Conductive resin composition

Patent metadata

Field	Value
Publication number	US-9234080-B2
Application number	US-201013262150-A
Country	US
Kind code	B2
Filing date	Apr 1, 2010
Priority date	Apr 2, 2009
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

There is disclosed a conductive resin composition, comprising: (a) a resin component, and (b) a fine carbon fiber dispersed in the resin component, wherein a graphite-net plane consisting solely of carbon atoms forms a temple-bell-shaped structural unit comprising closed head-top part and body-part with open lower-end, 2 to 30 of the temple-bell-shaped structural units are stacked sharing a common central axis to form an aggregate, and the aggregates are connected in head-to-tail style with a distance to form the fiber. The resin composition has high conductivity while maintaining the original physical properties of the resin.

First claim

The invention claimed is:

1. A conductive resin composition, comprising:
(a) a resin component, and
(b) a fine carbon fiber dispersed in the resin component, wherein a graphite-net plane consisting solely of carbon atoms forms a temple-bell-shaped structural unit comprising closed head-top part and body-part with open lower-end where an angle θ formed by a generatrix of the body-part and a fiber axis is less than 15°, 2 to 30 of the temple-bell-shaped structural units are stacked sharing a common central axis to form an aggregate having an aspect ratio (L/D) of 2 to 150 wherein an end of the body-part of the aggregate has an outer diameter D of 5 to 40 nm and an inner diameter d of 3 to 30 nm and wherein L is a length of the aggregate, and the aggregates are connected in head-to-tail style with a distance by van der Waals force to form the fine carbon fiber;
wherein an amount of the fine carbon fibers is 0.1% by weight or more and less than 40% by weight, based on the total weight of the composition, and the resin component comprises a resin selected from the group consisting of thermoplastic resins, elastomers, thermosetting resins, photo- and electron-beam curable resins and reactive resins.

2. The composition according to claim 1 , wherein the fine carbon fiber is produced by vapor phase growth using a catalyst containing an element selected from the group consisting of Fe, Co, Ni, Al, Mg and Si, and an ash content in the fine carbon fiber is 4% by weight or less.

3. The composition according to claim 1 , wherein the fine carbon fiber is a fine short carbon fiber in which 100 or less of the aggregates are connected.

4. The composition according to claim 3 , wherein the fine short carbon fibers are produced by fiber shortening by applying shear stress.

5. The composition according to claim 1 , wherein the resin component is selected from thermoplastic resins.

6. The composition according to claim 5 , wherein the resin component is a polyamide.

7. A conductive binder comprising the composition according to claim 1 and a carbon material having a structure configuration, whereby forming a composite material.

8. An electrode for an electrical charge storage device comprising the conductive binder according to claim 7 .

9. An electrical charge storage device comprising the electrode for an electrical charge storage device according to claim 8 .

10. The composition according to claim 1 , wherein the resin component comprises
(i) a thermoplastic resin selected from the group consisting of polyolefin resins, polyamide resins, polyvinyl resins, polyester resins, polyether resins, fluororesins, and mixture of two or more of these,
(ii) a thermoplastic elastomer selected from the group consisting of olefin-, styrene-, ester-, amide-, urethane- and polybutadiene-based elastomers,
(iii) a biodegradable resin, or
(iv) a thermosetting resin selected from the group consisting of phenol resins, amino resins, unsaturated polyester resins, polyimide resins, polyurethane resins, epoxy resins and silicone resins.

Assignees

• Yoshitake Hideya
• Nishio Masayuki
• Matsuura Tsunao
• Fukuda Kenji
• Nakamura Ken
• Koyashiki Keiichirou
• Yoshio Masaki
• Takemoto Hirofumi
• Ube Industries

Inventors

• Yoshitake Hideya
• Nishio Masayuki
• Matsuura Tsunao
• Fukuda Kenji
• Nakamura Ken
• Koyashiki Keiichirou
• Yoshio Masaki
• Takemoto Hirofumi

Classifications

• B01J2235/15

  X-ray diffraction · CPC title

• B01J35/70

  characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B01J37/03

  Precipitation; Co-precipitation · CPC title

• B01J23/78

  with alkali- or alkaline earth metals · CPC title