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RBC- 4500 Technical Data Sheet

Type:  Electronics  
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RBC-4500 is a fire retardant version of RBC-4400 Resin. It is a medium viscosity, filled, thermally conductive resin which exhibits excellent adhesive properties making it useful for bonding thermally conductive, and heat generating components. It offers excellent chemical resistance and maintains superior bonding over a wide range of operating conditions. It can be cured at room temperature or at elevated temperatures depending upon the properties required.
Mixed Viscosity @ 25oC,cps                                                                              13,000
Shelf Life, (closed Container @ 25oC)                                                                 12 Months
Color                                                                                                                Black
Specific Gravity @ 25oC                                                                                    1.50
Hardness, Shore D                                                                                            90
Linear Shrinkage, in./in.                                                                                     0.003
Moisture Absorption 24 hr. water boil, %                                                              0.22
Izod Impact Strength, ft. lbs./in. of notch                                                              0.31
Tensile Strength @ 25oC, psi                                                                              7,600
Compressive Strength @ 25oC, psi                                                                    25,300
Thermal Conductivity, cal/sec/cm2/oC/cm X 10-4                                                   25.0
Thermal Stability, 1000 Hrs. @ 175oC, % Wt. Loss                                               0.35
Coefficient of Thermal Expansion, in./in./oC X 10-6                                               28
Heat Distortion temperature, oC                                                                          155
Operating Temperature Range, oC                                                                     -65 to 155
Volume Resistivity @ 25oC, ohm-cm                                                                  5x1016
Dielectric Strength, volts/mil                                                                              480
Dielectric Constant @ 25oC, 100 KC                                                                 5.7
Dissipation Factor @ 25oC, 100 KC                                                                  0.018
The above properties are typical of a system cured with Hardener AB-312
AB-56        A fast, room temperature curing system with good chemical and thermal properties.
A-121        A resilient, low viscosity system with slightly longer pot life, that exhibits excellent
                 resistance to thermal shock.
AB-312      Good resistance to heat, chemicals, thermal and mechanical shock,
                      and good electrical properties at high humidity.
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                                                            RBC-4500 Continued
MIXING INSTRUCTIONS: Weigh the desired amount of RBC-4500 into a clean container and combine with recommended hardener in the proper ratio as shown below.
Hardener              Parts by wt.                           Pot Life
                      per 100 pts. resin                 100 grms. @ 25oC.
AB-56                    20.0                                     15-30 Minutes
A-121                    12.0                                       3 Hours
AB-312                  13.0                                       2 Hours                     
HARDENER      CURE@25OC     CURE@65OC            CURE@100OC        CURE@130OC
AB-56                    6 Hrs.             10 Min.                       ---                           ---
A-121                   24 Hrs.              3 Hrs.                         2 Hrs.                     1 Hr.
AB-312                    ----                 3 Hrs.                         2 Hrs.                     1 Hr.

RBC Industries, Inc
80 Cypress Street
Warwick, RI 02888
T:  888-RBC-EPOXY    |    888-(722-3769)    |    401-941-3000
F:  401-941-0150