Liquid crystal alignment agent composition, method for manufacturing liquid crystal alignment film using same, and liquid crystal alignment film using same
A technology of liquid crystal alignment agent and liquid crystal alignment film, which is applied in liquid crystal materials, chemical instruments and methods, coatings, etc., and can solve problems such as inability to fully realize panel performance, large panel size, and column space curvature
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preparation example 1
[0184]
[0185] 18.3 g (100 mmol) of 2-chloro-5-nitropyridine (compound 1) and 12.5 g (98.6 mmol) of p-phenylenediamine (p-PDA, compound 2) were completely dissolved in 200 mL of dimethylsulfoxide (DMSO) middle. Then 23.4 g (200 mmol) of triethylamine (TEA) was added thereto and stirred at room temperature for 12 hours. When the reaction was complete, the reaction product was poured into a container containing 500 mL of water and stirred for 1 hour. The solid obtained by filtration was washed with 200 mL of water and 200 mL of ethanol to synthesize 16 g (61.3 mmol) of compound 3 (yield: 60%).
[0186]
[0187] Compound 3 was dissolved in 200 mL of a mixed solution of ethyl acetate (EA) and THF at a ratio of 1:1. 0.8 g of palladium (Pd) / carbon (C) was added thereto and stirred for 12 hours under a hydrogen atmosphere. After the reaction was completed, the reaction mixture was filtered through a celite pad, and the filtrate was concentrated to prepare 11 g of diamine of...
preparation example 2
[0189]
[0190] The diamine of Preparation Example 2 was prepared in the same manner as in Preparation Example 1 except that m-phenylenediamine (m-PDA) was used instead of p-phenylenediamine (p-PDA, Compound 2).
preparation example 3
[0192]
[0193] The diamine of Preparation Example 3 was prepared in the same manner as in Preparation Example 1, except that 2-chloro-4-nitropyridine was used instead of 2-chloro-5-nitropyridine (Compound 1).
[0194]
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