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00177 TEMPERATURE EFFECTS ON POT LIFE OF EPOXY COATING SYSTEMS

Picture for 00177 TEMPERATURE EFFECTS ON POT LIFE
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Product Number: 51300-00177-SG
ISBN: 00177 2000 CP
Author: Paul M. Standa
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Climatic conditions, particularly temperature, can have a direct bearing upon the workable pot life of 2-pack epoxies. Pot life can vary from seconds up to 24 hours or more depending on chemistry. If for example, a formulation which has desired properties for a service condition has approximately a one hour pot life, the temperature at which the coating is stored prior to use (along with temperature during application) can have an effect of either increasing or decreasing its pot life. By understanding that heat is generated during the cross-linking of epoxies with amines, a study was conducted in which the storage temperature of both epoxy and amine was controlled along with controlling the temperature after mixing the two components. By varying the storage temperatures, it is possible to narrow down pot life ranges in order to give an applicator more pinpoint workable pot life times.
Climatic conditions, particularly temperature, can have a direct bearing upon the workable pot life of 2-pack epoxies. Pot life can vary from seconds up to 24 hours or more depending on chemistry. If for example, a formulation which has desired properties for a service condition has approximately a one hour pot life, the temperature at which the coating is stored prior to use (along with temperature during application) can have an effect of either increasing or decreasing its pot life. By understanding that heat is generated during the cross-linking of epoxies with amines, a study was conducted in which the storage temperature of both epoxy and amine was controlled along with controlling the temperature after mixing the two components. By varying the storage temperatures, it is possible to narrow down pot life ranges in order to give an applicator more pinpoint workable pot life times.
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