Typical Technical Properties of LC-FC181 Fluorinated Electronic Coating
Active Ingredient: | Fluoropolymer |
Appearance: | Colorless clear liquid |
Carrier Solvent: | Fluorinated solvent |
Solid Content (%): | 2%, 5%, 10% (Customizable upon request) |
Flash Point: | None |
Boiling Point (°C): | 50 - 68 |
Cured Film Properties (By Grade)
Property | LC-FC18-2 | LC-FC18-5 | LC-FC18-10 |
Solid Content: | 2.0% | 5.0% | 10.0% |
Cured Film Color: | Colorless | Colorless | Colorless |
Light Transmittance: | ≥ 91% | ≥ 91% | ≥ 91% |
Single-Coat Dry Film Thickness: | 0.5 - 1.5 μm | 1.5 - 2.5 μm | 3 - 10 μm |
Tack-Free Time (Ambient): | 30s | 1min | 2min |
Static Water Contact Angle: | ≥ 118° | ≥ 118° | ≥ 118° |
Static n-Hexadecane Contact Angle: | ≥ 80° | ≥ 80° | ≥ 80° |
Surface Free Energy (mN/m) | 8 - 10 | 8 - 10 | 8 - 10 |
Adhesion (ASTM D3359) | 5B | 5B | 5B |
Melting Point | 70 - 80°C | 70 - 80°C | 70 - 80°C |
Thermal Stability (1% weight loss) | ~ 260°C | ~ 260°C | ~ 260°C |
Dielectric Constant: | 3.1 | 3.1 | 3.1 |
Volume Resistivity: | >1014Ω·m | >1014Ω·m | >1014Ω·m |
Surface Resistivity: | >1014Ω·m | >1014Ω·m | >1014Ω·m |
Coating Process of LC-FC181 Fluorinated Electronic Coating
Suitable for spray coating, dip coating, roll coating, and blade coating. Use fluoropolymer-compatible equipment (stainless steel or PTFE-lined). For dip coating, control withdrawal speed to manage wet film uniformity; faster withdrawal increases film thickness. For spray coating, use local exhaust ventilation to control fluorinated solvent vapor concentration in the work area.
Applications of LC-FC181 Fluorinated Electronic Coating
1. PCBA and FPCA Protection
Applied to PCBs and flexible circuit assemblies as a thin conformal barrier against condensation, dust, industrial oils, solvents, and corrosive gases. Film thickness of 0.5–10 µm does not affect electrical connectivity at contact pads or connector pins. The cured film is directly solderable — components can be soldered through the coating without prior removal, reducing rework time relative to conventional thick-film conformal coatings. For rework requiring full coating removal, apply compatible fluorinated solvent remover and verify complete removal by contact angle measurement (target: untreated PCB substrate contact angle) before recoating.
2. Precision Anti-Migration (Epilame)
Applied to surfaces adjacent to lubricated components in micro-motors, watch movements, and optical camera mechanisms to form a low-surface-energy barrier (8–10 mN/m) that prevents capillary migration of lubricating oils beyond the lubrication zone. LC-FC18X-2 is the recommended grade for this application — 0.5–1.5 µm film build and 30-second tack-free time are compatible with precision assembly throughput requirements. Verify epilame effectiveness by lubricant spreading test on coated vs. uncoated reference surfaces before production qualification.
3. Hard Disk Drive MR Head Protection
Applied to magnetoresistive read heads to prevent lubricant transfer from disk surfaces and particulate contamination. Film thickness control is critical — use LC-FC18X-2 and verify dry film thickness by ellipsometry or profilometry on production samples. Water contact angle ≥118° and n-hexadecane contact angle ≥80° confirm both hydrophobic and oleophobic barrier function on the head surface.
4. Precision Micro-Part Sealing
Used for environmental sealing of precision micro-parts, MEMS devices, and miniaturized sensors where conventional conformal coating film thicknesses are incompatible with component dimensional tolerances. Thermal stability to ~260°C (1% weight loss) allows use in assemblies subjected to reflow soldering profiles after coating.
Full Series Comparison
Dimension | LC-FC260 | LC-FC631/633 | LC-FC181/183 | LC-FC130 |
Water contact angle | ≥110° | ≥110° | ≥118° | ≥110° |
n-Hexadecane contact angle | ≥75° | ≥75° | ≥80° | ≥70° |
Surface free energy (mN/m) | 10–12 | 10–11 | 8–10 | 10–12 |
Thermal stability (1% wt loss) | ~250°C | ~260°C | ~260°C | ~190°C |
Tg / melting point | Tg 10–15°C | Tg 5–10°C | Mp 70–80°C | Mp 25–30°C |
Max single-coat thickness | 2.0–3.5 µm | 1.5–2.5 µm | 3–10 µm | 1.5–2.5 µm |
Visual indicator | Yellow tint — ambient light | UV fluorescent (633 only) | UV fluorescent (183 only) | Not specified |
Color retention | ≥30 days | N/A | N/A | N/A |
Packing of LC-FC181 Fluorinated Electronic Coating
In 100g, 500g, 1kg, 25kg.
Safety and Storage of LC-FC181 Fluorinated Electronic Coating
Keep in a cool, dry, and well-ventilated environment, avoiding direct sunlight, heat, and ignition sources. The shelf life is 24 months from the date of manufacture when stored in original unopened containers. Classified as a non-hazardous substance for transport and handling. Storage beyond the shelf life does not necessarily mean the product is unusable; however, the properties required for the intended use must be thoroughly checked for quality assurance reasons prior to application.
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