| abstract |
Provided is a liquid-crystal-aligning agent with which are obtained liquid crystal alignment films that have high voltage retention rates, even with backlight illumination for extended periods, or when impurities have become admixed into the liquid crystals. The liquid-crystal-aligning agent contains a polyamic acid ester having repeating units of formula (1), and an organic solvent. Formula (1) (X is a tetravalent organic group; Y is a divalent organic group; R is a C1-5 alkyl group; and A 1 and A 2 are hydrogen atoms, or optionally substituted C1-10 alkyl groups, alkenyl groups, or alkynyl groups, at least some of the Y groups being divalent organic groups of formula (2).) Formula (2) (D is a C1-20 divalent saturated hydrocarbon group, unsaturated hydrocarbon group, aromatic hydrocarbon group, or heterocycle, D being optionally substituted. m is 1 or 0.) |