Composition for gas seal member and gas seal member

Patent metadata

Field	Value
Publication number	US-10717850-B2
Application number	US-201615736915-A
Country	US
Kind code	B2
Filing date	Jun 24, 2016
Priority date	Jun 26, 2015
Publication date	Jul 21, 2020
Grant date	Jul 21, 2020

Abstract

Provided is a composition for a gas seal member that can form a gas seal member capable of sufficiently suppressing both the occurrence of overflow fracture and the occurrence of blister fracture. The disclosed composition for a gas seal member is a composition for a gas seal member that contains an elastomer and a fibrous carbon nanostructure. The fibrous carbon nanostructure includes single-walled carbon nanotubes and the fibrous carbon nanostructure is contained in a proportion of at least 0.1 parts by mass and no greater than 12 parts by mass per 100 parts by mass of elastomer.

First claim

The invention claimed is:

1. A composition for a gas seal member containing an elastomer and a fibrous carbon nanostructure, wherein
the fibrous carbon nanostructure includes single-walled carbon nanotubes, and the fibrous carbon nanostructure is included in a proportion of at least 0.1 parts by mass and no greater than 12 parts by mass per 100 parts by mass of the elastomer,
the fibrous carbon nanostructure including single-walled carbon nanotubes have not undergone an opening formation treatment of carbon nanotubes and exhibits a convex upward shape in a t-plot obtained from an adsorption isotherm, and
each carbon nanotube has an open end and a closed end.

2. The composition for a gas seal member according to claim 1 , wherein a bending point of the t-plot is in a range of 0.2≤t (nm)≤1.5.

3. The composition for a gas seal member according to claim 1 , wherein a total specific surface area S1 and an internal specific surface area S2 obtained from the t-plot satisfy 0.05≤S2/S1≤0.30.

4. The composition for a gas seal member according to claim 1 , wherein an average diameter of the fibrous carbon nanostructure is at least 2 nm and no greater than 10 nm.

5. The composition for a gas seal member according to claim 1 , further comprising a crosslinking agent.

6. A gas seal member formed by using the composition for a gas seal member according to claim 1 .

7. The gas seal member according to claim 6 used while being in contact with a high pressure gas of at least 10 MPa.

8. High pressure gas equipment, comprising:
a container filled with a high pressure gas of at least 10 MPa; and
a gas seal member according to claim 6 being in contact with the high pressure gas filled in the container.

Assignees

• Zeon Corp

Inventors

• Takeyama Yoshihisa

Classifications

• C08K3/041 Primary

  Carbon nanotubes · CPC title

• Y02E60/32

  Hydrogen storage · CPC title

• C09K2003/1068

  Crosslinkable materials · CPC title

• C09K3/1028 Primary

  Fibres · CPC title

• F17C13/06

  Closures, e.g. cap, breakable member ({for autoclaves B01J3/03}; closures for {large} containers in general B65D {B65D90/54}; {for pressure vessels in general F16J13/00}) · CPC title