Polymer, coating composition comprising same, and organic light emitting diode using same

A polymer comprising:

• a first unit represented by the following Formula 1;
• and
• a second unit represented by the following Formula 2:
• in Formulae 1 and 2,
• X is a curing group,
• L1 to L5 are the same as or different from each other, and are each independently a direct bond;
• —O—;
• a substituted or unsubstituted alkylene group;
• a substituted or unsubstituted arylene group;
• a substituted or unsubstituted divalent amine group;
• or a substituted or unsubstituted heteroarylene group,
• b1 and b2 are the same as or different from each other, and are each independently an integer from 1 to 10,
• when b1 and b2 are each 2 or more, two or more L1s and L5s are each the same as or different from each other,
• Ar1 and Ar2 are the same as or different from each other, and are each independently a substituted or unsubstituted aryl group,
• R1 to R9 are the same as or different from each other, and are each independently hydrogen;
• deuterium;
• a halogen group;
• a hydroxyl group;
• a nitrile group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted aryl group;
• or a substituted or unsubstituted heterocyclic group,
• r4 is an integer from 1 to 5,
• r5 is an integer from 1 to 4,
• r6 is an integer from 1 to 3,
• when r4 to r6 are each 2 or more, two or more R4s to R6s are each the same as or different from each other,
• m1 is a mole fraction and 0<m1<1,
• m2 is a mole fraction and 0<m2<1, and
• m1+m2≤1.