Curable composition, adhesive, method of producing fiber-reinforced composite material, and fiber-reinforced composite material

A curable composition, comprising:

• a polymerizable compound (A) which is one or more compounds selected from the group consisting of an epoxy compound (A1) and a vinyl ether compound (A2);
• a reactive compound (B) which is one or more compounds selected from the group consisting of a compound (B1) having one or more functional groups selected from a hydroxyl group and a carboxyl group and a polyvalent carboxylic anhydride (B2);
• a compound (C) represented by the following formula (C1);
• and
• a compound (D) represented by the following formula (D1),
• wherein in the formula (C1), Rc1, Rc2, and Rc3 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a mercapto group, a sulfide group, a silyl group, a silanol group, a nitro group, a nitroso group, a sulfonate group, a phosphino group, a phosphinyl group, a phosphonate group, or an organic group;
• Rc4 and Rc5 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a mercapto group, a sulfide group, a silyl group, a silanol group, a nitro group, a nitroso group, a sulfino group, a sulfo group, a sulfonate group, a phosphino group, a phosphinyl group, a phosphono group, a phosphonate group, or an organic group;
• and Ar represents an aromatic group which may have a substituent,
• wherein in the formula (D1), Rd1 represents an aliphatic hydrocarbon group having 1 to 10 carbon atoms which may have a substituent or an aryl group which may have a substituent;
• Rd2 represents an aliphatic hydrocarbon group having 1 to 10 carbon atoms or an aryl group which may have a substituent;
• Rd3 represents a hydrogen atom or a group represented by —CO—Rd5;
• Rd5 represents an alkyl group having 1 to 6 carbon atoms or an aryl group which may have a substituent;
• and p represents 0 or 1.