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Liquid crystal alignment agent, liquid crystal alignment film and its forming method, liquid crystal display element, polyamic acid and imidized polymer

A technology for liquid crystal display elements and liquid crystal alignment agents, which is applied in the fields of liquid crystal materials, organic chemistry, chemical instruments and methods, etc., can solve the problem of large cumulative exposure, insufficient electrical characteristics and afterimage characteristics of liquid crystal display elements, and insufficient sensitivity. and other problems, to achieve the effects of excellent light sensitivity, excellent electrical characteristics and afterimage characteristics, and reduction of manufacturing costs

Inactive Publication Date: 2016-04-13
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, conventionally known materials for liquid crystal alignment films used in the photo-alignment method do not have sufficient sensitivity to light, and thus have the disadvantage that a large cumulative exposure amount is required to impart alignment to liquid crystals.
Moreover, the liquid crystal alignment of the liquid crystal alignment film obtained from the above-mentioned known materials cannot be said to be sufficient.
In addition, the electrical characteristics and afterimage characteristics of liquid crystal display elements including such a liquid crystal alignment film are not fully satisfied.

Method used

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  • Liquid crystal alignment agent, liquid crystal alignment film and its forming method, liquid crystal display element, polyamic acid and imidized polymer
  • Liquid crystal alignment agent, liquid crystal alignment film and its forming method, liquid crystal display element, polyamic acid and imidized polymer
  • Liquid crystal alignment agent, liquid crystal alignment film and its forming method, liquid crystal display element, polyamic acid and imidized polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0149] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited by these examples.

[0150]

[0151] Synthesis example d-1

[0152] Compound (d1-1) was synthesized according to Scheme 1 below.

[0153] [chemical 7]

[0154]

[0155] Process 1

[0156] (1) Synthesis of compound (d1-1A)

[0157] 171g of 4-nitrothiophenol, 180g of potassium carbonate, and 2L of N,N-dimethylformamide were charged into a 5L three-necked flask with a thermometer and a nitrogen inlet tube, and 216g of 4-nitrobenzyl bromide was added to form The reaction was carried out at room temperature for 2 hours. After completion of the reaction, 10 L of ethyl acetate was added to the reaction mixture, followed by liquid separation washing with dilute hydrochloric acid and water. After drying the organic layer with magnesium sulfate, the solid obtained by removing the solvent under reduced pressure was recrystallized with ethano...

Embodiment 1

[0204] N-methyl was added to a polymer solution containing the polyamic acid (P-1) obtained in Synthesis Example p-1 above (the amount corresponding to 100 parts by weight in terms of polyamic acid solids) -2-pyrrolidone (N-methyl-2-pyrrolidone, NMP) and butyl cellosolve (ButylCellosolve, BC), further adding N,N,N',N'-tetraglycidyl-4,4 20 parts by weight of '-diaminodiphenylmethane was fully stirred to obtain a solution having a solvent composition of NMP:BC=60:40 (weight ratio) and a solid content concentration of 2.5% by weight. This solution was filtered using a filter with a pore diameter of 1 μm, thereby preparing a liquid crystal alignment agent (A-1).

Embodiment 2～ Embodiment 8 and comparative example 1 and comparative example 2

[0206] In the above-mentioned Example 1, except that the polymer described in Table 1 was used instead of the polyamic acid (P-1) as the polymer, the liquid crystal alignment agent (A-2) was prepared in the same manner as in Example 1, respectively. )~liquid crystal alignment agent (A-8), liquid crystal alignment agent (B-1) and liquid crystal alignment agent (B-2).

[0207] Using each of the liquid crystal alignment agents prepared in the above-mentioned examples and comparative examples, a liquid crystal display element was manufactured as follows, and evaluated.

[0208] All results are shown in Table 1.

[0209]

[0210] Use a spinner to apply each liquid crystal alignment agent prepared above on the transparent electrode surface of a glass substrate with a transparent electrode including an ITO film, and heat (pre-baked) on a hot plate at 80° C. for 1 minute. It heated (post-baked) for 1 hour in the clean oven of 200 degreeC, and formed the coating film with a film thi...

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Abstract

The invention provides a liquid crystal aligning agent having high light sensitivity and capable of making a liquid crystal display element with excellent liquid crystal alignment, electrical performances and incidental image characteristics even in a low light exposure condition. The invention further provides a liquid crystal aligning film and a forming method thereof, the liquid crystal display element, a polyamide acid, an imidized polymer and a compound. The liquid crystal aligning agent is characterized by comprising polymers with benzene rings and -SCH2-or CH2S.

Description

technical field [0001] The invention relates to a liquid crystal alignment agent, a liquid crystal alignment film and its forming method, a liquid crystal display element, a polyamic acid, an imidized polymer and a compound. Background technique [0002] Liquid crystal display elements (Liquid Crystal Display, LCD) are widely used in televisions, various displays, and the like. As the liquid crystal display element, there are known liquid crystal display elements including various liquid crystal cells such as twisted nematic (Twisted Nematic, TN) type, super twisted nematic (Super Twisted Nematic, STN) type, in-plane switching (InPlane Switching, IPS) type, and the like. In addition, liquid crystal display elements including liquid crystal cells such as fringe field switching (FringeFieldSwitching, FFS) types such as changing the electrode structure of the IPS type liquid crystal cell and improving the aperture ratio (apertureratio) of the display element part are known (Pat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56G02F1/1337C08G73/10C07C323/36C07C323/29
CPCC08G73/1064C08G73/1071C08G73/1075C08L79/08C09K19/56G02F1/133723
Inventor 秋池利之
Owner JSR CORPORATIOON
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