Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Ready-to-Use Product Features
- Clean-up
- Clean spray system and equipment with MEK or acetone, MG #434.
- Key Attributes
- Xylene and toluene free
- Fluoresces under UV-A light
- Suitable for use with selective coating equipment
- 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
- Features & Benefits
- Xylene and toluene free
- Fluoresces under UV-A light
- Suitable for use with selective coating equipment
- 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.
Applications & Uses
- Markets
- Application 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
- Brush
- 419E 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.
- Dip Coat
Use a Ford or Zahn cup to monitor the viscosity of the coating, as the solvent will evaporate over time.
- 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.
- Let dry for 3 min before applying additional coats or 10 min before heat cure.
- Manual Spray Guns
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 3 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 10 min at room temperature before applying heat cure.
- 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 FCS300-ES SC 280N Dilution 1:1 with 4352 8:3 with 4352 Air Pressure 0.5 psi 80 psi Fluid Pressure 5 psi 25 psi Dispense Height 10 mm 12.7 mm Pass Width 5 mm N/Av Coating Speed 100 mm/sec 500 mm/sec
Properties
- Typical Properties
- Cured Properties
- Uncured Properties
- Cure Instructions
Allow to dry at room temperature for 24 hours, or after letting sit for 10 minutes, cure the coating in an oven at one of these time/temperature options:
Temperature 65 °C 80 °C 100 °C Time 30 min 15 min 5 min
| Value | Units | Test Method / Conditions | |
| Dry Time to Handle (1 coats) | 15 | minute | — |
| Dry Time to Handle (2 coats) | 25 | minute | — |
| Minimum Recoat Time | 3 | minute | — |
| Recommended Film Thickness | 25-75 | μm | — |
| Theoretical Coverage (at 25 μm) | 93176 | cm2/L | — |
| Value | Units | Test Method / Conditions | |
| CTE (Prior Tg) | 160 | ppm/˚C | — |
| Dielectric Strength | 1100 | V/mil | — |
| Dielectric Withstand Voltage | min. 1500 | V | — |
| Glass Transition Temperature (Tg) | 38 | °C | — |
| Insulation Resistance | 1 x 10¹² | Ω | — |
| Moisture Insulation Resistance | 1 x 10¹² | Ω | — |
| Resistivity | 3.5 x 10¹³ | Ω·cm | — |
| Service Temperature Range | -65 to 130 | ˚C | — |
| Value | Units | Test Method / Conditions | |
| Calculated VOC | 654 | g/L | — |
| Density | 0.92 | g/mL | — |
| Solid Content | 30 | % | — |
| Viscosity (at 25˚C) | 115 | cP | — |
Regulatory & Compliance
- Chemical Inventories
- Certified
- UL 746E (File# E203094)
- IPC-CC-830C
Packaging & Availability
- Available Packaging
Cat. No. Packaging Net Vol. Net Wt. 419E-1L Can 945 mL 830 g 419E-4L Can 3.78 L 3.32 kg 419E-20L Pail 18.9 L 16.6 kg
Storage & Handling
- Shelf Life
- 5 years
- Storage and Handling
- Store between -5 and 40 ˚C in a in a dry area, away rom sunlight (see SDS).