Isocyanate Hazard
Spraying materials containing isocyanates creates potentially harmful mists, vapors, and atomized particulates.
Read 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 provid- ing sufficient ventilation in the work area. If sufficient ventilation is not available, a sup-
To prevent contact with isocyanates, appro- priate personal protective equipment, includ- ing chemically impermeable gloves, boots, aprons, and goggles, is also required for everyone in the work area.
Moisture Sensitivity of Isocyanates
Isocyanates (ISO) are catalysts used in two component foam and polyurea coatings. ISO will react with moisture (such as humidity) to form small, hard, abrasive crystals, which become suspended in the fluid. Eventually a film will form on the surface and the ISO will begin to gel, increasing in viscosity. If used, this partially cured ISO will reduce performance and the life of all wetted parts.
The amount of film formation and rate of crystallization varies depending on the blend of ISO, the humidity, and the temperature.
Isocyanate Hazard
To prevent exposing ISO to moisture:
•Always use a sealed container with a desic-
cant dryer in the vent, or a nitrogen atmo- sphere. Never store ISO in an open container.
•Use
•Never use reclaimed solvents, which may contain moisture. Always keep solvent con- tainers closed when not in use.
•Never use solvent on one side if it has been contaminated from the other side.
•Always lubricate threaded parts with Part 217374 ISO pump oil or grease when reas- sembling.
312766N | 5 |