Vertical orientated liquid crystal orientation agent and liquid crystal display member

A technology of liquid crystal display elements and liquid crystal alignment agents, applied in sliding fastener elements, fasteners, applications, etc., can solve the problems of uneven thickness of alignment film, mottled brightness, pinholes, etc., and achieve good vertical alignment and voltage retention The effect of high rate and good spreadability

Active Publication Date: 2012-03-21
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the substrate coatability of the liquid crystal aligning agent is poor, for example, uneven film thickness or pinholes will occur on the alignment film, which will cause display defects or uneven brightness.

Method used

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  • Vertical orientated liquid crystal orientation agent and liquid crystal display member
  • Vertical orientated liquid crystal orientation agent and liquid crystal display member
  • Vertical orientated liquid crystal orientation agent and liquid crystal display member

Examples

Experimental program
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specific example

[0060] As specific examples of diamines having groups represented by the above formula (Q-1), preferred examples include dodecyloxy-2,4-diaminobenzene, pentadecyloxy-2,4- Diaminobenzene, hexadecyloxy-2,4-diaminobenzene, octadecyloxy-2,4-diaminobenzene, compounds represented by the following formulas (13) to (29).

[0061] [chemical 11]

[0062]

[0063] [chemical 12]

[0064]

[0065] In addition, as R in the above formula (Q-2) 2 The divalent organic group having an alicyclic skeleton and having 4 to 40 carbon atoms, for example, includes alicyclic skeleton derived from cycloalkane such as cyclobutane, cyclopentane, cyclohexane, and cyclodecane. divalent organic groups; divalent organic groups with steroid skeletons such as cholesterol and cholestanol; divalent organic groups with bridging alicyclic skeletons such as norbornene and adamantane, etc. Among them, a divalent organic group having a steroid skeleton is particularly preferable. The aforementioned divalent ...

Embodiment

[0114] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited to these examples.

[0115] [Measuring method of imidization rate of imidized polymer]

[0116] After the imidized polymer is dried under reduced pressure at room temperature, it is dissolved in deuterated dimethyl sulfoxide, and measured at room temperature with tetramethylsilane as a standard substance 1H-NMR is obtained by the formula shown in the following formula (ii): have to.

[0117] Imidization rate (%) = (1-A 1 / A 2 ×α)×100 ------(ii)

[0118] A 1 : Proton original peak area of ​​NH group (10ppm)

[0119] A 2 : Original peak area of ​​other protons

[0120] α: The ratio of the number of other protons to the protons of the NH group in one polymer precursor (polyamic acid)

[0121] [Manufacturing method of liquid crystal display element]

[0122] On the glass substrate (A) and the glass substrate (B) with the ITO pattern of...

Synthetic example 1～14

[0133]With the composition shown in Table 1, diamine and tetracarboxylic dianhydride were sequentially added to N-methyl-2-pyrrolidone so that the concentration of solid content was 20%, and reacted for 4 hours while stirring at room temperature. Then, the solution was poured into a large excess of pure water to precipitate the reaction product, and then, the solid matter was separated and washed with pure water, and dried at 40° C. for 15 hours under reduced pressure to obtain a white powdery polyamic acid. The polyamic acid obtained in this way was dissolved in N-methyl-2-pyrrolidone so that the solid content concentration was 7%, and after adding pyridine and acetic anhydride in the ratios shown in Table 1 to 1 mole of repeating units, respectively, it was heated at 110° C. Heating for 4 hours for dehydration ring closure reaction. The resulting reaction solution was poured into a large excess of pure water to precipitate the reaction product. Then, the solid was separated...

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Abstract

The present invention provides a liquid crystal alignment agent having vertical alignability of a liquid crystal, a high voltage holding ratio and satisfactory coating properties.The vertical alignment type liquid crystal alignment agent contains an imidized polymer consisting of amic acid recurring units and imide recurring units which are obtained using special diamine component and having >=60mol% occupation ratio of the imide recurring units in the total recurring units.

Description

technical field [0001] The present invention relates to a vertical alignment type liquid crystal aligning agent and a liquid crystal display element. More specifically, it is related with the vertical alignment type liquid crystal aligning agent and liquid crystal display element which have favorable vertical alignment property, favorable applicability, and high voltage holding ratio simultaneously. Background technique [0002] Liquid crystal display elements represented by liquid crystal displays from the standpoint of space saving and low power consumption have been used in various fields and have been actively developed. As a conventional display method, a TN method and an STN method in which liquid crystal molecules having a positive conductivity anisotropy are used and liquid crystal molecules are driven from parallel to perpendicular to a substrate surface by applying a voltage are widely used. [0003] In recent years, in order to further improve the display quality...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/38G02F1/1337C08G73/10
CPCA44B19/34A44B19/36A44B19/42
Inventor 丸谷英三栗山敬祐六鹿泰显木村礼子
Owner JSR CORPORATIOON
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