LIQUID CRYSTAL ALIGNMENT AGENT, LIQUID CRYSTAL ALIGNMENT MEMBRANE, LIQUID CRYSTAL ELEMENT AND POLYMER

• Main Authors: NAKAJIMA TAKUMI, ISHIBE TORU
• Format: Patent
• Language: English; Japanese
• Published: 09.04.2024
• 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

To provide a liquid crystal alignment agent by which a liquid crystal element exhibiting excellent liquid crystal alignment property and alignment uniformity and excellent in voltage holding characteristics can be obtained.SOLUTION: Liquid crystal alignment agent contains polymer [A] having partial structure (a) expressed by formula (1) as main chain. In the formula, An1 is divalent group having specific condensation ring structure. X1 and X2 are each divalent group of -S-, -NR1-, -C(=O)-, -NR1-C(=O)-, -NR1-C(=O)-NR2-, substituted or unsubstituted alkanediyl group with carbon number 1-18, or divalent group obtained by substituting some of methylene groups of substituted or unsubstituted alkanediyl group with carbon number 2-18 with -O-, -S-, -NR1-, -C(=O)-, -NR1-C(=O)-, or -NR1-C(=O)-NR2-. Ar1 and Ar2 are each divalent aromatic ring group.SELECTED DRAWING: None 【課題】優れた液晶配向性及び配向均一性を示すとともに、電圧保持特性に優れた液晶素子を得ることができる液晶配向剤を提供すること。【解決手段】式（１）で表される部分構造（ａ）を主鎖に有する重合体［Ａ］を液晶配向剤に含有させる。式中、Ａｎ１は、特定の縮合環構造を有する２価の基である。Ｘ１及びＸ２は－Ｓ－、－ＮＲ１－、－Ｃ（＝Ｏ）－、－ＮＲ１－Ｃ（＝Ｏ）－、－ＮＲ１－Ｃ（＝Ｏ）－ＮＲ２－、炭素数１～１８の置換若しくは無置換のアルカンジイル基、又は炭素数２～１８の置換若しくは無置換のアルカンジイル基における一部のメチレン基が－Ｏ－、－Ｓ－、－ＮＲ１－、－Ｃ（＝Ｏ）－、－ＮＲ１－Ｃ（＝Ｏ）－若しくは－ＮＲ１－Ｃ（＝Ｏ）－ＮＲ２－に置き換えられた２価の基である。Ａｒ１及びＡｒ２は２価の芳香環基である。TIFF2024049129000036.tif7170【選択図】なし