As the typical cycloaliphatic epoxy resin, TTA26 (bis ((3,4-epoxy cyclohexyl) methyl) adipate) has excellent weather resistance and electrical insulation, low curing shrinkage, good heat resistance, low viscosity and good toughness. It is widely used in the fields of composites, electrical insulation materials, electronic embedment materials, cationic curing resin raw materials, etc. It has similar electrical insulation and weather resistance to TTA21, but it shows good flexibility due to its increased molecular chain length. It is often used in combination with TTA21 to improve the toughness and other properties of the cured product. It is suitable for UV SLA, anhydride and thermal cation curing.