Patent ID: 8623515

Claim:
A liquid crystal alignment agent comprising a polyamic acid including a repeating unit represented by the following Chemical Formula 1, a polyimide including a repeating unit represented by the following Chemical Formula 2, or a combination thereof: wherein, in Chemical Formulae 1 and 2, X 1 and X 2 are the same or different and are each independently a tetravalent organic group derived from alicyclic acid dianhydride or aromatic acid dianhydride, and Y 1 and Y 2 are the same or different and are each independently a divalent organic group derived from diamine, wherein the diamine includes a diamine represented by the following Chemical Formula 3, wherein, in Chemical Formula 3, A 1 is substituted or unsubstituted C1 to C20 alkylene, A 2 is a single bond, O, SO 2 , or C(R 103 )(R 104 ), wherein R 103 and R 104 are the same or different and are independently hydrogen or substituted or unsubstituted C1 to C6 alkylene, A 3 is —O—, —OCO—, —COO—, —CONH—, or —NHCO—, each R 1 is the same or different and is independently substituted or unsubstituted C1 to C30 alkyl; substituted or unsubstituted C6 to C30 aryl; or substituted or unsubstituted C2 to C30 heteroaryl, R 2 is substituted or unsubstituted Cl to C30 alkylene, Cl to C30 alkylene wherein at least one —CH 2 — group thereof is replaced with —CO—, —CO—O—, —NZ—, —NZ—CO—, —CO—NZ— or —CH═CH—, wherein Z is hydrogen or C1 to C10 alkyl, provided that oxygen atoms are not directly bound to each other, each R 3 is the same or different and is independently substituted or unsubstituted C1 to C30 alkyl; substituted or unsubstituted C6 to C30 aryl; or substituted or unsubstituted C2 to C30 heteroaryl, Q 1 , Q2 and Q3 are the same or different and are independently hydrogen or halogen, n is an integer ranging from 1 to 3, m1 is an integer ranging from 0 to 3, and m2 is an integer ranging from 0 to 4, wherein the term substituted means that each group is substituted with a substituent comprising halogen, hydroxy, nitro, cyano, NH 2 , NH(R 100 ), N(R 101 )(R 102 ), amidino, hydrazine, hydrazone, carboxyl, alkyl, haloalkyl, alkoxy, alicyclic, aryl, alkenyl, alkynyl, heteroaryl, heterocycloalkyl, or a combination thereof, wherein R 100 , R 101 , and R 102 are the same or different and are each independently C1 to C10 alkyl.