RBC-3910 epoxy system is a filled version of the RBC-3900 that offers higher thermal conductivity and improved electrical properties. It is relatively low in viscosity and its mix ratio of 1:1 adds to its convenient handling properties. Like RBC-3900, it is an epoxy system primarily designed for epoxy potting electrical and electronic components.
Mixed Viscosity @ 25oC, cps: 5,000
Shelf Life, (closed Container @ 25oC): 12 months
Color: Black
Specific Gravity @ 25oC: 1.60
Hardness, Shore D: 85
Linear Shrinkage, in./in.: 0.001
Moisture Absorption 10 Days @ 25oC, %: 0.01
Izod Impact Strength, ft. lbs./in. of notch: 0.65
Tensile Strength @ 25oC, psi: 12,500
Compressive Strength @ 25oC, psi: 20,900
Thermal Conductivity, cal/sec/cm2/oC/cm X 10-4: 8.2
Thermal Stability, 1000 Hrs. @ 175oC, % Wt. Loss: 2.1
Coefficient of Thermal Expansion, in./in./oC X 10-6: 38
Heat Distortion Temperature, oC: 85
Operating Temperature Range, oC: -65 to 140
Volume Resistivity @ 25oC, ohm-cm: 9×1014
Dielectric Strength, volts/mil: 485
Dielectric Constant @ 25oC, 100 KC: 4.4
Dissipation Factor @ 25oC, 100 KC: 0.055
Weigh the desired amount of #3910 Epoxy Resin into a clean container and combine with recommended amount of #3910 Epoxy Hardener. Mix thoroughly. Entrapped air may be removed by vacuum.
| Mix Ratio by Weight or Volume | 100 parts resin to 100 parts hardener | Cure Time |
| Pot Life | @ 25oC | 50-60 minutes |
| @ 25oC | 72 hours | |
| @ 65oC | 1-2 hours |
