Epoxy resin based on spirosilafluorene as skeleton and preparation method and application thereof

The invention provides epoxy resin based on spirosilafluorene as a framework and a preparation method of the epoxy resin. The epoxy resin has a structure as shown in a formula (1), wherein n is a natural number; r1 is a hydrogen atom, a halogen atom, an aliphatic group, a halogenated aliphatic group, an alkoxy group or a siloxy group; and R2 is a heterocyclic group, an aromatic ring group or an alicyclic group. Due to the special rigid structure of spirosilafluorene, the novel epoxy resin disclosed by the invention has higher glass transition temperature, and can improve the humidity and heat resistance of a cured product; meanwhile, the introduction of silicon atoms can effectively improve the high temperature resistance of the epoxy resin. The method has the advantages of few synthesis steps, simple reaction operation, convenient post-treatment and easy realization of industrial production. 本发明提供一种基于螺硅芴为骨架的环氧树脂及其制备方法。所述环氧树脂具有如式(1)所示结构：其中，n为自然数；R1为氢原子、卤素原子、脂肪族基、卤代脂肪族基、烷氧基、硅氧基；R2为杂环基、芳环基、脂环基。由于螺硅芴特殊的刚性结构，本发明新