# US 2017/0283701 A1 · Polymer, composition, optical film, and liquid crystal display device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2017/0283701 A1
- Document ID: US20170283701A1
- Status: Published application
- Kind: A1
- Application number: 15/618,725
- Filed: 2017-06-09
- Published: 2017-10-05
- Earliest claimed: 2014-12-12
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Akio TAMURA; Koji IIJIMA
- Web page: https://patentgrep.com/patent/US20170283701A1

## CPC

- C08F 222/103: {of trialcohols, e.g. trimethylolpropane tri(meth)acrylate}
- C08F 220/24: containing perhaloalkyl radicals
- C08F 222/102: {of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate}
- C09K 19/3477: {the heterocyclic ring being a five-membered aromatic ring containing at least one nitrogen atom}
- C09K 19/54: Additives having no specific mesophase {characterised by their chemical composition}
- C09K 19/544: {as dispersing or encapsulating medium around the liquid crystal}
- G02B 1/04: made of organic materials, e.g. plastics (G02B1/08 takes precedence)
- G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00)
- G02B 5/3016: {involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528)}
- G02F 1/133365: {Cells in which the active layer comprises a liquid crystalline polymer}
- G02F 1/1336: {Illuminating devices}
- C09K 2019/0448: {the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate}
- C09K 2019/528: {Surfactants}
- G02F 1/13363: Birefringent elements, e.g. for optical compensation
- G02F 2202/023: curable
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

A polymer is obtained by polymerizing a monomer having two or more radical polymerizable double bonds and one or more hydroxyl groups. A composition including the polymer, an optical film including a cholesteric liquid crystal layer containing the polymer on a support, and a liquid crystal display device including at least a backlight unit including the optical film and a liquid crystal cell are provided.

## Claims

### Claim 1

A polymer obtained by polymerizing a monomer having two or more radical polymerizable double bonds and one or more hydroxyl groups.

### Claim 2 (depends on 1)

The polymer according to claim 1, wherein the monomer is represented by the following Formula X,
ZX1-LX1-LX2-MLX3-LX4-ZX2)n Formula X
in Formula X, ZX1 and ZX2 each independently represent a group having a radical polymerizable double bond, LX1 and LX4 each independently represent a single bond or an alkylene group having a hydroxyl group, LX2 and LX3 each independently represent a single bond or a divalent linking group including at least one selected from the group consisting of —O—, —(C═O)O—, —O(C═O)—, a divalent chained group, an alkylene group having a hydroxyl group, and a divalent cyclic aliphatic group, M represents a single bond or a divalent to tetravalent linking group, and n represents an integer of 1 to 3.

### Claim 3 (depends on 2)

The polymer according to claim 2, wherein the monomer is represented by the following Formula X1,
in Formula X1, R1, R2, and R3 each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, L11, L12, and L13 each independently represent a single bond or a divalent linking group including at least one selected from the group consisting of —O—, —(C═O)O—, —O(C═O)—, a divalent chained group, an alkylene group having a hydroxyl group, and a divalent cyclic aliphatic group, M1 represents a single bond or a divalent or trivalent linking group, and n1 represents an integer of 0 to 2.

### Claim 4 (depends on 1)

The polymer according to claim 1 having a partial structure formed by polymerizing a compound having a fluorine atom.

### Claim 5 (depends on 4)

The polymer according to claim 4, wherein the compound having a fluorine atom is represented by the following Formula a,
in Formula a, Ra1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and Ra2 represents an alkyl group having 1 to 20 carbon atoms of which at least one carbon atom has a fluorine atom as a substituent.

### Claim 6 (depends on 1)

The polymer according to claim 1, wherein a weight-average molecular weight is 1,000 to 300,000 in terms of polystyrene by gel permeation chromatography.

### Claim 7 (depends on 6)

The polymer according to claim 6, wherein the weight-average molecular weight is 1,000 to 10,000 in terms of polystyrene by gel permeation chromatography.

### Claim 8 (depends on 1)

The polymer according to claim 1 having a highly branched structure.

### Claim 9 (depends on 1)

A composition comprising the polymer according to claim 1.

### Claim 10 (depends on 9)

The composition according to claim 9, further comprising a liquid crystal compound.

### Claim 11 (depends on 10)

The composition according to claim 10, wherein the liquid crystal compound is a polymerizable liquid crystal compound.

### Claim 12 (depends on 11)

The composition according to claim 11, 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.

### Claim 13 (depends on 1)

An optical film comprising a cholesteric liquid crystal layer containing the polymer according claim 1 on a support.

### Claim 14 (depends on 13)

The optical film according to claim 13 having a structure formed by laminating a plurality of the cholesteric liquid crystal layers.

### Claim 15 (depends on 14)

The optical film according to claim 14, wherein the plurality of the cholesteric liquid crystal layers comprise 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.

### Claim 16 (depends on 15)

The optical film according to claim 15, 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.

### Claim 17 (depends on 13)

A liquid crystal display device comprising at least:
a backlight unit including the optical film according to claim 13; and
a liquid crystal cell.