Resin, preparation method therefor, resin composition, and molded product

A resin, comprising:

• a unit of the following Chemical Formula 1;
• and
• a unit of the following Chemical Formula 2:
• wherein, in Chemical Formulae 1 and 2,
• Ar1 and Ar2 are the same as or different from each other, and are each independently a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group,
• R1 is hydrogen, deuterium, a halogen group, a cyano group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group,
• R2 and R3 are different from each other, and are each independently hydrogen, deuterium, a halogen group, a cyano group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted silyl group, an aryl group which is unsubstituted or substituted with deuterium, a halogen group, a hydroxyl group, a cyano group, an alkyl group, a cycloalkyl group, an alkoxy group, an alkenyl group, an aryloxy group, an arylthio group, an alkylthio group, an aryl group, or a heteroaryl group, or a substituted or unsubstituted heteroaryl group,
• r1 is 1 or 2, and when r1 is 2, each R1 is the same as or different from each other,
• r2 and r3 are each an integer from 1 to 4, and when r2 is 2 to 4, two or more R2 are the same as or different from each other, and when r3 is 2 to 4, two or more R3 are the same as or different from each other,
• L1 and L2 are the same as or different from each other, and are each independently a substituted or unsubstituted arylene group, or a heteroarylene group,
• X1 to X10, X′9 and X′10 are the same as or different from each other, and are each independently O or S,
• Z1 to Z6 are the same as or different from each other, and are each independently a substituted or unsubstituted alkylene group, a substituted or unsubstituted cycloalkylene group, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group,
• La, La′, La″ and La′″ are the same as or different from each other, and are each independently a direct bond or —C(═O)-L-,
• L is a substituted or unsubstituted arylene group,
• a, b, c, d, p and q are the same as or different from each other, and are each independently an integer from 0 to 6, and when a, b, c, d, p and q are each 2 to 6, each a-group, b-group, c-group, d-group, p-group, and q-group are the same as or different from each other,
• t and t′ are the same as or different from each other, and are each independently an integer from 1 to 6, and when t and t′ are each 2 to 6, each t-group and t′-group are the same as or different from each other,
• m and n are the same as each other, and are 0 or 1,
• when m and n are 0, t, r and s are 1, and La is —C(═O)-L-, and
• when m and n are 1, t is an integer from 1 to 6, r+s=1, 0<r<1, and 0<s<1, and
• m′ and n′ are the same as each other, and are 0 or 1,
• when m′ and n′ are 0, t′, x and y are 1, and La′ is —C(═O)-L-, and
• when m′ and n′ are 1, t′ is an integer from 1 to 6, x+y=1, 0<x<1, and 0<y<1.