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Continuous nylon polymerization method

A polymerization method, nylon technology, applied in the field of engineering plastics, can solve the problems of high energy consumption and low melt polymerization efficiency of nylon salt process, and achieve the effect of being environmentally friendly and reducing heat release

Active Publication Date: 2021-02-23
CHENGDU 401 TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Aiming at the technical problems of high energy consumption and low melt polymerization efficiency in the existing nylon salt process, the present invention provides a continuous nylon polymerization method, that is, a certain amount of polyamide resin is added to the raw material system as a reactive dispersion medium, so that each group The components can be uniformly and stably dispersed in the dispersion medium, so as to ensure the uniformity of the subsequent polymerization reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A continuous nylon polymerization method, the polymerization raw materials include 5-60 parts of dibasic acids and / or dibasic acid esters of polymerized monomers, 3-50 parts of diamines, and 10-90 parts of reactive dispersion medium polyamides in terms of mass. The polymerization step includes continuously adding the polymerization raw materials in proportion to the material mixing device, so that the raw materials are mixed and reacted in the material mixing device to form a continuously transported melt, and the uniformly dispersed melt is reacted in the follow-up polymerization device until the nylon polymerization reaches the desired level. required molecular weight.

Embodiment 2

[0062] A continuous nylon polymerization method, comprising 60 parts of polymerized monomer dibasic acid and dibasic acid ester, 50 parts of diamine and 90 parts of reactive dispersion medium polyamide; raw materials are proportionally measured by weight or volume Continuously feed into the tubular reaction device to make the polymerized monomer react and mix evenly in the molten reactive amide dispersion medium. After the material is mixed evenly, it enters the subsequent polymerization device to polymerize until the nylon resin reaches the required molecular weight.

[0063] The temperature of the material mixing process can satisfy the melting of the raw material polyamide.

[0064] The dibasic acid and / or dibasic ester raw material has a lower melting point than the polyamide raw material.

[0065] First, different polymer monomers are reacted with molten raw material polyamide and mixed uniformly to form melts, and then various melts are continuously fed into the material...

Embodiment 3

[0070] A continuous nylon polymerization method, the polymerization raw materials, by mass, include 50 parts of polymeric monomer dibasic acid esters, 40 parts of diamines and 10 parts of reactive dispersion medium polyamides; the raw materials are measured by weight or volume Continuously feed into the screw extrusion device in proportion, so that the polymerized monomers react and mix evenly in the molten reactive amide dispersion medium. After the materials are mixed evenly, they enter the subsequent polymerization device to polymerize until the nylon resin reaches the required molecular weight.

[0071] First, the raw material dibasic acid and the melted raw material polyamide are reacted and mixed evenly, and then the diamine is continuously added to it, and reacted and mixed evenly in the material mixing device.

[0072] The diamine is melted into a liquid state or dissolved in a solvent and fed into the screw extrusion device in a liquid state.

[0073] The molar ratio ...

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Abstract

The invention provides a continuous nylon polymerization method which comprises the following polymerization raw materials in parts by mass: 5-60 parts of polymerization monomer dibasic acid and / or dibasic acid ester, 3-50 parts of diamine and 10-90 parts of reactive dispersion medium polyamide. The polymerization step comprises the following steps: continuously adding the polymerization raw materials into a material mixing device in proportion, mixing and reacting the raw materials in the material mixing device to form a continuously conveyed melt, and reacting the uniformly dispersed melt ina subsequent polymerization device until the nylon is polymerized to reach the required molecular weight. The method is an efficient, green and environment-friendly nylon polymerization method.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a continuous nylon polymerization method. Background technique [0002] Nylon has comprehensive advantages in terms of mechanical properties, durability, corrosion resistance, heat resistance and cost, and is widely used in various fields such as electronics, machinery, fiber, and automobiles. Due to the pursuit of lightweight and environmental protection in various industries, replacing steel and wood with plastic has become a major trend in design and material selection. Nylon is one of the fastest growing parts of the plastics industry today, and the improvement of its production process has always been a research hotspot. [0003] At present, the most commonly used nylon polymerization methods include nylon salt process and melt polymerization process. The nylon salt process generally first prepares nylon salt in water or a strong polar organic solvent, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/28C08G69/26
CPCC08G69/28C08G69/26Y02W30/62
Inventor 李洋
Owner CHENGDU 401 TECH CO LTD
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