Liquid crystal alignment agent, liquid crystal alignment film and liquid crystal display element
A technology of liquid crystal aligning agent and tetracarboxylic dianhydride, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, etc., and can solve problems such as residual images of liquid crystal display components
Active Publication Date: 2022-04-19
NISSAN CHEM IND LTD
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Problems solved by technology
[0004] In addition, if charges are accumulated in the liquid crystal alignment film, there is also a problem of image sticking in the liquid crystal display element.
Method used
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Embodiment 1
[0192] 19.3 g of polyamic-acid solutions A1 and 80.7 g of B2 were mixed and stirred at room temperature for 2 hours to obtain 100 g of a polymer solution (D1) in which the weight ratio of the polymer solid content was A1:B2=2:8.
Embodiment 2
[0194] 29.3 g of polyamic-acid solutions A1 and 70.7 g of B2 were mixed and stirred at room temperature for 2 hours to obtain 100 g of a polymer solution (D2) in which the weight ratio of the polymer solid content was A1:B2=3:7.
Embodiment 3
[0196] 19.3 g of polyamic-acid solution A1 and 80.7 g of B3 were mixed, and it stirred at room temperature for 2 hours, and obtained 100 g of polymer solutions (D3) whose weight ratio of polymer solid content was A1:B3=2:8.
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A liquid crystal aligning agent containing a following (A) component and a following (B) component. In addition, the definition of the symbol in following formula (1) - following formula (3) is as described in specification. (A) component: a polyamic acid obtained by reacting a tetracarboxylic dianhydride component and a diamine component. The tetracarboxylic dianhydride component contains tetracarboxylic dianhydride containing an aromatic structure. Since the structure has at least one diamine of any one of the following (1) to (3) and p-phenylenediamine, (B) component: the terminal has a diamine selected from the group consisting of epoxy, vinyl, and benzene An alkoxysilane compound of a group consisting of a vinyl group, a methacryloyl group, an acryloyl group, a urea group, a mercapto group, and an isocyanate group.
Description
technical field [0001] This invention relates to the liquid crystal aligning agent used when forming a liquid crystal aligning film, a liquid crystal aligning film, and a liquid crystal display element using the same. Background technique [0002] Liquid crystal display elements are now widely used as display devices. The liquid crystal aligning film which is a structural member of a liquid crystal display element is a film which arranges liquid crystal uniformly, and various characteristic improvement is requested|required for high-quality liquid crystal display elements in recent years. [0003] For example, in order to obtain a liquid crystal display element with high display quality, it is important to exhibit high brightness. Therefore, higher transmittance is required for a liquid crystal aligning film. [0004] Moreover, when electric charge accumulates in a liquid crystal aligning film, there exists a problem that image sticking will generate|occur|produce also in ...
Claims
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IPC IPC(8): G02F1/1337C08G73/10
CPCC08G73/10G02F1/1337C09K19/56G02F1/133723
Inventor 中原翔一朗金信郁石川和典
Owner NISSAN CHEM IND LTD
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