Important Two-Component Material Information
Important Two-Component Material InformationIsocyanate Conditions
Spraying or dispensing 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 providingsufficient
ventilation in thework area. If sufficient ventilation
is notavailable, a supplied-air respirator is required
for everyone in the work area.
To prevent contact with isocyanates, appropriate
personal protective equipment, including
chemically impermeable gloves, boots, aprons,
and goggles, is also required for everyonein the
work area.
Material Self-Ignition
Some materialsmay become self-igniting if applied
too thickly. Read material manufacturer’s warnings
and material MSDS.
Keep Components A and B Separate
Cross-contamination can result in cured
material in fluid lines which could cause serious
injury or damage equipment. To prevent
cross-contamination of the equipment’s wetted
parts,never interchange component A (isocyanate)
and component B (resin) parts.
Moisture Sensitivity of Isocyanates
Cross-contamination can result in cured
material in fluid lines which could cause serious
injury or damage equipment. To prevent
cross-contamination of the equipment’s wetted
parts,never interchange component A (isocyanate)
and component B (resin) parts.
Isocyanates (ISO) are catalysts used in two
component foam and polyurea coatings. ISO will
react with moisture (suchas humidity) to form small,
hard, abrasive crystals,which become suspended in
the fluid. Eventually a film will form on the surface
andthe ISO will begin to gel, increasing in viscosity. If
used,this partially cured ISO will reduce performance
and the life of all wetted parts.
Theamount of film formation a nd rate of crystallization
varies depending on the blend of ISO, the humidity,
and the temperature.
To prevent exposing ISO to moisture:
• Always use a sealed container with a desiccant
dryer in the vent, or a nitrogenatmosphere. Never
store ISO in an open container.
• Keep the ISO lubepump reservoir(if installed) filled
with appropriatelubricant. The lubricantcreates a
barrier between the ISO and theatmosphere.
• Use only moisture-proof hoses compatible with
ISO.
• Never use reclaimed solvents, which may contain
moisture. Always keep solvent containers closed
when not in use.
• Always lubricate threaded partswith ISO pump oil
or grease when reassembling.