Synthesis-auxiliary-free polyphenylene sulfide resin industrial synthetic process

Abstract

The invention discloses a synthesis-auxiliary-free polyphenylene sulfide resin industrial synthetic process. The formula of raw materials required in the synthesis-auxiliary-free polyphenylene sulfide resin industrial synthetic process is as follows: the mole ratio of sodium sulfide to sodium hydroxide to santochlor to N-methylpyrrolidinone is 0.98-1.18 to 0.01-0.30 to 1.00-1.28 to 2.30 to 3.80. The industrial synthetic process comprises the following steps: firstly, a pipeline filter is adopted to filtrate a sodium sulfide solution and a sodium hydroxide solution to treat the mechanical impurities in the solutions; secondly, a sodium hydroxide solution with the concentration of 60 mol percent is added in the formula for chemical treatment on the sodium sulfide solution; thirdly, in a condensation polymerization stage, 0.01-0.03 mol of sodium sulfide and 0.01-0.03 mol of dichlorobenzene are added to adjust the molecular weight and molecular weight distribution coefficient and adjust the content of covalent chlorine below 120 ppm, and finally the target product of the synthesis-auxiliary-free polyphenylene sulfide resin industrial synthetic process is obtained. According to the synthesis-auxiliary-free polyphenylene sulfide resin industrial synthetic process provided by the invention, the halogen in the obtained product is low in total content and polydispersity index, molecular weight distribution is narrow and oxygen index is high, the electrical insulation property is excellent, and the product adopted through the process can be used as packaging materials of electronic devices as well as industrial and civilian products, and particularly clad 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 mo...

AI Technical Summary

Problems solved by technology

[0005] As far as the development of the existing polyphenylene sulfide synthesis technology is concerned, the synthesis of polyphenylene sulfide resin without adding any synthetic additives is the future of polyphenylene sulfide synthesis technology The development direction is generally to use sodium sulfide, sodium hydroxide and p-dichlorobenzene (P-DCB) as raw materials, although the American Phillips company and Japan's polyphenylene sulfide resin production company without any synthetic additives produce The polyphenylene sulfide resin without adding any synthetic additives basically does not change much in raw materials, but realizes the synthesis of polyphenylene sulfide resin without adding any synthetic additives through synthetic process control means, and at the same time adds a certain amount of raw materials for vulcanization Sodium is used to treat the synthetic polyphenylene sulfide resin, which is to achieve the purpose of low chlorine in the synthetic polyphenylene sulfide resin. See other specific process introductions for industrial synthesis using only sodium sulfide and sodium hydroxide

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