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

A technology of liquid crystal alignment agent and carbon number, which is applied in the direction of liquid crystal materials, optics, instruments, etc., can solve the problems of general products without suitable structure and inconvenience, and achieve the effect of good long-term reliability and high voltage retention rate

Inactive Publication Date: 2010-06-09
JNC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] It can be seen that the above-mentioned existing liquid crystal alignment agent, liquid crystal alignment film and liquid crystal display element obviously still have inconvenience and defects in structure and use, and need to be further improved urgently.
In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0239] Hereinafter, the present invention will be explained through examples, but the present invention is not limited to these examples. The compounds used in the examples are as follows.

[0240]

[0241] Carboxylic acid (1): pyromellitic dianhydride (pyromellitic dianhydride)

[0242] Carboxylic acid (19): 1,2,3,4-cyclobutanetetracarboxylic dianhydride

[0243]

[0244] Diamine (VI-7): 1,4-bis(4-aminophenyl)-1,4-diazepine

[0245] Diamine (V-1): 4,4'-Diaminodiphenylmethane

[0246] Diamine (V-7): 1,2-bis(4-aminophenyl)ethane

[0247] Diamine (XII-4-1): 1,1-bis[4-(4-aminophenoxy)phenyl-4-(trans-4-n-pentylcyclohexyl)cyclohexane

[0248] Diamine (XII-2-1): 1,1-bis[4-(4-aminophenylmethyl)phenyl]-4-n-heptylcyclohexane

[0249] Diamine (N-1): 1,4-bis(4-aminophenoxy)naphthalene

[0250] Diamine (V-36): N,N'-bis(4-aminophenyl)-N,N'-dimethylethylenediamine

[0251]

[0252] NMP: N-methyl-2-pyrrolidone

[0253] BC: Butyl cellosolve (ethylene glycol monobutyl ether)

[0254]

Synthetic example 1

[0256] Into a 100 mL four-necked flask equipped with a thermometer, a stirrer, a raw material input addition port, and a nitrogen introduction port, 2.242 g of diamine (VI-7), 1.072 g of diamine (N-1), and 0.569 g of diamine ( XII-2-1) and 80.0 g of dehydrated NMP were stirred and dissolved under a stream of dry nitrogen. Next, 0.683 g of carboxylic acid (1) and 1.434 g of carboxylic acid (19) were added, and they were reacted for 30 hours in a room temperature environment. When the reaction temperature rises during the reaction, the reaction temperature is suppressed to 70°C or less and allowed to react. Then, 14.0 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 is 40,100.

[0257] The weight average molecular weight of the polyamic acid is obtained by the following method: the obtained polyamic acid is diluted with a phosphoric acid-...

Synthetic example 2～7

[0259] Except for changing the tetracarboxylic dianhydride and diamine as shown in Table 1, according to Synthesis Example 1, polyamic acid solutions (PA2) to (PA7) were prepared. Including Synthesis Example 1, the results are summarized in Table 1.

[0260]

[0261]

[0262]

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Abstract

The invention aims to develop a valuable liquid crystal orientation agent, which has the characteristics for composing the liquid crystal display component achieving high voltage conservation rate and long term stability of the high voltage conservation rate. The liquid crystal orientation agent of the invention is a composition containing polyamide acids or derivatives thereof; the polyamide acids is obtained by reacting the mixture of a specific diamine containing one naphthalene ring and two amino phenyls and other diamines, and tetracarboxylic dianhydride.

Description

Technical field [0001] The present invention relates to a liquid crystal alignment agent, in particular to a polyamic acid (polyamic acid) obtained by reacting a naphthalene-containing diamine and tetracarboxylic dianhydride in the main chain. ). Background technique [0002] Represented by the monitor of a notebook computer or a desktop computer, the liquid crystal display element is used in the viewfinder of a video camera, a projection display, etc. Among display devices, it has also been recently used in televisions. In addition, liquid crystal display elements are also used in optoelectronics-related elements such as optical printer heads, optical Fourier transform elements, and light valves. [0003] Various elements are known in liquid crystal display elements. The development of liquid crystal display element technology is not only realized by improving the driving method of the liquid crystal display element or the structure of the liquid crystal display element, but als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/56G02F1/1337
Inventor 近藤史尚伊泽启介
Owner JNC CORP
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