Liquid Crystal Alignment Agent Using Photoreactive Hydrogen-Bonding Polymer Liquid Crystal, And Liquid Crystal Alignment Film
A technology of photoreactivity and hydrogen atoms, applied in liquid crystal materials, optics, nonlinear optics, etc., can solve problems such as dust generation, static electricity, and inability to achieve liquid crystal orientation
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[0142]
[0143] The optically active composition used in the present invention is preferably used as a coating liquid because it is suitable for forming a coating film. That is, it is preferable to set it as the solution which melt|dissolved (A) component, (B) component, and various additives added as needed mentioned later in an organic solvent. At this time, the content of all the components (hereinafter also referred to as resin components) of (A) component, (B) component and various additives added as necessary is preferably 1% by mass to 20% by mass, more preferably 3% by mass to 15% by mass, particularly preferably 3% by mass to 10% by mass.
[0144]
[0145] The organic solvent used in the optically active composition of the present invention is not particularly limited as long as it dissolves the resin component. Specific examples thereof are listed below.
[0146] Examples include N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, N-methylcapr...
Embodiment 1
[0219] M6CA (12.41 g, 35.0 mmol) was dissolved in THF (111.7 g), and after degassing with a diaphragm pump, AIBN (0.287 g, 1.8 mmol) was added and degassed again. Then, it was made to react at 60 degreeC for 30 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to diethyl ether (500 ml), and the resulting precipitate was collected by filtration. This deposit was wash|cleaned with diethyl ether, and it dried under reduced pressure in 40 degreeC oven, and obtained the methacrylate polymer powder (A). The polymer had a number average molecular weight of 11,000 and a weight average molecular weight of 26,000.
[0220] NMP (29.29g) was added to the obtained methacrylate polymer powder (A) (6.0g), and it stirred and melt|dissolved at room temperature for 5 hours. NMP (14.7g) and BC (50.0g) were added to this solution, and it stirred for 5 hours, and obtained the liquid crystal aligning agent (A1).
[0221] In addition, 0.03 ...
Embodiment 2
[0226] A liquid crystal cell was produced using the liquid crystal aligning agent (A2-5) obtained in Example 1, and the orientation of a low molecular weight liquid crystal was confirmed. The irradiation amount of polarized UV in the orientation treatment and the conditions of the heating temperature after the polarized UV irradiation were changed, and the conditions for obtaining the optimum orientation were confirmed.
[0227] [Production of liquid crystal unit]
[0228] The substrate was a glass substrate with a size of 30 mm×40 mm and a thickness of 0.7 mm, and a substrate on which comb-shaped pixel electrodes formed by patterning an ITO film were arranged was used. The pixel electrode has a comb-tooth shape formed by arranging a plurality of "く"-shaped electrode elements bent at the center. The width of each electrode element in the width direction was 10 μm, and the interval between electrode elements was 20 μm. The pixel electrode forming each pixel is formed by arran...
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Abstract
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