Polymer, composition, optical film, and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10487165-B2
Application number	US-201715405038-A
Country	US
Kind code	B2
Filing date	Jan 12, 2017
Priority date	Jul 18, 2014
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A polymer having a partial structure formed by performing radical polymerization with respect to a compound having a mesogenic group derived from at least one type of liquid crystal compound selected from a rod-like liquid crystal compound and a disk-like liquid crystal compound, and two or more polymerizable groups, in which the polymer is a branched polymer, and a composition containing the polymer, an optical film, and a liquid crystal display device.

First claim

What is claimed is:

1. A branched polymer, comprising:
(i) a mesogenic group-containing monomeric first component selected from the group consisting of a compound represented by General Formula (X) and a compound represented by General Formula (I),
Q x1 -L x1 -Cy x1 -L x2 Cy x2 -L x3 nx Cy x3 -L x4 -Q x2    General Formula (X)

in the formula, Q X1 and Q X2 each independently represent a polymerizable group, L X1 and L X4 each independently represent a divalent linking group, L X2 and L X3 each independently represent a single bond or a divalent linking group, Cy X1 , Cy X2 , and Cy X3 represent a divalent cyclic group, and nx represents an integer of 0 to 3,

in General Formula (I), Y 11 , Y 12 and Y 13 each independently represent a methine which may be substituted or a nitrogen atom, L 1 , L 2 , and L 3 each independently represent a single bond or a divalent linking group, H 1 , H 2 , and H 3 each independently represent General Formula (I-A) described below or General Formula (I-B) described below, and R 1 , R 2 , and R 3 each independently represent General Formula (I-R) described below,

in General Formula (I-A), YA 1 and YA 2 each independently represent methine which may have a substituent or a nitrogen atom, XA represents an oxygen atom, a sulfur atom, methylene, or imino, * represents a bonding position with respect to an L 1 side to an L 3 side in General Formula (I) described above, and ** represents a bonding position with respect to an R 1 side to a R 3 side in General Formula (I) described above,

in General Formula (I-B), YB 1 and YB 2 each independently represent methine which may have a substituent or a nitrogen atom, XB represents an oxygen atom, a sulfur atom, methylene, or imino, * represents a bonding position with respect to an L 1 side to an L 3 side in General Formula (I) described above, and ** represents a bonding position with respect to an R 1 side to a R 3 side in General Formula (I) described above, and
* L r1 -Q 2 n1 L r2 -L r3 -Q 1    General Formula (I-R)

in General Formula (I-R), * represents a bonding position with respect to an H 1 side to an H 3 side in General Formula (I), L r1 represents a single bond or a divalent linking group, Q 2 represents a divalent group having at least one type of cyclic structure, n1 represents an integer of 0 to 4, L r2 and L r3 each independently represent a divalent linking group, Q 1 represents a polymerizable group or a hydrogen atom, and here, at least two of a plurality of Q 1 's represent a polymerizable group; and
(ii) a fluorine-containing monomeric second component represented by General Formula (a) described below,

in General Formula (a), R a1 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and R a2 represents an alkyl group having 1 to 20 carbon atoms or an alkenyl group having 1 to 20 carbon atoms in which at least one carbon atom has a fluorine atom as a substituent.

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

3. A composition, comprising:
the branched polymer according to claim 1 .

4. The composition according to claim 3 , further comprising:
a liquid crystal compound.

5. The composition according to claim 4 ,
wherein the liquid crystal compound is a polymerizable liquid crystal compound.

6. The composition according to claim 5 ,
wherein the polymerizable liquid crystal compound comprises at least one polymerizable liquid crystal compound selected from a polymerizable rod-shaped liquid crystal compound or a polymerizable disk-shaped liquid crystal compound.

7. An optical film, comprising:
a cholesteric liquid crystal layer containing the branched polymer according to claim 1 on a support.

8. The optical film according to claim 7 ,
wherein the optical film has a laminated structure formed by laminating a plurality of the cholesteric liquid crystal layers.

9. The optical film according to claim 8 ,
wherein the plurality of cholesteric liquid crystal layers comprises at least one cholesteric liquid crystal layer containing a rod-shaped liquid crystal compound and at least one cholesteric liquid crystal layer containing a disk-shaped liquid crystal compound.

10. The optical film according to claim 9 ,
wherein the cholesteric liquid crystal layer containing the rod-shaped liquid crystal compound and the cholesteric liquid crystal layer containing the disk-shaped liquid crystal compound are in contact with each other.

11. A liquid crystal display device, comprising at least:
a backlight unit including the optical film according to claim 7 ; and
a liquid crystal cell.

Assignees

• Fujifilm Corp

Inventors

• Tamura Akio
• Takeda Jun
• Matsuda Yuki
• Akutagawa Nobuyuki

Classifications

• C09K19/40

  containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen or sulfur, e.g. silicon, metals · CPC title

• C09K19/3488

  the heterocyclic ring having more than 6 members, e.g. macrocycles, phthalocyanines · CPC title

• C09K19/3477

  the heterocyclic ring being a five-membered aromatic ring containing at least one nitrogen atom · CPC title

• C09K2019/2078

  Ph-COO-Ph-COO-Ph · CPC title

• G02F1/13362

  providing polarized light, e.g. by converting a polarisation component into another one · CPC title