| abstract |
PROBLEM TO BE SOLVED: To provide a liquid crystal pretilt angle imparting agent for a liquid crystal alignment film capable of controlling the tilt angle of a liquid crystal at an arbitrary angle without performing rubbing by irradiating light. The present invention is a liquid crystal pretilt angle imparting agent for a photo-alignment film, which is represented by the general formula (1). [Chemical 1] (In the formula, R 1 represents a carboxyl group, a sulfo group, a nitro group, an amino group, or a hydroxy group. X 1 represents a linking group represented by — (A 1 -B 1 ) m1 —, 2 represents a linking group represented by — (A 2 —B 2 ) n1 —, wherein A 1 and A 2 are each independently a single bond, and B 1 and B 2 are each independently a single bond. coupling a is .m1 and n1 .D 1 and D 2 .R 2 representing each independently a benzene ring or a naphthalene ring which may have a substituent represents an integer of 0 to 4 each independently is Represents an alkyl group having 6 to 18 carbon atoms, and S represents an integer of 1 to 3.) [Selection figure] None |