| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid crystal aligning agent having a high voltage retention and low image persistence property. SOLUTION: The liquid crystal aligning agent comprises a mixture of the following polyamic acid, its imidized polymer or other imidized polymers, in which the proportion of amic acid coupling units ranges from 5 to 80%. The polyamic acid is obtained by incorporating 1,2,3,4-cyclobutane tetracarboxylic acid dianhydride and 1,4-diaminocyclohexane, bicyclo[2.2.1]heptan-2,6-bis(methylamine), 1,3-bis(aminomethyl)cyclohexane, isophorone or alkyl substituted compounds of these diamines, as at least a part of a tetracarboxylic acid dianhydride and of a diamine compound. COPYRIGHT: (C)2009,JPO&INPIT
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