| 摘要 |
PURPOSE:To provide the titled composition composed of a phenolic novolac epoxy resin and 4,4'-diaminodiphenylsufone, and giving a carbon fiber-reinforced plastic having excellent heat resistance and water resistance. CONSTITUTION:The objective composition is composed of a phenolic novolac epoxy resin and 4,4'-diaminodiphenylsulfone as a hardener. The amount of the sulfone compound is preferably 0.8-1.1 equivalent per 1 equivalent of epoxy group. The water resistance and the elastic modulus of the composition can be further improved by adding preferably 20-50pts.wt., based on 100pts.wt. of the epoxy resin excluding the 4,4'-diaminodiphenylsulfone component, of a brominated epoxy resin (having a Br content of preferably 16-50wt%) to the composition.
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