High-performance polysulfone resin and synthesis thereof

Abstract

The invention provides a preparation method of high-performance polysulfone resin. The preparation method includes adding 45-55 parts of 4,4-dichlorodiphenylsulfone, 35-40 parts of salt-forming agent, 80-100 parts of low boiling point organic solvent and 0.01-0.04 parts of 3-fluoro-4-chlorobenzophenone into the reactor, and then 20-60 parts of 4,4'- -dihydroxydiphenylsulfone or bisphenol, injecting nitrogen gas and heating until the temperature inside the reactor rises to 200-210 DEG C, maintaining reaction at constant temperature for 1 to 2 hours, and after the temperature rises to 240-260 DEG C for 4 to 7 hours, adding 0.09-0.16 parts of 3-fluoro-4-chloro benzophenone, reacting 10-20 minutes, then stopping reactor and treating the reactant to obtain high-performance polysulfone resin. The polysulfone resin prepared by the method has high molecular weight, good transparency and heat resistance.

Description

technical field [0001] The invention belongs to the field of polysulfone resin synthesis, and in particular relates to a high-performance polysulfone resin and its synthesis. Background technique [0002] Polysulfone is a kind of high-performance engineering plastics. Because of their excellent comprehensive properties such as heat resistance, hot water resistance, creep resistance, dimensional stability, impact resistance, chemical resistance, non-toxicity and flame retardancy, Therefore, it has been widely used in the fields of electronics, electrical appliances, machinery, automobiles, medical appliances, food processing and non-stick coatings for a long time. At present, the performance of polysulfone resin prepared by normal pressure synthesis method is poor in all aspects, so the high pressure synthesis method of polysulfone is gradually paid attention to and applied in industry, but the technology of synthesizing polysulfone under high pressure is not mature, related ...

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Problems solved by technology

At present, the performance of polysulfone resin prepared by normal pressure synthesis method is poor in all aspects, so the high pressure synthesis method of polysulfone is gradually paid attention to and applied in industry, but the technology of synthesizing polysulfone under high pressure is not mature, related research reports There are not many, so the industrial synthesis of polysulfone with various properties and uses by high pressure method is of great significance for the promotion of the practical application of polysulfone

[0003] CN103254421A discloses the synthesis of aromatic polysulfone by high-pressure method. This preparation method can synthesize more kinds of aromatic polysulfone and expand the range of reactant selection. However, the polysulfone resin prepared by it has a high yellowness index and low transparency. its application in some respects

[0004] CN104530419A discloses an industrial synthesis method of high thermal stability capped polysulfone resin, through high-pressure polymerization, using 4,4-dichlorodiphenyl sulfone and bisphenol A as reaction monomers, adding 3,4'-difluoro One or a combination of benzophenone, 3-chloro-4-fluorobenzophenone, 3-fluoro-4-chlorobenzophenone or 3,4'-dichlorobenzophenone as end-capping agent, but in its technical scheme, the end-capping agent is added to end-capping in the late stage of polymerization reaction. Although the prepared polysulfone resin has good thermal stability, the transparency cannot be improved well, and the reaction raw material uses bisphenol A, but the bisphenol A contained in the resin may cause harm to the human body, thus limiting the application of the resin

[0005] CN104530431A discloses an industrial synthesis method of polysulfone resin with low color and high light transmittance, using 4,4-dichlorodiphenyl sulfone and bisphenol A as reaction monomers, using low-boiling point organic matter as solvent, and using sodium carbonate as Salt forming agent, 3,4'-difluorobenzophenone, 3-chloro-4-fluorobenzophenone, 3-fluoro-4-chlorobenzophenone or 3,4'-dichlorodiphenyl One or several kinds of ketones are mixed as end-capping agents to prepare polysulfone resins with better light transmittance, but the end-capping agents and the reaction raw materials are added together for reaction, so that the obtained resin has a lower molecular weight and is heat-resistant. Relatively poor stability, etc., and bisphenol A is also used as the raw material for the reaction. The bisphenol A contained in the resin may cause harm to the human body, thus limiting the application of the resin

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