Resin composition, method for producing resin composition, and molded article

A resin composition, comprising:

• a thermoplastic resin (A);
• a thermoplastic resin (B) different from the thermoplastic resin (A);
• and
• a polar resin (C),
• wherein
• the thermoplastic resin (A) is a hydrogenated product of a block copolymer consisting of at least one having a block (A-1) containing more than 70 mol % of an aromatic vinyl monomer unit and at least one block (A-2) containing 30 mol % or more of a conjugated diene monomer unit,
• the block (A-2) has a hydrogenation rate of 86 to 99 mol %,
• the thermoplastic resin (B) has at least one of a reactive functional group and a monomer unit containing a hetero atom, and the thermoplastic resin (B) is a modified product obtained by modifying a block copolymer having a polymer block (B-1) derived from an aromatic vinyl compound and a polymer block (B-2) derived from a conjugated diene compound or a hydrogenated product thereof with a compound having the reactive functional group, or a modified product obtained by modifying an olefin-based resin with a compound having the reactive functional group, and
• with respect to the total mass of the resin composition, the content of the thermoplastic resin (A) is 1 to 30% by mass, the content of the thermoplastic resin (B) is 1 to 30% by mass, and the content of the polar resin (C) is 40 to 98% by mass, and
• wherein when the resin composition is molded to form an article, the thermoplastic resin (A) and the thermoplastic resin (B) are dispersed in the polar resin (C) as a core-shell structure having a core of the thermoplastic resin (A) and a shell of the thermoplastic resin (B) and a dispersion diameter D(A) of the thermoplastic resin (A) and a dispersion diameter D(B) of the thermoplastic resin (B) satisfy a relationship D(A)<D(B).