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Liquid crystal aligning agent for photo-alignment treatment method, and liquid crystal aligning film using the liquid crystal aligning agent

A technology of liquid crystal alignment agent and liquid crystal alignment film, applied in optics, nonlinear optics, instruments, etc., can solve the problem of insufficient stability of alignment control force

Active Publication Date: 2016-11-23
NISSAN CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the past, the liquid crystal alignment control force and stability of the liquid crystal alignment film obtained by the photo-alignment method were insufficient, and it was difficult to satisfy the above characteristics.

Method used

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  • Liquid crystal aligning agent for photo-alignment treatment method, and liquid crystal aligning film using the liquid crystal aligning agent
  • Liquid crystal aligning agent for photo-alignment treatment method, and liquid crystal aligning film using the liquid crystal aligning agent
  • Liquid crystal aligning agent for photo-alignment treatment method, and liquid crystal aligning film using the liquid crystal aligning agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0242] The following examples are given to illustrate the present invention more specifically, but the present invention is not limited thereto. In addition, the abbreviations of the compounds used in the present Examples and Comparative Examples and the measurement methods of each characteristic are as follows.

[0243] NMP: N-methyl-2-pyrrolidone

[0244] BCS: Butyl Cellosolve

[0245] GBL: gamma-butyrolactone

[0246] AIBN: 2,2'-azobisisobutyronitrile

[0247] DA-1: the following formula (DA-1)

[0248] DA-2: the following formula (DA-2)

[0249] MA1: following formula (MA-1)

[0250]

[0251] [viscosity]

[0252] In the synthesis example, the viscosity of the polyamic acid ester and the polyamic acid solution was measured using an E-type viscometer TVE-22H (manufactured by Toki Sangyo Co., Ltd. (Toki Sangyo Co., Ltd.)) with a sample volume of 1.1 mL and a conical rotor TE-1 ( 1°34', R24) and temperature 25°C.

[0253] [molecular weight]

[0254] In addition, th...

Synthetic example 1）

[0266] 2394 g of NMP was added to a 3000 mL four-necked flask equipped with a stirring device and a nitrogen gas introduction tube, and 196.34 g (1.00 mol) of 1,2,3,4-cyclobutanetetracarboxylic dianhydride was added. While stirring the slurry of tetracarboxylic dianhydride, add 101.11g (0.935mol) of p-phenylenediamine, then add NMP to make the solid content concentration 8% by mass, and stir at room temperature for 24 hours to obtain polyamic acid (PAA- 1) solution. The viscosity of this polyamic acid solution at a temperature of 25° C. was 115 mPa·s.

Synthetic example 2）

[0268] Take 5.73g (20.0mmol) of 1,5-bis(4-aminophenoxy)pentane in a 100mL four-necked flask with a stirring device and a nitrogen inlet tube, add 65.4g of NMP, and stir while delivering nitrogen. Let it dissolve. While stirring this diamine solution, add 4.19 g (19.2 mmol) of pyromellitic dianhydride, then add NMP so that the solid content concentration becomes 12% by mass, and stir at room temperature for 24 hours to obtain polyamic acid (PAA-2). The solution. The viscosity of this polyamic acid solution at a temperature of 25° C. was 520 mPa·s.

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Abstract

Provided are a liquid crystal orientation film with which it is possible to alleviate an afterimage resulting from AC driving which occurs with an IPS drive format or an FFS drive format liquid-crystal display element, and a liquid crystal orientation liquid for a light orientation processing technique for said film. A liquid crystal orientation liquid for a light orientation processing technique includes a constituent (A), a constituent (B), and an organic solvent, wherein the degree of inclusion of the constituent (B) is 0.1-15 parts to 100 parts of the constituent (A). Constituent (A): one or more polymers, wherein by illuminating with polarized light, one of the following reactions progresses: photolysis, photodimerization, or photoisomerization, and wherein an anisotropy is applied in either the same direction as the polarized light direction or the perpendicular direction to the polarized light direction. Constituent (B): a polymer having a structure which is represented with formula (1), following: (Chemical Formula 1) (Wherein W1 and W2 are independent bivalent organic groups including an aromatic group with 6-30 carbons, and A is a bivalent organic group including an alkylene group with 2-20 carbons.

Description

technical field [0001] The present invention relates to a liquid crystal aligning agent for producing a liquid crystal aligning film, and a liquid crystal aligning film obtained from the liquid crystal aligning agent. More specifically, it relates to a liquid crystal aligning agent for forming a liquid crystal aligning film capable of imparting liquid crystal aligning ability by photoalignment treatment, that is, irradiation of polarized ultraviolet rays instead of rubbing treatment, and a liquid crystal aligning agent obtained from the liquid crystal aligning agent. membrane. Background technique [0002] The liquid crystal display element used for a liquid crystal television, a liquid crystal display, etc. is normally provided with the liquid crystal aligning film for controlling the orientation state of a liquid crystal in an element. [0003] At present, according to the most popular method in the industry, the surface of the film formed on the electrode substrate by po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337C08L79/08
CPCC08L79/08C08L2205/02G02F1/133723G02F1/133788
Inventor 作本直树饭沼洋介野口勇步堀隆夫
Owner NISSAN CHEM CORP
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