| abstract |
Epoxy resin represented by general formula (I), n nwherein n is an integer of 0 or more, n A 1 and A 2 are residue of divalent phenol, and A 1 and A 2 can be same or can be different and both R 1 and R 2 are H or n nwhich is synthesized from divalent phenol and epihalohydrine, and satisfies numerical formula (1), n n0.3≦ X/Y ≦2.0 formula (1) nwherein, X; epoxy equivalent (g/eq) Y; phenolic hydroxyl group equivalent (g/eq) further, amount of hydrolytic halogen is 0.05 wt. % or less. |