Graco 3A1163A important safety instructions Important Two-Component Material Information

Important Two-Component Material Information

Important Two-Component Material Information

Isocyanate Conditions

Spraying or dispensing materials containing isocya- nates creates potentially harmful mists, vapors, and atomized particulates.

Read material manufacturer’s warnings and mate- rial MSDS to know specific hazards and precautions related to isocyanates.

Prevent inhalation of isocyanate mists, vapors, and atomized particulates by providing sufficient ventila- tion in the work area. If sufficient ventilation is not available, 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 everyone in the work area.

Material Self-ignition

Some materials may become self-igniting if applied too thickly. Read material manufacturer’s warnings and material MSDS.

Moisture Sensitivity of

Isocyanates

Isocyanates (ISO) are catalysts used in two component 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 vis- cosity. If used, this partially cured ISO will reduce perfor- mance and the life of all wetted parts.

NOTE: The amount of film formation and rate of crystal- lization 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 nitrogen atmosphere. Never store ISO in an open container.

•Use moisture-proof hoses specifically designed for ISO, such as those supplied with your system.

•Never use reclaimed solvents, which may contain moisture. Always keep solvent containers closed when not in use.

•Never use solvent on one side if it has been contam- inated from the other side.

•Always lubricate threaded parts with ISO pump oil or grease when reassembling.

Changing Materials

•When changing materials, flush the equipment mul- tiple times to ensure it is thoroughly clean.

Keep Components A and B Separate

Cross-contamination can result in cured material in fluid lines which could cause serious injury or dam- age equipment. To prevent cross-contamination of the equipment’s wetted parts, never interchange component A (isocyanate) and component B (resin) parts.

•Always clean the fluid inlet strainers after flushing.

•Check with your material manufacturer for chemical compatibility.

•Most materials use ISO on the A side, but some use ISO on the B side.

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