Synthesis and preparation of an aqueous dispersion of epoxy-urethane usedin electrodeposition coatings

The use of water-based coatings is increasing due to their low odor, non-toxicity, environmentalfriendliness, and non-flammability. The electrodeposition method (ED) is widely used for coatingapplications, particularly in applying primer layers in the automotive industry. This method is highlyfavored because it effectively coats distant points and creates a surface free of defects, which hasattracted significant interest. In the automotive industry, epoxy-urethane resin is commonly used forED coating. This research aims to synthesize suitable resins for use in the ED method and investigatefactors affecting resin stability, including resin type, type of amine used, and amount of isocyanate.It was observed that substituting diethanolamine for diethylamine significantly enhances emulsionstability.

کلیدواژه ها:

Coating ، Epoxy-urethane resin ، Cathodic elecrodeposition