Composite resin material and molded article

Patent metadata

Field	Value
Publication number	US-10920059-B2
Application number	US-201816631959-A
Country	US
Kind code	B2
Filing date	Jul 20, 2018
Priority date	Jul 21, 2017
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

An object of the present invention is to provide a resin material that yields a resin molded article which has not only a low volume resistivity but also excellent weldability and cleanliness and whose volume resistivity is unlikely to be increased even when subjected to an SPM cleaning treatment and the like. The present invention provides a composite resin material that contains a modified polytetrafluoroethylene and carbon nanotubes and has an average particle diameter of 500 μm or smaller.

First claim

The invention claimed is:

1. A composite resin material, comprising
a modified polytetrafluoroethylene and carbon nanotubes,
wherein the composite resin material has an average particle diameter of 500 μm or smaller, and
wherein the composite resin material comprises the carbon nanotubes in an amount of 0.01 to 2.0% by mass based on a total amount of the composite resin material, and
wherein the modified polytetrafluoroethylene is a compound comprising:
a tetrafluoroethylene unit represented by the following Formula (I):
—CF 2 —CF 2 —  (I); and

a perfluorovinyl ether unit represented by the following Formula (II):

wherein X represents a perfluoroalkyl group having 1 to 6 carbon atoms, or a perfluoroalkoxyalkyl group having 4 to 9 carbon atoms, and
the perfluorovinyl ether unit represented by Formula (II) is contained in the modified polytetrafluoroethylene in an amount of 0.01 to 1% by mass based on a total mass of the modified polytetrafluoroethylene,
wherein the modified polytetrafluoroethylene has a crystallization heat of from 16 J/g to 25 J/g, and
wherein the modified polytetrafluoroethylene has a melting point of from 300 to 380° C.

2. The composite resin material according to claim 1 , having a specific surface area of 0.5 to 9.0 m 2 /g as measured by a BET method.

3. The composite resin material according to claim 1 , having a volume resistivity of 10 11 Ω·cm or lower as measured in accordance with JIS K6911.

4. A molded article produced using the composite resin material according to claim 1 .

5. A molded article, which is a compression-molded product of the composite resin material according to claim 1 .

6. The molded article according to claim 4 , having a shape selected from the group consisting of a plate shape, a rod shape, a film shape, a sheet shape, an aggregate shape, and a tubular shape.

7. The molded article according to claim 5 , having a shape selected from the group consisting of a plate shape, a rod shape, a film shape, a sheet shape, an aggregate shape, and a tubular shape.

Assignees

• Toho Kasei Co Ltd
• Taiyo Nippon Sanso Corp

Inventors

• Yamamoto Hirokazu
• Nakagawa Takafumi
• Itami Hirotaka
• Noguchi Isamu
• Takada Katsunori
• KODA Yasuhito
• Sakai Toru

Classifications

• C08L27/22

  modified by chemical after-treatment · CPC title

• C08L27/18 Primary

  Homopolymers or copolymers or tetrafluoroethene · CPC title

• C08K3/041 Primary

  Carbon nanotubes · CPC title

• C08F214/26

  Tetrafluoroethene · CPC title

• B29C43/003

  characterised by the choice of material · CPC title