| 摘要 |
[PROBLEMS] To provide an aluminum chelate type latent curing agent which can cure thermosetting epoxy resins at relatively low temperatures in short time and a process for producing aluminum chelate type curing agents which enable relatively easy control of the curing conditions. [MEANS FOR SOLVING PROBLEMS] A latent curing agent comprising a porous resin obtained by interfacial polymerization of a polyfunctional isocyanate compound and an aluminum chelate supported on the porous resin. When the latent curing agent is used for a curable epoxy resin composition for DSC, the exothermic peak temperature in DSC of the composition containing the curing agent with the pretreatment of the agent by immersion in a nonaqueous polar solvent can be enhanced to a level higher than the exothermic peak temperature in DSC of the composition containing the curing agent without the pretreatment of the agent by immersion in a nonaqueous polar solvent.
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