Electroconductive resin composition

Patent metadata

Field	Value
Publication number	US-9236163-B2
Application number	US-201013389017-A
Country	US
Kind code	B2
Filing date	Aug 5, 2010
Priority date	Aug 7, 2009
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

There is provided an electroconductive resin composition comprising: (a) a polyamide resin, (b) a polyphenylene ether resin, and (c) 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 composition has a high electroconductivity while upholding a high moldability, mechanical property and durability in the polyamide-polyphenylene ether resin.

First claim

The invention claimed is:

1. An electroconductive resin composition comprising:
(a) a polyimide resin,
(b) a polyphenylene ether resin, and
(c) 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 30 wherein D is an outer diameter the body-part and 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.

2. The electroconductive resin 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 mass or less.

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

5. The electroconductive resin composition according to claim 1 , wherein the (b) polyphenylene ether resin is a polyphenylene ether resin modified with a α,β-unsaturated carboxylic acid or a derivative thereof.

6. The electroconductive resin composition according to claim 1 , wherein the (a) polyamide resin is an aliphatic polyamide resin.

7. The electroconductive resin composition according to claim 1 , wherein the (a) polyamide resin is a polyamide resin obtained by a polycondensation of oxalic acid and a diamine having 4 to 12 carbon atoms.

Assignees

• Nakamura Ken
• Ube Industries

Inventors

• Nakamura Ken

Classifications

• C08L2666/22

  Macromolecular compounds not provided for in C08L2666/16 - C08L2666/20 · CPC title

• C08L2666/20

  Macromolecular compounds having nitrogen in the main chain according to C08L75/00 - C08L79/00; Derivatives thereof · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C01B31/022

  Chemistry & Metallurgy · mapped topic

• C08L71/12

  Polyphenylene oxides · CPC title