A kind of industrial synthesis process of polyphenylene sulfide resin without adding any synthetic auxiliary agent

Abstract

The invention discloses an industrial synthesis process of polyphenylene sulfide resin without adding any synthetic auxiliary agent. The formula of raw materials is as follows, the molar ratio of sodium sulfide: sodium hydroxide: p-dichlorobenzene: N-methylpyrrolidone is 0.98- 1.18: 0.10~0.30: 1.00~1.28: 2.30~3.80; first use pipeline filter to filter sodium sulfide and sodium hydroxide solution to deal with the mechanical impurities in it, then add 60%mol sodium hydroxide in the formula to filter sodium sulfide Chemical treatment: In the polycondensation stage, add 0.01-0.03mol sodium sulfide / mol p-dichlorobenzene to adjust the molecular weight and molecular weight distribution coefficient, so that the content of covalent chlorine is adjusted to below 120ppm, and finally the target product of the present invention is obtained. The total content of halogen elements and the polydispersity coefficient in the product obtained in the present invention are low, and the molecular weight distribution is narrow and the oxygen index is high. Coating materials for wires and cables.

Description

technical field [0001] The invention belongs to the field of polymer material resin synthesis, especially the production of polyphenylene sulfide resin without adding any synthesis auxiliary agent. Background technique [0002] High-performance polyphenylene sulfide has excellent chemical resistance and thermal stability at high temperatures, and has flame retardancy, insulation, radiation resistance and good mechanical properties. In order to explore the synthesis method of this material, researchers from all over the world have been working hard to find it. [0003] In U.S. Patent No: 4761468, it is described that chemical substances such as mercapto and mercapto metal salts are used to synthesize polyphenylene sulfide resins. After the synthesis, the polyphenylene sulfide resins are treated to reduce the content of chlorine in the polyphenylene sulfide resins. In the future, the polyphenylene sulfide resin will be applied to the field of electronic components through mod...

AI Technical Summary

Problems solved by technology

[0005] As far as the development of existing polyphenylene sulfide synthesis technology is concerned, the synthesis of polyphenylene sulfide resin without any synthetic additives is the development direction of polyphenylene sulfide synthesis technology in the future. Generally, sodium sulfide and sodium hydroxide are used Chlorobenzene (P-DCB) is used as a raw material, although the polyphenylene sulfide resin produced by the American Phillips company and the Japanese polyphenylene sulfide resin production company without any synthetic additives is basically not used in How much is changed in raw materials, but the synthesis of polyphenylene sulfide resin without adding any synthetic additives is realized through synthetic process control means, and a certain amount of raw material sodium sulfide is added to process the synthesized polyphenylene sulfide resin, which is a synthetic polyphenylene sulfide resin. Phenyl sulfide resin achieves the purpose of low chlorine. Although the United States and Japan currently use no additives to synthesize polyphenylene sulfide resin, there are no other specific industrial synthesis processes that only use sodium sulfide and sodium hydroxide. introduce

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