Industrial synthesis method of poly(aromatic ether sulfone) resin with high solid content

Abstract

The invention discloses an industrial synthesis method of a poly(aromatic ether sulfone) resin with a high solid content. The synthesis method comprises the following steps: taking 4,4'-dichlorodiphenyl sulfone and 4,4'-biphenol or 4,4'-dihydroxyl diphenyl sulfone as the reaction monomers, sulfolane as the solvent, and sodium carbonate as the salt forming agent, adding the solvent into a reactor filled with nitrogen gas, then stirring, heating to a temperature of 60 to 80 DEG C, orderly adding the reaction monomers, fully dissolving the monomers, adding the salt forming agent into the reactor, then adding a water separating agent, keeping on stirring, heating to a temperature of 200 to 210 DEG C, carrying out salt forming reactions for 1 to 2 hours; completely evaporating the water separating agent after the salt forming reactions, then transporting the salt forming reaction products to a polymerization reactor to carry out reactions; wherein the solid content of the system in the salt forming phase is 20% to 25%, and the solid content of the system in the polymerization phase is 35% to 45%; cooling the polymerization sticky liquid after the polymerization reactions, grinding into powder, filtering, then boiling and washing with deionized water to remove the solvent and byproduct namely the salt, and finally drying so as to obtain the target product. The synthesis technology can reduce the using amount of solvent sulfolane, shortens the polymerization time, and increases the output.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an industrial synthesis method of polyaryl ether sulfone resin with high solid content. Background technique [0002] Polyarylethersulfone is a high-performance engineering plastic, including polyethersulfone (PES) and biphenyl polyethersulfone (PPSU), both of which have a high glass transition temperature (~220°C), due to their heat-resistant Sex, hot water resistance, creep resistance, dimensional stability, impact resistance, chemical resistance, non-toxic, flame retardant and other excellent comprehensive properties, so for a long time in electronics, electrical appliances, machinery, automobiles, medical appliances, It is widely used in food processing and non-stick coatings. [0003] The industrially important polyarylethersulfone has a production process using diphenyl sulfone as a solvent, such as European patent document EP2008067700 and US patent...

AI Technical Summary

Problems solved by technology

These two processes have the following defects: (1) The production capacity of polyaryl ether sulfone is low under the same equipment conditions; (2) Due to the instability of sulfolane at high temperature, the recovery rate of sulfolane in the whole process is only 80% About, that is to say, every ton of polyarylether sulfone will lose 600.00KG sulfolane

Chinese patent document CN1268526A discloses a method of adding a viscosity regulator organosilicon compound to the system to increase the solid content to 40-45%, but additional organosilicon needs to be added to increase the difficulty of post-processing, and the polymerization cycle is also longer

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