4223 ETC

Document overview

  • Manufacturer or author: Provided By www.digicamel.com(free datasheet download site)
  • PDF pages: 5

Technical content

ISO 9001:2015 Quality Management System. Burlington, Ontario, Canada SAI Global File: 004008 Date: 14 November 2018 / Ver. 3.00 Page 1 Technical Data Sheet

4223 Liquid

Urethane Conformal Coating

Description

4223 is a one-part, fast drying, thermoplastic polyurethane conformal coating. It cures to a durable, flexible, scratch resistant and smooth finish. It is easy to apply and can be handled in 15 minutes. It may be removed with appropriate strippers, or soldered through for repair or rework. 4223 protects printed circuit boards in extremely corrosive environments. It protects against moisture, fungus, dirt, dust, thermal shock, abrasion, short circuit, high-voltage arcing, and static discharge. Features and Benefits

  • Meets UL 746E conformal coating specifications for indoor use at 2 mil thickness on a 0.8 mm FR-4 laminate
  • Meets UL 94V-1 flammability rating
  • Fluoresces under UV-A light (blacklight)
  • Isocyanate-free Usage Parameters Properties Value Set to touch 30 min Tack free 1 h Full cure @22 °C [72 °F] 24 h Full cure @65 °C [149 °F] 1 h Shelf life 5 y Theoretical coverage per liter a) ≤93 000 cm2 [≤14 000 in2] Theoretical coverage per US gallon a) ≤353 000 cm2 [≤54 000 in2] a) Estimate based on a coat thickness of 25 µm [1.0 mil] and 65% transfer efficiency.

ISO 9001:2015 Quality Management System. Burlington, Ontario, Canada SAI Global File: 004008 Date: 14 November 2018 / Ver. 3.00 Page 2 Constant service temperature -40 to 160 °C [-40 to 320 °F] Cured Properties Physical Properties Method Value Color Visual Clear amber Solderability — Good Abrasion resistance — Excellent Fungus resistance MIL-V-173C-2 Excellent Flexibility — Good Flammability UL 94 Meets 94 V-1 Electrical Properties Method Value Dielectric strength (dry) ASTM D 115 1 800 V/mil [70.9 kV/mm] Dielectric strength (wet) ASTM D 115 1 200 V/mil [47.2 kV/mm] Chemical Resistance Method Value Water — Good Acid (10% sulfuric acid) — Excellent Alkali (1% sodium hydroxide) — Excellent Salt water — Excellent Oil ASTM D-115 Passed Copper corrosion — None

ISO 9001:2015 Quality Management System. Burlington, Ontario, Canada SAI Global File: 004008 Date: 14 November 2018 / Ver. 3.00 Page 3 Mechanical Properties Method Value Pencil hardness (ABS) ASTM D 3363 H, hard Uncured Properties Physical Properties Method Value Odor — Aromatic Viscosity @25 °C [77 °F] Brookfield ASTM D 2196 130–270 cP Specific gravity @21 °C [77 °F] ASTM D 287 0.94 g/mL Flash point ASTM D 3278 27 °C [81 °F] Boiling point — Not established Solids content (w/w) — 32% Dry film thickness per dip — ~25–38 mm [~1–1.5 mil] Compatibility The 4223 adheres to most plastics and metals used to house printed circuit assemblies; however, it is not compatible with contaminants like water, oil, or greasy flux residues that may affect adhesion. If contamination is present, first clean the surface to be coated with MG Chemicals 824 Isopropyl alcohol. Attention! Do not use on thin plastics or plastics where you want to keep original surface. The product contains a controlled amount of solvents designed to chemically etch plastic surfaces to help adhesion. Health and Safety Please see the 4223-Liquid Safety Data Sheet (SDS) for further details on transportation, storage, handling, safety guidelines, and regulatory compliance. Warning: This product contains 2-butanone, oxime (MEKO); therefore, use in a well-ventilated area and continue ventilation for 10 minutes after use.

ISO 9001:2015 Quality Management System. Burlington, Ontario, Canada SAI Global File: 004008 Date: 14 November 2018 / Ver. 3.00 Page 4 The spray gun recommendations below are based on generic paint guns and may vary by brands. Consult your spray gun manufacturer’s guide. Initial Setting Recommendations Air Cap HVLP (high volume, low pressure) or LVMP (low volume, medium pressure) Pressure Inlet: 23 psi Air flow: 13.5 SCFM a) Air cap: 10-15 psi Fluid Tip 0.8–1.3 mm a) Standard cubic foot per minute Spraying: 1. Dilute coating with 435 Thinner. Adjust ratio if required. 2. Stir the coating gently but thoroughly. 3. Spray a test pattern to ensure good flow quality. 4. At an approximate distance of 20–25 cm (8–10 in), tilt the board 45° from a vertical position and spray a thin and even coat. Use spray-and-release strokes with an even motion to avoid excess paint in one spot. Start and end each stroke off the surface. 5. Wait 15 min before applying another coat to avoid trapping solvent. 6. Rotate the board 90° and spray again to ensure good coverage. 7. Apply other coats until desired thickness is achieved (go to step 3). 8. Let dry for 15 min at room temperature before heat cure. Touch up by brushing: 1. Stir the coating gently but thoroughly. 2. Use a brush apply a small amount to touch up. Dip coating: Use a Ford or Zahn cup to monitor the viscosity of the coating as the solvent will evaporate over time. 1. Hang the PCB on a dipping arm. 2. Slowly lower the PCB into a tank and leave immersed in the coating for 2 min to allow penetration. 3. Slowly withdraw the PCB from the tank at an approximate rate of 6”/min. 4. Let dry to tack free finish before applying additional coats or heat cure.

ISO 9001:2015 Quality Management System. Burlington, Ontario, Canada SAI Global File: 004008 Date: 14 November 2018 / Ver. 3.00 Page 5 Room temperature cure:

  • Let cure at room temperature for 24 h. Heat cure:
  • Put in oven at 65 °C [149 °F] for 1 h. Packaging and Supporting Products Cat. No. Packaging Net Volume Net Weight Packaged Weight 4223-55ML Bottle 55 mL [1.86 fl oz] 51.7 g [1.82 oz] 196 g [0.43 lb] a) 4223-1L Can 945 mL [1.99 pt] 888 g [1.96 lb] 1.04 kg [2.29 lb] a) a) Case pack of 5 Technical Support Please contact us regarding any questions, suggestions for improvements, or problems with this product. Application notes, instructions and FAQs are located at www.mgchemicals.com. Email: support@mgchemicals.com Phone: +(1) 800-340-0772 (Canada, Mexico & USA) +(1) 905-331-1396 (International) +(44) 1663 362888 (UK & Europe) Mailing address: Manufacturing & Support Head Office

1210 Corporate Drive 9347–193rd Street

Burlington, Ontario, Canada Surrey, British Columbia, Canada L7L 5R6 V4N 4E7 Disclaimer This information is believed to be accurate. It is intended for professional end users who have the skills required to evaluate and use the data properly. M.G. Chemicals Ltd. does not guarantee the accuracy of the data and assumes no liability in connection with damages incurred while using it.