Colorant, colored resin composition comprising the same, and color filter

Patent metadata

Field	Value
Publication number	US-10647853-B2
Application number	US-201715720970-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Sep 30, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

The present invention relates to a colorant, a colored resin composition comprising the colorant, and a color filter prepared using the colored resin composition. A novel reddish yellow pigment may be used in combination with a green pigment and a yellow pigment in order to reduce the imbalance of the intramolecular polarization of the green pigment and/or the yellow pigment in the colorant. As a result, a color filter comprising a colored layer in which a light leakage phenomenon, caused by an electric field distortion, is reduced.

First claim

What is claimed is:

1. A colorant comprising:
a first pigment represented by Formula 5 or Formula 6:

wherein M is Zn; or

wherein M is Zn;
a second pigment represented by Formula 2:

wherein R 1 to R 9 are each independently hydrogen, hydroxy, cyano or halogen; and
a third pigment represented by Formula 3:

wherein R 10 to R 18 are each independently hydrogen, hydroxy, cyano or halogen, and any adjacent two of R 15 to R 18 are linked to each other to form a substituted aromatic ring or an unsubstituted aromatic ring.

2. The colorant of claim 1 , wherein the third pigment is represented by Formula 4:

wherein R 20 to R 23 are each independently selected from hydrogen, hydroxy, cyano, halogen, substituted C 1 -C 19 alkyl, unsubstituted C 1 -C 19 alkyl, substituted C 2 -C 10 alkenyl, unsubstituted C 2 -C 10 alkenyl, substituted C 1 -C 10 alkoxy or unsubstituted C 1 -C 10 alkoxy.

3. The colorant of claim 1 , wherein the aromatic ring is a benzene ring or a heteroaromatic ring containing at least one heteroatom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom.

4. The colorant of claim 1 , wherein the third pigment is represented by Formula 1-a:

wherein R 20 to R 23 are each independently selected from hydrogen, hydroxy, cyano, halogen, substituted C 1 -C 19 alkyl, unsubstituted C 1 -C 19 alkyl, substituted C 2 -C 10 alkenyl, unsubstituted C 2 -C 10 alkenyl, substituted C 1 -C 10 alkoxy or unsubstituted C 1 -C 10 alkoxy.

5. The colorant of claim 1 , wherein the third pigment is represented by Formula 1-c:

wherein R 20 to R 23 are each independently selected from hydrogen, hydroxy, cyano, halogen, substituted C 1 -C 19 alkyl, unsubstituted C 1 -C 19 alkyl, substituted C 2 -C 10 alkenyl, unsubstituted C 2 -C 10 alkenyl, substituted C 1 -C 10 alkoxy or unsubstituted C 1 -C 10 alkoxy.

6. A colored resin composition comprising:
(A) a colorant comprising a first pigment represented by Formula 1 Formula 5 or Formula 6:

wherein M is Zn; or

wherein M is Zn;
a second pigment represented by Formula 2:

wherein R 1 to R 9 are each independently hydrogen, hydroxy, cyano or halogen; and
a third pigment represented by Formula 3:

wherein R 10 to R 18 are each independently hydrogen, hydroxy, cyano or halogen, and any adjacent two of R 15 to R 18 are linked to each other to form a substituted aromatic ring or an unsubstituted aromatic ring;
(B) a binder resin; and
(C) a solvent.

7. The colored resin composition of claim 6 , wherein the third pigment is represented by Formula 4:

wherein R 20 to R 23 are each independently selected from hydrogen, hydroxy, cyano, halogen, substituted C 1 -C 19 alkyl, unsubstituted C 1 -C 19 alkyl, substituted C 2 -C 10 alkenyl, unsubstituted C 2 -C 10 alkenyl, substituted C 1 -C 10 alkoxy or unsubstituted C 1 -C 10 alkoxy.

8. The colored resin composition of claim 6 , wherein the first pigment is represented by Formula 6:

wherein the second pigment is represented by Formula 7:

and
wherein the third pigment is represented by Formula 8:

9. The colored resin composition of claim 6 , wherein the first pigment is represented by Formula 5:

and
wherein the third pigment is represented by Formula 8:

10. The colored resin composition of claim 6 , wherein the first pigment is represented by Formula 6:

and
wherein the third pigment is represented by Formula 8:

11. The colored resin composition of claim 6 , wherein the first pigment is represented by Formula 5:

wherein the second pigment is represented by Formula 7:

and
wherein the third pigment is represented by Formula 8:

12. The colored resin composition of claim 6 , wherein the colorant is in an amount of 5 to 50 wt %.

13. The colored resin composition of claim 6 , further comprising a first dispersing agent having an acid value of 1 to 350 KOH mg/g as a solid basis, or a second dispersing agent having an amine value of 1 to 200 KOH mg/g.

14. The colored resin composition of claim 6 , further comprising a first dispersing agent having an acid value of 1 to 350 KOH mg/g as a solid basis, and a second dispersing agent having an amine value of 1 to 200 KOH mg/g.

15. The colored resin composition of claim 6 , wherein the binder resin is an acrylic binder resin or a cardo-based binder resin.

16. The colored resin composition of claim 15 , wherein the acrylic binder resin contains a fluoro group.

17. The colored resin composition of claim 6 , wherein the binder resin has a weight average molecular weight in a range of 1,000 to 200,000.

18. The colored resin composition of claim 6 , wherein the binder resin is in an amount of 30 to 50 wt % on a solids basis.

Assignees

• Lg Display Co Ltd

Inventors

• KWON Jihee
• Ji Seunghoon

Classifications

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• C09B67/009

  polymeric dispersing agent · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C09B25/00

  Quinophthalones · CPC title

• G02B5/223

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