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Desmodur® E 210

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Desmodur E 210 prepolymer must be stored in tightly closed containers and protected from contamination with moisture and other foreign substances, which can adversely affect processing. It will react slowly with water to form urea and CO2 gas, which may cause sealed containers to expand and rupture. Partially filled containers should be blanketed with dry nitrogen. Storage temperatures should be maintained between 15° and 35°C (59° and 95°F). Under these conditions, Desmodur E 210 prepolymer will remain clear for periods of up to six months.

































Desmodur E 210 prepolymer must not be allowed to freeze. Exposure to temperatures less than 15°C (60°F), even for short periods of time, can result in the formation of solid material. During the winter months, appropriate precautions must be taken during shipment and storage. Prolonged storage of solid or partially solid Desmodur E 210 prepolymer may result in the formation of MDI dimer in amounts which exceed its solubility in the prepolymer at normal storage temperatures. This can make the product unusable. If solids should form because of exposure of Desmodur E 210 prepolymer to lower temperatures, it may be possible to reliquify the product by reheating. Use a well-ventilated oven for the minimum time necessary to render it clear. The temperature of the product should not exceed 60°C (140°F). Agitation or drum rollers are recommended to avoid excessive local heating, which will degrade the prepolymer. Significant amounts of MDI dimer may form during the heating process. As a result, the remelted prepolymer may be cloudy, and the processing behavior and properties of the final product may be affected.

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