NOVEL DIAMINE

• Main Authors: KONISHI REIKU, SUGA TAKAHIRO, MIYAMOTO YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 05.12.2023
• 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 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 aligning agent for producing a liquid crystal alignment film for optical alignment which is free from bright spots and provides good afterimage characteristics even when a negative liquid crystal is used, and to provide the liquid crystal alignment film, and a novel diamine that serves as a material for a liquid crystal display element.SOLUTION: A diamine disclosed herein is represented by the following formula. (In the formula, R1 and R2 independently represent a single bond, -O-, -S-, -NR12-, ester bond, amide bond, thioester bond, urea bond, carbonate bond, or a carbamate bond, R12 represents a hydrogen atom or a methyl group, and A represents an alkylene group having 1 or 2 carbon atoms.)SELECTED DRAWING: None 【課題】ネガ型液晶を用いた場合でも、輝点が発生せず、良好な残像特性が得られる光配向法用の液晶配向膜を得るための液晶配向剤、液晶配向膜及び液晶表示素子の原料となる新規なジアミンを提供する。【解決手段】下記式で表されるジアミン。TIFF2023171826000043.tif13122（式中、Ｒ１及びＲ２は、それぞれ独立して、単結合、－Ｏ－、－Ｓ－、－ＮＲ１２－、エステル結合、アミド結合、チオエステル結合、ウレア結合、カーボネート結合、又はカルバメート結合であり、Ｒ１２は、水素原子又はメチル基であり、Ａは炭素数１又は２のアルキレン基である。）【選択図】なし