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

A technology of liquid crystal alignment agent and solvent, which is applied in liquid crystal materials, instruments, optics, etc., can solve problems affecting industrial availability and complex manufacturing process, and achieve the effect of improving alignment stability and high contrast

Active Publication Date: 2018-09-04
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The manufacturing process is complicated, which affects the industrial availability

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The compound represented by structural formula (1-1) can be synthesized according to the following synthetic route 1:

[0063]

[0064] (1) Synthesis of compound b-1-1a

[0065] Put 2,4-dinitrophenol (18.4g, 100mmol), 4-[4-(4-pentylcyclohexyl)phenyl]-[trans,trans]-ring into a 1000ml three-necked round bottom flask Hexanol (39.4g, 120mmol), triphenylphosphine (31.5g, 120mmol) and 450g of tetrahydrofuran were stirred and the temperature was lowered to about 5℃ to obtain an orange-red solution. Add diisopropyl azodicarboxylate (24.3 g, 120mmol) in tetrahydrofuran (25g) solution, the system is obviously exothermic, control the internal temperature to 0-10 ℃ dropwise; after the dripping, keep overnight; after the incubation, TLC tracking 2,4-dinitrophenol reaction is complete; The system was transferred to a single-necked round-bottom flask, and the solvent was removed on a rotary evaporator to obtain a tan solid; 500g petroleum ether was added to the tan solid, stirred and diss...

Embodiment 2

[0070] The compound represented by the structural formula (1-2) can be synthesized according to the following synthetic route 2:

[0071]

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

[0073] Put 2,4-dinitrophenol (18.4g, 100mmol), 4-[4-(4-pentylcyclohexyl)cyclohexyl]-[trans, trans, trans into a 1000ml three-necked round bottom flask ]-Cyclohexanol (40.1g, 120mmol), triphenylphosphine (31.5g, 120mmol) and 450g of tetrahydrofuran, stir and lower the temperature to about 5°C to obtain an orange-red solution, and add dropwise azodicarboxylate to the system Propyl ester (24.3g, 120mmol) in tetrahydrofuran (25g) solution, the system is obviously exothermic, control the internal temperature 0-10 ℃ dropwise; after the dropwise addition, keep overnight; after the incubation, TLC follow 2,4-dinitrophenol After the reaction was completed, the reaction system was transferred to a single-necked round-bottom flask, and the solvent was removed on a rotary evaporator to obtain a brown solid. Add 5...

Embodiment 3

[0079] Under a nitrogen atmosphere, the diamine compound (26.1 g, 60 mmol) represented by the structural formula (I-1) prepared in Example 1 (26.1 g, 60 mmol) (hereinafter referred to as b-1-1), 1,4 was put into a 1000 ml three-necked round bottom flask -Diaminobenzene (4.3g, 40mmol) (hereinafter referred to as b-2-1) and 100g of N-methyl-2-pyrrolidone (hereinafter referred to as NMP), the resulting suspension is stirred until a light yellow solution is obtained; 19.6g (100mmol) of 1,2,3,4-cyclobutanetetracarboxylic dianhydride (hereinafter referred to as a-1) and 100g of NMP were added to the system, the reaction was exothermic, and the mixture was stirred at room temperature for 6 hours to obtain the polymer in NMP. Amamic acid polymer A-1-1.

[0080] Using the preparation method of Example 3, the type and amount of monomers were changed to prepare polymers A-1-2, A-1-3, A-1-4, A-1-5, A-1-6, A-1-7, A-1-8, A-1-9, A-1-10 and comparative polymer A-2-1, A-2-2, A-2-3, A-2- 4. See...

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Abstract

The invention belongs to the technical field of liquid crystal display and in particular relates to a liquid crystal orientation agent, a liquid crystal orientation membrane and a liquid crystal display element. The liquid crystal orientation agent is prepared from a diamine monomer with a di(tri)-cyclohexyl main chain and other tetracarboxylic acid dianhydride monomers through polymerization. Because of a di-cyclohexyl main chain type typical liquid crystal structure in the diamine monomer, the liquid crystal orientation membrane prepared by using a method provided by the invention has a relatively high contrast ratio; the liquid crystal orientation agent provided by the invention comprises a light reactive polymer component of a fluoro-4,4'-biphenol biallyl ether compound structure, andbecause of a special biphenyl structure of biphenol, and due to introduction of a fluoro-substitution group, the orientation stability can be improved.

Description

Technical field [0001] The present invention belongs to the technical field of liquid crystal display, and in particular relates to a liquid crystal alignment agent, a liquid crystal alignment film and a liquid crystal display element. Background technique [0002] Liquid crystal is a substance with a certain order between solid and liquid, and has the characteristics of photoelectric dynamic scattering. Display elements manufactured using the complex optoelectronic properties of liquid crystals have been widely used in various image display technologies. [0003] The conventional liquid crystal cell has a liquid crystal alignment layer, whose function is to arrange the liquid crystal molecules in a certain direction and angle. This alignment layer directly affects the display performance of the liquid crystal display. There are many kinds of alignment materials used in liquid crystal displays, and the most mature and widely used one is polyimide. There are also many methods for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56C08G73/10G02F1/1337
CPCC08G73/1007C08G73/1042C08G73/1067C08G73/1071C08G73/1078C09K19/56G02F1/1337
Inventor 吕公鑫周雨生胡葆华王辉程张俊苏峻纬
Owner JIANGSU SUNERA TECH CO LTD
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