Liquid crystal aligning agent, liquid crystal aligning film, liquid crystal display element, method for producing liquid crystal display element, polymer, and compound
A technology of liquid crystal aligning agent and compound, which is applied in the field of liquid crystal aligning agent, polymer and compound, which can solve the problems of uneven display, not yet reached the practical level, adverse effects of voltage retention characteristics, etc., and achieve fast response and long-term reliability Excellent, wide viewing angle effect
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Embodiment 1A
[0280] Example 1A: Synthesis of Compound (0A-1)
[0281] In a 100mL three-necked flask equipped with a nitrogen inlet tube and a reflux tube, add 6.0g of 3,4-epoxycyclohexylethyltrimethoxysilane, 0.64g of sodium hydroxide, 0.50g of water and 24mL of isopropanol, and reflux 8 hours. After completion of the reaction, the supernatant was removed, and a crude purified compound (0A-1) was obtained by fractionated GPC, followed by recrystallization in toluene to obtain 0.85 g of white crystals of the compound (0A-1).
Embodiment 2A
[0282] Example 2A: Synthesis of compound (1-1-1)
[0283] 6.8 g of compound (0A-1), 80 mL of tetrahydrofuran, and 1.6 g of triethylamine were added to a 200 mL three-necked flask equipped with a nitrogen introduction tube, a dropping funnel, and a thermometer, and cooled in an ice bath. Next, 0.92 g of methyldichlorosilane and 20 mL of tetrahydrofuran were added to the dropping funnel, and after slowly adding them dropwise, the mixture was returned to room temperature and stirred overnight. After completion of the reaction, the reaction solution was poured into 400 mL of methanol to form a precipitate, which was recovered by filtration and recrystallized in toluene to obtain 3.4 g of white crystals of compound (1-1-1).
Embodiment 3A
[0284] [Example 3A: Synthesis of Polymer (1-1P-1)]
[0285] Polymer (1-1P-1) was synthesized according to Scheme 10 below.
[0286] [chem 28]
[0287]
[0288] Into a 100 mL three-neck flask equipped with a nitrogen gas introduction tube and a reflux tube, 3.4 g of compound (1-1-1), 0.53 g of an isocyanuric acid derivative (trade name DA-MGIC (manufactured by Shikoku Chemicals)) and 20 mL of tetrahydrofuran were added Thereafter, 10 μL of a platinum-divinylsiloxane complex xylene solution (concentration: 2.1%) was added, and the mixture was refluxed for 8 hours. After completion of the reaction, it was poured into 200 mL of methanol to form a precipitate, which was collected by filtration and vacuum-dried to obtain 3.0 g of a polymer (1-1P-1). The Mw of the obtained polymer (1-1P-1) was 23,000.
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