Preparation of imidazole embedded polyurea microcapsule for latent curing agent

Abstract

Abstract The IZ‐PU microcapsule‐type curing agent was prepared by interfacial polymerization method. The shell‐core structure of the IZ‐PU microcapsules was demonstrated by IR and SEM. The core content and coating efficiency of the IZ‐PU microcapsules were analyzed by DSC test of the one‐component adhesive consisting of IZ‐PU microcapsules and epoxy resin. The results showed that the IZ‐PU microcapsules is a proper latent curing agent to epoxy resin, its latency at room temperature is longer than 30 days.