2-Phenylimidazole as a Primary Curing Agent for High-Temperature Epoxy Applications Abstract: 2-Phenylimidazole (2-PI) has emerged as a significant latent curing agent for epoxy resins, particularly in high-temperature applications. This article provides a comprehensive overview of 2-PI as a primary curing agent, focusing on its synthesis, curing mechanism, advantages, limitations, formulation considerations, product parameters, and performance...