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Important Isocyanate Information
MaterialMaterial
Material
SelfSelf
Self
--
-
IgnitionIgnition
Ignition
Some materials may become self-igniting if applied
too thick. Read material manufacturer’s warnings
and SDS.
KeepKeep
Keep
ComponentsComponents
Components
AA
A
andand
and
BB
B
SeparateSeparate
Separate
Cross-contamination can result in cured
material in uid lines which could cause serious
injury or damage to equipment. To prevent
cross-contamination:
• NeverNever
Never
interchange component A and component
B wetted parts.
• Never use solvent on one side if it has been
contaminated from the other side.
ChangingChanging
Changing
MaterialsMaterials
Materials
NOTICENOTICE
NOTICE
Changing the material types used in your
equipment requires special attention to avoid
equipment damage and downtime.
• When changing materials, ush the equipment
multiple times to ensure it is thoroughly clean.
• Always clean the uid inlet strainers after
ushing.
• Check with your material manufacturer for
chemical compatibility.
• When changing between epoxies and urethanes
or polyureas, disassemble and clean all uid
components and change hoses. Epoxies often
have amines on the B (hardener) side. Polyureas
often have amines on the B (resin) side.
MoistureMoisture
Moisture
SensitivitySensitivity
Sensitivity
ofof
of
IsocyanatesIsocyanates
Isocyanates
Exposure to moisture (such as humidity) will cause
ISO to partially cure, forming small, hard, abrasive
crystals that become suspended in the uid.
Eventually a lm will form on the surface and the ISO
will begin to gel, increasing in viscosity.
NOTICENOTICE
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.
NeverNever
Never
store ISO in an open container.
• Keep the ISO pump wet cup or reservoir (if
installed) lled 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:NOTE:
NOTE:
The amount of lm formation and rate of
crystallization varies depending on the blend of ISO,
the humidity, and the temperature.
FoamFoam
Foam
ResinsResins
Resins
withwith
with
245245
245
fafa
fa
BlowingBlowing
Blowing
AgentsAgents
Agents
Some foam blowing agents will froth at temperatures
above 90°F (33°C) when not under pressure,
especially if agitated. To reduce frothing, minimize
preheating in a circulation system.
8334945B