RBC-3900 is a low viscostiy epoxy system designed for potting and encapsulating electrical and electronic components. It offers excellent moisture resistance, convenient mix ratio of 1:1, very low viscosity and excellent thermal shock characteristics. | HANDLING PROPERTIES: | Mixed Viscosity @ 25oC, cps
Shelf Life, (closed Container @ 25oC) | 1,000
12 months | | PHYSICAL PROPERTIES (CURED): | Color
Specific Gravity @ 25oC
Hardness, Shore D
Linear Shrinkage, in./in.
Moisture Absorption 10 Days @ 25oC, %
Izod Impact Strength, ft. lbs./in. of notch
Tensile Strength @ 25oC, psi
Compressive Strength @ 25oC, psi | Black
1.14
83
0.002
0.02
0.60
6,550
18,900 | | THERMAL PROPERTIES (CURED): | Thermal Conductivity, cal/sec/cm2/oC/cm X 10-4
Thermal Stability, 1000 Hrs. @ 175oC, % Wt. Loss
Coefficient of Thermal Expansion, in./in./oC X 10-6
Heat Distortion Temperature, oC
Operating Temperature Range, oC | 5.0
4.8
62
70
-50 to 130 | | ELECTRICAL PROPERTIES (CURED): | Volume Resistivity @ 25oC, ohm-cm
Dielectric Strength, volts/mil
Dielectric Constant @ 25oC, 100 KC
Dissipation Factor @ 25oC, 100 KC | 8x1012
475
4.10
0.055 |
MIXING INSTRUCTIONS:
Weigh the desired amount of #3900 Epoxy Resin into a clean container and combine with recommended amount of #3900 Epoxy Hardener. Mix thoroughly. Entrapped air may be removed by vacuum.
RECOMMENDED CURE SCHEDULE:
| | | | | Mix Ratio by weight: | 100 parts resin to 100 parts hardener | | Mix Ratio by volume: | 100 parts resin to 100 parts hardener |
| | Pot Life @ 25oC: | 50-60 MINS. |
| | Cure Time | @ 25oC | 72 HRS. | | | @ 65oC | 1-2 HRS. | | | @ 100oC | 30 MINS. |
ADDITIONAL PUBLICATIONS: RBC-3900 Resin Material Safety Data Sheet (MSDS) RBC-3900 Hardener Material Safety Data Sheet (MSDS) |
