WEAKLY ANCHORING LIQUID-CRYSTAL ALIGNMENT AGENT, LIQUID-CRYSTAL DISPLAY ELEMENT, AND POLYMER

• Main Author: MIYAKE Kazutoshi
• Format: Patent
• Language: English; French; Japanese
• Published: 30.03.2023
• 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 BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED 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

A weakly anchoring liquid-crystal alignment agent which is for use in forming a liquid-crystal alignment film of a liquid-crystal cell comprising a liquid crystal and the liquid-crystal alignment film and which includes a graft copolymer comprising a backbone polymer and a branch polymer bonded as side chains to the backbone polymer, wherein the branch polymer is compatible with the liquid crystal and the backbone polymer is incompatible with the liquid crystal or becomes incompatible with the liquid crystal upon burning. L'invention concerne un agent d'alignement de cristaux liquides faiblement ancré qui est destiné à être utilisé dans la formation d'un film d'alignement de cristaux liquides d'une cellule à cristaux liquides comprenant un cristal liquide et le film d'alignement de cristaux liquides et qui comprend un copolymère greffé comprenant un polymère de squelette et un polymère de ramification lié en tant que chaînes latérales au polymère de squelette, le polymère de ramification étant compatible avec le cristal liquide et le polymère de squelette étant incompatible avec le cristal liquide ou devenant incompatible avec le cristal liquide lors de la combustion. 液晶と、液晶配向膜とを有する液晶セルの前記液晶配向膜の形成に用いられ、　幹ポリマーと、前記幹ポリマーの側鎖として前記幹ポリマーに結合した枝ポリマーとを有するグラフト共重合体を含有し、　前記枝ポリマーが、前記液晶と相溶し、　前記幹ポリマーが、前記液晶に相溶しない又は焼成により前記液晶に不相溶化する、 弱アンカリング液晶配向剤。