A kind of diamine compound and application thereof for preparing liquid crystal aligning agent
A technology of liquid crystal alignment agent and amine compound, which is applied in the field of liquid crystal display, can solve problems such as static interference, display, and abnormal display, and achieve the effects of eliminating static electricity, accelerating dispersion speed, and shortening residence time
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Synthetic example 1
[0052] The compound represented by Synthetic Example 1 Structural Formula 1-1 can be synthesized according to the following synthetic route:
[0053]
[0054] (1) Synthesis of compound 1-1-a
[0055] 3,4-diaminonitrobenzene (15.30 g, 100 mmol), Et 3 N (50.60g, 500mmol) and 200g toluene, raise the temperature of the system to 60°C, wait until the system is stirred to form a homogeneous phase, then lower it to 0-10°C, then slowly add 2-trimethylsilylethoxy to the system dropwise The mixed solution of acid chloride (18.98g, 110mmol) and 100g toluene was added dropwise in about 0.5 hours, and then kept for 8 to 10 hours, followed by TLC until no raw material 3,4-diaminonitrobenzene remained. Then raise the reaction system to room temperature, stop stirring and then filter with suction to remove the inorganic salts in the system, wash with 500mL*3 deionized water three times, dedry the upper organic phase to obtain a light yellow solid, add 500mL methanol / water mixed The suspe...
Synthetic example 2-5
[0066] The compounds represented by Structural Formula 1-2 to Structural Formula 1-5 can be synthesized according to the above-mentioned synthetic route by using the corresponding compounds of their respective parent materials. The specific yield, high-resolution mass spectrometry results and elemental analysis results of each product are shown in Table 1 below, wherein the high-resolution mass spectrometry is HPLC-MC, and [M+1] is used to characterize the molecular ion peak of the corresponding compound; among them, the element Analytical tester brand: American Jialian, model: CE-440.
[0067] Yield, mass spectrum, elemental analysis data of each compound in table 1 synthesis example 2-5
[0068]
[0069] (2) Synthesis example of polymer A
[0070] Polymer Synthesis Example 1
[0071] Under a nitrogen atmosphere, in a 500mL three-necked round-bottomed flask, drop into a diamine compound represented by formula 1-1 (42.0g, 50 mmol) (hereinafter referred to as b-1-1), p-phe...
Embodiment 1
[0099] a. Liquid crystal alignment agent
[0100] Under nitrogen protection, drop into the polymer (A-1-1) of 100 weight parts, the NMP (hereinafter referred to as B-1) of 150 weight parts and the ethylene glycol monobutyl ether (hereinafter referred to as B-1) of 150 weight parts in the three-necked round bottom flask Abbreviated as B-2), the system was stirred at room temperature for 60 minutes, and then the solution was filtered through a 0.2 μm filter membrane to form the liquid crystal aligning agent of Example 1.
[0101] b. Liquid crystal alignment film and liquid crystal display element
[0102] The liquid crystal aligning agent of Example 1 was coated on a first glass substrate with an ITO electrode by spin coating to form a pre-coat layer. After pre-curing (hot plate, 80°C, 10 minutes), main curing (circulation oven, 220°C, 50 minutes), exposure (254nm polarized light, 5mW / cm 2 , 1000mj / cm 2 ) will obtain the first glass substrate with the liquid crystal alignment...
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