| 摘要 |
<p>The present invention provides a liquid crystal aligning agent forming a liquid crystal aligning film which has good printability, show high voltage hold ratio, together with a stable pretilt angle independent from the process conditions used. The above liquid crystal aligning agent comprises (A) a polyamic acid obtained from a reaction of a 1, 2, 3, 4-cyclobutantetracarboxylic dianhydride containing tetracarboxylic dianhydride and a diamine, and (B) a polyimide formed by dehydration and ring closure a polyamic acid obtained from a reaction of a tetracarboxylic acid and a diamine containing a specific mono-substitute phenylenediamine represented by the following formula (d-1): wherein comparing to the total amount of (A) number of polyacic acid structures contained in the polyamic acid and (B) number of imide ring structures contained in the polyimide, the amount ratio of (B) number of imide ring structures contained in the polyimide is 10 to 50%.</p> |
