Patent ID: 8470435

Claim:
An epoxy resin composition comprising: a sulfur-containing thermosetting component, (C) a urea compound, and (D) a dicyandiamide; wherein: the sulfur-containing thermosetting component is selected from the group consisting of: a reaction product (B-2) of (A) an epoxy resin and (B-1) an amine compound having at least one sulfur atom in its molecule; and a blend of (B-2) and one of (A) and (B-1); the content of (C) in the epoxy resin composition is 1 to 15% by mass; the epoxy resin composition has a gel time at 130° C. of less than or equal to 200 seconds; the epoxy resin composition does not contain a polyvinylacetal resin; and the epoxy resin composition has a sulfur atom content in the range of 1.17 to 7% by mass.