| 摘要 |
The purpose of the present invention is to produce a polyamic acid ester at a high yield and a high purity, and to provide a liquid crystal aligning agent having excellent rubbing resistance. A liquid crystal aligning agent comprising a polyamic acid ester, wherein the polyamic acid ester is produced using a diester dicarboxylic acid and a diamine as raw materials and by the polycondensation of the raw materials in the presence of a condensing agent represented by any one formula selected from formulae (C-1) to (C-7) and a base. (In the formulae, X1 represents a chlorine atom or a bromine atom; and X2 represents a carbon atom or a nitrogen atom.) |
