Thermoplastic elastomer composition and extruded article

Abstract

The present invention relates to a thermoplastic elastomer composition comprising: (1) a component A, which is a block copolymer containing a polymer block a and a polymer block b, wherein the polymer block a contains a structural unit derived from an aromatic vinyl compound, the polymer block b contains a structural unit derived from a conjugated diene compound, and the hydrogenation rate of the polymer block b is 80% or more; (2) a component B, which is an olefin-based polymer; and (3) a hydrogenated product of a polybutene. The content of the component B is 1-50 parts by mass with respect to 100 parts by mass of the component A. The present invention provides: an extruded article that can achieve both gas barrier properties and ozone resistance; and a thermoplastic elastomer composition from which said extruded article can be obtained.