| abstract |
The invention provides an epoxy resin, which is a reaction product of 1,2,4-trihydroxybenzene and epihalohydrin (epihalohydrin), characterized in that the epoxy resin contains a cyclic compound having a cyclic structure The structure contains oxygen atoms derived from the 1 and 2 positions of 1,2,4-trihydroxybenzene as constituent atoms. The content of the above-mentioned cyclic compound is 0.003 to 0.070 mol relative to 100 g of the epoxy resin. This epoxy resin is excellent in thermal decomposition resistance in a liquid state. |