Cardo-based binder resin, photosensitive resin composition comprising same, black matrix, color filter, and display device

1. A cardo-based binder resin represented by Chemical Formula 1:

wherein, in the Chemical Formula 1,

R1 and R2 are hydrogen or represented by Chemical Formula 2;

at least one of R1 and R2 is represented by the Chemical Formula 2; and

n is an integer of 1 to 50,

wherein, in Chemical Formula 2,

represents a site linked to Chemical Formula 1,

X1 to X6 are a substituted or unsubstituted alkylene group; or a substituted or unsubstituted alkylene oxide group;

Y1 and Y2 are selected from the group consisting of a substituted or unsubstituted alkylene group; a substituted or unsubstituted cycloalkylene group; a substituted or unsubstituted cycloalkenylene group; and a substituted or unsubstituted arylene group;

R3 to R5 are the same as or different from each other, and each independently hydrogen; or a substituted or unsubstituted alkyl group;

A1 to A4 are the same as or different from each other, and each independently selected from the group consisting of hydrogen; deuterium; a halogen group; a nitrile group; a nitro group; a hydroxyl group; an ester group; an imide group; an amide group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted cycloalkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted phosphine oxide group; a substituted or unsubstituted phosphine group; a substituted or unsubstituted sulfonyl group; a substituted or unsubstituted amine group; a substituted or unsubstituted aryl group; and a substituted or unsubstituted heteroaryl group; and

a1 to a4 are an integer of 0 to 4, and when a1 to a4 are 2 or greater, A1 to A4 are the same as or different from each other.

2. The cardo-based binder resin of claim 1 , which has an acid value of 0 mg KOH/g to 50 mg KOH/g.

3. The cardo-based binder resin of claim 1 , wherein X1 to X6 are a substituted or unsubstituted alkylene group having 1 to 3 carbon atoms; or a substituted or unsubstituted alkylene oxide group having 2 to 10 carbon atoms; and

Y1 and Y2 are selected from the group consisting of a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms; a substituted or unsubstituted cycloalkylene group having 3 to 10 carbon atoms; a substituted or unsubstituted cycloalkenylene group having 3 to 10 carbon atoms; and a substituted or unsubstituted arylene group having 6 to 20 carbon atoms.

4. The cardo-based binder resin of claim 1 , wherein R1 and R2 are represented by the Chemical Formula 2.

5. The cardo-based binder resin of claim 1 , which has a weight average molecular weight of 1,000 g/mol to 10,000 g/mol.

6. A photosensitive resin composition comprising the cardo-based binder resin of claim 1 .

7. The photosensitive resin composition of claim 6 , further comprising:

a colorant;

a multifunctional monomer;

a photoinitiator; and

a solvent.

8. The photosensitive resin composition of claim 7 , further comprising at least one selected from the group of an acryl-based binder resin; an adhesion promoter; and a leveling agent.

9. The photosensitive resin composition of claim 8 , comprising

the cardo-based binder resin in 0.5 parts by weight to 10 parts by weight;

the colorant in 1 part by weight to 50 parts by weight;

the acryl-based binder resin in 0 part by weight to 10 parts by weight;

the multifunctional monomer in 1 part by weight to 20 parts by weight;

the photoinitiator in 0.1 parts by weight to 10 parts by weight;

the adhesion promoter in 0.01 parts by weight to 5 parts by weight;

the leveling agent in 0.01 parts by weight to 5 parts by weight; and

the solvent in 20 parts by weight to 95 parts by weight, based on 100 parts by weight of the photosensitive resin composition.

10. A black matrix formed using from the photosensitive resin composition of claim 6 .

11. A color filter comprising the black matrix of claim 10 .

12. A display apparatus comprising the black matrix of claim 10 .