4223 Liquid Technical Data Sheet 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 specicfi ations 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 a) 2 2 Theoretical coverage per liter 93 000 cm 14 000 in a) 2 2 Theoretical coverage per US gallon 353 000 cm 54 000 in a) Estimate based on a coat thickness of 25 m 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 14223 Liquid Temperature Ranges Properties Value 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 2