Two Component, Lower Viscosity, Room Temperature Curing Epoxy System

Category Polymer , Thermoset , Epoxy , Epoxy Encapsulant, Unreinforced
Manufacturer Master Bond Inc.
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Master Bond EP21LV-LO Two Component, Lower Viscosity, Room Temperature Curing Epoxy System.pdf
Price EMAIL US    sales@lookpolymers.com
  Online Service   lookpolymers   27660005
Material Notes:
Product Description: Master Bond EP21LV-LO is a two component, lower viscosity, room temperature curing epoxy system for high performance bonding, sealing, coating and encapsulation. This user friendly system has an easy and convenient one to one mix ratio by weight. EP21LV-LO features outstanding physical strength properties, along with being an excellent electrical insulator. This combination of properties enables it to be readily used as a potting and encapsulation compound. EP21LV-LO resists many chemicals including water, oils, fuels, acids, bases and salts quite well. It bonds well to a variety of substrates including metals, glass, ceramics and many types of rubber and many plastics. To optimize its properties, the best cure schedule is 12-24 hours at room temperature, plus another 2 hours at 150-200°F. Most importantly, EP21LV-LO passes NASA low outgassing specifications. The color of Part A is clear and Part B is amber in color. It is serviceable over the wide temperature range of -60°F to +250°F. This versatile system is widely used in aerospace, microelectronics, semiconductor, optical and vacuum applications. Product Advantages: Lower viscosity; convenient mixing; ideal for bonding, sealing, coating and encapsulation. Easily applied; adhesive spreads smoothly. High bonding strength to a wide variety of substrates. Excellent adhesion to similar and dissimilar substrates. Good electrical insulation properties. Superior durability, thermal shock and chemical resistance. Passes NASA low outgassing specifications.Information provided by MasterBond®
Physical Properties Metric English Comments
Viscosity 10000 - 14000 cP
10000 - 14000 cP
Part A
11000 - 15000 cP
11000 - 15000 cP
Part B
Mechanical Properties Metric English Comments
Hardness, Shore D >= 70
>= 70
Tensile Strength at Break >= 51.7 MPa

@Temperature 23.9 °C
>= 7500 psi

@Temperature 75.0 °F
Tensile Modulus 2.07 - 2.41 GPa

@Temperature 23.9 °C
300 - 350 ksi

@Temperature 75.0 °F
Shear Strength >= 19.3 MPa
>= 2800 psi
Al/Al, bond
Thermal Properties Metric English Comments
CTE, linear 50.0 - 55.0 µm/m-°C
27.8 - 30.6 µin/in-°F
Maximum Service Temperature, Air 121 °C
250 °F
Minimum Service Temperature, Air -53.9 °C
-65.0 °F
Electrical Properties Metric English Comments
Volume Resistivity >= 1.00e+15 ohm-cm
>= 1.00e+15 ohm-cm
Dielectric Constant 2.79

@Frequency 60.0 Hz
2.79

@Frequency 60.0 Hz
Dielectric Strength 17.3 kV/mm

@Thickness 3.17 mm
440 kV/in

@Thickness 0.125 in
Processing Properties Metric English Comments
Cure Time 120 - 180 min

@Temperature 93.3 °C
2.00 - 3.00 hour

@Temperature 200 °F
720 - 1440 min

@Temperature 23.9 °C
12.0 - 24.0 hour

@Temperature 75.0 °F
plus 2 hrs at 150-200°F
2880 - 4320 min

@Temperature 23.9 °C
48.0 - 72.0 hour

@Temperature 75.0 °F
Pot Life 60 - 90 min
60 - 90 min
100 gram mass
Shelf Life 12.0 Month

@Temperature 23.9 °C
12.0 Month

@Temperature 75.0 °F
in original unopened containers
Descriptive Properties Value Comments
Mixing Ratio (A to B) 1:1
by weight or volume
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