Green high-purity polyarylether and preparation method thereof

Abstract

The invention relates to a green high-purity polyarylether and a preparation method thereof, and belongs to the field of polymer synthesis. A initial raw material of the green high-purity polyarylether is composed of the following components in parts by weight: 56 to 324 parts of a diphenol compound or a sulfide, 114 to 577 parts of a dihalogenated aromatic compound, 400 to 5000 parts of a solvent, 0.1 to 300 parts of an auxiliary agent, 500 to 5000 parts of a supercritical extraction agent and 300 to 3000 parts of an auxiliary agent leaching agent; the green high-purity polyarylether is prepared by the following preparation method: 1) carrying out dehydration reaction; 2) recovering the solvent for the first time through high-temperature filtration or high-temperature closed flash evaporation; 3) carrying out supercritical extraction to recovery the solvent; and 4) carrying out auxiliary agent recovery and separation. The purity of the obtained polyarylether is more than or equal to 99.9%, the whiteness is more than or equal to 75, the impurity content is less than or equal to 20 ppm, the complete recycling of the solvent and the auxiliary agent is achieved in the whole preparation process, and the method is green and environmentally friendly.

Description

technical field [0001] The invention relates to a green, high-purity polyarylether and a preparation method thereof, belonging to the field of polymer synthesis. Background technique [0002] Polyarylene ether mainly includes polyarylene sulfide such as polyphenylene sulfide, polyphenylene sulfide ester, polyphenylene sulfide ketone, polyphenylene sulfide sulfone, polyphenylene sulfide amide, polyphenylene ether sulfide, polyphenylene sulfide acyl Imine; polyphenylene oxide, polyether sulfone, polyether ketone, polyether ether ketone, polyether ether ketone ketone, polyaryletheramide, polyaryletherimide, due to its corrosion resistance, high temperature and excellent electrical properties, Mechanical properties and dimensional stability are widely used in aerospace and electronic technology. Among them, the main production method of polyarylether is: using auxiliary agent, nucleophile (such as diphenol compound or sulfide), dihalogenated aromatic compound and polar solvent ...

AI Technical Summary

Problems solved by technology

Among them, the main production method of polyarylether is: using auxiliary agent, nucleophile (such as diphenol compound or sulfide), dihalogenated aromatic compound and polar solvent as raw materials, carrying out solution polycondensation, and reacting the reaction mixture For solid-liquid separation, the crude resin product is purified by water washing, the process is long, and the water consumption in this process is large, and the subsequent solvent is generally recovered by distillation and separation, resulting in high energy consumption in the subsequent solvent recovery process , and the purity of the recovered solvent is not high; the solvent wrapped in the resin has high volatile content, and the resin is impure, which will make the resin processed into products dark in color, produce cells or defects, and affect the overall performance of the final product; in addition, the The separation and recovery of the auxiliary agents involved are also carried out in aqueous solution, which makes the recovery process high energy consumption and low purity, and generally requires chemical precipitation to recover and separate, and then perform an additional second step of reaction to obtain the final reaction The required additives are long in the whole process and require a lot of equipment investment; in addition, due to the high solubility of the additives in water, the recovery rate of the overall additives is low, which in turn leads to high production costs of polyarylether products for a long time; more importantly The most important thing is that its waste water and waste residue are often not easy to be completely separated, unable to be recycled, and difficult to large-scale and stable industrial production

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