Liquid crystal aligning agent, liquid crystal aligning membrane and liquid crystal display element

A technology of liquid crystal alignment agent and solvent, which is applied in the direction of liquid crystal materials, coatings, instruments, etc., to achieve the effects of increasing anchoring ability, reducing electrode stripes, and reducing electrostatic breakdown

Active Publication Date: 2019-01-25
烟台三月科技有限责任公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a liquid crystal alignment agent, a liquid crystal alignment film and a liquid crystal display element in view of the increasingly higher requirements of the current market for liquid crystal display elements and liquid crystal display films.

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 aligning membrane and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal aligning membrane and liquid crystal display element
  • Liquid crystal aligning agent, liquid crystal aligning membrane and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The synthesis of the diamine compound represented by structural formula b-1-1 is shown in Synthetic Route 1:

[0048]

[0049] The specific operation process is:

[0050] (1) Synthesis of compound b-1-1a

[0051] Put 1,3-dibromo-5,7-dinitronaphthalene (37.6g, 0.1mol) and 4-(4-heptylcyclohexyl)phenol (57.63g, 0.21mol) into a 1000mL three-neck round bottom flask , anhydrous potassium carbonate powder (41.46g, 0.3mol) and 300g toluene, the temperature of the oil bath was raised to 105°C and stirred for 3 hours, followed by TLC until there was no remaining raw material 1,3-dibromo-5,7-dinitronaphthalene , lower the system to room temperature, stop stirring, transfer the reaction solution to a separatory funnel and wash it with water until neutral, remove the solvent toluene to obtain a yellow solid, add 228g of absolute ethanol and 114gTHF to it and stir for 30min, then suction filter, dry and filter 65.62g of yellow crystals were obtained from the cake, and the produc...

Embodiment 2～5

[0056] The compounds represented by the structural formulas (b-1-2) to (b-1-5) can be etherified and nitro-dihalogenated arene compounds and their respective parent phenolic compounds according to "synthetic route 1" Catalytic hydrogenation reaction. The specific yield, high-resolution mass spectrometry results and elemental analysis results of each product are shown in Table 1 below.

[0057] Yield, mass spectrum, elemental analysis data of each compound in Table 1 embodiment 2~5

[0058]

Embodiment 6

[0060] The synthesis of the compound represented by structural formula b-1-6 is shown in Synthetic Route 2:

[0061]

[0062] The specific operation process is as follows:

[0063] (1) Synthesis of compound b-1-6a

[0064] Add 4-(4-heptylcyclohexyl)benzoic acid (30.25g, 0.10mol), thionyl chloride (35.69g, 0.3mol) and 250g toluene and 3 drops of DMF into a 500mL three-neck round bottom flask, and heat up to reflux React for 5 hours, then distill out the residual thionyl chloride and toluene in the system. After the system is evaporated to dryness, it is cooled to room temperature to obtain a brownish-yellow solid sticky substance. Add 200g of anhydrous toluene to the system and stir to completely dissolve the solid to obtain b - 1-6a in toluene.

[0065] (2) Synthesis of compound b-1-6b

[0066] The compound 2,3-diamino-6,7-dinitronaphthalene (11.17g, 45mmol), triethylamine (12.14g, 120mmol) and 300g of toluene were put into a 1L three-necked flask, and the temperature of...

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 relates to a liquid crystal aligning agent, a liquid crystal aligning membrane and a liquid crystal display element. The liquid crystal aligning agent is prepared from polymer A and a solvent B, wherein the polymer A is one or a mixture of several in polyamide acid, a product obtained from partial imidization of the polyamide acid and polyimide obtained from complete imidization of the polyamide acid; the polyamide acid is prepared by reaction of a mixture containing a tetracarboxylic dianhydride ingredient a and a diamine ingredient b; the diamine ingredient b comprises one or more diamine ingredient b-1, and the diamine ingredient b-1 has a structural formula shown as a formula 1. The formula is shown in the description. The liquid crystal aligning agent disclosed by the invention is prepared by polymerizing dual-side-chain diamine monomer which is bonded to a conjugated polycyclic aromatic hydrocarbon radical with other tetracarboxylic dianhydride monomers. As the diamine monomer contains a dual-side-chain radical, anchoring capacity of the aligning membrane to liquid crystal is effectively improved; thus, aligning performance of the polyimide membrane is stable; furthermore, the liquid crystal display element prepared from the liquid crystal aligning agent disclosed by the invention has higher display quality.

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] The liquid crystal display element is a flat and ultra-thin display device. Its working principle is to apply an external electric field to the liquid crystal, and the polar molecules of the liquid crystal are twisted under the action of the external electric field, changing the internal arrangement state of the liquid crystal molecules and making the incident polarization The direction of light changes, and the use of polarizers can control whether the light passes or not, so as to achieve the purpose of display. In order to meet the developed electrode structure or a variety of different driving methods, liquid crystal display elements can be divided into TN type (twisted nematic type), STN type (super twisted nematic type), VA type (ver...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56C09D179/08C08G73/10G02F1/1337
CPCC08G73/1042C08G73/1078C09D179/08C09K19/56G02F1/133723
Inventor 解万龙胡葆华周银波孙德生周雨生张鑫鑫
Owner 烟台三月科技有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap