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Method for producing aromatic polysulfone

A manufacturing method and aromatic technology, which is applied in the field of aromatic polysulfone and aromatic polysulfone composition, can solve the problems of insufficient, unsuitable, easy-to-discolor thermal stability, etc., and achieve excellent heat resistance and low content Effect

Active Publication Date: 2019-06-14
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Conventional aromatic polysulfones having halogen atoms at the end usually contain halogen atoms in the order of thousands of ppm, so they are not suitable for this application
In addition, although the aromatic polysulfone having a phenolic hydroxyl group at the terminal has a small content of halogen atoms, it tends to discolor when heated, resulting in insufficient thermal stability.

Method used

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  • Method for producing aromatic polysulfone
  • Method for producing aromatic polysulfone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0218] Mix 353.57 g of bis(4-chlorophenyl)sulfone, 300.36 g of bis(4-hydroxyphenyl)sulfone, and 4 - 6.54 g of phenylphenol and 579.93 g of diphenylsulfone were heated up to 180° C. while nitrogen gas was flowing into the system. After adding 170.92 g of potassium carbonate to the obtained mixed solution, the temperature was gradually raised to 288° C., and the reaction was further carried out at 288° C. for 4 hours. Next, the obtained reaction mixture solution was cooled to room temperature, solidified, pulverized finely, and washed several times by decantation and filtration using hot water and a mixed solvent of acetone and methanol. The obtained solid was heated and dried at 150°C to obtain the aromatic polysulfone of Example 1.

[0219] The value of r / (p+q) calculated at this time was 1.23. In addition, p is the blending amount of the aromatic dihalogenated sulfone compound (unit: mole), q is the blending amount (unit: mole) of the aromatic dihydroxy compound, and r is t...

Embodiment 2

[0221] Set bis(4-chlorophenyl)sulfone to 352.87g, bis(4-hydroxyphenyl)sulfone to 300.36g, 4-phenylphenol to 4.90g, and diphenylsulfone to 578.96g , and except that potassium carbonate was 170.83 g, the aromatic polysulfone of Example 2 was obtained in the same manner as in Example 1.

[0222] The value of r / (p+q) calculated at this time was 1.00.

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Abstract

The method for producing an aromatic polysulfone produces an aromatic polysulfone through a polycondensation reaction between an aromatic dihalogenosulfone compound and an aromatic dihydroxy compound.The polycondensation reaction is carried out in the coexistence of at least one aromatic terminal capping agent; and if p (mol) is the blending amount of the aromatic dihalogenosulfone compound, q (mol) is the blending amount of the aromatic dihydroxy compound, and r (mol) is the blending amount of the aromatic terminal capping agent, p, q and r satisfy formula (S1) and formula (S2). r / (p-q) < 2(S1); p > q (S2).

Description

technical field [0001] The present invention relates to a method for producing aromatic polysulfone, aromatic polysulfone and aromatic polysulfone composition. [0002] This application claims priority based on Japanese Patent Application No. 2016-209245 for which it applied to Japan on October 26, 2016, and uses the content here. Background technique [0003] Aromatic polysulfone is used as a material for moldings because of its excellent heat resistance and chemical resistance. Aromatic polysulfone is generally produced by polycondensing an aromatic dihalogenated sulfone compound and an aromatic dihydroxy compound in the presence of a base and a reaction solvent (for example, Patent Document 1). That is, the aromatic polysulfone obtained by the polycondensation reaction of an aromatic dihalogenated sulfone compound and an aromatic dihydroxy compound has a halogen atom or a phenolic hydroxyl group at its terminal. [0004] In recent years, there has been an active movemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/40C08G75/20
CPCC08G75/23C08L81/06C08G65/40C08G75/20C08G65/4056C08L71/02C08K3/013C08K3/04C08K3/34C08K3/40C08K7/06C08K7/10C08K7/14
Inventor 伊藤和幸
Owner SUMITOMO CHEM CO LTD