LIQUID CRYSTAL ORIENTED FILM, COMPOSITION AND PRODUCTION OF THE SAME, LIQUID CRYSTAL CLAMPING SUBSTRATE AND LIQUID CRYSTAL DISPLAY ELEMENT

摘要

PURPOSE:To provide a composition to form the liq. crystal oriented film without generating a domain and without the pretilt angle being changed because of the ageing after a liq. crystal is sealed. CONSTITUTION:This composition for a liq. crystal oriented film contains a tetracarboxylic dianhydride having a 7-9C bicyclic alicyclic hydrocarboxylic or the derivative group having <=3 covalent atoms, an aliphatic diamine and a polyamic acid obtained by the reaction of a tetracarboxylic dianhydride other than the former dianhydride, if necessary. A liq. crystal oriented film, etc., are formed from the composition.