Preparation method of polyethersulfone resin

A technology of polyethersulfone resin and sulfolane, which is applied in the field of polyethersulfone resin synthesis, can solve problems such as difficult automatic operation, wide molecular weight distribution of products, and large on-site pollution, so as to overcome discontinuous process flow, ensure purity and performance, Overcome the effect of unclean cleaning

Inactive Publication Date: 2016-01-20
中昊黑元化工研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a production process has the following disadvantages: one is that it is difficult to operate automatically, the site is polluted, and the product in the polymerization tank is likely to remain and affect the next batch production; the other is that the particle size of the powder obtained after crushing is difficult to be uniform, and the catalyst and by-products used for synthesis are still Partially wrapped in the polymer, it is difficult to purify, resulting in low product purity, which limits the application range of the resin; third, mechanical crushing will inevitably destroy the integrity of the molecular chain, resulting in a decrease in

Method used

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  • Preparation method of polyethersulfone resin
  • Preparation method of polyethersulfone resin
  • Preparation method of polyethersulfone resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Taking a 100L polymerization kettle as an example, prepare raw materials according to the following quality: 4,4-dichlorodiphenyl sulfone (13.04Kg), bisphenol S (5.22Kg), potassium carbonate (4.3Kg), sulfolane (20Kg), trimethylbenzene (4Kg).

[0024] Accurately weigh the above formula components respectively, add sulfolane, 4,4-dichlorodiphenyl sulfone, bis Phenol S, trimethylbenzene, inert gas and nitrogen protection, start stirring, frame stirring 30r / min, paddle stirring 60r / min, heat the reactor jacket to 120°C, stir for 40 minutes until all raw materials are dissolved, then add potassium carbonate , 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, and the jacket temperature of the polymerization kettle was raised to 230° C. and the polymerization reaction was completed for 3 hours.

[0025] After the polymerization rea...

Embodiment 2

[0030] Referring to Example 1 for the specific method, the difference from Example 1 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.

Embodiment 3

[0032] Referring to Example 1 for the specific method, the difference from Example 1 is only that the reflux reaction time is shortened by 30 minutes, and the polymerization reaction time is shortened by 30 minutes; the properties of the obtained polyphenylsulfone resin are shown in Table 1.

[0033] Table 1 Polyethersulfone resin properties

[0034]

[0035]

[0036] It can be seen from the above examples that with the appropriate extension of the reflux reaction and polymerization reaction time, the molecular weight of the polyphenylsulfone resin increases, which increases its mechanical properties, and the purification effect of the same post-treatment method decreases slightly. Reaction time and polymerization reaction time, although the mechanical properties are slightly reduced, but the precipitation effect is better and the purification effect is increased.

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Abstract

The invention relates to a preparation method of polyethersulfone resin. The method comprises the steps of polymer synthesis, precipitation and purification, bisphenol S and 4,4-dichlorodiphenylsulfone are adopted as raw materials, sulfolane is adopted as a solvent, trimethylbenzene is adopted as a desiccant, K2CO3 is adopted as a catalyst, and the whole reaction process is carried out under the protection of an inert gas. The polyethersulfone resin naturally precipitates in a precipitation solution to make a material become a powdery slurry, so the material conveying and next step purification treatment are facilitated, thereby the problems of difficult product purification and difficult solvent recovery are solved, high molecular chains of the polyethersulfone resin are not destroyed, and the purity and the performances of the above product are guaranteed. The polyethersulfone resin prepared by adopting the preparation method has high purity and stable performances, can be applied in fields of foods, electrons, machines, medical treatment and chemical engineering, and solves the problem of low quality of the product due to high content and difficult removal of impurities in products prepared through traditional methods.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a synthesis method of polyethersulfone resin. Background technique [0002] Polyethersulfone (PES) is an amber transparent non-crystalline resin with excellent comprehensive properties such as heat resistance, flame retardancy, chemical stability, and dimensional stability, and has good stress crack resistance. Its temperature at 180 ° C Creep resistance is the highest among thermoplastic resins. The structural formula of polyethersulfone resin is: [0003] [0004] There are rigid benzene rings and flexible ether groups in the molecular chain, and the sulfone group forms a large conjugated system with the entire structural unit. Due to these characteristics, polyethersulfone has high strength, high temperature resistance, radiation resistance, acid resistance, and Oxidation and other advantages, and has excellent characteristics of biocompatibility. Polyethersulf...

Claims

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Application Information

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IPC IPC(8): C08G75/23
Inventor 钟家春王家贵聂绪建何平林幽静
Owner 中昊黑元化工研究设计院有限公司
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