| abstract |
A liquid crystal-aligning agent comprising at least one kind of a polymer selected from the group consisting of a polyamic acid, which is obtained by reacting a diamine component containing a diamine compound represented by formula [1] with a tetracarboxylic dianhydride, and a polyimide obtained by the dewatering cyclization of said polyamic acid. In formula [1], X1 represents -O-, -NH-, -N(CH3)-, -CONH-, -NHCO-, -CH2O-, -COO-, -OCO-, -CON(CH3)- or -N(CH3)CO-; X2 represents a single bond or an aliphatic hydrocarbon group, a non-aromatic cyclic hydrocarbon group or an aromatic hydrocarbon group, each group having 1 to 20 carbon atoms; X3 represents a single bond, -O-, -NH-, -N(CH3)-, -CONH-, -NHCO-, -COO-, -OCO-, -CON(CH3)-, -N(CH3)CO- or -O(CH2)m- (wherein m is an integer of 1 to 5); X4 represents an organic group having 1 to 20 carbon atoms; and n is an integer of 1 to 4. |