Composition for gas seal member and method for producing the same, gas seal member for high-pressure hydrogen equipment, and high-pressure hydrogen equipment

摘要

Provided is a composition for a gas seal member capable of forming a gas seal member for a high-pressure hydrogen device capable of sufficiently suppressing both the occurrence of protrusion breakage and the occurrence of blister breakage. The composition for a gas seal member of the present invention is a composition for a gas seal member used in a high-pressure hydrogen environment, wherein the composition for a gas seal member contains an elastomer and a fibrous carbon nanostructure. An aggregate of the fibrous carbon nanostructure in a cross section of the composition for a gas seal member, wherein the fibrous carbon nanostructure is contained in a proportion of 1 part by mass or more and 10 parts by mass or less per 100 parts by mass of the elastomer. And the volume fraction V (volume%) of the fibrous carbon nanostructure in the composition for a gas seal member satisfy the relational expression: 0 ≦ S / V ≦ 2.0. .