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Diamine, polyamic acid and polyimide produced with the same

A technology of polyamic acid and phenylene, which is used in organic chemistry, liquid crystal materials, steroids, etc., can solve the problem of inability to make large changes, and achieve the effect of large pretilt angle and good alignment properties.

Inactive Publication Date: 2008-08-20
DAILY POLYMER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent is mainly to solve various problems that may occur when the composition is coated and to adjust the pre-tilt angle arbitrarily. However, from the results of the examples, it seems that the range of the pre-tilt angle is only between 2.7 and 8.9. , but cannot make large changes (such as approaching 90° pretilt angle)

Method used

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  • Diamine, polyamic acid and polyimide produced with the same
  • Diamine, polyamic acid and polyimide produced with the same
  • Diamine, polyamic acid and polyimide produced with the same

Examples

Experimental program
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Effect test

preparation example Construction

[0069] The diamine of the present invention can be prepared by a general diamine preparation method, for example, using acid or alcohol and nitrobenzene (such as 4-chloro-nitrobenzene) with a good leaving group (good leaving group, such as halogen) After the substitution reaction, followed by the reduction reaction in the system. The common preparation method of a specific embodiment of the diamine of the present invention is to react the following formula (i) and / or the following formula (ii) with the following formula (iii), and then selectively carry out a reduction reaction. have to:

[0070]

[0071] , in the above formulas (i) and (ii), R' and "are hydrogen or oxygen respectively, and G 1 and G 2 Respectively a group selected from: carboxyl (carboxyl), halogen, hydroxyl or amino group, in the formula (iii), X 1 and Y 1 are respectively selected from: carboxyl, halogen, hydroxyl or amino groups, and R is the range defined in the above formula (I). When R' and R " ...

Embodiment 1

[0094] [Example 1] Preparation of diamine

[0095] According to the following table 1, select the starting material (the compound shown in the formula (iv)) of each embodiment, and then according to the diamine production method in the above-mentioned common production method, respectively prepare the diamine of embodiment 1 (A) ~ (H). The diamines (A)~(H) of embodiment 1 are respectively as follows Figure 3-5 shown.

[0096] In order to verify the structure of the obtained diamine (E), a nuclear magnetic resonance spectrometer (manufactured by a German company, model Bruker Avance 600) was used for structural identification, and the obtained results were as follows:

[0097] Compound shown in formula (v) [wherein R is CH 2 -CH(C 14 h 29 )]:

[0098] 1 H-NMR (400MHz, CDCl 3 ), δ (ppm): 8.21 (dd, 4H); 6.99 (dd, 4H);

[0099] 4.80(t, 1H); 4.23(d, 2H); 1.85(t, 2H); 1.25(t, 20H); 0.88(d, 3H).

[0100] Diamine (E):

[0101] 1 H-NMR (400MH, CDCl 3 ), δ (ppm): 6.78 (dd,...

Embodiment 2

[0107] [embodiment 2] the preparation of polyamic acid and polyimide

[0108] According to the content ratio in Table 2 below, use the above-mentioned diamine (A), diamine (E) or BAPP as the diamine component, and use PMDA as the dianhydride, and then use the polyamic acid and The preparation method of polyimide can be prepared respectively to obtain the polyimide layers numbered 2-1 to 2-9 formed on the ITO glass.

[0109] test:

[0110] According to the above-mentioned sample production process and the ITO glass with the polyimide layer formed on the above-mentioned numbers 2-1 to 2-9 were used for sample production, and the samples numbered 2-1 to 2-9 were respectively obtained, Then, tests were carried out using the above-mentioned pretilt angle measurement and alignment property observation methods, and the results are summarized in Table 2 below.

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Abstract

The invention relates to a diamine, the diamine is shown as the following formula (I), X and Y in the formula (I) are bivalent bond groups which are respectively selected from -O-, -(C=O)-O-, -O-(C=O)-,-(C=O)-NH- or -NH-(C=O)-, and the R is a group which is limited according to the instructions and the patent claims. The invention also provides polyamic acid and polyimide which are prepared by utilizing the diamine and are used as liquid crystal aligning agents.

Description

technical field [0001] The present invention relates to a new diamine, in particular to a diamine used to prepare polyimide used as a liquid crystal aligning agent (liquid crystal aligning agent), and the polyamic acid prepared by using the diamine and polyimide. Background technique [0002] With the rapid development of personal information products (such as notebook computers, mobile phones, digital cameras and personal electronic assistants, etc.), coupled with the advantages of liquid crystal displays, such as thin and light, low power consumption, etc., liquid crystal displays have become a variety of information products. necessary components. The liquid crystal layer in the liquid crystal display uses an external electric field to change its alignment state, and changes the light passing through the liquid crystal layer, and various liquid crystal displays can be made by using the different alignment states of the liquid crystal layer, such as twisted nematic (twis...

Claims

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Application Information

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IPC IPC(8): C07J9/00C07C217/78C08G73/10C09K19/56
Inventor 颜传特黄志雄黄昭敬高进旺洪亭慧
Owner DAILY POLYMER CORP
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