Polarizing plate, image display device, and polarizing plate protective film

Patent metadata

Field	Value
Publication number	US-10871597-B2
Application number	US-201816038639-A
Country	US
Kind code	B2
Filing date	Jul 18, 2018
Priority date	Jan 22, 2016
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

Provided are a polarizing plate including a polarizer and a polarizing plate protective film laminated on the polarizer, in which the polarizing plate protective film contains at least one compound represented by any one of General Formulas (1) to (3) and cellulose acylate; an image display device using the polarizing plate; and a polarizing plate protective film used for the polarizing plate,

and

R 7 —N═C═N—R 8   General Formula (3)

in which R 1 to R 8 represent a specific substituent.

First claim

What is claimed is:

1. A polarizing plate comprising:
a polarizer; and
a polarizing plate protective film laminated on the polarizer,
wherein the polarizing plate protective film contains at least one compound represented by any one of General Formulas (1) to (3), and cellulose acylate,

in General Formula (1), R 1 and R 2 represent an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an alkoxy group, an aryl carbonyl group, or a carbamoyl group, and R 3 represents an alkyl group, a cycloalkyl group, or an aryl group,

in General Formula (2), R 4 and R 5 represent an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an alkoxy group, an aryl carbonyl group, or a carbamoyl group, and R 6 represents an alkyl group, a cycloalkyl group, or an aryl group, and
R 7 —N═C═N—R 8   General Formula (3)

in General Formula (3), R 7 and R 8 represent an alkyl group, a cycloalkyl group, or an aryl group,
provided that in each of General Formulas (1) to (3), a carbon atom and a nitrogen atom which are shown to be linked to each other by a double bond are not ring-constituting atoms of a monocyclic ring.

2. The polarizing plate according to claim 1 ,
wherein in the polarizing plate protective film, a content of the compound represented by any one of General Formulas (1) to (3) is a total of 0.1 to 50 parts by mass with respect to 100 parts by mass of a content of the cellulose acylate.

3. The polarizing plate according to claim 1 ,
wherein at least one of R 1 , R 2 , or R 3 of General Formula (1) is an aryl group, at least one of R 4 , R 5 , or R 6 of General Formula (2) is an aryl group, and at least one of R 7 or R 8 of General Formula (3) is an aryl group.

4. The polarizing plate according to claim 3 ,
wherein at least two of R 1 , R 2 , or R 3 of General Formula (1) are aryl groups, at least two of R 4 , R 5 , or R 6 of General Formula (2) are aryl groups, and R 7 and R 8 of General Formula (3) are aryl groups.

5. The polarizing plate according to claim 3 ,
wherein the aryl group is a phenyl group.

6. The polarizing plate according to claim 1 ,
wherein the compound represented by any one of General Formulas (1) to (3) has a molecular weight of 250 or more.

7. The polarizing plate according to claim 1 ,
wherein the polarizing plate protective film contains at least one compound represented by General Formula (A),

in General Formula (A), R A1 and R A3 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, or an aromatic group, and R A5 represents a hydrogen atom or a substituent.

8. The polarizing plate according to claim 1 ,
wherein the polarizing plate protective film contains at least one compound represented by General Formula (I) or (II),
(X n1 —Z— R 1a ) m1   General Formula (I)

in General Formula (I), Z represents a benzene ring or a cyclohexane ring, X represents a group represented by General Formula (I-A-3), n1 is an integer of 2 to 6, R la represents a substituent, and m1 is an integer of 0 to 4,

in General Formula (I-A-3), R C7 to R C12 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an aryl carbonyl group, an alkoxy group, or an alkoxycarbonyl group, and * represents a bond, and

in General Formula (II), X has the same meaning as X in General Formula (I), n21 and n22 are integers of 1 to 5, R 21 and R 22 represent substituents, and m21 and m22 are integers of 0 to 4.

9. An image display device comprising:
the polarizing plate according to claim 1 .

10. A polarizing plate protective film comprising:
at least one compound represented by any one of General Formulas (1) to (3); and
cellulose acylate,

in General Formula (1), R 1 and R 2 represent an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an alkoxy group, an aryl carbonyl group, or a carbamoyl group, and R 3 represents an alkyl group, a cycloalkyl group, or an aryl group,

in General Formula (2), R 4 and R 5 represent an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an alkoxy group, an aryl carbonyl group, or a carbamoyl group, and R 6 represents an alkyl group, a cycloalkyl group, or an aryl group, and
R 7 —N═C═N—R 8   General Formula (3)

in General Formula (3), R 7 and R 8 represent an alkyl group, a cycloalkyl group, or an aryl group,
provided that in each of General Formulas (1) to (3), a carbon atom and a nitrogen atom which are shown to be linked to each other by a double bond are not ring-constituting atoms of a monocyclic ring.

Assignees

• Fujifilm Corp

Inventors

• Sano Naoki
• Fukagawa Nobutaka
• Tamura Akio

Classifications

• C08L1/10 Primary

  Esters of organic acids {, i.e. acylates} · CPC title

• B32B23/14

  characterised by containing special compounding ingredients · CPC title

• C08B3/06

  Cellulose acetate {, e.g. mono-acetate, di-acetate or tri-acetate} · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• G02B1/14 Primary

  Protective coatings, e.g. hard coatings · CPC title