Handling Considerations


Product Description

POLYOX™ polymers are water-soluble solids that are normally supplied as a powder in fiber drums or in Flexible Intermediate Bulk Containers (FIBCs).

POLYOX™ can be handled in common materials of construction such as steel, aluminum and stainless steel, and is compatible with most common gasketing materials.

Explosion and fire hazard

As an organic solid, POLYOX™ will burn. In piles they burn with about the same ease as cornstarch. When the powder is dispersed in air explosive mixtures can be formed.

Equipment and operating procedures for handling POLYOX™ powders should be designed to prevent the formation of explosive mixtures and/or control the effects of explosions as described in National Fire Protection Association documents NFPA 69 “Explosion Prevention Systems” and NFPA 68 “Venting of Deflagrations.”

Static electricity hazard

POLYOX™ powders may be ignited by small energy sources such as static electricity. This may be generated and accumulate during transfer of the powders. POLYOX™ powders have a low Minimum Ignition Energy (MIE) – sub-325 mesh powder has been measured at less than 10 mJ. Dry POLYOX™ powders are electrically nonconductive with a typical volume resistivity of the order 1010 –1011 ohm-m.

To minimize accumulation of static electricity, all conductive equipment, containers, piping and personnel handling the powder should be grounded as described in NFPA 77 “Static Electricity”. Pipes and metallic flexible hoses should normally have a resistance to ground of 10 ohms or less from every point, although up to 1 megohm is acceptable. Non-metallic items such as plastic vacuum hoses should be conductive and have a resistance to ground from any point of 100 megohm (108 ohm) or less. If the powder is pneumatically conveyed, nitrogen inerting should be considered. Additional precautions are required if a flammable vapor is present.

Housekeeping

Good housekeeping should be used when handling POLYOX™ powders to further reduce the risk of slipping hazards. If spilled, POLYOX™ polymers become wet, creating a potential slipping hazard on walking/working surfaces. If POLYOX™ powders are spilled, as much as possible should be swept or vacuumed up before they become wet. Washing with water, solvents, or most cleaning products probably will not be effective and may increase the slipping hazard. High pressure water blasting can be used to remove buildup of material. Scrubbing with Chlorine bleach, such as Clorox®, or with 10 percent soda ash (sodium carbonate) solution, and then rinsing thoroughly with water may help remove residual films of POLYOX™.

Storage

Water and heat can cause POLYOX™ to form lumps, so the polyethylene-coated fiber drums and FIBCs should be stored in a dry location at a temperature of less than 40°C (104°F). Samples stored for long periods of time (over six months at room temperature) should be evaluated by checking solution viscosity to confirm that they are still within the specification limits. Samples that are out of specification should be discarded.

Recommended Conditions

Temperature: Drums of POLYOX™ should not be stored next to steam lines or other hot surfaces. Ideal storage temperature should not exceed room temperature. Storage in a refrigerator or cold room will further extend product life.

Moisture: Exposure to water can cause clumping. Drums should be stored in dry areas. The lids of drums of POLYOX™ should be kept sealed to prevent absorption of atmospheric moisture.

Air Contact: Because exposure to oxygen causes degradation, drum lids should be sealed to limit air contact.