Liquid crystal alignment agent and liquid crystal display element
A liquid crystal aligning agent and polymer technology, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of uneven liquid crystal orientation and unsatisfactory, and achieve the effect of excellent afterimage performance.
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Synthetic example 1
[0152] Synthesis Example 1 (Synthesis of 1-(2,4-diaminophenoxy)-4-(4-(4-n-pentylcyclohexyl)cyclohexyl)benzene)
[0153] Synthesize 1-(2,4-diaminophenoxy)-4-(4-(4-n-pentylcyclohexyl)cyclohexyl)benzene (hereinafter, also referred to as "diamine A") according to the following synthetic route 1 ).
[0154]
[0155] Synthetic route 1
[0156] Under a nitrogen atmosphere, 20.3 g (0.1 mole) of 1-chloro-2,4-dinitrobenzene, 32.9 g (0.1 mole) of 4-(4-(4-n-pentylcyclohexyl) cyclohexyl) phenol and 41.4 g (0.3 mol) of potassium carbonate was dissolved in 500 ml of dimethylformamide, and the reaction was carried out at room temperature for 6 hours. After adding 500 ml of distilled water to the reaction solution and stirring well, it was extracted with 500 ml of chloroform, and the obtained organic layer was extracted with distilled water and washed. After the organic layer after washing is dehydrated with magnesium sulfate, adopt rotary evaporator to remove solvent, obtain 47.0g 1-(2,...
Synthetic example 2
[0158] Synthesis Example 2 (Synthesis of 4-(4-(4-n-pentylcyclohexyl)cyclohexyl)phenyl 3,5-diaminobenzoate)
[0159] 4-(4-(4-n-pentylcyclohexyl)cyclohexyl)phenyl 3,5-diaminobenzoate (hereinafter also referred to as "diamine B") was synthesized according to the following synthesis scheme 2.
[0160]
[0161] Synthetic route 2
[0162] Under a nitrogen atmosphere, 32.9 g (0.1 mole) of 4-(4-(4-n-pentylcyclohexyl) cyclohexyl) phenol, 10.6 g (0.105 mole) of triethylamine and 300 ml of tetrahydrofuran were mixed at 0° C. Stir to dissolve. To this solution, a mixed solution of 21.8 g (0.105 mol) of 3,5-dinitrobenzoyl chloride and 100 ml of tetrahydrofuran was added dropwise over 30 minutes, followed by stirring at room temperature for 3 hours to perform a reaction. After the precipitated salt was filtered off, the filtrate was concentrated, and 300 ml of chloroform was added to dissolve it completely, and extracted and washed with distilled water. The organic layer was dehydrate...
Synthetic example 3
[0165] According to the method described in Patent Document 2 (JP-A-09-278724), diamine C represented by the following formula was synthesized.
[0166]
[0167] Diamine C
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