Liquid crystal orientation agent
A technology of liquid crystal aligning agent and organic group, applied in the field of liquid crystal aligning agent, can solve problems such as sintering, and achieve the effect of excellent sintering characteristics
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[0120] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these examples. Transparency, voltage retention, and sinterability of Examples and Comparative Examples were evaluated by the following methods.
[0121] [transparency]
[0122] As a measurement device, a HITACHI U-2010 spectrophotometer (manufactured by Hitachi, Ltd.) was used. On a quartz substrate with a thickness of 1.5mm, use a spinner to coat the liquid crystal alignment agent of the present invention prepared above, and dry it at 180°C for 1 hour to form a dry film thickness coating film. The measurement of the transmittance of the produced coating film was performed. For transmittance measurement, values at wavelengths of 700nm, 600nm, 500nm, 450nm, 400nm, 350nm and 300nm were obtained. The transmittance at any measurement wavelength was judged to be good when it was not less than 90%, and the case was judged not to be good othe...
Synthetic example 1
[0128] 224.17g (0.5 moles) of 2,3,5-tricarboxycyclopentylacetic acid dianhydride and 157.14g (0.5 moles) of 1,3,3a,4,5,9b-hexahydro-8-methyl-5- (Tetrahydro-2,5-dioxo-3-furyl)-naphtho[1,2-c]-furan-1,3-dione as tetracarboxylic dianhydride, 94.62g (0.875mol) to Phenylenediamine, 32.02g (0.1 mole) 2,2'-bistrifluoromethyl-4,4'-diaminobiphenyl and 6.43g (0.01 mole) 3,6-bis(4-aminobenzoyloxy base) cholesterol as a diamine compound, 10.85 g (0.03 mol) of 4-aminophenyl octadecyl ether as a monoamine was dissolved in 4,500 g of N-methyl-2-pyrrolidone, and reacted at 60° C. for 6 hours.
[0129] Then, the reaction solution was poured into a large excess of methanol to precipitate the reaction product. Then, it wash|cleaned with methanol, and dried at 40 degreeC under reduced pressure for 15 hours, and obtained the polyamic acid 410g of logarithmic viscosity 0.87dl / g. 30 g of the obtained polyamic acid was dissolved in 570 g of N-methyl-2-pyrrolidone, 23.4 g of pyridine and 18.1 g of ac...
Synthetic example 2
[0131] 224.17g (0.5 moles) of 2,3,5-tricarboxycyclopentylacetic acid dianhydride and 157.14g (0.5 moles) of 1,3,3a,4,5,9b-hexahydro-8-methyl-5- (Tetrahydro-2,5-dioxo-3-furyl)-naphtho[1,2-c]-furan-1,3-dione as tetracarboxylic dianhydride, 94.62g (0.875mol) to Phenylenediamine, 24.85 g (0.1 mol) of bisaminopropyl tetramethyldisiloxane and 6.43 g (0.01 mol) of 3,6-bis(4-aminobenzoyloxy)cholesterol as diamine compounds, 10.85 g (0.03 mol) of 4-aminophenyl octadecyl ether was dissolved in 4,500 g of N-methyl-2-pyrrolidone as a monoamine, and reacted at 60° C. for 6 hours. Then, the reaction solution was poured into a large excess of methanol to precipitate the reaction product. Then, it wash|cleaned with methanol, and dried at 40 degreeC under reduced pressure for 15 hours, and obtained the polyamic acid 370g of logarithmic viscosity 0.82dl / g. Dissolve 30 g of the obtained polyamic acid in 570 g of N-methyl-2-pyrrolidone, add 23.4 g of pyridine and 18.1 g of acetic anhydride and ...
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