Functional film, polarizing plate, and display device

Patent metadata

Field	Value
Publication number	US-11939462-B2
Application number	US-202017064120-A
Country	US
Kind code	B2
Filing date	Oct 6, 2020
Priority date	Jun 27, 2016
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

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 laminate comprising:
a substrate film; and
a functional film comprising:
a copolymer including a repeating unit represented by formula (III), and a repeating unit represented by formula (II); and/or
a crosslinked reaction product derived from the copolymer,

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, and

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;

further comprising:
an adhesive layer directly in contact with the functional film.

2. The laminate 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—, —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 laminate 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 laminate according to claim 3 ,
wherein R 11 and R 12 of the repeating unit represented by formula (V) represent a hydrogen atom.

5. The laminate 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 laminate according to claim 1 ,
wherein the copolymer further has a thermally crosslinking group.

7. The laminate according to claim 1 , wherein the functional film comprises a cured product derived from a compound having two or more reactive groups in a molecule.

8. The laminate according to claim 7 ,
wherein the reactive group is a group having an ethylenically unsaturated double bond.

9. The laminate according to claim 1 ,
wherein the adhesive layer includes a resin having a hydroxyl group.

10. The laminate according to claim 1 ,
wherein the adhesive layer includes a polyvinyl alcohol-based adhesive or an epoxy-based active energy ray curable adhesive.

11. The laminate according to claim 1 , wherein the content of the copolymer is 0.005% to 10% by mass, assuming that the total solid content of the functional film is 100% by mass.

12. The laminate according to claim 1 , wherein the film thickness of the functional film is 0.4 to 10 μm.

Assignees

• Fujifilm Corp

Inventors

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

Classifications

• C08L33/16 Primary

  Homopolymers or copolymers of esters containing halogen atoms · CPC title

• C08F212/08

  Styrene · CPC title

• C08L25/06

  Polystyrene · CPC title

• C08L33/14

  of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen · CPC title

• C09D125/14

  with unsaturated esters · CPC title