MDACR 2342F UV Conformal Coatings

Modified polyurethane acrylate
UV moisture dual curing
Low viscosity, suitable for brush, spray, dip coating a variety of processes
After curing, a transparent elastic protective film with certain hardness and wear resistance is formed
Good adhesion to various circuit boards
Good high and low temperature resistance and flame retardant performance

MDACR 2342F UV Conformal Coatings adhesive is a single component low viscosity UV Conformal Coatings.
This product is UV wet double curing system, the shadow part of UV light can be wet curing. 100% solid, no solvent. Green and eco-friendly.
The product has the advantages of low viscosity, can be sprayed, suitable for water curtain spraying process operation, UV curing surface fast viscosity, wet resistance, salt spray resistance, dust resistance, easy to use, safe operation and so on.

Technical parameters before and after curing:

Model	MDACR 2342F
Color	Fluorescent blue clear liquid
Features	PU Modify Acrylic
Curing method	UV or moisture
Viscosity (mPas)	180-200
Density (g/cm3)	1.05-1.10
Solid content (%)	100
Warranty period (months)	6
Moisture full hardening time, h (25℃ 70%RH)	72
Hardness（Shore D）400mW/cm2，20s	50-60

Curing condition

Recommended curing conditions	365nm UV-LED Surface light source	405nm UV-LED Surface light source	0.2 KW Track type mercury lamp
Light source optical power ( mW/cm²)	700	700	0.2 KW
Curing time (s)	≥5	≥6	≥6
Accumulated energy(mj/cm²)	≥3500	≥4200	≥1200
Curing instructions: The curing speed varies with the intensity of the UV lamp, the distance from the light source, the spectral distribution of the light source, the exposure time, and the light transmittance of the substrate.

Electrical/mechanical properties (curing at 25℃ and 75% humidity for 7 days)
Hardness (Shore D)	65-70
Applicable temperature range (℃)	-50～+135
Dielectric strength (kv/mm) IPC-TM-650	≥16
Dielectric constant (70MHz)	2.9
Volume resistivity (Ohm·cm) IPC-TM-650	≥7.99×10¹³
The following data are performance tested after 7 days at room temperature
Adhesion	Hundredfold method	5B
Moisture-proof insulation properties	IPC-CC-830B	Pass
Electromigration	IPC-SM-840C	/
Electrical corrosion	IPC-CC-830B	/
High and low temperature shock	– 45-125 ℃	Pass
Hydrolytic stability	IPC-CC-830B	Pass
Salt spray test	5% NaCl solution /pH 6.5-7.2/35℃	Pass
Antifungal test	ASTM G21	Pass
Flame retardant test	UL94-V0 coating substrate test	Pass

All the above data were obtained by determination or further experimental test after 7 days of adhesive curing at 25℃, 55%RH.

Instructions

The exposure of ambient and artificial light sources should be minimized before curing.
The coating site must be cleared of flux residue, grease, release agent or other contaminants before sizing.
The curing speed depends on a number of factors, including UV lamp strength, the distance of the coating from the light source, the thickness of the coating and the amount of glue in the shaded area.
Appropriate UV lamps must be used for curing; For the opaque shadow area, the curing effect can be achieved by moisture reaction, but the final performance of the product cannot be achieved by moisture curing alone. Actual moisture curing times may vary depending on the application. Under normal humidity conditions, the shaded area can be cured with moisture within 7 days.
The product is suitable for a variety of manual and automatic spraying equipment. The source air used for spraying must be dried (dry inert gas is strongly recommended) to prevent premature moisture curing of the product. Spraying process under good ventilation. Sheet size, geometry, and coating method affect the final coating thickness.
This product is a wet curing material, and the containers and pipes in the process should be protected from moisture as much as possible.