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Description for Dow Fluorogel 4-8022
Extremely soft, thermal/mechanical shock and vibration damping, excellent dielectric properties, solvent and fuel resistant, flexible cure schedule, reversion resistant, thick section cure, compatible with automated dispensing equipment, and physical and electrical stability over a wide temperature range.Note: This material has been discontinued. Please view the Comparable Materials tab or call us at (262) 293-7970 for additional help.
Chemical Resistance Fuel, Chemical Resistance: Solvent Application Type Seal 1 Part or 2 Part 1-Part Material Form Gel Industry Circuits, Electronics, Optoelectronics Manufacturer Dow Chemistry Silicone, Solvent-free Cure Method Addition cure, Heat Cure Temperature (°C) 20 to 25, 125, 150 Cure Time (min) 60, 30 Viscosity (cPs) 725 Color Translucent High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Volume Resistivity (O) 1.2E+12 (ohms/cm) Light Refractive Index (RI) High, 1.3900 -
Technical Data for Dow Fluorogel 4-8022
Overview
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Chemical Resistance
- Chemical Resistance - Fuel
- Chemical Resistance : Relative Solvent Resistance - Solvent
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Application Type
- Sealant - Seal
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1 Part or 2 Part
- 1-Part
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Material Form
- Gel
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Industry
- Electronics - Circuits, Optoelectronics
- Industrial - Delicate components
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Chemistry
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Application Method
- Dispenser - Automated dispensing equipment
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Cure Method
- Heat
- 2-Part Cure - Addition cure
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Color
- Translucent
Specifications
Cure Specs
Cure Temperature (°C) 20 to 25, 125, 150 Cure Time (min) 60, 30 Viscosity (cPs) 725 Work / Pot Time (min) 43,200 Test Method Material Resistance
High Temperature Resistance (°C) 200 Low Temperature Resistance (°C) -45, -55 Moisture/Humidity Resistance Moisture/humidity resistance Conductivity
Dissipation Factor 0.55900, 0.00318 Test Method Dielectric Strength (V/mil) Excellent, 375 Dielectric Constant 7.09, 7.10 Test Method Volume Resistivity (O) 1.2E+12 (ohms/cm) Hardness
Shore A Hardness 50 g Flexibility Soft, Flexible, Resilient Other Properties
Light Refractive Index (RI) High, 1.3900 Specific Gravity 1.230 Test Method Coefficient of Thermal Expansion (CTE) 540 (Linear (micron/m °C or ppm )) Business Information
Shelf Life Details Storage conditions and shelf life (“Use By” date) are indicated on the product label. Shelf Life Temperature (°F) 41 Shelf Life (mon) 9 -
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Best Practices for Dow Fluorogel 4-8022
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Mixing
Some gels are supplied in bladder packs that avoid direct air contact with the liquid gel components, allowing use of air pressure over the pack in a pressure pot for dispensing. Do not apply air pressure directly to the liquid gel surface (without the bladder pack) as the gel can become supersaturated with air and bubbling can occur when the material is dispensed and cured. Use of bladder packs prevents bubbling, maintains cleanliness and avoids gel contamination. Gels can be dispensed manually or by using one of the available types of meter mix equipment. If possible, the potential for entrapment and incorporation of gas (typically air) should be considered during design of the part and selection of a process to dispense the gel. This is especially important with higher-viscosity and fastercuring gels. Degassing at >28 inches (10-20 mm) Hg vacuum may be necessary to ensure a void-free, protective layer.
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Testing
If a substrate or material is questionable with respect to potentially causing inhibition of cure, a small-scale compatibility test should be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure. In certain situations, toughened gels may appear fully cured but have reduced or no adhesion. This may result from slight inhibition at the interface.
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Comparable Materials for Dow Fluorogel 4-8022
Spec Engine® Results
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Work / Pot Time Test Methods
Work / Pot Time | Temperature |
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43,200 min | 25°C |
Dielectric Constant Test Methods
Dielectric Constant | Test Method |
---|---|
7.09 | Dielectric Constant at 100 Hz |
7.10 | Dielectric Constant at 100 kHz |
Dissipation Factor Test Methods
Dissipation Factor | Test Method |
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0.55900 | Dissipation Factor at 100 hz |
0.00318 | Dissipation Factor at 100 kHz |
Specific Gravity Test Methods
Specific Gravity | Test Method |
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1.230 | Uncured |