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

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;
• —SO2—;
• 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.