Binder resin, negative-type photosensitive resin composition, and display device comprising black bank formed using same

Patent metadata

Field	Value
Publication number	US-11892772-B2
Application number	US-202017640934-A
Country	US
Kind code	B2
Filing date	Nov 4, 2020
Priority date	Nov 8, 2019
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

The present application relates to a binder resin including a compound represented by Formula 1-1 and a compound represented by the following Formula 1-2, a negative-type photosensitive resin composition, and a display device including a black bank formed by using the same.

First claim

The invention claimed is:

1. A binder resin comprising a compound represented by the following Formula 1-1 and a compound represented by the following Formula 1-2:

Wherein, in the Formulae 1-1 and 1-2,
R1 and R2 are the same as or different from each other, and are each independently hydrogen; —CO-L-R; or —CONR′R″,
L is a substituted or unsubstituted alkenylene group; a substituted or unsubstituted cycloalkenylene group; or a substituted or unsubstituted arylene group,
R, R′, and R″ are the same as or different from each other, and are each independently hydrogen; —COOH; or a substituted or unsubstituted alkyl group,
R3, R4, R11, and R12 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted alkyl group,
r3, r4, r11, and r12 are each an integer from 0 to 4,
R3s are the same as or different from each other when r3 is 2 or higher, R4s are the same as or different from each other when r4 is 2 or higher, R11s are the same as or different from each other when r11 is 2 or higher, and R12s are the same as or different from each other when r12 is 2 or higher,
L1 and L2 are the same as or different from each other, and are each independently a substituted or unsubstituted alkylene group,
M1 to M4 are -M1′-M2′-M3′-,
M1′, M2′ and M3′ are the same as or different from each other, and are each independently a direct bond; —SO 2 —; a substituted or unsubstituted alkylene group; or a substituted or unsubstituted arylene group, and
n and m are each independently an integer from 1 to 30.

2. The binder resin of claim 1 , wherein M1′ and M3′ are the same as or different from each other, and are each independently a direct bond; or a substituted or unsubstituted arylene group, and
M2′ is a direct bond; —SO 2 —; or a substituted or unsubstituted arylene group.

3. The binder resin of claim 1 , wherein M1 and M2 in the formula 1-1 are represented by the following Formula 2:

in the Formula 2,

means a moiety linked to the Formula 1-1,
M2′ is as defined in claim 1 ,
R13 and R14 are the same as or different from each other, and are each independently hydrogen; a hydroxyl group; or a substituted or unsubstituted alkyl group, and
r13 and r14 are an integer from 1 to 4, and when r13 is 2 or higher, R13's are the same as or different from each other, and when r14 is 2 or higher, R14's are the same as or different from each other.

4. The binder resin of claim 1 , wherein R1 and R2 in the formula 1-1 are hydrogen.

5. The binder resin of claim 1 , wherein R1 in the formula 1-1 is —CO-L-R; or —CONR′R″, and
L, R, R′, and R″ are as defined in claim 1 .

6. The binder resin of claim 1 , wherein the compound represented by Formula 1-1 and the compound represented by Formula 1-2 each independently have a weight average molecular weight of 3,000 g/mol to 8,000 g/mol.

7. A negative-type photosensitive resin composition comprising: the binder resin of claim 1 ;
a pigment dispersion; a polyfunctional monomer; a photoinitiator; and a solvent.

8. The negative-type photosensitive resin composition of claim 7 , further comprising a surfactant.

9. The negative-type photosensitive resin composition of claim 7 , wherein the pigment dispersion comprises a black organic pigment.

10. The negative-type photosensitive resin composition of claim 7 , wherein based on 100 parts by weight of the negative-type photosensitive resin composition, the negative-type photosensitive resin composition comprises:
10 to 40 parts by weight of the binder resin;
20 to 40 parts by weight of the pigment dispersion;
0.1 to 10 parts by weight of the polyfunctional monomer;
0.1 to 5 parts by weight of the photoinitiator; and
20 to 50 parts by weight of the solvent.

11. The negative-type photosensitive resin composition of claim 7 , wherein a coating film formed from the negative-type photosensitive resin composition has a taper angle of 18° or more and 27° or less when tested with the coating film having a thickness of 1.5 μm.

12. A display device comprising a black bank formed from the negative-type photosensitive resin composition of claim 7 .

Assignees

• Lg Chemical Ltd

Inventors

• An Junhyun
• Park Hyunmin
• Jeon Seongho
• Lim Minyoung
• Yang Baekhwan

Classifications

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• G03F7/027

  Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds (G03F7/075 takes precedence) · CPC title

• G03F7/0382 Primary

  the macromolecular compound being present in a chemically amplified negative photoresist composition · CPC title

• G03F7/037 Primary

  the binders being polyamides or polyimides · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title