LIQUID CRYSTAL ALIGNING AGENT AND LIQUID CRYSTAL DISPLAY ELEMENT

• Main Authors: IZUMI KENICHI, UCHIYAMA KATSUHIRO, AKIIKE TOSHIYUKI, KOYAMA TAKAYOSHI
• Format: Patent
• Language: English
• Published: 24.12.2009
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a liquid crystal aligning agent for providing a liquid crystal display element excellent in liquid crystal alignment properties, rubbing resistance and heat resistance. SOLUTION: The liquid crystal aligning agent contains at least one polymer selected from the group consisting of polyamic acids, which are obtained by reacting tetracarboxylic acid dianhydrides with diamines containing specific compounds typified by the compound shown by formula (A-2), and imidized polymers obtained by dehydrating the polyamic acids and subjecting the dehydrated polyamic acids to a ring closure reaction. COPYRIGHT: (C)2010,JPO&INPIT