| 摘要 |
PROBLEM TO BE SOLVED: To obtain a thermosetting resin composition which gives a cured item having very low water absorption properties without detriment to its high heat resistance and low permittivity by incorporating a thermosetting resin and a liquid crystal polyester into the same. SOLUTION: Examples of the thermosetting resin are an epoxy resin, a cyanate resin, a phenol resin, and a melamine resin, an epoxy resin being preferable in terms of reactivity and handleability. A liquid crystal polyester which forms an anisotropic melt at 400 deg.C or lower is preferable, an example being one prepared from the combination of an aromatic dicarboxylic acid, an aromatic diol, and an aromatic hydroxycarboxylic acid. Preferably, a liquid crystal polyester in the form of a powder is mixed with other ingredients, and the average particle size of the powder is preferably 0.1-100μm. The compounding ratio by wt. of the thermosetting resin to the liquid crystal polyester is 100/(5-50). The thermosetting resin may contain a curing agent and a cure catalyst as required.
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