2-methylimidazole as a co-catalyst in specific polyurethane foam formulations: a comprehensive review abstract: this article provides a comprehensive review of the role of 2-methylimidazole (2-mi) as a co-catalyst in specific polyurethane (pu) foam formulations. while tertiary amines are commonly employed as catalysts in pu foam production, 2-mi offers a unique combination of reactivity and selectivity,...