Transparent conductive film and method for producing transparent conductive film

• US 9,315,679 B2
• Filed: 04/24/2008
• Issued: 04/19/2016
• Est. Priority Date: 04/27/2007
• Status: Expired due to Fees

• Current Assignee: Kuraray Company Limited
• Original Assignee: Kuraray Company Limited
• Inventors: Kitano, Takahiro
• Primary Examiner(s): Miller, Daniel H
• Application Number:
  US12/597,802
• Publication Number:
  US 20100215985A1
• Time in Patent Office: 2,917 Days
• Field of Search: 428/408, 423/447.1, 423/447.2, 423/448, 977/742, 165/185
• US Class Current: 1/1
• CPC Class Codes: B05D 2601/20 used for non-pigmentation effect
• CPC Class Codes: B05D 7/04 to surfaces of films or sheets producing layered products by applying coatings of pasty or pulverulent plastics B29C41/00
• CPC Class Codes: C01B 2202/00 Structure or properties of carbon nanotubes
• CPC Class Codes: C01B 32/159 single-walled
• CPC Class Codes: C09D 5/24 Electrically-conducting paints conductive materials H01B1/00
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

Disclosed is a transparent conductive film containing a single-walled carbon nanotube and a fullerene.

Claims

1. A transparent conductive film, comprising:

a single-walled carbon nanotube; and

a fullerene directly bonded to an OH group,

wherein, when a surface resistivity after having kept the transparent conductive film at 80°

C. for 14 days is defined as R1 (Ω

/□

), and a surface resistivity before keeping the transparent conductive film at 80°

C. for 14 days as R0 (Ω

/□

), an increase ratio [(R1−

R0)/R0×

100] of a surface resistivity is 30 or less,

wherein the total light transmittance of the transparent conductive film is 80% or more and the surface resistivity of the transparent conductive film is 3000Ω

/□

or less.

2. The transparent conductive film as claimed in claim 1, comprising the single-walled carbon nanotube and the fullerene in an identical layer.

3. The transparent conductive film as claimed in claim 1, wherein a layer comprising the single-walled carbon nanotube and a layer comprising the fullerene are different.

4. The transparent conductive film as claimed in claim 3, wherein the layer comprising the fullerene is present on the layer comprising the single-walled carbon nanotube.

5. The transparent conductive film as claimed in claim 1, having a content of 10 to 1000 mass parts of the fullerene per 100 mass parts of the single-walled carbon nanotube.

6. The transparent conductive film as claimed in claim 1, wherein the fullerene has a polar group.

7. The transparent conductive film as claimed in claim 1, wherein the quantity of the hydroxyl groups is 5 to 30 groups per one molecule of the fullerene.

8. The transparent conductive film as claimed in claim 1, wherein the quantity of the hydroxyl groups is 8 to 15 groups per one molecule of the fullerene.

9. The transparent conductive film as claimed in claim 1, having a content of 20 to 100 mass parts of the fullerene per 100 mass parts of the single-walled carbon nanotube.

10. The transparent conductive film as claimed in claim 1, wherein the fullerene is C60.

11. The transparent conductive film as claimed in claim 1, which has a surface resistivity of 200Ω

/□

or less.

12. A method of making the transparent conductive film as claimed in claim 1, comprising preparing a transparent conductive film comprising the single-walled carbon nanotube and the fullerene directly bonded to an OH group.