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Hydroxy Ethyl Fatty Amide Effect on the Perfomance Properties of Polyesteramide Resins Based on Acrylic Copolymers

SpecialChem / Feb 25, 2009

One of the major pollutants emitted by a surface coating is organic solvent used during processing and application. Hence, efforts have been made to develop alternative technologies that minimize the use of organic solvents in surface coatings. These include the use of coating curing agents derived from vegetable oils, which have been directly used to obtain coating films. Since these oils, by themselves, cannot directly meet the desired film properties, a number of oil modifications have been proposed such as alkyd, epoxy, polyesteramide, polyurethanes, polyurethaneamide, etc. The polyesteramide resins hold considerable application scope in the coatings field. A number of polyesteramides have been developed from different oils e.g., dehydrated castor oil, pilu fat, argemone, linseed, etc. The presence of repeating units of ester (-COOR) and amide (-NCOR) in the polymeric chain of polyesteramide (PEA) improves the ease of application, thermal stability, chemical and water resistance, and causes faster drying and enhanced hardness over normal alkyds. These polyesteramides have shorter curing times at elevated temperature, while considerably longer times at room temperature...

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