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Solvent-free preparation method of polymer microspheres

A solvent-free, polymer-free technology, applied in the field of solvent-free preparation of polymer microspheres, achieves the effects of simplified preparation process, fast polymerization rate and uniform particle size

Pending Publication Date: 2022-01-18
南京极速优源感光材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problem of using solvent or water in the process of preparing polymer microspheres by conventional methods so that the subsequent microspheres need to be post-treated, a solvent-free preparation method for polymer microspheres is provided.

Method used

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  • Solvent-free preparation method of polymer microspheres

Examples

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Embodiment 1

[0044] A solvent-free preparation method of polymer microspheres, using figure 1 The reaction apparatus shown in the polymerization reaction, figure 1 The device shown in is a reaction device using photopolymerization, and the specific structure is:

[0045] Comprising a mixing unit 2, a feed pump 3, a first pipeline 4, a gas input control unit, a second pipeline 5, a dispersion unit 6, a microchannel reactor polymerization unit 7 and a product collection tank 10; the gas input control The unit includes a gas tank 1 and a gas flow control meter 9; the microchannel reactor polymerization unit 7 is a microchannel reactor, and the microchannel reactor adopts a transparent quartz glass pipeline with a photoinitiating source 8 above the microchannel reactor ;

[0046] The mixing unit 2 is connected to the feed pump 3, the feed pump 3 is connected to the dispersing unit 6 through a first pipeline 4, and a gas inlet is also provided on the dispersing unit 6, the The gas inlet is c...

Embodiment 2

[0053] A solvent-free preparation method of polymer microspheres, using figure 2 The reaction apparatus shown in the polymerization reaction, figure 2 The device shown in is a reaction device using photopolymerization, and the specific structure is the same as that of Example 1, except that the gas in the second pipeline 5 in this embodiment is carried out horizontally with the polymerization system in the dispersion unit 6. Convergence defines that the gas at this time performs impact movement on the polymerization system.

Embodiment 3

[0055] A solvent-free preparation method of polymer microspheres, using image 3 The reaction apparatus shown in the polymerization reaction, image 3 The device shown in is a reaction device that adopts thermal polymerization. The difference between the specific structure and the device in Example 1 is that the microchannel reactor polymerization unit 7 adopts thermal polymerization, and all pipelines are made of stainless steel. The microchannel reactor The microchannel pipeline in the polymerization unit 7, the first pipeline 4, and the second pipeline 5 are all made of stainless steel, and a temperature control element 11 is arranged outside the pipeline;

[0056] Wherein, the diameter of the microchannel of the polymerization unit 7 of the microchannel reactor is 1-5 mm, and the length is 20-100 m.

[0057] In addition, in some embodiments, the above-mentioned pipe made of stainless steel is also wrapped with an insulating layer.

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Abstract

The invention relates to a solvent-free preparation method of polymer microspheres. The method comprises the following step of: uniformly dispersing a continuously introduced solvent-free polymerization system in a container under the impact or cutting of continuously input gas, and at the same time, under the flow of the gas, and driving the dispersed polymerization system to enter a micro-channel reactor to carry out polymerization reaction so as to prepare the polymer microspheres. The method provided by the invention can realize solvent-free preparation of the polymer microspheres; the prepared microspheres are colorless and transparent, smooth and clean in surface, uniform in particle size; and the method is free of post-treatment and suitable for preparation of most polymer microspheres. According to the method, the wall sticking phenomenon of the polymerization system is avoided, and the polymer microspheres are prepared through rapid polymerization by means of photopolymerization or thermal polymerization.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a solvent-free preparation method of polymer microspheres. Background technique [0002] At present, the main preparation methods of polymer microspheres include emulsion polymerization, suspension polymerization, precipitation polymerization and dispersion polymerization. By adopting different preparation methods and controlling the reaction conditions, polymer microspheres with different characteristics such as particle size and dispersion can be prepared to meet different application requirements. [0003] The solution polymerization method is to prepare a stable emulsion from the monomer, dispersion medium, initiator and emulsifier, and the polymerization occurs inside the latex particles. Its advantages include low viscosity of the reaction system, fast heat dissipation, high reaction rate, high molecular weight of the product, and narrow particle size distributio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J19/00
CPCB01J13/02B01J19/0093B01J2219/00889B01J2219/00891B01J2219/00936B01J2219/00961B01J2219/00975
Inventor 李三保聂俊朱晓群周嘉敏刘瑶
Owner 南京极速优源感光材料研究院有限公司
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