Preparing method for polyethylene sulfone resin

A technology of polyphenylsulfone and resin, applied in the field of preparation of polyphenylsulfone resin, can solve the problems of low level, discontinuous process flow, unclean polymer product purity, etc., to overcome the low ash content and ensure the purity and performance. , the effect of high purity

Active Publication Date: 2016-05-25
湖南国圆新材料科技有限公司
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Problems solved by technology

[0004] In view of the above-mentioned defects, the present invention provides a preparation method of polyphenylsulfone resin, which overcomes the problem of discontinuous process flow caused by the need for pulverization of products in the production process of existing polyphenylsulfone resin, and also overcomes the problem of discontinuity in the traditional process. The inorganic salt particles wrapped in the product particles are not cleaned cleanly, which leads to the problem of low purity of the polymer product. It provides a new product precipitation and purification method for the field of amorphous polymer production, and simplifies the production process.

Method used

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  • Preparing method for polyethylene sulfone resin

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preparation example Construction

[0020] The invention provides a preparation method of polyphenylsulfone resin, including polymerization reaction and precipitation and purification treatment of reaction product, wherein:

[0021] The raw materials for the polymerization reaction and their molar ratios are: 4,4'-dichlorodiphenyl sulfone: biphenol: catalyst: sulfolane: dehydrating agent = 1: 1: 1.09~1.2: 5.7~6.2: 1.1~1.2;

[0022] The precipitation treatment of the reaction product is as follows: after the polymerization reaction is completed, the reaction temperature is lowered to 100-120°C (preferably 110°C), and at the same time, sulfolane is added to the reactor to dilute the raw material. The sum of the mass of sulfolane is 4 to 5 times of the sum of the mass of raw material 4,4'-dichlorodiphenyl sulfone and biphenol; Add 8-12% (preferably 10%) of the total mass of sulfolane, and the dropping time is 40-60 minutes. After the precipitation liquid is added, continue stirring for 30-60 minutes to obtain a com...

Embodiment 1

[0040] Taking a 200L polymerization kettle as an example, prepare raw materials according to the following quality: 4,4'-dichlorodiphenylsulfone (16.08Kg), biphenol (10.43Kg), potassium carbonate (8.5Kg), sulfolane (40Kg), Trimethylbenzene (7.95Kg).

[0041] Accurately weigh the above formula components respectively, add sulfolane and 4,4'-dichlorodiphenyl sulfone into a 200L polymerization kettle equipped with a water separator, agitator (frame-type paddle-type two-way stirring) and a heating device, Biphenyldiphenol, trimethylbenzene, inert gas nitrogen protection, start stirring (frame stirring 30r / min, paddle stirring 60r / min), the jacket of the reactor is heated to 120°C, stirring for 40 minutes until the raw materials are completely dissolved Potassium carbonate was added, and the temperature of the jacket of the polymerization kettle was raised to 200°C for reflux reaction for 2.5 hours, and trimethylbenzene and generated water were released from the water separator, an...

Embodiment 2

[0047] Referring to Example 1 for the specific method, the difference from the example is only that the reflux reaction time is extended for 30 minutes, and the polymerization reaction time is extended for 30 minutes; the properties of the obtained polyphenylsulfone resin are shown in Table 1.

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Abstract

The invention belongs to the technical field of high polymer materials and particularly relates to a preparing method for polyethylene sulfone resin. The preparing method for polyethylene sulfone resin comprises the steps that a polymerization reaction is carried out, and precipitation treatment and purification treatment are carried out on a reaction product, wherein the method of dripping a precipitation solution is adopted in precipitation treatment, the precipitation solution is a mixture prepared from deionized water and polyethylene sulfone at 1:1 by the mass ratio, the precipitation solution accounts for 8-12% of the total mass of added polyethylene sulfone, the dripping time ranges from 40 min to 60 min, stirring continues to be carried out for 30-60 min after the precipitation solution is added, and completely precipitated white polyethylene sulfone paste can be obtained; polyethylene sulfone resin is obtained by carrying out purification treatment on the white paste. According to the method, the problem that the technological process is inconsecutive due to the fact that products need to be smashed in the existing production process of polyethylene sulfone resin is solved, and meanwhile the problem that the purity of high polymer products is not high due to the fact that inorganic salt particles wrapped by product particles cannot be thoroughly removed by washing in the traditional technology is also solved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a preparation method of polyphenylsulfone resin. Background technique [0002] Polyphenylsulfone (PPSU) resin, also known as polyphenylene sulfone resin, has excellent comprehensive performance as one of the non-crystalline special engineering plastics, but the solvent recovery and product Purification treatment is quite difficult because the whole material system appears viscous due to the good solubility of the product in the solvent after the polyphenylsulfone resin polymerization reaction is completed. After the synthesis reaction, most manufacturers often use the method of gradually releasing the product from the polymerization tank to cool and then pulverize it. After pulverization, powder is obtained for subsequent recovery of solvents and by-product salts. For example, the patent with the publication number CN102924719B adopts this method, which discloses a met...

Claims

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Application Information

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IPC IPC(8): C08G75/20
CPCC08G75/20
Inventor 钟家春曲忠先
Owner 湖南国圆新材料科技有限公司
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