| 摘要 |
PURPOSE:To obtain a pressure-moldable epoxy resin composition good in transparency and impact resistance and excellent in molding properties, by mixing a specified mixed epoxy resin with an acid anhydride curing agent and a dibenzylidenesorbitol. CONSTITUTION:An epoxy resin composition comprising a mixed epoxy resin (a) comprising 50-80pts.wt. bisphenol A epoxy resin of a m.p. of 60-170 deg.C and 20-50pts.wt. triglycidyl isocyanurate or its derivative, 30-150pts.wt. acid anhydride curing agent (b) and 0.1-5.0pts.wt. dibenzylidenesorbitol (c). As said bisphenol A epoxyresin, one which is solid at room temperature and has a m.p. of, usually, 60-170 deg.C is used. In order to enhance the rate of production in molding, said resin composition is partially reacted to B stage by suitable heat aging during the production of the composition.
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