Patent ID: 8304473

Claim:
A carbon/epoxy resin composition comprising: about 45 volume percent to about 50 volume percent of an epoxy composition, based on a total volume of the carbon/epoxy resin composition, the epoxy composition including a bisphenol-based epoxy compound and an alicyclic epoxy compound; about 2.0 volume percent to about 3.1 volume percent of carbon black, based on a total volume of the carbon/epoxy resin composition; about 80 parts by volume to about 104 parts by volume of an acid anhydride-based curing agent, based on 100 parts by volume of the epoxy composition; and about 1 part by volume to about 3 parts by volume of a tertiary alkylamine-based curing catalyst selected from the group consisting of N,N-dimethyloctylamine, N,N-dimethylhexylamine, tri-n-propylamine, and a combination thereof, based on 100 parts by volume of the epoxy composition.