MDACR 2342 UV Cured polyurethane acrylate Coating

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

Product description

MDCOAT 7067 Silicone coating adhesive is a low viscosity neutral organic silicone that is easy to spray, dip, brush or pour. Protective coatings for hard and soft printed circuit boards and impregnated porous substrates protect electronic products under harsh conditions in a stable state.

Data Sheet

Model number	MDACR 2342
Colour	Fluorescent blue transparent liquid
Type	Modified polyurethane acrylate
Curing method	UV or Moisture
Viscosity (mPas)	60-250
Specific gravity (g/cm3)	1.05-1.10
Solid content (%)	100
Warranty Period (months)	6
Surface dissticking time, s, 300mW/cm²	3-5
Full hardening time of moisture, h (25℃ 70%RH)	72
Hardness (Shore A) 300mW/cm²	70-80
Electrical/mechanical properties (curing at 25℃ and 75% humidity for 7 days)
Hardness (Shore D)	60-70
Applicable temperature range (℃)	-50～+135
Dielectric strength (kv/mm) IPC-TM-650	≥16
Dielectric constant (1.2MHz)	3.0
Volume resistivity (Ohm/cm) IPC-TM-650	≥5.0×10¹⁴
The following data are tested after 7 days at room temperature
Adhesive force	Hectograph	5B
Moisture-proof insulation properties	IPC-CC-830B	Pass
electromigration	IPC-SM-840C	ND
electrocorrosion	IPC-CC-830B	ND
High and low temperature impact	-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	Pass

Application

Hybrid integrated circuit
Automotive electronic control panel
Electronic circuit board
Aeronautical instrument
Soft printed circuit board
Computer control panel
Industrial control panel
Semiconductor crystal line protection
Home appliance controller
Outdoor LED display

How to use

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.