RBC-3700 System is a semi-flexible, unfilled epoxy system, most often used as an epoxy potting compound. RBC-3700 offers excellent shock resistance and electrical properties and its low viscosity and long pot life lend to its excellent handling properties. RBC-3700 is an elevated cure system which makes it an excellent impregnating, potting and encapsulating system for transformers, coils, and other components requiring excellent physical shock resistance.
Mixed Viscosity @ 25oC, cps: 4,500
Shelf Life, (closed Container @ 25oC): 12 months
Color: Translucent
Specific Gravity @ 25oC: 1.07
Hardness, Shore D: 60
Linear Shrinkage, in./in.: 0.010
Moisture Absorption 10 Days @ 25oC, %: 0.50
Izod Impact Strength, ft. lbs./in. of notch: 1.24
Tensile Strength @ 25oC, psi: 7,000
Compressive Strength @ 25oC, psi: 13,000
Thermal Conductivity, cal/sec/cm2/oC/cm X 10-4: 5.8
Thermal Stability, 1000 Hrs. @ 175oC, % Wt. Loss: 0.40
Coefficient of Thermal Expansion, in./in./oC X 10-6: 55
Heat Distortion Temperature, oC: 40
Operating Temperature Range, oC: -65 to 155
Volume Resistivity @ 25oC, ohm-cm: 6×1016
Dielectric Strength, volts/mil: 475
Dielectric Constant @ 25oC, 100 KC: 4.10
Dissipation Factor @ 25oC, 100 KC: 0.008
Weigh the desired amount of #3700 epoxy resin into a clean container and combine with recommended amount of #3700 epoxy hardener. Mix thoroughly. Entrapped air may be removed by vacuum.
| Mix Ratio by Weight | 100 parts resin to 165 parts hardener | |
| Pot Life | @ 25oC | 3 weeks |
| @ 65oC | 12 hours | |
| @ 100oC | 30 minutes |
| Cure Time | @ 60oC | 24 hours |
| @ 100oC | 2-3 hours |
