Color material dispersion liquid, composition, film, optical filter and display device

Patent metadata

Field	Value
Publication number	US-11518888-B2
Application number	US-201917053376-A
Country	US
Kind code	B2
Filing date	Apr 26, 2019
Priority date	May 9, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A color material dispersion liquid including a color material, which is a salt-forming compound of an organic dye with a heteropolyoxometalate, a dispersant and a solvent, wherein the organic dye is at least one organic dye selected from the group consisting of a porphyrin dye, a tetraazaporphyrin dye, a phthalocyanine dye and a squarylium dye, and wherein the heteropolyoxometalate is a heteropolyoxometalate which has an oxidation-reduction potential larger than −0.3 V relative to the silver/silver chloride electrode.

First claim

The invention claimed is:

1. A color material dispersion liquid comprising:
a color material, the color material being a salt-forming compound of an organic dye with a heteropolyoxometalate;
a dispersant, and
a solvent,
wherein the heteropolyoxometalate has an oxidation-reduction potential larger than −0.3 V relative to a silver/silver chloride electrode, and
wherein the salt-forming compound is a compound of formula (3):

where X 1 and X 2 each independently represent an aromatic ring group optionally containing a substituent; Y represents a divalent hydrocarbon group that the carbon atom directly bound to X 1 or X 2 does not have a π bond; Z + represents an organic cation group; e represents an integer of from 1 to 4; and when e is 2 or more, a plurality of Ys and a plurality of may be each the same or different;
A c− represents a heteropolyoxometalate anion which is a c-valent anion and which has an oxidation-reduction potential larger than −0.3 V relative to the silver/silver chloride electrode; f and c are each an integer of 2 or more; g is an integer of 1 or more; and the salt-forming compound is a normal salt that f×e=c×g.

2. The color material dispersion liquid according to claim 1 , wherein the heteropolyoxometalate comprises vanadium.

3. The color material dispersion liquid according to claim 1 , wherein the heteropolyoxometalate has an oxidation-reduction potential of 0 V or more relative to the silver/silver chloride electrode.

4. A composition comprising:
a color material, the color material being a salt-forming compound of an organic dye with a heteropolyoxometalate, and
a binder component,
wherein the heteropolyoxometalate has an oxidation-reduction potential larger than −0.3 V relative to a silver/silver chloride electrode, and
wherein the salt-forming compound is a compound of formula (3):

where X 1 and X 2 each independently represent an aromatic ring group optionally containing a substituent; Y represents a divalent hydrocarbon group that the carbon atom directly bound to X 1 or X 2 does not have a π bond; Z + represents an organic cation group; e represents an integer of from 1 to 4; and when e is 2 or more, a plurality of Ys and a plurality of may be each the same or different;
A c− represents a heteropolyoxometalate anion which is a c-valent anion and which has an oxidation-reduction potential larger than −0.3 V relative to the silver/silver chloride electrode; f and c are each an integer of 2 or more; g is an integer of 1 or more; and the salt-forming compound is a normal salt that f×e=c×g.

5. The composition according to claim 4 , wherein the heteropolyoxometalate comprises vanadium.

6. The composition according to claim 4 , further comprising a dispersant.

7. A film comprising the composition defined by claim 4 or a cured product thereof.

8. The composition according to claim 4 , wherein the heteropolyoxometalate has an oxidation-reduction potential of 0 V or more relative to the silver/silver chloride electrode.

9. An optical filter comprising a color material, wherein the color material being a salt-forming compound of an organic dye with a heteropolyoxometalate,
wherein the heteropolyoxometalate has an oxidation-reduction potential larger than −0.3 V relative to a silver/silver chloride electrode, and
wherein the salt-forming compound is a compound of formula (3):

where X 1 and X 2 each independently represent an aromatic ring group optionally containing a substituent; Y represents a divalent hydrocarbon group that the carbon atom directly bound to X 1 or X 2 does not have a π bond; Z + represents an organic cation group; e represents an integer of from 1 to 4; and when e is 2 or more, a plurality of Ys and a plurality of may be each the same or different;
A C− represents a heteropolyoxometalate anion which is a c-valent anion and which has an oxidation-reduction potential larger than −0.3 V relative to the silver/silver chloride electrode; f and c are each an integer of 2 or more; g is an integer of 1 or more; and the salt-forming compound is a normal salt that f×e=c×g.

10. The optical filter according to claim 9 , wherein the heteropolyoxometalate comprises vanadium.

11. A display device comprising the optical filter defined by claim 9 .

12. The optical filter according to claim 9 , wherein the heteropolyoxometalate has an oxidation-reduction potential of 0 V or more relative to the silver/silver chloride electrode.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Okada Masato
• Amano Hiroko
• Murata Tomoki
• Murakami Fumiyasu

Classifications

• G02B5/223 Primary

  containing organic substances, e.g. dyes, inks or pigments · CPC title

• C08K3/24

  Acids; Salts thereof {(C08K3/16 takes precedence)} · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C09B69/001

  Dyes containing an onium group attached to the dye skeleton via a bridge · CPC title

• C09D17/00

  Pigment pastes, e.g. for mixing in paints (artists' paints C09D5/06) · CPC title