Thermosetting composition with photo-alignment property, alignment layer, substrate with alignment layer, retardation plate, and device

Patent metadata

Field	Value
Publication number	US-10017697-B2
Application number	US-201515118049-A
Country	US
Kind code	B2
Filing date	Feb 4, 2015
Priority date	Feb 13, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

An embodiment of the present invention provides a thermosetting composition with a photo-alignment property, including a copolymer containing a photo-alignment constitutional unit represented by the following formula (1) and a thermal cross-linking constitutional unit. In the formula (1), X represents a photo-alignment group causing a photo-isomerization reaction or a photo-dimerization reaction, L 1 represents a single bond, —O—, —S—, —COO—, —COS—, —CO—, —OCO—, —OCO(CH 2 ) n COO—, —OCOCH 2 CH 2 OCH 2 CH 2 COO—, —OCOC 6 H 4 O—, —OCOC 6 H 10 O—, —COO(CH 2 ) n O—, —COOC 6 H 4 O—, —COOC 6 H 10 O—, —O(CH 2 ) n O—, —OC 6 H 4 O—, —OC 6 H 10 O—, or —(CH 2 ) n O—, n represents 1 to 4, R 1 represents a hydrogen atom or a monovalent organic group, and k represents 1 to 5.

First claim

The invention claimed is:

1. A thermosetting composition with a photo-alignment property, comprising a copolymer containing a photo-alignment constitutional unit represented by the following formula (1) and a thermal cross-linking constitutional unit:

in the formula (1), X represents a photo-alignment group causing a photo-isomerization reaction or a photo-dimerization reaction, L 1 represents a single bond, —O—, —S—, —COO—, —COS—, —CO—, —OCO—, —OCO(CH 2 ) n COO—, —OCOCH 2 CH 2 OCH 2 CH 2 COO—, —OCOC 6 H 4 O—, —OCOC 6 H 10 O—, —COO(CH 2 ) n O—, —COOC 6 H 4 O—, —COOC 6 H 10 O—, —OC 6 H 4 O—, —OC 6 H 10 O—, or —(CH 2 ) n O—, n represents 1 to 4, R 1 represents a hydrogen atom or a monovalent organic group, and k represents 1 to 5.

2. The thermosetting composition with a photo-alignment property according to claim 1 , further comprising a cross-linking agent for bonding to a thermal cross-linking group of the thermal cross-linking constitutional unit.

3. The thermosetting composition with a photo-alignment property according to claim 2 , wherein the photo-alignment group is a cinnamoyl group, a chalcone group, a coumarin group, an anthracene group, a quinoline group, an azobenzene group, or a stilbene group.

4. The thermosetting composition with a photo-alignment property according to claim 1 , wherein the thermal cross-linking constitutional unit comprises a self-cross-linkable cross-linking group.

5. The thermosetting composition with a photo-alignment property according to claim 1 , wherein the photo-alignment group is a cinnamoyl group.

6. The thermosetting composition with a photo-alignment property according to claim 1 , wherein the thermal cross-linking group of the thermal cross-linking constitutional unit is a hydroxy group.

7. An alignment layer comprising a copolymer including a photo-alignment constitutional unit represented by the following formula (1) and a cross-linking structure, and the alignment layer comprising a photo-dimerization structure or a photo-isomerization structure of a photo-alignment group in the photo-alignment constitutional unit:

in the formula (1), X represents a photo-alignment group causing a photo-isomerization reaction or a photo-dimerization reaction, L 1 represents a single bond, —O—, —S—, —COO—, —COS—, —CO—, —OCO—, —OCO(CH 2 ) n COO—, —OCOCH 2 CH 2 OCH 2 CH 2 COO—, —OCOC 6 H 4 O—, —OCOC 6 H 10 O—, —COO(CH 2 ) n O—, —COOC 6 H 4 O—, —COOC 6 H 10 O—, —OC 6 H 4 O—, —OC 6 H 10 O—, or —(CH 2 ) n O—, n represents 1 to 4, R 1 represents a hydrogen atom or a monovalent organic group, and k represents 1 to 5.

8. The alignment layer according to claim 7 , wherein the cross-linking structure is a cross-linking structure obtained by bonding a thermal cross-linking group of the thermal cross-linking constitutional unit to a cross-linking agent.

9. The alignment layer according to claim 8 , wherein the photo-alignment group is a cinnamoyl group, a chalcone group, a coumarin group, an anthracene group, a quinoline group, an azobenzene group, or a stilbene group.

10. The alignment layer according to claim 7 , wherein the cross-linking structure is a cross-linking structure of a self-cross-linkable cross-linking group in the thermal cross-linking constitutional unit.

11. A substrate with an alignment layer comprising a substrate, and the alignment layer disposed on the substrate and formed from the thermosetting composition with a photo-alignment property according to claim 1 .

12. A substrate with an alignment layer comprising a substrate, and the alignment layer according to claim 7 , disposed on the substrate.

13. A retardation plate comprising a substrate, the alignment layer according to claim 7 , disposed on the substrate, and a retardation layer disposed on the alignment layer.

14. A device comprising the alignment layer according to claim 7 .

Assignees

• Dainippon Printing Co Ltd

Inventors

• Motooka Mami
• Okuyama Ken-Ichi

Classifications

• C08F212/22 Primary

  Oxygen · CPC title

• C08F212/24

  Phenols or alcohols · CPC title

• C08F212/34

  Monomers containing two or more unsaturated aliphatic radicals · CPC title

• C08F212/32

  containing two or more rings · CPC title

• C08F212/26

  Nitrogen · CPC title