| 摘要 |
PROBLEM TO BE SOLVED: To provide epoxy resin compositions which are excellent in heat stability without curing in the cylinder of an injection molding machine and have curing characteristics of a latent type to quickly advance curing reaction in a die and enable continuous injection molding. SOLUTION: Epoxy resin compositions comprise (A) an epoxy resin, (B) a curing agent, and (C) a curing accelerator composed of a urea compound to be obtained by reacting a substituted or non-substituted phenylene diisocyanate with imidazole or an imidazole derivative in which one or two hydrogen atoms bound with the carbon atoms constituting the imidazole ring have been substituted with a 1-4C alkyl group or an acid-treated product of the urea compound.
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