LIQUID CRYSTAL ALIGNING AGENT

摘要

A treating agent for liquid crystal alignment, which comprises a polyimide precursor containing repeating units of the formula (1) and having a polymerization degree of from 0.05 to 5.0 dl/g as calculated as the reduced viscosity (in N-methylpyrrolidone at a temperature of 30 DEG C at a concentration of 0.5 g/dl), and a solvent-soluble polyimide containing repeating units of the formula (2) and having a polymerization degree of from 0.05 to 5.0 dl/g as calculated as the reduced viscosity (in N-methylpyrrolidone at a temperature of 30 DEG C at a concentration of 0.5 g/dl): wherein each of R<1> and R<3> is a tetravalent organic group constituting a tetracarboxylic acid or its derivative, R<2> is a bivalent organic group constituting a diamine, R<4> is a bivalent organic group constituting a diamine having no fluorine-containing alkyl group or no long chain alkyl group having at least 6 carbon atoms, and each of m and n is a positive integer.