Liquid Crystal composition

Patent metadata

Field	Value
Publication number	US-9644148-B2
Application number	US-201514719854-A
Country	US
Kind code	B2
Filing date	May 22, 2015
Priority date	May 26, 2014
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

Provided is a composition that can form a polarizing film with high dichroic ratio, which contains a compound having a function as a dichroic dye and having a local maximum absorption in a wavelength range of 350 to 550 nm. The composition contains a compound represented by the formula (1) and a polymerizable liquid crystal compound:

wherein Y represents a group represented by the formula (Y1) or the formula (Y2)

First claim

What is claimed is:

1. A composition comprising a compound represented by the formula (1) and a polymerizable liquid crystal compound:

wherein Y represents a group represented by the formula (Y1) or the formula (Y2);
R 1 represents an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, or —N(R)(R 0 ); wherein R and R 0 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, or R and R 0 are bonded together to form a ring together with the nitrogen atom to which R and R 0 are bonded; one or more hydrogen atoms constituting the alkyl group having 1 to 20 carbon atoms, the alkoxy group having 1 to 20 carbon atoms, or the alkyl group having 1 to 10 carbon atoms are independently optionally substituted with an atom or a group selected from the group consisting of a halogen atom, a hydroxyl group and an optionally substituted amino group; the alkyl group having 1 to 20 carbon atoms, the alkoxy group having 1 to 20 carbon atoms, and the alkyl group having 1 to 10 carbon atoms each optionally have an ether linkage (—O—) between carbon atoms constituting them;
R 7 and R 8 are substituents other than a hydrogen atom and are each independently an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom, or a cyano group; one or more hydrogen atoms constituting the alkyl group having 1 to 4 carbon atoms or the alkoxy group having 1 to 4 carbon atoms are independently optionally substituted with a halogen atom or a hydroxyl group; p and q are each independently an integer of 0 to 2;
R 2 and R 3 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, or R 2 and R 3 are bonded together to form a ring together with the nitrogen atom to which R 2 and R 3 are bonded; one or more hydrogen atoms constituting the alkyl group having 1 to 10 carbon atoms are independently optionally substituted with an atom or a group selected from the group consisting of a halogen atom, a hydroxyl group and an optionally substituted amino group; and the alkyl group having 1 to 10 carbon atoms optionally have an ether linkage (—O—) between carbon atoms constituting it;

wherein * shows a bonding site to N;
P 1 and P 2 each independently represent a sulfur atom, an oxygen atom or —NR 10 — wherein R 10 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms;
Q 1 and Q 2 each independently represent a nitrogen atom or ═CH—.

2. The composition according to claim 1 , wherein the compound represented by the formula (1) is a compound represented by the formula (1a):

wherein Y and R 1 to R 3 respectively represent as defined in claim 1 .

3. The composition according to claim 1 , wherein the polymerizable liquid crystal compound exhibits a smectic liquid crystal phase.

4. The composition according to claim 1 , wherein the composition further comprises a polymerization initiator.

5. A polarizing film formed from the composition according to claim 1 .

6. The polarizing film according to claim 5 , wherein a local maximum absorption wavelength (λmax1) of the polarizing film according to claim 5 is longer than a local maximum absorption wavelength (λmax2) of the compound represented by the formula (1) contained in the polarizing film.

7. The polarizing film according to claim 6 , wherein a difference between λmax 1 and λmax 2 is 15 nm or longer.

8. The polarizing film according to claim 5 , wherein the polarizing film exhibits a Bragg peak in x-diffraction measurement.

9. A liquid crystal display device comprising the polarizing film according to claim 5 .

10. A liquid crystal cell comprising a substrate, a liquid crystal layer, and the polarizing film according to claim 5 .

11. The liquid crystal cell according to claim 10 , wherein the polarizing film is disposed between the substrate and the liquid crystal layer.

12. The liquid crystal cell according to claim 11 , further comprising a color filter disposed between the substrate and the liquid crystal layer.

13. A circularly polarizing plate comprising the polarizing film according to claim 5 and a ¼ wavelength plate.

14. An organic EL display device comprising the circularly polarizing plate according to claim 13 and an organic EL element.

Assignees

• Sumitomo Chemical Co

Inventors

• Hida Noriyuki
• Okawa Haruki

Classifications

• C07D513/04

  Ortho-condensed systems · CPC title

• C07D495/04

  Ortho-condensed systems · CPC title

• G02B5/3033

  in the form of a thin sheet or foil, e.g. Polaroid · CPC title

• C09K19/2007

  the chain containing -COO- or -OCO- groups · CPC title

• 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