Patent ID: 8912434

Claim:
A polymer, comprising: a repeating unit A represented by the following Chemical Formula 1; and a repeating unit B represented by the following Chemical Formula 2: wherein, in Chemical Formula 1, X 1 is the same or different in each repeating unit, and is independently a group including at least two ester residual groups and a substituted or unsubstituted divalent aliphatic organic group linking the at least two ester residual groups, and X 2 is the same or different in each repeating unit, and is independently one selected from hydrogen, a halogen, a substituted or unsubstituted C1 to C20 aliphatic organic group, a hydroxyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 ester group, a thiol group, and —SR 100 , wherein R 100 is one selected from a substituted or unsubstituted C1 to C20 aliphatic organic group, a substituted or unsubstituted C2 to C30 aromatic organic group, and a substituted or unsubstituted C2 to C30 heterocycloalkyl group, wherein, in Chemical Formula 2, X 3 and X 4 are the same or different, and are each independently one selected from hydrogen, a halogen, a substituted or unsubstituted C1 to C20 aliphatic organic group, a hydroxyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C1 to C20 ester group, a thiol group, and —SR 101 , wherein R 101 is a substituted or unsubstituted C1 to C20 aliphatic organic group, a substituted or unsubstituted C2 to C30 aromatic organic group, and a substituted or unsubstituted C2 to C30 heterocycloalkyl group wherein the group including the at least two ester residual groups and the substituted or unsubstituted divalent aliphatic organic group linking the at least two ester residual groups is a functional group represented by the following Chemical Formula 3 or 4: wherein, in Chemical Formulas 3 and 4, X 5 to X 7 are the same or different, and are each independently a substituted or unsubstituted divalent C1 to C20 aliphatic organic group, and R 1 and R 2 are the same or different, and are each independently one selected from hydrogen, and a substituted or unsubstituted C1 to C20 aliphatic organic group.