| 简介 |
Provided is a liquid crystal aligning agent which can form a liquid crystal alignment film for optical alignment enabling uniform liquid crystal alignment at an angle slightly tilted from the vertical. The liquid crystal aligning agent is characterised in having at least one type of polymer selected from a group comprising : polyamic acids obtained by subjecting a diamine component containing a diamine represented by formula [1] and a tetracarboxylic acid dianhydride component to a polymerisation reaction; and polyimides obtained by the cyclodehydration of said polyamic acids. (In formula [1], S represents a hydrogen atom, -CN, -O(CH2)mCH3, -(CH2)mCH3 (where m is an integer of 0-4), -NR1R2- (where R1 and R2 independently represent a hydrogen atom or a C1-6 alkyl group), a halogen atom, or a carboxyl group. P represents a single bond, a phenyl group, or a cyclohexyl group. Q represents a single bond, or a -O-, -COO- bonding group. R represents a C4-20 alkyl group.) |
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