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

摘要

[Problem] To provide a liquid crystal alignment agent that makes it possible to form a liquid crystal alignment film that gives a liquid crystal display element that has favorable viewing angle characteristics and afterimage characteristics. [Solution] A liquid crystal alignment agent that contains a polymer that is the product of reacting starting materials that include a tetracarboxylic acid dianhydride and a diamine. The starting materials used to synthesize the polymer include at least one compound selected from compounds represented by formulas (1)–(3) and also include compounds represented by formulas (A)–(C) and at least one compound selected from compounds represented by formula (D), provided that, when m in formula (1) is 8, no compound represented by formulas (A)–(C) need be included in the diamine, and the tetracarboxylic acid dianhydride need not be a compound represented by formula (D).