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Preparation method of polysulfone resin material with low cyclic dimer content

A technology of cyclic dimer and resin material, applied in the field of preparation of polysulfone resin material, can solve the problems of lack of elasticity, brittle membrane filament, clogging of the filter head of spinning equipment, etc., and achieves low production cost, stable performance, high purity effect

Active Publication Date: 2020-06-09
FUHAI (DONGYING) ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the ring dimer will slowly crystallize in the polysulfone casting solution, and the crystals will block the filter head of the spinning equipment, which will seriously affect the film-forming performance of the polysulfone material, and then the film will become brittle, easy to break, and lack elasticity.

Method used

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  • Preparation method of polysulfone resin material with low cyclic dimer content
  • Preparation method of polysulfone resin material with low cyclic dimer content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 4.3kg of 4,4'-dichlorodiphenylsulfone, 6.6kg of bisphenol A, 5.2kg of potassium carbonate, 35kg of solvent N,N-dimethylacetamide (DMAC), and 15kg of xylene into a 100L polymerization reactor. After evacuating the kettle to ≤-0.08MPa, feed nitrogen to make the pressure in the kettle reach ≥0.00MPa. After nitrogen replacement three times, feed nitrogen to normal pressure reaction. The whole polymerization reaction is carried out under nitrogen protection, with water at 150°C for 2 hours, during which the The total mass of end-capping agent bisphenol S and p-cresol is 42g (the mass ratio of the two is 1:1) and 4.6kg of 4,4'-dichlorodiphenyl sulfone are dissolved in 35kg of N,N-dimethyl ethyl In the amide, add it into the reaction kettle at a uniform speed.

[0037] After all the xylene was evaporated, the temperature was raised to 162°C, and the polymerization was continued for 10h. The solid content rate is maintained at 22-30%, and the reaction ends when the viscosi...

Embodiment 2

[0042] Add 35kg of sulfolane, 7.2kg of bisphenol S, 6kg of potassium bicarbonate, 4.1kg of 4,4'-dichlorodiphenylsulfone, and 20kg of xylene into a 100L polymerization reactor. After evacuating the kettle to ≤-0.08MPa, feed nitrogen to make the pressure in the kettle reach ≥0.00MPa. After nitrogen replacement three times, feed nitrogen to normal pressure reaction. The whole polymerization reaction is carried out under nitrogen protection, with water at 155°C for 6 hours, during which the Compound 37g of end-capping agent p-ethylphenol and p-cresol (the mass ratio of the two is 2:3) and 4.8kg of 4,4'-dichlorodiphenyl sulfone are dissolved in 25kg of sulfolane and added to the reactor at a uniform speed Inside.

[0043] After the addition of water, all the xylene was distilled off, then the temperature was raised to 200°C, the polymerization was continued for 4 hours, and the reaction was terminated when the viscosity reached 8000 centipoise.

[0044] When the polyethersulfone p...

Embodiment 3

[0048] Add 30kg of dimethyl sulfoxide (DMSO), 5.3kg of biphenol, 5.8kg of potassium carbonate, 4.5kg of 4,4'-dichlorodiphenyl sulfone, and 20kg of xylene into a 100L polymerization reactor. After evacuating the kettle to ≤-0.08MPa, feed nitrogen to make the pressure in the kettle reach ≥0.00MPa. After nitrogen replacement three times, feed nitrogen to normal pressure reaction. The whole polymerization reaction is carried out under nitrogen protection, with water at 155°C for 5 hours. Compound 36g of end-capping agent bisphenol Z and phenol (the mass ratio of the two is 3:7) and 4.4kg of 4,4'-dichlorodiphenyl sulfone dissolved in 30kg of dimethyl sulfoxide and added to the reaction at a uniform speed Inside the cauldron.

[0049] After the addition of water, all the xylene was evaporated, and then the temperature was raised to 180°C, and the polymerization was continued for 8 hours, and the polymerization reaction was terminated when the viscosity reached 11,000 centipoise.

...

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Abstract

The invention relates to a preparation method of a polysulfone resin material with low cyclic dimer content, belonging to the technical field of polysulfone resin. The preparation method of the polysulfone resin material with the low cyclic dimer content in the invention comprises the following steps: with a phenolic substance and a part of 4,4'-dichlorodiphenyl sulfone used as reaction monomers,adding an aprotic exchange solvent, an acid-binding agent and a water-carrying agent, adding an end-capping reagent and the other part of 4,4'-dichlorodiphenyl sulfone at a constant speed in a water-carrying reaction period, then evaporating out the water-carrying agent, continuing to conduct polymerization, and then carrying out post-treatment to obtain the polysulfone resin material with the lowcyclic dimer content. The target polysulfone resin material prepared by using the method is high in purity and stable in performance.

Description

technical field [0001] The invention relates to a preparation method of a polysulfone resin material with low ring dimer content, and belongs to the technical field of polysulfone resin. Background technique [0002] Polysulfone is a high molecular polymer, an amorphous, thermoplastic resin, and its characteristics are: excellent mechanical properties, high rigidity, wear resistance, high strength, etc. Due to its good properties, polysulfone has been widely used in medical equipment, aerospace, electronics and other high-end materials. [0003] At present, the most advanced production process of polysulfone polymer materials is one-step polymerization. The one-step polymerization method is mainly divided into polymerization process and product purification process. [0004] (1) Polymerization process: the main raw materials are 4,4'-dichlorodiphenyl sulfone, bisphenol A, bisphenol S or biphenol, potassium carbonate or potassium bicarbonate, sodium carbonate, etc., polymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23C08G75/20
CPCC08G75/20C08G75/23
Inventor 王敏潘家永刘新新盖金军廖广明
Owner FUHAI (DONGYING) ADVANCED MATERIAL TECH CO LTD
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