Optical layered body, method for producing optical layered body, polarizer and image display device

Patent metadata

Field	Value
Publication number	US-2016116644-A1
Application number	US-201614988909-A
Country	US
Kind code	A1
Filing date	Jan 6, 2016
Priority date	May 12, 2010
Publication date	Apr 28, 2016
Grant date	—

Abstract

The present invention provides an optical layered body which stably keeps light resistance such as ultraviolet resistance and oxidation resistance while keeping conventional physical properties and optical properties as the outermost surface material of an image display device, which is excellent in an antistatic property and which is capable of providing high image contrast when employed for an image display device. The optical layered body has a light transmitting substrate and a resin layer formed on one surface of the light transmitting substrate and is characterized in that the resin layer contains a binder resin, a polythiophene, an auxiliary conductive agent, and a leveling agent.

First claim

1 . An optical layered body having a light transmitting substrate and a resin layer formed on one surface of said light transmitting substrate,
wherein said resin layer comprises a binder resin, a polythiophene, an auxiliary conductive agent, and a leveling agent, and wherein a rough surface under coat layer is further formed between the light transmitting substrate and the resin layer.

2 . The optical layered body according to claim 1 , wherein the content of the polythiophene is 0.1 to 1.0 part by weight relative to 100 parts by weight of the binder resin.

3 . The optical layered body according to claim 1 , wherein the polythiophene is a complex with an anionic compound.

4 . The optical layered body according to claim 1 , wherein the auxiliary conductive agent is at least one member selected from the group consisting of chain-like metal oxide particles, carbon nanotubes, and conductive fine particles.

5 . The optical layered body according to claim 4 , wherein the auxiliary conductive agent is chain-like metal oxide particles and/or conductive fine particles and the content of said auxiliary conductive agent is 0.5 to 5.0 parts by weight relative to 100 parts by weight of the binder resin.

6 . The optical layered body according to claim 4 , wherein the auxiliary conductive agent is carbon nanotubes and the content of said auxiliary conductive agent is 0.001 to 0.13 parts by weight relative to 100 parts by weight of the binder resin.

7 . The optical layered body according to claim 1 , wherein the initial surface resistance value and the surface resistance value after a light resistance test of the resin layer are less than 1×10 12 Ω/□.

8 . The optical layered body according to claim 1 , wherein the resin layer further contains an additive having a protonic functional group.

9 . The optical layered body according to claim 8 , wherein the additive having a protonic functional group is epoxy acrylate.

10 . The optical layered body according to claim 1 , wherein the resin layer has an antiglare function.

11 . The optical layered body according to claim 1 , wherein the resin layer has a region containing no auxiliary conductive agent from the interface on the opposite side to the light transmitting substrate to 100 nm.

12 . A method for producing an optical layered body having a light transmitting substrate and a resin layer formed on one surface of said light transmitting substrate, wherein the method comprises a step of forming the resin layer using a resin layer composition comprising a binder resin, a polythiophene, an auxiliary conductive agent, a leveling agent, and a solvent.

13 . A polarizer having a polarizing element, wherein said polarizer has the optical layered body according to claim 1 , on a surface of said polarizing element.

14 . An image display device having the optical layered body according to claim 1 or the polarizer according to claim 13 on an outermost surface.

15 . The optical layered body according to claim 2 , wherein the polythiophene is a complex with an anionic compound.

16 . The optical layered body according to claim 2 , wherein the auxiliary conductive agent is at least one member selected from the group consisting of chain-like metal oxide particles.

17 . The optical layered body according to claim 3 , wherein the auxiliary conductive agent is at least one member selected from the group consisting of chain-like metal oxide particles.

18 . The optical layered body according to claim 2 , wherein the initial surface resistance value and the surface resistance value after a light resistance test of the resin layer are less than 1×10 12 Ω/□.

19 . The optical layered body according to claim 3 , wherein the initial surface resistance value and the surface resistance value after a light resistance test of the resin layer are less than 1×10 12 Ω/□.

20 . The optical layered body according to claim 4 , wherein the initial surface resistance value and the surface resistance value after a light resistance test of the resin layer are less than 1×10 12 Ω/□.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Eguchi Junya
• Kitamura Tasuku
• Ichikawa Yuki
• Kodama Takaski

Classifications

• G02B5/3025 Primary

  Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state (G02B5/3008, G02B5/3016 take precedence) · CPC title

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title

• G02B1/16 Primary

  having an anti-static effect, e.g. electrically conducting coatings · CPC title

• G02B1/11

  Anti-reflection coatings · CPC title

• G02B1/10

  Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence) · CPC title