| abstract |
The present invention provides a liquid crystal alignment agent capable of producing a liquid crystal alignment film which has a high voltage holding ratio, abrasion resistance, and can quickly alleviate accumulated charges, particularly in a transverse electric field driving method, which can suppress a deviation between a rubbing direction and a liquid crystal alignment direction.nIt is a polyimine precursor obtained by reacting a diamine component containing a diamine represented by the formula (1) with a tetracarboxylic acid derivative component, and ring-closing the polyimine precursor. A liquid crystal alignment agent of at least one polymer selected from the group consisting of polyimine.n□ (R1 represents hydrogen, or a monovalent organic group. Q1 represents an alkylene group having 1 to 5 carbon atoms, and Cy is derived from azetidine, pyrroleazine, piperidine ornA divalent group formed by hexamethyleneimine, and the ring moiety may bond a substituent. R2 and R3 are monovalent organic groups, and q and r are each independently an integer of 0-4. However, the total of q and r is 2 or more, and the plural R2 and R3 have the above definition). |