LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT FILM, AND LIQUID CRYSTAL DISPLAY ELEMENT
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United States of America Patent
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Nov 19, 2015
app pub date -
May 14, 2015
filing date -
May 15, 2014
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Abstract
A liquid crystal alignment agent having both good ultraviolet reliability and low ion density, a liquid crystal alignment film formed by the liquid crystal alignment agent, and a liquid crystal display element having the liquid crystal alignment film are provided. The liquid crystal alignment agent includes a polymer composition (A) and a solvent (B). The polymer composition (A) is obtained by reacting a mixture. The mixture includes a carboxylic anhydride component (a) and a diamine component (b). The carboxylic anhydride component (a) includes a tetracarboxylic dianhydride compound (a-1) and a tricarboxylic anhydride compound (a-2). The diamine component (b) includes a diamine compound (b-1) represented by formula (I).
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