Gas barrier material and thermosetting resin composition

Patent metadata

Field	Value
Publication number	US-11261321-B2
Application number	US-201816465036-A
Country	US
Kind code	B2
Filing date	Feb 27, 2018
Priority date	Feb 28, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

Provided is a gas barrier material having superior gas barrier properties. This gas barrier material 1 comprises a matrix resin 2, and a carbon material 3 disposed in the matrix resin 2, wherein the carbon material 3 contains a partially exfoliated graphite having a structure in which graphite is partially exfoliated.

First claim

The invention claimed is:

1. A gas barrier material comprising
a matrix resin and
a carbon material disposed in the matrix resin,
the carbon material comprising a partially exfoliated graphite having a structure in which graphite is partially exfoliated, and
the partially exfoliated graphite being modified with a resin.

2. The gas barrier material according to claim 1 , wherein the content of the carbon material in the gas barrier material is 0.1 mass % or more and 10 mass % or less.

3. The gas barrier material according to claim 1 , wherein when y is the amount of methylene blue adsorbed (μmol/g) per g of the carbon material measured based on the difference between the absorbance of a methanol solution of methylene blue having a concentration of 10 mg/L and the absorbance of the supernatant obtained by putting the carbon material into the methanol solution of methylene blue followed by centrifugal separation, and x is the BET specific surface area (m 2 /g) of the carbon material, the ratio y/x is 0.15 or more, and the BET specific surface area of the carbon material is 25 m 2 /g or more and 2500 m 2 /g or less.

4. The gas barrier material according to claim 1 , wherein the matrix resin comprises a cured thermosetting resin.

5. The gas barrier material according to claim 4 , wherein the thermosetting resin is at least one selected from the group consisting of an epoxy resin, a urethane resin, a phenol resin, an unsaturated polyester resin, a polyimide resin, a melamine resin, a urea resin, a silicon resin, a benzoxazine resin, and an acrylic resin.

6. The gas barrier material according to claim 1 , wherein the matrix resin comprises a thermoplastic resin.

7. The gas barrier material according to claim 6 , wherein the thermoplastic resin is at least one selected from the group consisting of polyethylene terephthalate, polyethylene, polypropylene, a polyamide resin, polybutylene terephthalate, polyvinyl alcohol, an ethylene-vinyl alcohol copolymer resin, a polyvinyl formal resin, a polyvinyl butyral resin, polycarbonate, polyvinyl chloride, and polyvinylidene chloride.

8. The gas barrier material according to claim 1 , wherein the visible light transmittance of the gas barrier material is 5% or less.

9. A thermosetting resin composition for use in the gas barrier material, comprising
a liquid matrix resin and
a carbon material disposed in the liquid matrix resin
wherein the liquid matrix resin comprises an uncured thermosetting resin,
the carbon material comprises a partially exfoliated graphite having a structure in which graphite is partially exfoliated, and
the partially exfoliated graphite is modified with the resin.

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Suematsu Mikitoshi
• Fukui Hiroji
• Nakasuga Akira
• Nozato Shoji

Classifications

• C08K3/04

  Carbon · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C08J9/0061

  characterized by the use of several polymeric components · CPC title

• C08J2471/02

  Polyalkylene oxides · CPC title

• C08K2201/012

  Additives improving oxygen scavenging properties · CPC title