Liquid crystal orientation agent, liquid crystal orientation membrane and method for manufacturing same, and liquid crystal display element

The present invention provides a liquid crystal orientation agent containing a compound (B') whose thermogravimetric reduction at 120 DEG C is 30% or less and at 250 DEG C is 90% or more as measured under a temperature increase of 40 DEG C to 20 DEG C/minute, and a polymer component (exclusive...

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Bibliographische Detailangaben
Hauptverfasser:	AKIIKE TOSHIYUKI, KASHISHITA KOUJI, KATAGIRI HIROSHI, NOBE YOUHEI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS CORRECTING FLUIDS 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 DYES FILLING PASTES FREQUENCY-CHANGING INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention provides a liquid crystal orientation agent containing a compound (B') whose thermogravimetric reduction at 120 DEG C is 30% or less and at 250 DEG C is 90% or more as measured under a temperature increase of 40 DEG C to 20 DEG C/minute, and a polymer component (exclusive of a compound corresponding to the compound (B')). Use of such a liquid crystal orientation agent in forming a liquid crystal orientation membrane makes it possible to obtain a liquid crystal display element exhibiting high performance in various characteristics such as reliability, leveling properties, liquid crystal orientation and afterimage characteristics. For the polymer component, at least one kind of polymer (A) selected from the group consisting of polyamic acid, polyamic acid ester and polyimide or the like may be given as an example.