Liquid crystal tropism agent, liquid crystal tropism film and liquid crystal display element

A liquid crystal alignment agent, general formula technology, used in liquid crystal materials, optics, instruments, etc.

Active Publication Date: 2009-07-01
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In these existing technologies, for the formation of liquid crystal alignment agents for today's liquid crystal alignment films that require further improvement, there is...

Method used

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  • Liquid crystal tropism agent, liquid crystal tropism film and liquid crystal display element
  • Liquid crystal tropism agent, liquid crystal tropism film and liquid crystal display element
  • Liquid crystal tropism agent, liquid crystal tropism film and liquid crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0341] Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples. The compounds used in the examples are as follows.

[0342]

[0343] Compound (1): Pyromellitic Dianhydride: PMDA

[0344] Compound (19): 1,2,3,4-cyclobutanetetracarboxylic dianhydride (1,2,3,4-cyclobutanetetracarboxylic dianhydride): CBDA

[0345] Compound (23): 1,2,3,4-butanetetracarboxylic dianhydride: BT

[0346] Compound (37): 1,3,3a,4,5,9b-hexahydro-5(tetrahydro-2,5-dioxo-3-furyl)naphtho[1,2-c]furan-1 , 3-diketone (1,3,3a,4,5,9b-hexahydro-5(tetrahydro-2,5-dioxo-3-furanyl)naphoto[1,2-c]furan-1,3-dione) : TDA

[0347] Compound (49): 2,3,5-tricarboxycyclopentyl acetic dianhydride (2,3,5-tricarboxycyclopentyl acetic dianhydride): TCMP

[0348]

[0349] Compound: 1,4-bis(4-aminophenyl)-1,4-diazacyclohexane (1,4-bis(4-aminophenyl)-1,4-diazacyclohexane): DAC

[0350] Compound: 4,4'-(piperazine-1,4-diyl)bis(2-methylaniline): 3MPDA

[0351] Compound: 1,...

Synthetic example 1

[0374] Into a 100 mL four-necked flask equipped with a thermometer, a stirrer, a raw material input port, and a nitrogen gas introduction port, 3.651 g of compound DAC and 54.0 g of dehydrated NMP were added, and stirred and dissolved under a dry nitrogen stream. Next, 1.237 g of compound (1), 1.112 g of compound (19) and 15.0 g of dehydrated GBL were added and reacted at room temperature for 30 hours. When the reaction temperature rises during the reaction, the reaction is carried out by suppressing the reaction temperature to about 70°C or lower. Then, 25.0 g of BC was added to the obtained solution to obtain a polyamic acid solution having a concentration of 6% by weight. Let this polyamic acid be PA1. The weight average molecular weight of PA1 was 34,800.

[0375] The weight-average molecular weight of polyamic acid is obtained in the following manner: the obtained polyamic acid is diluted with a phosphoric acid-DMF mixed solution (phosphoric acid / DMF=0.6 / 100: weight rat...

Synthetic example 2

[0376] [Synthesis Example 2 to Synthesis Example 31]

[0377] Except changing tetracarboxylic dianhydride and diamine as shown in Table 1 and Table 2, polyamic-acid solution (PA2) - polyamic-acid solution (PA31) were prepared according to the synthesis example 1. Including Synthesis Example 1, the results are summarized in Table 1 and Table 2. In Synthesis Example 24 to Synthesis Example 28, polyamic acid could not be synthesized because a precipitate was deposited during the reaction.

[0378] [Table 1]

[0379] Synthesis example

[0380] [Table 2]

[0381] Synthesis example

[0382]

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PUM

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Abstract

The present invention provides a liquid crystal display component which can represent the necessary ion density and realize long-term stability of the ion density, a liquid crystal aligning film which represents necessary ion density and realizes the long-term stability of ion density in the liquid display component, and a liquid crystal aligning agent which can form the liquid crystal aligning film. According to the invention, the liquid crystal aligning film is formed by the liquid crystal aligning agent which comprises the polyamic acid or the derivative thereof, and furthermore the liquidcrystal aligning film is used in the liquid crystal display component. The polyamic acid is the reaction product of specific diamine and tetracarboxylic dianhydride, wherein the specific diamine comprises piperazine.

Description

technical field [0001] The invention relates to a liquid crystal alignment agent, a liquid crystal alignment film obtained from the liquid crystal alignment agent, and a liquid crystal display element having the liquid crystal alignment film. The liquid crystal alignment agent contains diamine that has piperazine on the main chain (diamine) polyamic acid (polyamic acid) obtained by reacting with tetracarboxylic dianhydride (tetracarboxyli cdianhydride) or its derivatives. Background technique [0002] Liquid crystal display elements are used in various types of display devices such as viewfinders of video cameras and projection displays represented by monitors of notebook computers and desktop personal computers. Liquid crystal display devices are also used in televisions recently. In addition, liquid crystal display elements are also used in optoelectronic related elements such as optical printer heads, optical Fourier transform devices, and light valves. [0003] Various...

Claims

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Application Information

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IPC IPC(8): G02F1/1337G02F1/1333
CPCC09K19/56G02F1/1337
Inventor 近藤史尚
Owner JNC CORP
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