Typical Technical Properties of LC-FC260 Fluorinated Electronic Coating
Active Ingredient: | Fluoropolymer |
Appearance: | Clear yellow liquid |
Carrier Solvent: | Fluorinated solvent |
Solid Content (%): | 2%, 5%, 10% (Customizable upon request) |
Odor: | Odorless |
Flash Point: | None |
Boiling Point (°C): | 50 - 68 |
Cured Film Properties (By Grade)
Property | LC-FC260-2 | LC-FC260-5 | LC-FC260-10 |
Solid Content: | 2.0% | 5.0% | 10.0% |
Cured Film Color: | Yellow | Yellow | Yellow |
Light Transmittance: | ≥ 90% | ≥ 90% | ≥ 90% |
Single-Coat Dry Film Thickness: | 1.0 - 1.5 μm | 1.0 - 2.5 μm | 2.0 - 3.5 μm |
Tack-Free Time (Ambient) | 30s | 1min | 2min |
Static Water Contact Angle | ≥ 110° | ≥ 110° | ≥ 110° |
Static n-Hexadecane Contact Angle | ≥ 75° | ≥ 75° | ≥ 75° |
Surface Free Energy (mN/m) | 10 - 12 | 10 - 12 | 10 - 12 |
Color Retention Time | At least 30 days | At least 30 days | At least 30 days |
Adhesion (ASTM D3359) | 5B | 5B | 5B |
Glass Transition Temperature (Tg) | 10 - 15°C | 10 - 15°C | 10 - 15°C |
Thermal Stability (1% weight loss) | ~ 250°C | ~ 250°C | ~ 250°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-FC260 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. For spray coating, use local exhaust ventilation to control fluorinated solvent vapor concentration in the work area.
Applications of LC-FC260 Fluorinated Electronic Coating
1. Visual Inspection Zones and Field-Serviceable Assemblies
Used where coating coverage must be verified by direct visual inspection without UV blacklight equipment, including in-line quality checks at assembly stations without UV inspection infrastructure, field service verification of coating integrity on deployed equipment, and acceptance inspection by non-specialist personnel. Yellow tint at ≥90% light transmittance is visible on PCB surfaces under standard workshop or field lighting. Verify color visibility against specific PCB substrate color (green, blue, black soldermask) at target film thickness before production qualification.
2. 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 1.0–3.5 µm does not affect electrical connectivity at contact pads or connector pins. Tg of 10–15°C means the cured film is above glass transition temperature at ambient operating conditions (>15°C), maintaining elastomeric behavior during thermal cycling. Verify coating integrity after thermal cycling per IEC 60068-2-14 or equivalent before production qualification.
3. 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 (10–12 mN/m) preventing capillary migration of lubricating oils beyond the lubrication zone. LC-FC260-2 is the recommended grade for this application. Note that the yellow tint of the cured film may be visible on transparent or lightly colored precision components — verify acceptability before adoption in optical assemblies.
4. Hard Disk Drive MR Head Protection
Applied to magnetoresistive read heads to prevent lubricant transfer and particulate contamination. Film thickness control is critical — use LC-FC260-2 and verify dry film thickness by ellipsometry or profilometry on production samples.
5. Precision Micro-Part Sealing
Used for environmental sealing of precision micro-parts and miniaturized sensors where conventional conformal coating film thicknesses are incompatible with component dimensional tolerances. Thermal stability to ~250°C allows use in assemblies passing through 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-FC260 Fluorinated Electronic Coating
In 100g, 500g, 1kg, 25kg.
Safety and Storage of LC-FC260 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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