Patent ID: 7495060

Claim:
An epoxy resin composition comprising: an epoxy resin prior to curing, a non-clathrated curing agent reacting with an epoxy group of the epoxy resin to cure the resin, and a tetrakisphenol compound represented by a general formula (I) as a curing accelerator catalyst, wherein X represents (CH 2 )n, wherein n is 0, 1, 2 or 3, and R 1 to R 8 each represents hydrogen, a lower alkyl, a phenyl optionally substituted with halogen or C 1 -C 6 alkyl, a halogen or a C 1 -C 6 alkoxy, and wherein the content of said tetrakisphenol compound represented in formula (I) is a range from 0.001 to 0.025 mole based on 1 mole of the epoxy group.