Curable composition including quantum dot, resin layer using the same and display device

Patent metadata

Field	Value
Publication number	US-10876046-B2
Application number	US-201816209782-A
Country	US
Kind code	B2
Filing date	Dec 4, 2018
Priority date	Jul 2, 2018
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A curable composition includes: (A) a quantum dot; (B) a binder resin including a structural unit represented by Chemical Formula 1-1, a structural unit represented by Chemical Formula 1-2, a structural unit represented by Chemical Formula 1-3, and a structural unit represented by Chemical Formula 2; and (C) a solvent. A resin layer is manufactured using the curable composition, and a display device includes the resin layer.

First claim

What is claimed is:

1. A curable composition, comprising:
(A) a quantum dot;
(B) a binder resin comprising a structural unit represented by Chemical Formula 1-1, a structural unit represented by Chemical Formula 1-2, a structural unit represented by Chemical Formula 1-3, and a structural unit represented by Chemical Formula 2; and
(C) a solvent:

wherein:
in Chemical Formula 1-1 and Chemical Formula 1-2, R 1 is a substituted or unsubstituted acrylate group,
in Chemical Formula 1-1 and Chemical Formula 1-3, R 2 is a substituted or unsubstituted C6 to C20 thioaryl group,
in Chemical Formula 2, R 3 and R 4 are independently a substituted or unsubstituted acrylate group or a substituted or unsubstituted C6 to C20 thioaryl group,
in Chemical Formula 1-1, Chemical Formula 1-2, and Chemical Formula 1-3, X 1 is a substituted or unsubstituted quadrivalent organic group, and
in Chemical Formula 2, X 2 is a substituted or unsubstituted divalent organic group.

2. The curable composition of claim 1 , wherein at least one of the acrylate groups R 1 , R 3 , or R 4 is represented by Chemical Formula 3:

wherein, in Chemical Formula 3,
R 5 to R 7 are independently a hydrogen atom or a substituted or unsubstituted C1 to C20 alkyl group.

3. The curable composition of claim 1 , wherein the binder resin satisfies Equation 1:
0.1≤ a/a+b≤ 0.5  Equation 1

wherein, in Equation 1,
a denotes the number of acrylate groups in the binder resin, and
b denotes the number of thioaryl groups in the binder resin.

4. The curable composition of claim 1 , wherein the curable composition further comprises another binder resin comprising a structural unit represented by Chemical Formula 1-3 and structural units represented by Chemical Formula 2 at both terminal ends:

wherein:
in Chemical Formula 1-3 of the other binder resin, R 2 is a substituted or unsubstituted C6 to C20 thioaryl group, and X 1 is a substituted or unsubstituted quadrivalent organic group, and
in Chemical Formula 2 of the other binder resin, R 3 and R 4 are independently a substituted or unsubstituted C6 to C20 thioaryl group, and X 2 is a substituted or unsubstituted divalent organic group.

5. The curable composition of claim 1 , wherein X 1 is represented by one of Chemical Formula X-1 to Chemical Formula X-3:

wherein, in Chemical Formula X-1,
L 1 is a single bond, an oxygen atom, a sulfur atom, *—C(═O)—*, or *—CR a1 R a2 —*, and
wherein R a1 and R a2 are independently a halogen-substituted or unsubstituted C1 to C10 alkyl group.

6. The curable composition of claim 1 , wherein X 2 is represented by one of Chemical Formula X-4 to Chemical Formula X-10:

wherein, in Chemical Formula X-4, R b and R c are independently a hydrogen atom, a substituted or unsubstituted C1 to C20 alkyl group, an ester group or ether group,

wherein, in Chemical Formula X-8, R d is O, S, NH, a substituted or unsubstituted C1 to C20 alkylene group, a C1 to C20 alkylamine group, or a C2 to C20 alkenylamine group,

7. The curable composition of claim 1 , wherein the binder resin has a weight average molecular weight of 2,000 g/mol to 12,000 g/mol.

8. The curable composition of claim 1 , wherein the quantum dot absorbs light at a wavelength of 360 nm to 780 nm and emits fluorescence at a wavelength of 500 nm to 700 nm.

9. The curable composition of claim 1 , wherein the quantum dot comprises a green quantum dot and a red quantum dot.

10. The curable composition of claim 1 , wherein the solvent comprises propylene glycol monomethylether acetate, dipropylene glycol methylether acetate, cyclohexyl acetate, ethanol, ethylene glycoldimethylether, ethylene diglycolmethylethylether, diethylene glycoldimethylether, dimethyl acetamide, 2-butoxyethanol, N-methylpyrrolidine, N-ethylpyrrolidine, propylene carbonate, γ-butyrolactone, or a combination thereof.

11. The curable composition of claim 1 , wherein the curable composition further comprises a reactive unsaturated compound.

12. The curable composition of claim 1 , wherein the curable composition further comprises a diffusion agent.

13. The curable composition of claim 12 , wherein the diffusion agent is included in an amount of 0.1 wt % to 20 wt % based on the total amount of the curable composition.

14. The curable composition of claim 12 , wherein the diffusion agent comprises barium sulfate, calcium carbonate, titanium dioxide, zirconia, or a combination thereof.

15. The curable composition of claim 1 , wherein the curable composition further comprises a thiol-based additive.

16. The curable composition of claim 15 , wherein the thiol-based additive comprises at least two functional groups represented by Chemical Formula 4 at a terminal end:

wherein, in Chemical Formula 4,
L 7 and L 8 are independently a single bond, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C3 to C20 cycloalkylene group, a substituted or unsubstituted C6 to C20 arylene group, or a substituted or unsubstituted C2 to C20 heteroarylene group.

17. The curable composition of claim 1 , wherein the curable composition comprises 1 wt % to 40 wt % of the quantum dot, 1 wt % to 40 wt % of the binder resin, and a balance amount of the solvent based on the total amount of the curable composition.

18. The curable composition of claim 1 , wherein the curable composition further comprises malonic acid; 3-amino-1,2-propanediol; a silane-based coupling agent; a leveling agent; a fluorine-based surfactant; or a combination thereof.

19. A resin layer manufactured using the curable composition of claim 1 .

20. A display device comprising the resin layer of claim 19 .

21. The display device of claim 20 , wherein:
the display device further comprises a color filter and a liquid crystal layer,
the color filter is disposed at one side of the liquid crystal layer, and
the resin layer is disposed at the other side of the liquid crystal layer.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Youn Jinsuop
• Park Minjee
• Ryu Youn Je
• LEE Bumjin
• Jeong Jiyoung
• Choi Jong Kyu

Classifications

• G02F1/133614

  using photoluminescence, e.g. phosphors illuminated by UV or blue light · CPC title

• C08G63/66

  Polyesters containing oxygen in the form of ether groups (C08G63/42, C08G63/58 take precedence) · CPC title

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• C09K2323/03

  Viewing layer characterised by chemical composition · CPC title

• G02F1/133519

  Overcoatings · CPC title