The Curing of Epoxy Resins (XIX) The Curing of Epoxy Resins with Diaminomaleonitrile and Its Derivatives

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  • ジアミノマレオニトリルおよびその誘導体によるエポキシ樹脂の硬化と硬化物の物性

Abstract

Diaminomalenonitrile (DAMN), its N-alkyl derivatives and its Schiff base were studied as latent curing agents for epoxy resin.<BR>The epoxy resin with such a curing agent in a dispersed state had a pot life longer than two months at room temperature and cured smoothly when heated above 150°C. The maximum glass-transition temperature (Tg) and cross-linking density (P (E') ) for cured epoxy resins with DAMN and its N-alkyl derivatives were shown when the molar ratio of epoxy group to the curing agent was 6 : 1, contrary to expection from the chemical structures of these curing agents. The epoxy resins cured with Schiff base of DAMN had very high Tg, e. g. 200°C and P (E') , though the maximum P (E') and Tg for the cured resin was at the molar ratio of 5 : 1, and 4 : 1, respectively. In the results, DAMN and its derivatives were shown to be good latent curing agents, but the structure of the cured resins with these curing agents were not clarified.

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