Polarizing plate composition, polarizing plate protective film, polarizer, polarizing plate, and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10254456-B2
Application number	US-201615254644-A
Country	US
Kind code	B2
Filing date	Sep 1, 2016
Priority date	Mar 5, 2014
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

A polarizing plate composition, a polarizing plate protective film, a polarizer, a polarizing plate, and a liquid crystal display device contain a compound represented by the following Formula (I).

In Formula (I), R represents a specific substituent, and each of EWG 1 and EWG 2 represents an electron-withdrawing group. EWG 1 and EWG 2 may form a ring by being bonded to each other. Here, there is no such case where EWG 1 and EWG 2 become the following group by being bonded to each other and form a ring by being bonded to a carbon atom substituted with R.

Each of Rx and Ry represents a hydrogen atom or a substituent. * represents a position of bonding to a carbon atom substituted with R.

First claim

What is claimed is:

1. A polarizing plate composition comprising a compound represented by the following
Formula (II),

in Formula (II), R represents a substituent which is not a group containing a phenolic hydroxyl group or an aromatic amino group; each of EWG 1a and EWG 2a independently represents a divalent electron-withdrawing group; and L represents a single bond or a divalent linking group.

2. The polarizing plate composition according to claim 1 ,
wherein each of EWG 1a and EWG 2a is a substituent having a Hammett's σp value of equal to or greater than 0.20.

3. The polarizing plate composition according to claim 1 ,
wherein each of EWG 1a and EWG 2a is —C(═O)—, —SO 2 —, —SO—, or *—P(═O)(ORb)O— in which * represents a position of bonding to a carbon atom to which R is bonded; and Rb represents a substituent.

4. The polarizing plate composition according to claim 1 ,
wherein an atom of L bonded to EWG 1a and EWG 2a is —C(R x1 )(R x2 )—, —N(Ra)—, —O—, or —S—, each of R x1 and R x2 is independently a hydrogen atom or a substituent, and Ra is a hydrogen atom or a substituent.

5. The polarizing plate composition according to claim 1 ,
wherein the compound represented by Formula (II) is represented by the following Formula (III),

in Formula (III), R has the same definition as R in Formula (II); EWG 1b represents —C(═O)—, —SO 2 —, —SO—, or *—P(═O)(ORb)O—; * represents a position of bonding to a carbon atom substituted with R; Rb represents a substituent; and L 1 represents a divalent linking group.

6. The polarizing plate composition according to claim 1 ,
wherein R is an alkyl group, an alkenyl group, a cycloalkyl group, a cycloalkenyl group, an aryl group, or a heterocyclic group.

7. The polarizing plate composition according to claim 1 ,
wherein the compound represented by Formula (II) is represented by the following Formula (IV),

in Formula (IV), R has the same definition as R in Formula (II); each of Y 1 and Y 2 independently represents —C(R x1 )(R x2 )—, —N(Ra)—, —O—, or —S—; each of R x1 and R x2 independently represents a hydrogen atom or a substituent; Ra represents a hydrogen atom or a substituent; L 2 represents a single bond or a divalent linking group bonding Y 1 and Y 2 to each other through 1 to 3 atoms; and Y 1 and Y 2 , Y 1 and L 2 , or Y 2 and L 2 may form a ring by being bonded to each other.

8. The polarizing plate composition according to claim 1 , further comprising cellulose acylate, polyvinyl alcohol, or acylated or ketalized polyvinyl alcohol.

9. The polarizing plate composition according to claim 8 ,
wherein provided that the total degree of acyl substitution of the cellulose acylate is denoted by A, A of the cellulose acylate satisfies the following expression
1.5≤ A≤ 3.0.

10. The polarizing plate composition according to claim 8 ,
wherein provided that an acyl group of the cellulose acylate is an acetyl group, and the total degree of acetyl substitution of the cellulose acylate is denoted by B, B of the cellulose acylate satisfies the following expression
2.0≤ B≤ 3.0.

11. The polarizing plate composition according to claim 1 , further comprising:
polyvinyl alcohol or acylated or ketalized polyvinyl alcohol; and
a metal compound colloid.

12. The polarizing plate composition according to claim 1 , further comprising:
polyvinyl alcohol or acylated or ketalized polyvinyl alcohol; and
a dichroic colorant.

13. A polarizing plate protective film composed of the polarizing plate composition according to claim 1 .

14. A polarizer composed of the polarizing plate composition according to claim 1 .

15. A polarizing plate comprising an adhesive layer or a pressure sensitive adhesive layer composed of the polarizing plate composition according to claim 1 .

16. A polarizing plate comprising the polarizing plate protective film according to claim 13 .

17. A polarizing plate comprising the polarizer according to claim 14 .

18. A liquid crystal display device comprising the polarizing plate according to claim 15 .

Assignees

• Fujifilm Corp

Inventors

• Shimoju Naoya
• Yoshida Aiko
• Nojiri Mayumi
• Naito Yu

Classifications

• B32B2255/10

  on synthetic resin layer or on natural or synthetic rubber layer · CPC title

• B32B2307/42

  Polarizing, birefringent, filtering · CPC title

• B32B23/04

  comprising such {cellulosic plastic} substance as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a glass layer B32B17/08)} · CPC title

• Y10T428/1041

  Cross-Sectional Technologies · mapped topic

• G02F1/133528

  Polarisers · CPC title