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Diphenylamine compound, polyamic acid composition, polyimide composition and liquid crystal alignment agent prepared therefrom

A technology of polyamic acid and polyimide, applied in the field of diphenylamine series compounds, can solve the problem of afterimage on the screen, and achieve the effect of solving the problem of afterimage.

Active Publication Date: 2016-01-20
DAXIN MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, when the liquid crystal alignment film made of the above-mentioned diamines is subsequently applied to liquid crystal display elements, ionic charges will be generated after voltage is applied, and the ionic charges will be absorbed by the alignment film; after a long period of display, even in After stopping the voltage application, it is also difficult to detach the ionic charge from the alignment film, so it is easy to produce afterimages on the screen

Method used

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  • Diphenylamine compound, polyamic acid composition, polyimide composition and liquid crystal alignment agent prepared therefrom
  • Diphenylamine compound, polyamic acid composition, polyimide composition and liquid crystal alignment agent prepared therefrom
  • Diphenylamine compound, polyamic acid composition, polyimide composition and liquid crystal alignment agent prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0076] Bis(3-amino-4-methylbenzoic acid) 4,4'-(propan-2,2-diyl)bis(cyclohexyl-4,1-diyl)ester (P1)

[0077] Add 45.29g (0.25mol) of 4-methyl-3-nitrobenzoic acid (purchased from Acros) and 51.58g (0.25mol) of dicyclohexylcarbodiimide (DCC) into 288.46g of tetrahydrofuran (THF) and Mix well, and after 30 minutes, add 24.04g (0.10mol) 4,4'-(propane-2,2-diyl) dicyclohexanol (purchased from Sigma-Aldrich) and 2.44g (0.02mol) ) 4-dimethylaminopyridine (DMAP) and mix well. After reacting at room temperature for 8 hours, the filtrate was collected by filtration and concentrated to complete dryness. Then carry out recrystallization and purification 3 times with a mixed solvent of THF and isopropanol (IPA) (THF:IPA weight ratio is 4:6), and can obtain 42g bis(4-methyl -3-nitrobenzoic acid)4,4'-(propan-2,2-diyl)bis(cyclohexa-4,1-diyl)ester (I1, yield 73%) white solid.

[0078] Take 28.33g (0.05mol) of the above compound I1 and dissolve it in 152g THF, then add 2.83g Pd / C and 28.33g80% h...

Synthetic example 2

[0079] N,N'-(cyclohexyl-1,4-diyl)bis(3-amino-4-methylbenzamide) (P2)

[0080] Add 45.29g (0.25mol) 4-methyl-3-nitrobenzoic acid and 51.58g (0.25mol) DCC to 137.03gTHF and mix evenly. After 30 minutes, add 11.42g (0.10mol) 1 in sequence, 4-cyclohexanediamine (purchased from Acros) and 2.44 g (0.02 mol) of DMAP were mixed uniformly. After reacting at room temperature for 8 hours, the filtrate was collected by filtration and concentrated to complete dryness. Then recrystallize and purify 3 times with a mixed solvent of THF and n-hexane (THF:n-hexane weight ratio is 3:7), and drain the solid obtained from recrystallization to obtain 24g N,N'-(cyclohexane-1 ,4-diyl)bis(4-methyl-3-nitrobenzamide) (I2, 56% yield) white solid.

[0081] Take 22.02g (0.05mol) of the above-mentioned compound I2 and dissolve it in 114g THF, then add 2.20g of Pd / C and 22.02g of 80% hydrazine hydrate in sequence. After reacting at room temperature for 8 hours, the filtrate was collected by filtration an...

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Abstract

A diphenylamine compound is represented by the following formula (I). The ranges of each functional group and substituent in the formula (I) are as defined in the description and claims respectively. The polyamic acid composition or polyimide composition prepared by the diphenylamine compound of the present invention has the advantage of being able to effectively solve the problem of residual images of liquid crystal display elements when it is subsequently used as a liquid crystal alignment agent and forms a liquid crystal alignment film.

Description

technical field [0001] The present invention relates to a dianiline-based compound, in particular to a dianiline-based compound containing cyclohexylene, a polyamic acid (poly(amicacid)) composition and a polyamic acid composition obtained therefrom. A polyimide composition, and a liquid crystal alignment agent comprising the polyamic acid composition or the polyimide composition. Background technique [0002] A general liquid crystal display mainly utilizes liquid crystal molecules to rotate with changes in the electric field of the environment, thereby resulting in changes in the amount of light passing through and completing the display of images. Liquid crystal displays have attractive advantages such as small size, light weight, low power consumption, and good display quality, and have become the mainstream of flat-panel displays in recent years. [0003] With the expansion of the screen size, the development of the liquid crystal display has developed to a liquid crys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C229/60C07C237/38C07C227/04C07C231/12C08G73/10C09K19/56G02F1/1337G02F1/1333
Inventor 王柏扬蔡明睿
Owner DAXIN MATERIALS
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