Polyimide-based liquid crystal aligning agent.

摘要

A liquid crystal aligning agent is provided which contains a polyimide comprising repeating units of general formula (VII) and optionally general formula (V): where A<3> represents a tetravalent organic group of constituting a tetracarboxylic acid, A<4> represents a divalent organic group of constituting a diamine, B represents a divalent organic group, R<1> and R<5> may be the same or different and each represents an alkyl group, a substituted alkyl group, a phenyl group or a substituted phenyl group, m represents an integer of 1 or more, and n represents an integer of from 1 to 6; provided that n, m, A<3>, A<4>, B, R<1> and R<2> may optionally be different ones in every repeating unit, and the combination of the repeating units are: a) a unit of formulae (V) and (VII), or b) a unit of formulae (VII) and the polyimide having a weight-average molecular weight of 10,000 or more and having a siloxane group in the side chain thereof.