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Metal adhesives

Resinlab® EP1121 Clear Electronic Grade Epoxy Encapsulant
Categories: Polymer; Thermoset; Epoxy; Epoxy Encapsulant, Unreinforced

Material Notes: Resinlab™ EP1121 Clear is a two part unfilled electronic grade epoxy encapsulant designed for small to medium sized castings. It cures completely at room temperature to a tough, flexible polymer. Its low viscosity allows for good wicking and penetration into components and circuitry and also gives good air release. It has very good resistance to water, acids and bases and most organic solvents. Thermal shock and cycling properties are also enhanced by its high elongation giving it the ability to absorb difference in CTE's of substrates. It was especially formulated to a 1A:1B volume mix ratio for use in side-by-side dispensing cartridges and meter/mix and dispense equipment. EP1121 Clear will reach full cure at room temperature within 24 to 48 hours. Cure time can be accelerated by the application of heat after product has gelled. Times and temperatures from 1 hour at 65°C to 10 minutes at 100°C are typical for small castings (less than 50 grams).

Information Provided by Resinlab L.L.C., an Ellsworth Adhesives Company.

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Physical PropertiesMetricEnglishComments
Specific Gravity 0.970 g/cc0.970 g/ccPart B; TM R050-16
 1.05 g/cc1.05 g/ccMixed; TM R050-16
 1.12 g/cc1.12 g/ccPart A; TM R050-16
Water Absorption 0.49 %
@Time 86400 sec
0.49 %
@Time 24.0 hour
TM R050-35
Viscosity 2000 cP2000 cPPart B, RVT, #5, 20 rpm; TM R050-12
 2200 cP2200 cPMixed; TM R050-12
 2400 cP2400 cPPart A, RVT, #5, 20 rpm; TM R050-12
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 4040TM R050-17
Tensile Strength at Break 2.76 MPa400 psiTM R050-36
Tensile Strength, Ultimate 2.76 MPa400 psiTM R050-36
Tensile Strength, Yield 0.689 MPa100 psiTM R050-36
Elongation at Break 40 - 50 %40 - 50 %TM R050-36
Tensile Modulus 0.0138 GPa2.00 ksiTM R050-36
Compressive Yield Strength 5.17 MPa750 psiTM R050-38
Compressive Strength 51.7 MPa7500 psiUltimate; TM R050-38
 51.7 MPa7500 psiBreak; TM R050-38
Compressive Modulus 0.0345 GPa5.00 ksiTM R050-38
Adhesive Bond Strength 6.89 MPa1000 psiLap shear; 2024 T3 Al Abraded / MEK Wipe; TM R050-37
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 8.00e+14 ohm-cm8.00e+14 ohm-cm
Dielectric Constant 4.2
@Frequency 100 Hz,
Temperature 25.0 °C
4.2
@Frequency 100 Hz,
Temperature 77.0 °F
Dielectric Strength 17.3 kV/mm440 kV/in
 
Thermal PropertiesMetricEnglishComments
CTE, linear 60.0 µm/m-°C33.3 µin/in-°F
Thermal Conductivity 0.140 W/m-K0.972 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air 150 °C302 °F
Minimum Service Temperature, Air -40.0 °C-40.0 °F
Glass Transition Temp, Tg 27.0 °C80.6 °FTM R050-25
 
Optical PropertiesMetricEnglishComments
Transmission, Visible 90 %90 %clear; thickness not quantified
 
Processing PropertiesMetricEnglishComments
Pot Life 60 - 90 min60 - 90 minMass: 50g; TM R050-19
 
Descriptive Properties
ColorClear
Mix Ratio1:1Volume
 100:85Weight

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Metal adhesives

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