Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- Key Attributes
- Clear, thin, flexible, and durable
- Protects against dust, humidity, salt spray, corrosion, and chemical fogs
- Protects against electrical arching, shorts, static discharges, and thermal shocks
- Contains a UV indicator for optical inspection
- Applied by brushing, dipping, manual and selective spraying
- Available in liquid, aerosol, and pen
- IPC and UL certified versions
- Key Attributes
- Excellent corrosion resistance
- Xylene and isocyanate free
- Fluoresces under UV-A light
- Suitable for use with selective coating equipment
- Brush
- 4223F can be applied by brush for rework or touch-ups. Thinning is not required for most brush applications. Desired coating thickness can be achieved in a single application. Applied coating can be cured immediately.
Applications & Uses
- Application Method
- Cure Method
- Applications
- Improves reliability, and lengthens the life of electronic circuitry
- Protects circuitry in coastal, tropical, marine, and other humid environments
- Allows electronic devices to operate in harsh environments
- Allows traces to be placed closer together by preventing arcing
- Manual Spray Guns
4200UV can be readily sprayed using conventional spray guns. Ensure air lines are dry to prevent any premature curing. Use a standard fluid nozzle gun with a minimum tip diameter of 0.8–1.0 mm. The settings listed below are recommendations; however, performance will vary with different brands:
Inlet Air flow Air cap 20–40 psi 10–15 SCFM 8–10 psi - Dilute 1-part coating to 1-part thinner (MG #4352 Thinner 2). Adjust ratio if required.
- Stir the coating gently, but thoroughly.
- Spray a test pattern to ensure good flow quality.
- Tilt the board at 45° and spray a thin even coat from a distance of 20–25 cm (8–10 in). Use spray-andrelease strokes with an even motion to avoid paint buildup in one spot. Start and end each stroke off the surface.
- Wait 5 min between coats to avoid trapping solvent.
- Rotate the board 90° and spray again to ensure good coverage.
- Apply additional coats until desired thickness is achieved (go to step 3).
- Let dry for 15 min at room temperature before applying heat cure.
- Dip Coat
Due to the dual curing nature of this coating, it is important to control exposure to light and moisture to prevent premature curing.
- Hang the PCB on a dipping arm.
- Slowly lower the PCB into a tank and leave immersed in the coating for 2 min to allow penetration.
- Slowly withdraw the PCB from the tank at a rate of approximately 6" per minute.
- Applied coating can be cured immediately.
- Recommended Preparation
- Clean the substrate with Isopropyl Alcohol, MG #824, so the surface is free of oils, dust, and other residues.
- Recommended Thinner
- When thinning is required, use MG #4352 Thinner 2.
Properties
- Typical Properties
- Cured Properties
- Uncured Properties
- Selective Coating
For higher volume applications, coating can be applied via selective coating equipment. The settings listed below are recommendations and performance will vary with different brands.
Settings PVA Nordson Asymtek Platform PVA 650 SL 940E Valve FC100-CF SC 280N Dilution 2:1 with 435 5:1 with 4352 Air Pressure N/Av 80 psi Fluid Pressure 17 psi 23 psi Dispense Height 10 mm 12.7 mm Pass Width 8 mm N/Av Coating Speed 400 mm/sec 400 mm/sec - Cure Instructions
The product will not cure at room temperature. After letting sit for 15 minutes, cure the coating in an oven at one of these time/temperature options:
Temperature 80 °C 100 °C Time 16 hours 2 hours
| Value | Units | Test Method / Conditions | |
| Theoretical Coverage (at 25 Μm) | 109 400 | cm2/L | — |
| Recommended Film Thickness | 25-75 | μm | — |
| Minimum Recoat Time | 5 | minute | — |
| Dry Time to Handle (1 coat) | 15 | minute | — |
| Dry Time to Handle (2 coats) | 25 | minute | — |
| Value | Units | Test Method / Conditions | |
| Resistivity | 3.5 x 10⁽¹³⁾ | Ω·cm | — |
| Dielectric Withstand Voltage | min. 1500 | V | — |
| Service Temperature Range | -65 to 125 | °C | — |
| Dielectric Strength | 1 000 | V/mil | — |
| Dissipation Factor (at 1 MHz) | 0.009 | — | — |
| Moisture Insulation Resistance | 1 x 10⁽¹²⁾ | Ω | — |
| Dielectric Constant (at 1 MHz) | 0.29 | — | — |
| Insulation Resistance | 1 x 10⁽¹³⁾ | Ω | — |
| Glass Transition Temperature (Tg) | 57 | °C | — |
| CTE (Prior Tg) | 130 | ppm/˚C | — |
| CTE (After Tg) | 190 | ppm/˚C | — |
| Value | Units | Test Method / Conditions | |
| Calculated VOC | 482 | g/L | — |
| Density | 0.89 | g/mL | — |
| Solid Content | 45 | % | — |
| Viscosity (at 25˚C) | 290 | cP | — |
Regulatory & Compliance
- Chemical Inventories
- Quality Standards
- Certified
- Certified UL 746E (File# E203094) for outdoor use
- Certified IPC-CC-830B
- Certified
IPC-CC-830B and UL746E
Technical Details & Test Data
- Clean-up
- Clean spray system and equipment with MEK or acetone, MG # 434.
Packaging & Availability
- Available Packaging
Cat. No. Packaging Net Volume Net Weight 4223F-55ML Bottle 55 mL 48.68 g 4223F-1L Can 945 mL 841 g 4223F-4L Can 3.78 L 3.36 kg 4223F-20L Pail 18.9 L 16.8 kg
Storage & Handling
- Shelf Life
- 3 Years
- Storage and Handling
- Store between -5 and 40 ˚C in a in a dry area, away from sunlight (see SDS).