Eastman Effusion™ plasticizer can begin to crystallize and freeze at or below <20°C (68°F) and therefore requires heated storage tanks, heat?traced transfer lines, and pumps to prevent freezing and to facilitate transferring during cold weather. A storage temperature of 25°?27°C (77°?80°F) is recommended.
In colder climates, it is recommended that storage tanks be insulated and pumps and transfer piping be insulated and heat traced with self-regulating low?temperature heating cable. Insulating these storage tanks will also aid in conserving energy. When sizing transfer lines and pumps, the higher resistance to flow of this plasticizer should be taken into account. If moisture content of the ester is critical, the tank should be vented to the atmosphere through a desiccant dryer. An overpressure/vacuum relief device should be provided for the tank.
In the event the plasticizer partially or completely solidifies or, the storage tank, transfer lines, or pump containing the material should be heated gradually to prevent discoloration and or degradation of the plasticizer. The temperature should be raised a few degrees at a time to 30-37°C (87-97°F) and allowed to mix for 24 hours to ensure all solids and/or crystals have melted. It is important to understand that the composition and performance of this material will not change if it goes through a freeze/thaw cycle.