Purification method of polyether sulphone

A purification method and technology of polyether sulfone, applied in the field of purification of polyether sulfone, can solve the problems of unfavorable environmental protection, operator safety, insignificant removal effect, and ineffective purification of polyether sulfone and polyether sulfone, etc., and achieve the purification effect. Significant, environmentally friendly, and easy to buy effects

Inactive Publication Date: 2005-08-10
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another example is the Japanese patent JP1043524, which uses fatty alcohols such as methanol, or fatty ketones such as acetone, or a mixture of the two to purify polyethersulfone at room temperature to 50°C. This method can more effectively remove polyethersulfone during the preparation process. Solvent sulfolane and low molecular weight polyethersulfone, but the effect of removing inorganic ions such as sodium, potassium, chloride, and sulfate is not obvious; in addition, this method uses a large amount of organic solvents such as fatty alcohols or fatty ketones, which is not conducive to the environment Protection and safety of operators
Therefore, these methods are not a good way to effectively purify polyethersulfone and improve the purity of polyethersulfone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Example 1: Add 50 grams of 30-mesh polyethersulfone resin, 25 milliliters of polyethylene glycol (PEG) and 500 milliliters of deionized water into 1000 milliliters of 1Mpa autoclave respectively, the autoclave should be able to withstand the pressure of 1MPa, stir vigorously , heated up to 100°C and kept for 3 hours. After the purification process is completed, the system is cooled to below 100° C., the stirring is stopped, and suction filtration is performed. The filter residue is washed with boiling deionized water and suction filtration 3 times. The amount of washing liquid used each time is 250 ml. Then, the above-mentioned purified polyethersulfone was dried at 80° C. and 0.07 MPa vacuum conditions for 1 hour to obtain purified polyethersulfone PES-1.

Embodiment 2

[0037] Example 2: Add 20 grams of 80-mesh polyethersulfone resin, 50 milliliters of polyethylene glycol (PEG) and 500 milliliters of deionized water into a 1000 milliliter 1Mpa autoclave, stir vigorously, heat up to 130 ° C, and keep 5 hours. After the purification process is completed, the system is cooled to below 100°C, the stirring is stopped, and suction filtration is performed. The filter residue is washed with boiling deionized water and suction filtration 4 times, and the amount of washing liquid used each time is 400 ml. Then, the polyethersulfone subjected to the above-mentioned purification treatment was dried for 2 hours at 100° C. and a vacuum condition of 0.08 MPa to obtain purified polyethersulfone PES-2.

Embodiment 3

[0038] Example 3: Add 10 grams of 150-mesh polyethersulfone resin, 50 milliliters of polyethylene glycol (PEG) and 600 milliliters of deionized water into a 1000 milliliter 1Mpa autoclave, stir vigorously, heat up to 180 ° C, and keep 10 hours. After the purification process is completed, the system is cooled to below 100° C., the stirring is stopped, and suction filtration is performed. The filter residue is washed with boiling deionized water and suction filtration 5 times, and the amount of washing liquid used each time is 500 ml. Then, the above-mentioned purified polyethersulfone was dried at 120° C. and 0.08 MPa under vacuum conditions for 3 hours to obtain purified polyethersulfone PES-3.

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Abstract

A process for purifying polyether sulfone includes such steps as loading polyether sulfone in reactor, proportionally adding deionized water and surfactant, heating while stirring for at least 3 hr, cooling, filtering, washing with boiling deionized water several times, filtering, and drying.

Description

1. Technical field [0001] The invention relates to a purification technology of polyethersulfone (PES), in particular to a purification method of polyethersulfone. 2. Background technology [0002] Polyethersulfone (PES) is a special engineering plastic with high heat resistance, which has excellent mechanical strength, electrical properties and radiation resistance, and it has good molding processability as a thermoplastic resin, which can be extruded, injected, pressed and other processing methods, and the profiles can also be processed by mechanical processing methods. [0003] The industrial production of polyethersulfone usually uses 4,4'-dihydroxydiphenylsulfone, namely bisphenol S, dissolved in the solvent sulfolane, and reacts with sodium hydroxide or potassium hydroxide solution at 100-200°C to form a salt. Bisphenol S salt, and then raise the temperature of the system to 210-230 ° C to make bisphenol S salt and 4,4'-dichlorodiphenyl sulfone undergo polycondensatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23
Inventor 杨文彬余自力程光磊郭岳谢美菊
Owner SICHUAN UNIV
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