Polarizing plate protective film, polarizing plate and display device

Patent metadata

Field	Value
Publication number	US-9817156-B2
Application number	US-201615083861-A
Country	US
Kind code	B2
Filing date	Mar 29, 2016
Priority date	Mar 30, 2015
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A polarizing plate protective film contains a compound represented by general formula (I). In general formula (I), X is a group containing a boronic acid ester structure, and a plurality of Xs may be identical or different; L represents a single bond or a divalent linking group, and a plurality of Ls may be identical or different; n represents an integer of 2 or more; when n is 2, Z represents a single bond or a divalent group, and when n is 3 or more, Z represents a group having a valence of n, provided that L and Z are not simultaneously single bonds when n is 2.

First claim

What is claimed is:

1. A polarizing plate protective film comprising:
a compound represented by general formula (I):

[in general formula (I),
X is a group represented by general formula (I-B), and a plurality of Xs may be identical or different;
L represents a single bond or a divalent linking group, and a plurality of Ls may be identical or different;
n represents an integer of 2 or more;
when n is 2, Z represents a single bond or a divalent group, and when n is 3 or more, Z represents a group having a valence of n, provided that L and Z are not simultaneously single bonds when n is 2;

(in general formula (I-B),
R A and R B each independently represent an alkyl group, a cycloalkyl group, an aryl group or an acyl group, and R A and R B may be taken together to form a ring; and
* indicates a bonding arm which is bonded to L)].

2. The polarizing plate protective film according to claim 1 , wherein the compound represented by general formula (I) is represented by any one of general formulas (II-1) to (II-5):

(in general formulas (II-1) to (II-5),
definitions of X and n are identical to those of X and n in general formula (I);
when n is 2, Z 2 represents a divalent linking group and when n is 3 or more, Z 2 represents a linking group having a valence of n;
when n is 2, Z 3 represents a divalent alkylene group and when n is 3 or more, Z 3 represents an alkylene group having a valence of n, provided that Z 3 does not have a ring structure;
R 1 to R 5 each independently represent a substituent, and in a case where a plurality of R 1 s to R 5 s are present, the plurality of R 1 s to R 5 s may be identical or different;
n1 and n2 each represent an integer of 2-6;
n3 and n4 each independently represent an integer of 1-5; and
m1, m2, m3 and m4 each independently represent an integer of 0-4).

3. The polarizing plate protective film according to claim 1 , wherein the compound represented by general formula (I) has at least one benzene ring.

4. The polarizing plate protective film according to claim 2 , wherein the compound represented by general formula (I) has at least one benzene ring.

5. The polarizing plate protective film according to claim 1 , wherein the compound represented by general formula (I) has 2 to 4 Xs and a total number of carbon atoms in a constituent moiety other than the Xs is 40 or less.

6. The polarizing plate protective film according to claim 2 , wherein the compound represented by general formula (I) has 2 to 4 Xs and a total number of carbon atoms in a constituent moiety other than the Xs is 40 or less.

7. The polarizing plate protective film according to claim 1 , wherein a number of atoms in a shortest linking path linking any two of Xs in the compound represented by general formula (I) is 20 or less.

8. The polarizing plate protective film according to claim 2 , wherein a number of atoms in a shortest linking path linking any two of Xs in the compound represented by general formula (I) is 20 or less.

9. The polarizing plate protective film according to claim 1 , wherein in general formula (I),
Z is any one of or any combination of a single bond, —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—, and —N(Ra)—;
R 11 to R 13 each independently represent a hydrogen atom, an alkyl group or an aryl group; and
Ra represents a hydrogen atom, an alkyl group, an aryl group or an acyl group.

10. The polarizing plate protective film according to claim 2 , wherein in general formula (I),
Z is any one of or any combination of a single bond, —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—, and —N(Ra)—;
R 11 to R 13 each independently represent a hydrogen atom, an alkyl group or an aryl group; and
Ra represents a hydrogen atom, an alkyl group, an aryl group or an acyl group.

11. The polarizing plate protective film according to claim 1 , further comprising cellulose acylate.

12. The polarizing plate protective film according to claim 2 , further comprising cellulose acylate.

13. A polarizing plate comprising:
a polarizer; and
one or more polarizing plate protective films formed on one or both sides of the polarizer,
wherein at least one of the one or more polarizing plate protective films is the polarizing plate protective film according to claim 1 .

14. A polarizing plate comprising:
a polarizer; and
one or more polarizing plate protective films formed on one or both sides of the polarizer,
wherein at least one of the one or more polarizing plate protective films is the polarizing plate protective film according to claim 2 .

15. The polarizing plate according to claim 13 , wherein the at least one of the one or more polarizing plate protective films contains a compound represented by general formula (A):

(in general 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, and the alkyl group, the cycloalkyl group, the alkenyl group and the aromatic group may each have a substituent; and
R A5 represents a hydrogen atom or a substituent).

16. The polarizing plate according to claim 14 , wherein the at least one of the one or more polarizing plate protective films contains a compound represented by general formula (A):

(in general 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, and the alkyl group, the cycloalkyl group, the alkenyl group and the aromatic group may each have a substituent; and
R A5 represents a hydrogen atom or a substituent).

17. The polarizing plate according to claim 13 , wherein the compound represented by general formula (I) included in the polarizing plate protective film among the one or more polarizing plate protective films is contained in an amount of 1-100 parts by weight with respect to 100 parts by weight of the polarizer.

18. The polarizing plate according to claim 14 , wherein the compound represented by general formula (I) included in the polarizing plate protective film among the one or more polarizing plate protective films is contained in an amount of 1-100 parts by weight with respect to 100 parts by weight of the polarizer.

19. A display device comprising:
at least one polarizing plate according to claim 13 .

20. A display device comprising:
at least one polarizing plate according to claim 14 .

Assignees

• Fujifilm Corp

Inventors

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

Classifications

• G02B1/14 Primary

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

• G02B5/305

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