| 摘要 |
<p>An aligning agent for a liquid crystal to be used in the formation of a liquid-crystal alignment film prepared by applying the agent on a substrate having a transparent electrode, followed by firing and surface rubbing, characterized by comprising a precursor of a polyimide comprising repeating units represented by general formula [I], and a solvent-soluble polyimide resin comprising repeating units represented by general formula [II], at least 1 % by mole of R4 in the polyimide represented by general formula [II] being constituted by a divalent organic group constituting a diamine having a long-chain alkyl or fluorine-containing alkyl group with 6 or more carbon atoms, 1 to 80 % by weight of the whole polymer being accounted for by the polyimide represented by general formula [II], wherein R1 and R3 represent each a tetravalent group constituting a tetracarboxylic acid and a derivative thereof; R2 and R4 represent each a divalent organic group constituting a diamine; and m and k are each a positive integer.</p> |
