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Important Isocy
anate (ISO) Information
Important Iso
cyanate (ISO) Information
Isocyanates (ISO) are catalysts used in two
component materials.
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 supplied-air respirator is required
foreveryoneintheworkarea.
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.
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:
• 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.
Eventually a film will form on the surface and the ISO
will begin to gel, increasing in viscosity.
NOTICE
Partially c
ured ISO will reduce performance and
the life of a
ll 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 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 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.
Chang
ing Materials
NOTIC
E
Changing the material types used in your
equipment requires special attention to avoid
equipment damage and downtime.
•When
changing materials, flush the equipment
mul
tiple times to ensure it is thoroughly clean.
•Alw
ays clean the fluid inlet strainers after
flus
hing.
•Che
ck with your material manufacturer for
che
mical compatibility.
•Wh
en changing between epoxies and urethanes
or
polyureas, disassemble and clean all fluid
co
mponents and change hoses. Epoxies often
ha
ve amines on the B (hardener) side. Polyureas
of
ten have amines on the A (resin) side.
8 332458B