The Role of 2-Ethyl-4-Methylimidazole as a Catalyst in Rigid Polyurethane Foam Production Abstract: Rigid polyurethane foams (RPUFs) are widely used materials in various applications, including insulation, packaging, and structural components. The efficient production of these foams relies heavily on the use of catalysts that accelerate the reaction between isocyanates and polyols. 2-Ethyl-4-methylimidazole (2E4MI) is an...