RBC #2400 is a filled epoxy adhesive that cures at room temperature and offers excellent adhesion to both porous and non-porous surfaces. When combined with Hardener AB-520, its resistance to solvents, chemicals, and environmental conditions is impressive. Variations in rigidity and resiliency may be obtained by changing hardener ratios. It cures with low exotherm, making it an ideal encapsulant for heat-sensitive parts.
Mixed Viscosity @ 25oC,cps: 45,000
Shelf Life, (Closed Container @ 25oC): 12 Months
Specific Gravity @ 25oC: 1.30
Hardness, Shore D: 65
Linear Shrinkage, in./in.: 0.005
Moisture Absorption 10 Days @ 25oC, %: 0.50
Izod Impact Strength, ft. lbs./in. of notch: 1.10
Bond Shear Strength, psi AI/AI @ 25oC: 4,100
Tensile Strength @ 25oC, psi: 8,000
Compressive Strength @ 25oC, psi: 12,000
Thermal Conductivity, cal/sec/cm2/oC/cm X 10-4: 8.0
Thermal Stability, 1000 Hrs. @ 175oC, % Wt. Loss: 0.85
Coefficient of Thermal Expansion, in./in./oC X 10-6: 45
Heat Distortion Temperature, oC: 40
Operating Temperature Range, oC: -65 to 100
Volume Resistivity @ 25oC, ohm-cm: 9x1013
Dielectric Strength, volts/mil: 450
Dielectric Constant @ 25oC, 100 KC: 4.1
Dissipation Factor @ 25oC, 100 KC: 0.020
The above properties are typical of a semi-flexible formulation cured for 1 hour @ 65oC and 1 hour @ 120oC.
Stir #2400 Resin thoroughly in its shipping container and then weigh desired amounts of resin and hardener into a clean container. Mix thoroughly for at least three minutes by hand, or one minute by machine.
Rigid, heat resistant: 100 parts RBC #2400, 50 parts Hardener #AB-520
Semi-Flexible, impact and shock resistant: 100 parts RBC #2400, 100 parts Hardener #AB-520
Flexible, excellent peel strength: 100 parts RBC #2400, 150 parts Hardener #AB-520
Pot life ranges from 1-3 hours depending on batch size and hardener ratio. Cure for 72 hours at room temperature (25oC) or 2 hours at 65oC. For optimum properties, cure 1 hour at 65oC followed by 1 hour at 120oC.