Synthesis method of polysulfone resin

The technology of a polysulfone resin and a synthesis method, which is applied in the field of polysulfone resin synthesis, can solve the problems of waste of raw materials, long reaction time and the like, and achieve the effects of wide application, saving raw materials and reducing costs.

Inactive Publication Date: 2014-03-05
WEIHAI JIERUI MEDICAL PRODUCTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the method of controlling the molar ratio of raw materials to prepare polysulfone resins with different molecular weights and different flow properties and uses, the reaction time is relatively long, and the raw materials are wasted to a certain extent.

Method used

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  • Synthesis method of polysulfone resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 0.5 mol of 4,4-dichlorodiphenyl sulfone, 0.5 mol of bisphenol A, 525.3 g of N-methylpyrrolidone, 22 g of NaOH and 52.5 g of chlorobenzene into a four-necked flask equipped with a condensing water separator and a thermometer. Stir and heat up under protection to dissolve all the added substances and raise the temperature to 95°C~105°C, the reaction system starts to azeotrope, the water generated by the reaction is continuously evaporated, and the chlorobenzene is refluxed into the reaction flask. During the reaction process, N-methylpyrrolidone was continuously added dropwise to replace the steamed water to maintain the liquid level balance. After all the water in the reaction system was azeotropically taken out, the reflux was continued for 30 minutes to steam out the chlorobenzene. The temperature was raised to 220°C, and after continuing the reaction for 6 hours, cold N-methylpyrrolidone was added to control the system temperature at 165°C-185°C. Flush into the re...

Embodiment 2

[0016] Example 2: After the temperature was raised to 220° C., the reaction was continued for 7 hours. Other operations are the same as in Example 1.

Embodiment 3

[0017] Example 3: After the temperature was raised to 220° C., the reaction was continued for 8 hours. Other operations are the same as in Example 1.

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Abstract

The invention relates to a synthesis method of polysulfone resin. The method mainly comprises the following step: with bisphenol A and 4,4-dichlorodiphenylsulfone, of which the molar ratio is 1:1, as raw materials, N-methylpyrrolidone as a solvent used in the reaction process, chlorobenzene as a dehydrating agent and NaOH as a salt-forming agent, blocking by a chloromethane gas, wherein the overall reaction process is carried out under protection of nitrogen. The solid content of the system is controlled at 25-40%; chlorobenzene is 10-20% of weight of the solvent; the molar weight of NaOH is 1.01-1.10 times of that of the bisphenol A. The synthesis method is reasonable in formula, and simple to operate. The chloromethane gas is adopted to block, so as to prepare polysulfone resin with good liquidity by controlling the reaction time. By adopting the synthesis method, the reaction time can be shortened, a part of raw materials are saved, the production cycle can be shortened on production, and the cost is also reduced.

Description

technical field [0001] The invention relates to a method for synthesizing polymer materials, in particular to a method for synthesizing polysulfone resin. Background technique [0002] The molecular structure unit of polysulfone resin is [0003] [0004] The two oxygen atoms on the sulfone group of the molecular chain are symmetrical and non-polar, and the sulfur atom on the main chain is in the highest oxidation state, which makes the thermal oxygen stability of the polysulfone resin higher; moreover, the sulfone group forms with two adjacent benzene rings. The highly conjugated diphenyl sulfone structure makes polysulfone have excellent properties such as high strength and high rigidity. In addition, polysulfone resin can still maintain good mechanical properties at high temperatures, and is resistant to hydrolysis and has good dimensional stability. Polysulfone can be formed by injection, extrusion, blow molding and coating, and has a wide range of applications in e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/40
Inventor 李忠志王霁王洪杰
Owner WEIHAI JIERUI MEDICAL PRODUCTS CO LTD
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