Liquid crystal vertical self-alignment additive as well as preparation method and application thereof
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A vertical alignment and additive technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of increasing production costs, restricting, affecting the performance of liquid crystal media, etc.
Active Publication Date: 2020-04-21
BEIJING BAYI SPACE LCD MATERIALS TECH
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However, this method has obvious shortcomings: the coating process of PI alignment film is cumbersome and takes a long time, which greatly increases the production cost
Rubbing alignment type PI alignment film will generate dust and static electricity during the rubbing process, which will affect the performance of the liquid cryst
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Embodiment 1
[0134] The structural formula of the liquid crystal compound is:
[0135]
[0136] The synthetic route for preparing compound BYLC-01 is as follows:
[0137]
[0138] Specific steps are as follows:
[0139] (1) Synthesis of compound BYLC-01-1:
[0140] Under nitrogen protection, add 70g (0.299mol), 150ml tetrahydrofuran, temperature control -70~-80℃, dropwise add 0.35mol n-butyllithium n-hexane solution, after dropping, temperature control reaction for 1 hour, temperature control -60~-70℃, dropwise add 43.7g boric acid Trimethyl ester (0.41mol), and then naturally warmed to -30°C. Add 400ml of 2M hydrochloric acid aqueous solution for acidification, perform conventional post-treatment, and recrystallize from petroleum ether to obtain 78.6g of light yellow solid (compound BYLC-01-1, 0.283mol), HPLC: 99.7%, yield: 94.6%.
[0141] (2) Synthesis of compound BYLC-01-2:
[0142] Under nitrogen protection, add 78.6g compound BYLC-01-1 (0.283mol) to the reaction flask, 62....
Embodiment 2
[0155] The structural formula of the liquid crystal compound is:
[0156]
[0157] The synthetic route for preparing compound BYLC-02 is as follows:
[0158]
[0159] by replace Other reaction conditions are with embodiment 1.
[0160] The obtained white solid BYLC-02 was analyzed by GC-MS, and the m / z of the product was 454.1 (M+).
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Abstract
The invention relates to a liquid crystal vertical self-alignment additive as well as a preparation method and application thereof. The liquid crystal vertical self-alignment additive has a structureas shown in a general formula I, wherein R1 represents alkyl, alkoxy, alkenyl or alkenyloxy with 0-10 carbon atoms; a ring A represents a 1,4-phenylene group or a 1,4-cyclohexylidene group; Z1 and Z2independently represent a single bond, -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, -CH=N-, -N=CH-, -N=N-, a carbon-carbon triple bond, a C1-C12 alkylene group or a C2-C12 alkenyl; P1 and P2 independently represent an acrylate group, a methacrylate group, a fluorinated acrylate group, a chlorinated acrylate group, an ethyleneoxy group, an oxetane group or an epoxy group; L1 and L2 independently represent a hydrogen atom, a fluorine atom, or an alkyl group or alkoxy group having 1-5 carbon atoms; R2 represents an alkyl group having 0-10 carbon atoms; m represents 0 or 1; when m is equal to 0, R1 is 0; l represents 0, 1 or 2; r1 and r2 independently represent 0, 1, 2, 3 or 4; and n represents 1, 2, 3, 4 or 5.
Description
technical field [0001] The invention belongs to the technical field of liquid crystal materials, and relates to a liquid crystal vertical self-alignment additive and a preparation method and application thereof. Background technique [0002] In recent years, liquid crystal display devices have been widely used in various electronic devices such as smartphones, tablets, car navigation systems, and televisions. Representative liquid crystal display modes include twisted nematic (TN) type, super twisted nematic (STN) type, in-plane switching (IPS) type, fringe field switching (FFS) type and vertical alignment (VA) type. Among them, the VA mode has received more and more attention due to its fast fall time, high contrast, wide viewing angle and high-quality images. [0003] In conventional VA displays, after the glass substrate is made into electrodes, its surface needs to be coated with a layer of polyimide (PI) alignment film to achieve vertical alignment of liquid crystal mo...
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