Important Isocyanate (ISO) Information
Important Isocyanate (ISO) Information
Isocyanates (ISO) are catalysts used in two component materials.
Eventually a film will form on the surface and the ISO will begin to gel, increasing in viscosity.
Isocyanate Conditions
Spraying or dispensing materials containing isocyanates creates potentially harmful mists, vapors, and atomized particulates.
Read and understand material manufacturer’s warnings and material MSDS to know specific hazards and precautions related to isocyanates.
Prevent inhalation of isocyanate mists, vapors, and atomized particulates by providing sufficient ventilation in the work area. If sufficient ventilation is not available, a
To prevent contact with isocyanates, appropriate personal protective equipment, including chemically impermeable gloves, boots, aprons, and goggles, is also required for everyone in the work area.
NOTICE
Partially cured ISO will reduce performance and the life of all wetted parts.
•Always use a sealed container with a desiccant dryer in the vent, or a nitrogen atmosphere. Never store ISO in an open container.
•Keep the ISO pump wet cup or reservoir (if installed) filled with appropriate lubricant. The lubricant creates a barrier between the ISO and the atmosphere.
•Use only
•Never use reclaimed solvents, which may contain moisture. Always keep solvent containers closed when not in use.
•Always lubricate threaded parts with an appropriate lubricant when reassembling.
NOTE: The amount of film formation and rate of crystallization varies depending on the blend of ISO, the humidity, and the temperature.
Keep Components A and B Separate
•Never interchange component A and component B wetted parts.
•Never use solvent on one side if it has been contaminated from the other side.
Moisture Sensitivity of Isocyanates
Exposure to moisture (such as humidity) will cause ISO to partially cure; forming small, hard, abrasive crystals, which become suspended in the fluid.
Changing Materials
NOTICE
Changing the material types used in your equipment requires special attention to avoid equipment damage and downtime.
•When changing materials, flush the equipment multiple times to ensure it is thoroughly clean.
•Always clean the fluid inlet strainers after flushing.
•Check with your material manufacturer for chemical compatibility.
•When changing between epoxies and urethanes or polyureas, disassemble and clean all fluid components and change hoses. Epoxies often have amines on the B (hardener) side. Polyureas often have amines on the A (resin) side.
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