LIQUID CRYSTAL ORIENTATION AGENT, LIQUID CRYSTAL ORIENTATION MEMBRANE AND LIQUID CRYSTAL DISPLAY

摘要

PROBLEM TO BE SOLVED: To provide a liquid crystal orientation agent to provide a liquid crystal display where a voltage retention rate is high, a residual DC is suppressed and long term light dependability is high, and besides, to provide a diamine which is a raw material for a polymer used for the liquid crystal orientation agent.SOLUTION: A diamine shown in a formula (I-2). Or a liquid crystal orientation agent containing polyamic acid provided by reacting a mixture of the diamine and another diamine with tetracarboxylic dianhydride, or a derivative of the polyamic acid.