LIQUID CRYSTAL ALIGNING AGENT, LIQUID CRYSTAL ALIGNMENT FILM AND LIQUID CRYSTAL DISPLAY ELEMENT USING SAME

摘要

Provided are: a liquid crystal aligning agent which has high liquid crystal aligning performance and voltage holding ratio and enables the achievement of quick reduction of residual charge and higher contrast; a liquid crystal alignment film; and a liquid crystal display element. A liquid crystal aligning agent which contains: at least one polymer selected from the group consisting of polyamic acids obtained by a polycondensation reaction between a tetracarboxylic acid dianhydride component containing a tetracarboxylic acid dianhydride of formula (A) and a diamine component containing a diamine of formula (B) and imidized polymers of the polyamic acids; and a compound represented by formula (C). (In the formulae, m represents an integer of 1-5; X1 represents an aliphatic hydrocarbon group having 1-20 carbon atoms or an n-valent organic group containing an aromatic hydrocarbon group; n represents an integer of 2-6; and each of R1 and R2 represents a hydrogen atom or an optionally substituted alkyl group having 1-4 carbon atoms, alkenyl group having 2-4 carbon atoms or alkynyl group having 2-4 carbon atoms, and at least one of the R1 and R2 moieties has a hydrocarbon group that is substituted by a hydroxy group.)