| 主权项 |
1. A liquid crystal alignment agent, comprising:
a polymer containing a repeating structural unit represented by the following formula (I): wherein each of P and Q is a divalent organic group; and an organic solvent for dissolving said polymer, wherein the liquid crystal alignment agent has a viscosity ranging from 8 to 35 cps at 25° C., wherein said polymer is obtained by subjecting a diamine compound to polymerization in the presence of an acidic catalyst, and wherein said diamine compound is at least one selected from the group consisting of compounds represented by the following formulas (I-1) to (I-5) and (1) to (6):wherein
R3 is a monovalent organic group having a ring structure containing a nitrogen atom selected from the group consisting of pyridine, pyrimidine, triazine, piperidine and piperazine; X is a divalent organic group; R4a and R4b are independently a divalent organic group having a ring structure containing a nitrogen atom selected from the group consisting of pyridine, pyrimidine, triazine, piperidine and piperazine; R5 and R7 are independently a divalent organic group selected from the group consisting of —O—, —COO—, —OCO—, —NHCO—, —CONH—, and —CO—; R6 is a monovalent organic group having a group selected from the group consisting of a steroid skeleton, a trifluoromethyl group, and a fluoro group, or an alkyl group having 6 to 30 carbon atoms; X1 and X2 are independently a divalent organic group selected from the group consisting of an alicyclic group, an aromatic group, and a heterocyclic group; R8 is selected from the group consisting of an alkyl group having 3 to 18 carbon atoms, an alkoxy group having 3 to 18 carbon atoms, a fluoroalkyl group having 1 to 5 carbon atoms, a fluoroalkoxy group having 1 to 5 carbon atoms, a cyano group, and halogen atoms; R9a, R9b, R9c, and R9d are independently a hydrocarbon group having 1 to 12 carbon atoms; p is an integer ranging from 1 to 3; q is an integer ranging from 1 to 20; and t is an integer ranging from 2 to 12. |
