the role of 2-ethyl-4-methylimidazole in powder coating formulations: a comprehensive review abstract: 2-ethyl-4-methylimidazole (2e4mi) is a heterocyclic organic compound increasingly utilized as a catalyst and curing agent in powder coating formulations. this article presents a comprehensive review of the properties, applications, and mechanisms of action of 2e4mi in powder coatings, particularly focusing on epoxy-based systems....