Urethane 71 - Liquid Sealing Spray
Air-drying single-component polyurethane-alkyd resin coating.
PROPERTIES
URETHAN 71 is an excellent insulation for printed circuit boards. It is a transparent protective coating with The coating has outstanding adhesion performance in the temperature range of -40°C to +120°C. URETHAN 71 based coatings can also be used in humid or aggressive environments due to chemical cross-linking reactions that occur after the drying phase.
APPLICATIONS
- In printed circuit boards and coils in electric motors provides long-term protection
- Anti-moisture sealant for all types of metal in corrosive environments
- Used in: Armature coils, housings, cables, connectors, control systems, electronic components, solenoids, machine tools, transformer clamps and enclosures.
- URETHAN 71, due to its aesthetics and good adhesion to many materials, can also be used to provide decorative and transparent protection for everyday metal items. The slight yellow color enhances the aesthetics of non-ferrous metal surfaces.
INSTRUCTIONS
For minor operations and service applications, the easiest way to use URETHAN 71 is as an aerosol. is to use it from the box. Spray the product on a dry and oil-free surface from a distance of 20-30 cm. We recommend Contact PCC to remove oily deposits, dirt and flux residue from PCBs. After use, purge the valve by spraying the can in an upside down position until only the propellant is released.
For mass production runs, bulk URETHAN 71 can be applied by brush, dipping or spraying. If the mixture provided is too viscous for the spraying equipment available, a little "Thinner for Urethan 71" (acetone) may be added. The exact mixing ratio should be determined by trial.
The product should be properly capped when stored. Since URETHAN 71 is susceptible to cross-linking during drying, a coating cannot be made reusable by dilution once it has thickened.
At ambient temperature, almost all solvents will evaporate after 120 minutes, allowing the coating to be processed further for assembly. Chemical crosslinking reactions take several days under ambient conditions. However, 90% crosslinking can be achieved after 24 hours of storage at 60°C.
URETHAN 71 contains flammable solvents and therefore all sources of ignition must be removed. Ensure there is good ventilation in the workplace.
Further safety information can be obtained from the Safety Data Sheet.
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