Patent ID: 7608336

Claim:
An epoxy resin composition, comprising an epoxy resin (a) and, as a curing agent, a polyamide resin (b) having the structure represented by the following Formula (1): wherein, l and m are averages, satisfying the following formula: m/(l+m)≧0.01; and l+m is a positive number of 2 to 200; Ar 1 represents a bivalent aromatic group; Ar 2 represents a phenolic hydroxyl group-containing bivalent aromatic group; Ar 3 represents: -ph(R 1 )n- or -ph(R 2 )n-X-ph(R 3 )n-, wherein, -ph(R 1 )n-, -ph(R 2 )n- and -ph(R 3 )n- represent respectively R 1 -substituted, R 2 -substituted and R 3 -substituted phenylene groups; n is an integer of 0 to 3; R 1 , R 2 and R 3 each independently represent a C1 to C3 alkyl group or a C1 to C3 alkoxy group; and X represents O, S, CO, SO 2 or a single bond, and being prepared by polycondensation of a phenolic hydroxy group containing aromatic dicarboxylic acid corresponding to Formula (1), an aromatic dicarboxylic acid having no phenolic hydroxy group corresponding to Formula (1) and an aromatic diamine corresponding to Formula (1), wherein the equivalence of the active hydrogen in the polyamide resin (b) is 0.7 to 1.2 equivalence relative to 1 equivalence of the epoxy group in the epoxy resin (a).