Epoxy resin composition and preparation method thereof

The invention discloses an epoxy resin composition and a preparation method thereof. The epoxy resin composition is prepared from the following raw materials in parts by weight: 60-100 parts of epoxy resin, 6-15 parts of a toughening agent, 10-18 parts of nano filler, 1-2 parts of a silane coupling agent, 3-10 parts of a curing agent, 1-4 parts of an accelerant and 5-10 parts of a surfactant. Through resin adjustment and improvement, the dielectric property of the epoxy resin can be further improved and the curing time of the epoxy resin can be further shortened while the excellent comprehensive performance of the epoxy resin is maintained, so that the requirements of the epoxy resin in the fields of aerospace, light weight and the like are met. 本申请公开一种环氧树脂组合物及其制备方法，由包括以下重量份原料制得：环氧树脂60～100份、增韧剂6～15份、纳米填料10～18份、硅烷偶联剂1～2份、固化剂3～10份、促进剂1～4份、表面活性剂5～10份。通过树脂调整及改进，在保持环氧树脂优异综合性能的同时，可以进一步提高其介电性能和缩短其固化时间，满足其在航空航天、轻量化等领域的需求。