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Engineered to eliminate electronic speed controller (ESC) dielectric breakdown, thermal throttling, and hydrocarbon-induced degradation.
Unmanned Aerial Vehicles (UAVs), electric Vertical Takeoff and Landing (eVTOL) aircraft, and industrial multirotors are undergoing exponential growth across commercial defense, precision agriculture, offshore survey, and automated cargo logistics. At the heart of every high-performance drone is the Electronic Speed Controller (ESC) and Central Flight Controller Mainboard.
The ESC switches massive currents at high frequencies to drive multi-phase brushless DC (BLDC) motors. During demanding maneuvers, rapid throttle bursts generate acute thermal spikes up to 130°C on switching MOSFETs. Simultaneously, industrial drones operate exposed to hydraulic fluids, engine oil mist in hybrid-gas multirotors, aggressive agricultural pesticide aerosols, and marine saltwater sprays.
Our specialized oil-resistant silicone potting compound bridges this gap by combining the elastomeric flexibility of cross-linked polydimethylsiloxane (PDMS) with modified fluorosilicone chemistry, ensuring complete chemical inertness against lubricants, fuels, and organic crop-spraying agents.
Engineered with trifluoropropyl functional groups that resist degradation, swelling, and softening from prolonged exposure to synthetic engine oils, aviation fuels, hydraulic mists, and agricultural chemicals.
Forms an impenetrable, hermetic barrier that blocks moisture ingress, salt spray corrosion, condensation, and pressurized water jets during low-altitude marine and heavy downpour operations.
Offers high thermal conductivity (up to 2.5 W/m·K) to dissipate localized heat from high-frequency ESC MOSFETs, coupled with ultra-low modulus to absorb mechanical shock and thermal expansion mismatch.
Understanding why standard potting formulations fail in industrial drone flight operations and how modified silicone chemistry delivers uncompromising reliability.
Standard electronic silicones consist of a repeating siloxane backbone (-Si-O-Si-) bonded to non-polar methyl groups (-CH3). When exposed to non-polar solvents, mineral oils, or fuel mist, these methyl chains experience Van der Waals attraction with solvent molecules, causing the silicone network to swell, soften, and eventually detach from the PCB copper traces and MOSFET legs.
Songxi Technology integrates polar fluoroalkyl substituents into the polymer matrix. The high electronegativity of fluorine atoms creates a powerful electrostatic shield and lowers surface energy, preventing hydrocarbon oil molecules from penetrating the matrix. The encapsulated ESC PCB maintains 100% mechanical integrity, insulation resistance (>1014 Ω·cm), and interfacial adhesion under continuous chemical exposure.
Furthermore, addition-cure (platinum-catalyzed) formulation guarantees zero byproducts during curing, ensuring no shrinkage, no acidic vapor corrosion, and rapid deep-section vulcanization even inside sealed aluminum ESC housings.
| Property Parameter | Standard Test Method | Songxi Oil-Resistant Potting Silicone | Conventional Standard Silicone |
|---|---|---|---|
| Chemical / Oil Resistance (Synthetic Oil @ 70°C, 168h) | ASTM D471 | Volume Change < 3.5% (No Softening) | Volume Swell > 35% (Severe Degradation) |
| Thermal Conductivity (W/m·K) | ASTM D5470 | 1.5 – 2.5 W/m·K (Customizable) | 0.2 – 0.6 W/m·K |
| Waterproof Ingress Protection | IEC 60529 | IPX8 (Continuous Submersion) & IP69K | IPX4 – IPX6 |
| Dielectric Strength (kV/mm) | ASTM D149 | ≥ 22 kV/mm | ≥ 15 kV/mm |
| Hardness (Shore A) | ASTM D2240 | 30 – 50 A (Elastic Stress Relief) | 40 – 70 A |
| Operating Temperature Range | Continuous | -60°C to +200°C | -40°C to +150°C |
| Flame Retardancy | UL 94 | V-0 Certified | HB or Non-rated |
From heavy-payload agricultural sprayers to long-endurance hybrid drones, our encapsulation compounds withstand extreme mechanical and environmental conditions.
Agricultural drones encounter concentrated pesticide aerosols, chemical fertilizers, and emulsifiable concentrates. Our oil-resistant potting prevents chemical migration into delicate gate drivers and microcontrollers, avoiding sudden in-flight power failure.
Hybrid powertrains utilize two-stroke/four-stroke range extenders that emit unburnt fuel vapors, oil droplets, and high vibration. Our encapsulation shields the mainboard against hydrocarbon mist while absorbing severe harmonic engine oscillations.
Navigating coastal and offshore environments exposes avionics to intense saline fog, splash water, and crude oil contamination. The cross-linked polymer provides an airtight seal preventing electrochemical dendrite growth and corrosion.
With glass transition temperatures (Tg) below -60°C, the silicone maintains pliable elastomeric properties without micro-cracking in sub-zero alpine flights or softening under intense desert sunlight.
Miniaturized 4-in-1 ESC stacks pack high current density into tiny form factors. The potting compound flows seamlessly under tight BGA chips and power MOSFETs to eliminate hot spots without adding excessive payload weight.
Urban delivery drones require 24/7 all-weather dependability through rainstorms and street oil grime. Compliant with UL 94 V-0, our formulation ensures flight security and fire containment during high-speed fast charging.
Songxi Technology is a high-tech enterprise specializing in the R&D, production, and sales of electronic adhesives. Based on silicone, polyurethane, acrylic, and epoxy systems, we provide reliable bonding, sealing, and protection solutions for power electronics, optoelectronics, new energy, automotive, and aerospace industries.
We are committed to becoming a trusted provider of functional polymer material solutions for the electronics industry. Through continuous innovation and application development, we promote the localization of high-end electronic adhesives and help intelligent devices achieve greater stability and durability.
Songxi's business covers three functional areas: adhesive & sealing, potting & protection, and thermal interface materials. Our product portfolio includes PCBA fixing adhesives, UV adhesives, sealants, thermal conductive potting compounds, thermal greases, pads, two-component thermal gels, EMI shielding sealants, and reactive hot melt adhesives.
Our products serve power batteries, photovoltaic modules, drones, automotive electronics, 5G communications, and LED lighting. We provide both standard products and customized solutions for applications such as BMS conformal coating, IGBT thermal filling, and power battery structural bonding, supported by extensive technical experience and application expertise.
Led by a Ph.D. in Polymer Materials from Sichuan University, Songxi's R&D team has nearly twenty years of silicone application experience and has participated in over 100 product development projects. We maintain cooperation with research institutions including Chenguang Chemical Research Institute, Sichuan University, and Beijing Institute of Technology.
Certified with ISO9001, Songxi operates a comprehensive management system covering procurement, production, inspection, and after-sales service. Our products comply with RoHS and REACH requirements, with SGS verification and UL 94 V-0 flame retardant certification, ensuring consistent quality and reliable delivery.
Select from our comprehensive lineup of industrial-grade potting, sealing, and thermal conductive compounds.
Songxi adheres to integrity and quality throughout material selection, production, and delivery, turning reliability into a competitive advantage and earning long-term customer trust through professional service and continuous improvement across global markets.
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