Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gia Min, Polya Mick acid or its derivative, a rubbing agent, a film for liquid crystal display , and a liquid crystal display element

A technology of polyamic acid and derivatives, used in liquid crystal materials, chemical instruments and methods, instruments, etc.

Active Publication Date: 2017-07-04
JNC CO LTD +1
View PDF84 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no detailed research has been conducted on the effects of the above methods on the viewing angle characteristics and afterimage characteristics.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gia Min, Polya Mick acid or its derivative, a rubbing agent, a film for liquid crystal display , and a liquid crystal display element
  • Gia Min, Polya Mick acid or its derivative, a rubbing agent, a film for liquid crystal display , and a liquid crystal display element
  • Gia Min, Polya Mick acid or its derivative, a rubbing agent, a film for liquid crystal display , and a liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0758] Synthesis of diamine represented by formula (1-15).

[0759] Synthesis of Dinitroform

[0760] Put 4-amino-2,2,6,6-tetramethylpiperidine (20.0g, 128.0mmol) and potassium carbonate (44.2g, 320.0mmol) into a 500mL three-necked flask equipped with a thermometer and a reflux tube, add 200mL DMF. The solution was kept below 5°C, and 4-fluoronitrobenzene (39.7 g, 281.6 mmol) was slowly added thereto. The cooling of the reaction solution was stopped, and the mixture was further stirred at room temperature for 24 hours. The reaction solution was poured into 500 mL of pure water, and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, and the desiccant was filtered off, and the solvent was distilled off under reduced pressure to obtain a crude product. The obtained crude product was recrystallized from ethanol (50 mL) to obtain the following compound. Yield was 26.3 g, yield 52%.

[0761]

[0762] Reduction of Nitro

[0763] The c...

Embodiment 2

[0765] The synthesis of the diamine shown in formula (1-29)

[0766] Synthesis of Dinitroform

[0767] Put 4-amino-2,2,6,6-tetramethylpiperidine (20.0g, 128.0mmol) and potassium carbonate (44.2g, 320.0mmol) into a 500mL three-necked flask equipped with a thermometer and a reflux tube, add 200mL DMF. The solution was kept below 5° C., and a solution obtained by dissolving 4-nitrobenzyl bromide (60.8 g, 281.6 mmol) in DMF (50 mL) was slowly added thereto. The cooling of the reaction solution was stopped, and the mixture was further stirred at room temperature for 5 hours. The reaction solution was poured into 500 mL of pure water, and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, and the desiccant was filtered off, and the solvent was distilled off under reduced pressure to obtain a crude product. The obtained crude product was recrystallized from ethanol (50 mL) to obtain the following compound. Yield was 46.2 g, 85% yield.

[0...

Embodiment 3

[0772] The synthesis of the diamine shown in formula (1-1)

[0773] Mesylation

[0774] 2-Nitroethanol (30.0 g, 329.4 mmol) and triethylamine (50.0 g, 494.2 mmol) were charged into a 2000 mL three-necked flask equipped with a thermometer and a reflux tube, and 600 mL of THF was added. The solution was kept below 5°C, and methanesulfonyl chloride (45.3 g, 395.3 mmol) was slowly added thereto. The cooling of the reaction solution was stopped, and the mixture was further stirred at room temperature for 24 hours. The reaction solution was poured into 500 mL of pure water, and extracted with ethyl acetate. The organic layer was dried over sodium sulfate anhydrate, and the desiccant was filtered off, and the solvent was distilled off under reduced pressure to obtain the following compound. The yield was 53.2 g, the yield was 95%.

[0775]

[0776] Synthesis of Dinitroform

[0777] Put 4-amino-2,2,6,6-tetramethylpiperidine (13.5g, 86.5mmol) and potassium carbonate (27.5g, 1...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Ion densityaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a Gia Min, Polya Mick acid or its derivative, a rubbing agent, a film for liquid crystal display , and a liquid crystal display element. The present invention relates to a polyamide acid or ramification thereof obtained through diamine reaction of at least one in the Gia Min in the tetracarboxylic acid dianhydride and an including format (1).the view angle features is good, and the display quality cannot be reduced for exposing under the strong light for a long time. R is hydrogen, and -OH, the carbon number is 1-6 alkyl group or the alkoxy number is 1-6, the X1 and the X2 independently have alkylene of the carbon number is 1-8 and / or 2 organic group of the phenylene.

Description

technical field [0001] This invention relates to the polyamic acid which used the diamine represented by formula (1) as a raw material, its derivative(s), the liquid crystal aligning agent containing this polyamic acid, and its derivative(s), and a liquid crystal display element. Background technique [0002] Among the liquid crystal display elements widely distributed in the form of products today, display elements using nematic liquid crystals are mainstream. The TN (twisted nematic, Twisted Nematic) mode and the STN (super twisted nematic, Super Twisted Nematic) mode are well known as the display system of a nematic liquid crystal display element. In recent years, in order to improve the narrow viewing angle which is one of the problems of these modes, a TN-type liquid crystal display element using an optical compensation film, and an MVA (multi-domain vertical alignment, multi-domain vertical alignment, Multi-domain Vertical Alignment) mode, IPS (In-Plane Switching) mod...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08G73/10C07D211/58C09K19/54G02F1/1337
CPCC07D211/58C08G73/1085C09K19/542G02F1/133723
Inventor 塚田裕以智藤马大亮瓜生阳一伊泽启介
Owner JNC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com