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

Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element

A liquid crystal aligning agent and solvent technology, used in liquid crystal materials, optics, instruments, etc., can solve the problems of poor liquid crystal orientation, aggravated rubbing stripes, and narrow rubbing process window, and achieve uniform and stable liquid crystal orientation, excellent anti-rubbing performance, and increased The effect of anchoring ability

Inactive Publication Date: 2019-04-19
VALIANT CO LTD
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The poor orientation of the liquid crystal is mainly caused by the weak anchoring ability of the alignment film to the liquid crystal molecules after the liquid crystal alignment film is photo-aligned or rubbed; the rubbing stripes are due to the fact that the most popular method of aligning the liquid crystal alignment film in the industry is to use cotton cloth, nylon, polyester, etc. Ester and other fiber woven fabrics are rubbed and oriented in one direction. During the rubbing alignment process, rubbing stripes in the direction of the electrode are likely to occur. The rubbing process window is narrow. Increasing the pressing amount will lead to aggravated rubbing stripes, and reducing the pressing amount will lead to liquid crystal alignment. Therefore, as the requirements for display picture quality and yield rate of production lines are getting higher and higher, the requirements for the friction resistance and orientation performance of liquid crystal alignment films are becoming more and more stringent.

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
  • Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0067] The compound represented by structural formula (I-1) can be synthesized according to the following synthetic route 1:

[0068]

[0069] Synthetic route 1

[0070] (1) Synthesis of compound b-1-1a

[0071] 3,3'-dichloro-4,4'-nitrobiphenyl (31.3g, 100 mmol), 4-(4-heptylcyclohexyl)phenol (54.88g, 200 mmol), potassium carbonate (30.40 g, 220 mmol) and 500 g DMF were stirred and heated to 120 ° C for 6 hours, then the temperature was lowered and the solution was filtered, the filtrate was added to 3 L of water, stirred for 0.5 h, filtered, and the obtained solid was added with 50 g of toluene and 150 g of DMF , stirred and heated to complete dissolution, cooled to crystallize, filtered and dried to obtain a solid (b-1-1a), measured by HPLC-MS [M+1] = 789.25.

[0072] (2) Synthesis of compound b-1-1

[0073] The obtained compound b-1-1a (39.47g, 50 mmol), 5% palladium carbon (2.61g, 70% water, 30% solid content) and 400gDMF were put into a 1L autoclave, and the autoclav...

Synthetic example 2

[0079] The compound represented by structural formula (I-7) can be synthesized according to the following synthetic route 2:

[0080]

[0081] Synthetic route 2

[0082] (1) Synthesis of compound b-1-7a

[0083] Drop into p-2-chloro-4-fluoronitrobenzene (17.50 g, 100 mmol), 3-chloro-4-nitrophenol (18.16 g, 105 mmol), potassium carbonate ( 27.64g, 200 mmol) 500g of toluene, stirred and heated to reflux for 6 hours, then cooled to filter the solution, and the filtrate was de-dried, added 300g of toluene to the obtained solid, stirred to raise the temperature to 50°C, cooled to room temperature, and acidified with hydrochloric acid to pH=1 Filtrate, add 150 g of toluene to the obtained solid, stir to heat up to complete dissolution, cool down to crystallize, filter, and dry to obtain a solid (b-1-7a), measured by HPLC-MS [M+1]=328.87.

[0084] (2) Synthesis of compound (b-1-7b)

[0085] Drop b-1-7a (16.40g, 50 mmoles), 4-(4-heptylcyclohexyl) phenol (30.18g, 110 mmoles), potas...

Synthetic example 8-10

[0090] The compounds represented by the structural formulas (I-8) to (I-10) can be etherified with the corresponding parent compounds according to the synthesis route 2 and b-1-7a to obtain the corresponding nitro compounds, and then carry out nitro compounds through catalytic hydrogenation The reduction obtains corresponding diamino compound, and the compound high-resolution mass spectrometry data field elemental analysis results represented by structural formula (I-8) to (I-10) are shown in the following table:

[0091] The mass spectrometry elemental analysis data of each compound of table 2 synthesis example 8-10

[0092]

[0093] (2) Synthesis example of polymer A

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

No PUM Login to View More

Abstract

The invention discloses a liquid crystal aligning agent, a liquid crystal alignment film and a liquid crystal display element. The aligning agent is formed by polymerizing a double-side-chain diaminemonomer and other tetracarboxylic dianhydride monomers; the diamine monomer contains double side chains, so that the anchoring capacity of the alignment film on liquid crystals is effectively improved, and after rubbing alignment or light alignment, liquid crystal alignment is more uniform and stable; the liquid crystal alignment film is excellent in anti-friction performance, so that the liquid crystal alignment film has a wider friction manufacturing window; the prepared liquid crystal display element has the advantages of being excellent in display performance and free of friction stripes so that the high-quality display element can be manufactured, and the yield is higher.

Description

technical field [0001] The invention relates to a liquid crystal aligning agent, a liquid crystal aligning film and a liquid crystal display element, belonging to the technical field of liquid crystal display. Background technique [0002] Liquid crystal display is realized by controlling the alignment state of liquid crystal molecules. Usually, a liquid crystal alignment film is set in the liquid crystal display element to control the initial alignment state of liquid crystal molecules. As a liquid crystal alignment film, polyimide has become the preferred material for liquid crystal alignment films due to its excellent heat resistance, corrosion resistance, mechanical strength and affinity with liquid crystals. [0003] In recent years, with the increase in the possession and use of liquid crystal products, people have put forward higher requirements for the display quality of liquid crystal products, and some previously unknown bad phenomena have also been recognized and ...

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): C09K19/56G02F1/1337
CPCC09K19/56G02F1/133723
Inventor 王治国解万龙王斌孙德生胡葆华周银波
Owner VALIANT 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