RESIN COMPOSITION, PRODUCTION METHOD FOR SAME, RUBBER COMPOSITION COMPRISING RESIN COMPOSITION, GAS BARRIER FILM COMPRISING SAME, AND TYRE COMPRISING GAS BARRIER FILM

The present invention relates to a resin composition comprising: a base resin comprising a petroleum resin of which at least a part is hydrogenated or non-hydrogenated; and an additive comprising a modified C9 polymer having a structure in which a molecular weight modifier binds to at least one terminal of the two terminals of the petroleum resin of which at least a part is hydrogenated or non-hydrogenated. The present invention also relates to a gas barrier film comprising the resin composition, and a tire.