| 摘要 |
PURPOSE: A liquid crystal aligning agent is provided to have excellent preservation stability and heat resistance and to maintain high quality of a liquid crystal display after using the liquid crystal display for long time. CONSTITUTION: A liquid crystal aligning agent comprises a polymer selected from polyamic acids and polyimides which are obtained by dehydrating the polyamic acids. The polyamic acids are obtained by reacting tetracarboxylic dianhydride and diamine. The tetracarboxylic dianhydride includes bicyclo[2.2.1]heptane-2,3,5,6-tetracarboxylic dianhydride; and the ratio of the isomers represented by chemical formula 1, in the bicyclo[2.2.1]heptane-2,3,5,6-tetracarboxylic dianhydride is 70mol% or more.
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