Liquid crystal directional agent and liquid crystal displaying component
A technology of liquid crystal alignment agent and liquid crystal alignment film, which is applied in the direction of liquid crystal materials, static indicators, chemical instruments and methods, etc., can solve the problems of inability to form alignment film, alignment agent solubility and uniform coating properties, and achieve coating Excellent fabric properties, good storage stability, and good liquid crystal orientation
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[0100] The present invention will be described more specifically by way of examples below, but the present invention is not limited to these examples. The evaluation methods of each liquid crystal aligning agent and liquid crystal display element prepared according to the following examples and comparative examples are as follows.
[0101] [Print performance test of liquid crystal aligning agent]
[0102] Polymer or liquid crystal aligning agent is dissolved in the mixed solvent of gamma-butyrolactone / N-methylpyrrolidone / butyl cellosolve (77 / 3 / 20 (weight ratio)), and the solid content concentration that makes is 4% by weight solution, the solution was filtered through a filter with a pore size of 1 μm to prepare the liquid crystal aligning agent of the present invention. Using a liquid crystal alignment film printer (manufactured by Nippon Photo Printing Machine Co., Ltd.), the above-mentioned liquid crystal alignment agent is coated on the transparent electrode surface of a ...
Synthetic example 1
[0108] 224.17g (1 mole) of 2,3,5-tricarboxycyclopentylacetic acid dianhydride as tetracarboxylic acid dianhydride, 54.07g (0.5 mole) of p-phenylenediamine as diamine compound, 4,4" -Diamino-p-terphenyl 130.17g (0.5 moles) was dissolved in 4500g N-methyl-2-pyrrolidone, and reacted for 6 hours at 60 ° C. Then, the reaction solution was dropped into a large excess of methanol to allow the reaction The product is precipitated, then, washed with methanol, and dried at 40° C. under reduced pressure for 15 hours to obtain 380 g of polyamic acid with a logarithmic viscosity of 0.85 dl / g. 30 g of the gained polyamic acid are dissolved in 570 g of N-methyl- Add 23.4 g of pyridine and 18.1 g of acetic anhydride to 2-pyrrolidone, dehydrate and close the ring at 110° C. for 4 hours, carry out precipitation, washing, and decompression in the same manner as above to obtain 18.5 g of acyl chloride with a logarithmic viscosity of 0.94 dl / g. A polyimide having an amination rate of 90% (this is ...
Embodiment 1
[0123] 2 g of the imide polymer (B1) obtained in Synthesis Example 1 was dissolved in γ-butyrolactone to obtain a solution having a solid content concentration of 4% by weight, and the solution was filtered through a filter with a pore size of 1 μm to prepare Liquid crystal aligning agent of the present invention. Storage stability was evaluated.
[0124] Use a liquid crystal aligning agent coating printer to coat the above liquid crystal aligning agent on the transparent electrode surface of a glass substrate with an ITO film transparent electrode, and dry it on a heating plate at 180°C for 20 minutes to form a dry film with a thickness of 0.05 µm coating film, evaluate its printing performance.
[0125] Using a grinder equipped with a roll wound with rayon cloth, the coating film was polished under the conditions that the roll speed was 500 rpm, the moving speed of the stage (ste-ji) was 1 cm / sec, and the indentation length of the fluff was 0.4 mm. deal with.
[0126] Nex...
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Abstract
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