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Synthesis device, application thereof and method for producing thermotropic liquid crystal polymer

A synthesis device and liquid storage tank technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve the problems affecting the final performance of liquid crystal polymers, affecting the precise molar ratio, etc., to achieve compact structure, gentle and controllable reaction , the effect of inhibiting the precipitation of monomers

Pending Publication Date: 2020-07-14
惠生(中国)投资有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of synthetic device and its application and the method for producing thermotropic liquid crystal polymer, for solving the material existing in liquid crystal polymer reaction process in the prior art Flying temperature and monomer sublimation affect the precise molar ratio of reactants and monomers, thereby affecting the final performance of liquid crystal polymers

Method used

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  • Synthesis device, application thereof and method for producing thermotropic liquid crystal polymer

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Embodiment 1

[0033] Such as figure 1 As shown, a synthesis device for liquid crystal polyester is provided in the embodiment of the present application, and the synthesis device includes a reaction kettle 1, a condenser 2 and a liquid storage tank 3;

[0034] The reaction kettle 1 is communicated with the liquid inlet of the condenser 2 through a first pipeline;

[0035] The liquid storage tank 3 communicates with the liquid outlet of the condenser 2 through a second pipeline;

[0036] The reactor 1 is provided with an agitator 11, a shower 12 and a temperature sensor; the liquid storage tank 3 communicates with the shower 12 through a third pipeline;

[0037] The third pipeline is provided with a metering pump 4 and a first temperature control switch 5; the first temperature control switch 5 is electrically connected to the temperature sensor.

[0038] In the present application, the reaction material of the reaction device is heated to a certain temperature in the reactor to maintain a...

Embodiment 2

[0061] Add p-hydroxybenzoic acid 1657.4g, 2-hydroxyl-6-naphthoic acid 752.72g, hydroquinone 220.2g, terephthalic acid 332.2g, potassium acetate 8.4g (polymerization catalyst) and p-toluenesulfonic acid in reactor Acid 11g (acetylation reaction catalyst), acetic anhydride 2500g.

[0062] After the reactants were mixed and stirred evenly, the acetylation reaction was carried out under nitrogen atmosphere at 155° C. under reflux for 2.5 h. When the monomer sublimates and precipitates on the wall of the kettle, the cooling water is opened in the cooling unit to cool down in the oil bath, and at the same time, the sprayer sprays the solvent to wash the monomer back into the reactor to continue the reaction. Subsequently, the temperature was further raised to 350°C within 5 hours, during which the reaction temperature rise rate was controlled by the cooling water flux in the cooling pipe and the shower, so that the polymerization reaction proceeded gradually and gently. As acetic a...

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Abstract

The invention provides a synthesis device, application thereof and a method for producing a thermotropic liquid crystal polymer. The synthesis device comprises a reaction kettle (1), a condenser (2) and a liquid storage tank (3), wherein the reaction kettle (1) is communicated with a liquid inlet of the condenser (2) through a first pipeline; the liquid storage tank (3) is communicated with a liquid outlet of the condenser (2) through a second pipeline; a stirrer (11), a sprayer (12) and a temperature sensor are arranged in the reaction kettle (1); the liquid storage tank (3) is communicated with the sprayer (12) through a third pipeline; a metering pump (4) and a first temperature control switch (5) are arranged on the third pipeline; and the first temperature control switch (5) is in electric signal connection with the temperature sensor. The synthesis device is compact in structure, can realize accurate control of the temperature of reaction materials in the reaction kettle, and isvery suitable for producing thermotropic liquid crystal polymers.

Description

technical field [0001] The invention relates to the field of synthesis of liquid crystal polyester, in particular to a synthesis method and a synthesis device of liquid crystal polyester. Background technique [0002] Thermotropic liquid crystal polymer (TLCP), as a special performance engineering plastic, has a series of excellent properties, such as high strength, high modulus, short molding cycle, heat resistance and chemical corrosion resistance, small linear expansion coefficient, low Hygroscopicity, low dielectric constant, excellent electrical insulation, etc. Therefore, it is currently widely used in electronic appliances, fiber optics, flexible circuit boards, 5G mobile phone antennas and other fields. [0003] The synthesis of thermotropic liquid crystal polyester by melt method usually includes the following steps: (1) acetylation reaction is carried out to the mixed monomers in the reactor; (2) after the acetylation is completed, the temperature is raised to car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/08B01J8/10C08G63/60C08G63/83
CPCB01J8/10B01J8/085B01J8/087B01J8/082C08G63/605C08G63/83B01J2219/00087Y02P20/10
Inventor 高敬民吴煜金纪阳
Owner 惠生(中国)投资有限公司
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