Polarizing plate protective film, polarizing plate, and display

Patent metadata

Field	Value
Publication number	US-10338277-B2
Application number	US-201514969443-A
Country	US
Kind code	B2
Filing date	Dec 15, 2015
Priority date	Dec 17, 2014
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

A polarizing plate protective film containing a compound represented by formula (I); a polarizing plate; and a display:

in formula (I), X represents a group of formula (I-A-1) or (I-A-2), L represents a single bond or a divalent linking group, Z represents an n-valent linking group, and n represents an integer of 2 or more; however, when n is 2, the case where L and Z each are simultaneously a single bond is excluded:

in formulae (I-A-1) and (I-A-2), R AC1 and R AC2 each independently represent an alkyl, cycloalkyl, aryl, or acyl group; however, the case where R AC1 and R AC2 bond to each other to form a ring is excluded; R AC3 to R AC6 each independently represent a hydrogen atom, or an alkyl, cycloalkyl, aryl, acyl, alkoxy, or alkoxycarbonyl group; and an asterisk (*) represents a bonding hand to form a bonding with L.

First claim

The invention claimed is:

1. A polarizing plate protective film containing a compound represented by any one of formulae (II-1) to (II-5):

wherein, in formula (II-1) or (II-5), X represents a group represented by any of formula (I-A-1) or (I-A-2); in formulae (II-2) to (II-4), X represents a group represented by formula (I-A-1); and wherein, in formula (II-1) to (II-5), n represents an integer of 2 or more; when n is 2, Z 2 represents a divalent linking group; when n is 3 or more, Z 2 represents an n-valent chain hydrocarbon group; when n is 2, Z 3 represents a divalent alkylene group; when n is 3 or more, Z 3 represents an n-valent chain hydrocarbon group; however, the case where Z 3 has a ring structure is excluded; R 1 to R 5 each independently represent a substituent; n1 and n2 each independently represent an integer of 2 to 6; n3 and n4 each independently represent an integer of 1 to 5; m1, m3, and m4 each independently represent an integer of 0 to 4; m2 represents an integer of 0 to 10,

wherein, in formulae (I-A-1) and (I-A-2), R AC1 and R AC2 each independently represent an alkyl group, a cycloalkyl group, an aryl group, or an acyl group; however, the case where R AC1 and R AC2 bond to each other to form a ring is excluded; R AC3 to R AC6 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an alkoxy group, or an alkoxycarbonyl group; at least two of R AC3 to R AC6 may bond to each other, to form a ring.

2. The polarizing plate protective film according to claim 1 , wherein the compound represented by any one of formulae (II-1) to (II-5) has at least one benzene ring.

3. The polarizing plate protective film according to claim 1 , wherein the compound has 2 to 4 pieces of X, and wherein the total number of carbon atoms in component parts other than X in the compound is 40 or less.

4. The polarizing plate protective film according to claim 1 , wherein when counted in terms of a minimal length, the number of atoms comprised in the linking group between any two of X's is 20 or less.

5. The polarizing plate protective film according to claim 1 , wherein Z 2 or Z 3 is any one or combination of —O—, —S—, —SO—, —SO 2 —, —C(═O)—, —OC(═O)—, —C(R 11 )(R 12 )—, >C<, (—OCH 2 CH 2 ) 2 C(CH 2 CH 2 O—) 2 , >C(R 13 )—, >N—, or —N(Ra)—, in which R 11 to R 13 each independently represent a hydrogen atom, an alkyl group, or an aryl group, and in which Ra represents a hydrogen atom, an alkyl group, an aryl group, or an acyl group.

6. The polarizing plate protective film according to claim 1 , wherein the polarizing plate protective film contains a cellulose acylate.

7. A polarizing plate, comprising:
a polarizing plate protective film on each side of a polarizer,
wherein the polarizing plate protective film comprises a compound represented by any one of formulae (II-1) to (II-5):

wherein, in formula (II-1) or (II-5), X represents a group represented by any of formulae (I-A-1) and (I-A-2); in formulae (II-3) or (II-4), X represents a group represented by any of formulae (I-A-1); and wherein, in formula (II-1) and (II-3) to (11-5), n represents an integer of 2 or more; when n is 2, Z 2 represents a divalent linking group; when n is 3 or more, Z 2 represents an n-valent chain hydrocarbon group; R 1 to R 5 each independently represent a substituent; n1 and n2 each independently represent an integer of 2 to 6; n3 and n4 each independently represent an integer of 1 to 5; m1, m3, and m4 each independently represent an integer of 0 to 4; m2 represents an integer of 0 to 10,

wherein, in formulae (I-A-1) and (I-A-2), R AC1 and R AC2 each independently represent an alkyl group, a cycloalkyl group, an aryl group, or an acyl group; however, the case where R AC1 and R AC2 bond to each other to form a ring is excluded; R AC3 to R AC6 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, an acyl group, an alkoxy group, or an alkoxycarbonyl group; at least two of R AC3 to R AC6 may bond to each other, to form a ring; and
wherein, in formula (II-2), X represents a group represented by formula (I-A-1); and n represents an integer of 2 or more; when n is 2, Z 3 represents a divalent alkylene group; when n is 3 or more, Z 3 represents an n-valent chain hydrocarbon group; however, the case where Z 3 has a ring structure is excluded.

8. The polarizing plate according to claim 7 , containing a compound represented by formula (A) in at least one polarizing plate protective film, with the polarizing plate protective films being provided on each side or one side of the polarizer:

wherein, in formula (A), R A1 and R A3 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, or an aromatic group; the alkyl group, the cycloalkyl group, the alkenyl group, and the aromatic group may have a substituent; and R A5 represents a hydrogen atom or a substituent.

9. A display containing at least one polarizing plate according to claim 7 .

Assignees

• Fujifilm Corp

Inventors

• Yoshida Aiko
• Shimoju Naoya
• Sano Naoki
• Fukagawa Nobutaka

Classifications

• G02F1/133528

  Polarisers · CPC title

• G02B1/14 Primary

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

• G02B5/305

  including organic materials, e.g. polymeric layers · CPC title

• G02F2201/50

  Protective arrangements · CPC title