| 摘要 |
PURPOSE:To improve the heat resistance, heat shock resistance, strength, low shrinkage, etc., of a cured product, by mixing an epoxy resin containing a curing agent with a combination of a chopped fiber of a specified shape with inorganic particles of a specified particle diameter distribution. CONSTITUTION:The following two fillers are prepared: a chopped fiber (A) having a diameter of 3-15mum and a length in the range of 3-300mum and inorganic particles (B) having such a particle diameter distribution that the content of particles of a particle diameter <=10mum is equal to or greater than 90wt%, the content of particles of a particle diameter <=5mum is equal to or greater than 50wt%, and the average particle diameter is equal to or greater than 0.5mum, so that the volumes of the fillers may satisfy relationships I and II. Examples of the components A include chopped glass fiber and chopped carbon fiber. Examples of components B include silica and alumina. These two fillers are added to 100pts.vol. epoxy resin containing a curing agent (e.g., phthalic anhydride).
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