Composition for preparing optical functional layer, optical film, and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10597478-B2
Application number	US-201816000288-A
Country	US
Kind code	B2
Filing date	Jun 5, 2018
Priority date	Dec 11, 2015
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A composition for preparing an optical functional layer capable of forming an optical film having an excellent surface condition and excellent lamination properties with another layer, includes a liquid crystal compound and a copolymer, and the copolymer includes a constitutional unit corresponding to a fluoroaliphatic group-containing monomer represented by Formula I, and a constitutional unit corresponding to a monomer represented by Formula II. In Formulae I and II, R 1 , R 10 , and R 3 each independently represent 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 in which at least one carbon atom has a fluorine atom as a substituent, and L represents a divalent linking group constituted by at least one selected from the group consisting of —O—, —(C═O)O—, —O(C═O)—, a divalent chain group, and a divalent aliphatic cyclic group.

First claim

What is claimed is:

1. An optical film comprising:
a cholesteric liquid crystal layer containing a composition for preparing an optical functional layer on a support,
wherein the composition for preparing an optical functional layer comprises:
a liquid crystal compound; and
a copolymer,
wherein the copolymer includes a constitutional unit corresponding to a fluoroaliphatic group-containing monomer represented by Formula I, and a constitutional unit corresponding to a monomer represented by Formula II,

wherein in Formulae I and II, R 1 , R 10 , and R 3 each independently represent 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 in which at least one carbon atom has a fluorine atom as a substituent, and L represents a divalent linking group constituted by at least one selected from the group consisting of —O—, —(C═O)O—, —O(C═O)—, a divalent chain group, and a divalent aliphatic cyclic group,
wherein the cholesteric liquid crystal layer is formed by laminating a plurality of layers, and
wherein the plurality of cholesteric liquid crystal layers has a cholesteric liquid crystal layer including a rod-like liquid crystal compound and a cholesteric liquid crystal layer including a disk-like liquid crystal compound.

2. The optical film according to claim 1 ,
wherein the fluoroaliphatic group-containing monomer represented by Formula I is a monomer 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 10, and X represents a hydrogen atom or a fluorine atom.

3. The optical film according to claim 2 ,
wherein in Formula III, ma is an integer of 1 or 2, and na is an integer of 1 to 6.

4. The optical film according to claim 1 ,
wherein in Formula II, R 3 is a methyl group, an ethyl group, a propyl group, a t-butyl group, or a n-butyl group.

5. The optical film according to claim 1 ,
wherein the liquid crystal compound is a polymerizable liquid crystal compound.

6. The optical film according to claim 5 ,
wherein the polymerizable liquid crystal compound is at least one of a polymerizable rod-like liquid crystal compound or a polymerizable disk-like liquid crystal compound.

7. The optical film according to claim 1 ,
wherein the cholesteric liquid crystal layer including the rod-like liquid crystal compound and the cholesteric liquid crystal layer including the disk-like liquid crystal compound are in contact with each other.

8. A liquid crystal display device comprising at least:
a backlight unit including the optical film according to claim 1 ; and
a liquid crystal cell.

9. The optical film according to claim 1 ,
wherein R 1 represents a hydrogen atom or a methyl group.

10. The liquid crystal display device according to claim 8 ,
wherein R 1 represents a hydrogen atom or a methyl group.

Assignees

• Fujifilm Corp

Inventors

• Tamura Akio
• Akutagawa Nobuyuki

Classifications

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• C08F220/22

  Esters containing halogen · CPC title

• C09D157/10

  containing oxygen atoms · CPC title

• C08F216/1408

  Monomers containing halogen · CPC title

• C09D183/04

  Polysiloxanes · CPC title