Functional film, polarizing plate, and display device

Patent metadata

Field	Value
Publication number	US-10836895-B2
Application number	US-201816229320-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Jun 27, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

The present invention provides a functional film including a copolymer that contains a repeating unit represented by Formula (I) and a repeating unit represented by Formula (II) shown in the description, or a crosslinked reaction product derived from the copolymer; a polarizing plate having this functional film; and a display device.

First claim

What is claimed is:

1. A polarizing plate comprising, in order:
a polarizer;
an adhesive layer; and
a functional film comprising:
a copolymer including a repeating unit represented by formula (I), and a repeating unit represented by formula (II); and/or
a crosslinked reaction product derived from the copolymer,

in formula (I), R 1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; R 2 represents an alkyl group having 1 to 20 carbon atoms having at least one fluorine atom as a substituent, or a group including —Si(R a3 )(R a4 )O—; L represents a divalent linking group constituted of at least one selected from the group consisting of —O—, —(C═O)O—, —O(C═O)—, a divalent aliphatic chain group, and a divalent aliphatic cyclic group; and R a3 and R a4 each independently represent an alkyl group having 1 to 12 carbon atoms which may have a substituent,

in formula (II), R 10 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; R 11 and R 12 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group; R 11 and R 12 may be linked to each other; and X 1 represents a divalent linking group,
wherein R 2 of the repeating unit represented by formula (I) represents an alkyl group having 1 to 20 carbon atoms having at least one fluorine atom as a substituent, and
wherein the repeating unit represented by formula (I) is a repeating unit represented by formula (III),

in formula (III), R 1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; ma and na each independently represent an integer of 1 to 20; and X represents a hydrogen atom or a fluorine atom.

2. The polarizing plate according to claim 1 , wherein X 1 of the repeating unit represented by formula (II) includes at least one linking group selected from —(C═O)O—, —(C═O)—, —(C═O)NH—, —O—, —CO—, —NH—, —O(C═O)—NH—, —O(C═O)—O—, and —CH 2 — and has 7 or more carbon atoms.

3. The polarizing plate according to claim 1 ,
wherein the repeating unit represented by formula (II) is a repeating unit represented by formula (V),

in formula (V), R 10 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; R 11 and R 12 each independently represent a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group; R 11 and R 12 may be linked to each other; X 11 represents a divalent linking group constituted of at least one selected from the group consisting of —(C═O)O—, —O(C═O)—, —(C═O)NH—, —O—, —CO—, and —CH 2 —; and X 12 represents a divalent linking group including at least one linking group selected from —(C═O)O—, —O(C═O)—, —(C═O)NH—, —O—, —CO—, —NH—, —O(C═O)—NH—, —O(C═O)—O—, and —CH 2 —, and at least one substituted or unsubstituted aromatic ring; provided that a total carbon number of X 11 and X 12 is 7 or more.

4. The polarizing plate according to claim 1 ,
wherein R 11 and R 12 of the repeating unit represented by formula (II) represent a hydrogen atom.

5. The polarizing plate according to claim 1 ,
wherein a content of the copolymer is 0.0001% to 40% by mass with respect to a total mass of the functional film.

6. The polarizing plate according to claim 1 ,
wherein the copolymer further has a thermally crosslinking group.

7. The polarizing plate according to claim 1 ,
wherein an equilibrium moisture absorptivity of the functional film under conditions of a temperature of 25° C. and a relative humidity of 80% is 2.0% by mass or less.

8. The polarizing plate according to claim 1 , wherein the functional film further comprises:
a cured product derived from a compound having two or more reactive groups in a molecule.

9. The polarizing plate according to claim 8 ,
wherein the reactive group is a group having an ethylenically unsaturated double bond.

10. The polarizing plate according to claim 8 ,
wherein the compound having two or more reactive groups in the molecule further has a cyclic aliphatic hydrocarbon group.

11. The polarizing plate according to claim 10 ,
wherein the cyclic aliphatic hydrocarbon group is a group represented by formula (A),

in formula (A), L 10 and L 11 each independently represent a single bond or a divalent or higher valent linking group; and n represents an integer of 1 to 3.

12. The polarizing plate according to claim 1 , wherein the functional film further comprises:
a styrene-based resin.

13. The polarizing plate according to claim 12 ,
wherein the styrene-based resin has a thermally crosslinking group.

14. The polarizing plate according to claim 1 ,
wherein the adhesive layer includes a resin having a hydroxyl group.

15. A display device comprising:
the polarizing plate according to claim 1 .

Assignees

• Fujifilm Corp

Inventors

• Otani Taketo
• Wakizaka Daiki
• Fukagawa Reiko
• Tamura Akio

Classifications

• C08F230/065

  the monomer being a polymerisable borane, e.g. dimethyl(vinyl)borane · CPC title

• C09D125/14

  with unsaturated esters · CPC title

• C08L2203/20

  use in electrical or conductive gadgets · CPC title

• C08L2203/16

  used for films · CPC title

• C08F212/08

  Styrene · CPC title