Prepreg, fiber-reinforced composite material, and molded article

1. A prepreg comprising:

carbon fibers; and

a resin composition comprising

an epoxy resin (A) having a biphenyl structure and two or more epoxy groups,

an epoxy resin (B) having two or more epoxy groups and having no biphenyl structure,

a curing agent, and

melamine cyanurate,

wherein

a content of chlorine atoms in the resin composition is 1% by mass or less,

a content of phosphorus atoms in the resin composition is 0.1% by mass or less,

a content of the epoxy resin (A) with respect to the total amount of the epoxy resin (A) and the epoxy resin (B) is 20% by mass or more and 40% by mass or less,

the total amount of the epoxy resin (A) and the epoxy resin (B) is 60% by mass or more and 75% by mass or less based on the total amount of the resin composition,

a content of the melamine cyanurate is 25% by mass or more and 40% by mass or less based on the total amount of the resin composition,

a content of the carbon fibers in the prepreg is 20% by mass or more and 90% by mass or less, and

the epoxy resin (A) comprises an epoxy resin represented by the formula (A-1):

wherein n is an integer of 1 or more.

2. A fiber-reinforced composite material obtained by laminating and curing a plurality of prepregs, wherein at least one of the prepregs is a prepreg according to claim 1 .

3. The fiber-reinforced composite material according to claim 2 , wherein a thickness in a laminating direction is 1.5 mm or less.

4. The fiber-reinforced composite material according to claim 2 , wherein a flame retardancy as evaluated by the UL94 burning test is V-0 or V-1.

5. A molded article comprising the fiber-reinforced composite material according to claim 2 .

6. A molded article comprising the fiber-reinforced composite material according to claim 3 .

7. A molded article comprising the fiber-reinforced composite material according to claim 4 .