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Preparation method of water-based polyethersulfone dispersion

A technology of polyethersulfone and dispersion liquid is applied in the field of preparation of water-based polyethersulfone dispersion liquid. Effect

Inactive Publication Date: 2020-11-03
ZIGONG CHUANLV EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic preparation of water-based polyethersulfone dispersion generally adopts the long-term wet grinding of polyethersulfone in a ball mill. The main disadvantages of this method are: first, high energy consumption and long production cycle; second, polyethersulfone The particle size is large, the distribution is wide, and the shape is different; the third is that the molecular structure of polyethersulfone resin is damaged by mechanical force, and it is prone to yellowing when applied in downstream industries
The disadvantage of this method lies in two points: First, the processing temperature of the polyethersulfone dispersion in the later application will reach 400 ° C, and the surfactant is often decomposed at this temperature, resulting in more obvious yellowing in the later application of the product ; Second, the surfactant remains in the wastewater during the production process, which is difficult to recycle and easily lead to environmental pollution

Method used

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  • Preparation method of water-based polyethersulfone dispersion
  • Preparation method of water-based polyethersulfone dispersion
  • Preparation method of water-based polyethersulfone dispersion

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preparation example Construction

[0031] The preparation method of water-based polyethersulfone dispersion is prepared according to the following steps,

[0032] (1) Mix polyethersulfone and organic solvent at a mass ratio of 1:4-5, stir at 50-70°C for 4-6 hours to obtain polyethersulfone suspension; this step makes polyethersulfone swell in organic solvent Stirring at this temperature can speed up the dissolution of polyethersulfone; the organic solvent is a low-boiling organic solvent, which can be easily recovered without forming an azeotrope during distillation.

[0033] (2) After cooling the polyethersulfone suspension, disperse for 4 to 8 minutes, add the sedimentation liquid according to the mass ratio of polyethersulfone and sedimentation liquid at 1:5 to 7, and continue to disperse for 20 to 30 minutes to obtain a white mixed slurry; Described precipitation liquid is the liquid that organic solvent and deionized water are mixed by mass ratio 1:2~3;

[0034] (3) distilling the white mixed slurry to ob...

Embodiment 1

[0046] The preparation of embodiment 1 water-based polyethersulfone dispersion (method of the present invention)

[0047] Taking a 100L reactor as an example, prepare raw materials according to the following quality: polyethersulfone resin (8Kg), chloroform (40Kg), precipitation solution (48Kg, of which chloroform accounts for 16Kg, and deionized water accounts for 32Kg).

[0048] Accurately weigh the above formula components respectively, add polyethersulfone resin (8Kg) and chloroform (40Kg) into a 100L reactor equipped with a water separator, agitator and heating device, start stirring, and heat the reactor to 60°C , a polyethersulfone suspension was obtained after stirring for 4 hours.

[0049] Then the temperature of the reaction kettle was lowered to normal temperature, and the polyethersulfone suspension was put into a colloid mill with a shearing and grinding function for forced dispersion. After adding the precipitation liquid, continue to stir for 25 minutes to obta...

Embodiment 2

[0051] The preparation of embodiment 2 water-based polyethersulfone dispersion (method of the present invention)

[0052] Taking a 100L reactor as an example, prepare raw materials according to the following quality: polyethersulfone resin (8Kg), chloroform (32Kg), precipitation solution (40Kg, of which chloroform accounts for 10Kg, and deionized water accounts for 30Kg).

[0053] Accurately weigh the above formula components respectively, add polyethersulfone resin (8Kg) and chloroform (32Kg) into a 100L reactor equipped with a water separator, agitator and heating device, start stirring, and heat the reactor to 50°C , a polyethersulfone suspension was obtained after stirring for 5 hours.

[0054] Then the temperature of the reaction kettle was lowered to normal temperature, and the polyethersulfone suspension was put into a colloid mill with a shearing and grinding function for forced dispersion. The speed of the colloid mill was 4500 rpm, and after 6 minutes of forced dispe...

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Abstract

The invention relates to the field of high molecular materials, in particular to a preparation method of water-based polyether sulfone dispersion liquid. The preparation method includes swelling polyether sulfone resin in low-boiling-point organic solvent chloroform or tetrahydrofuran to form polyether sulfone suspension liquid, adding the polyether sulfone suspension liquid into dispersion equipment with shearing and grinding functions to perform forced dispersion, adding precipitation liquid into the dispersion equipment to continue dispersion until the polyether sulfone resin is separated out in the form of particles in the liquid to form mixed size, distilling the mixed size into distillation equipment and recycling organic solvent to obtain the water-based polyether sulfone dispersion liquid. The polyether sulfone resin prepared according to the method is separated out gradually in the precipitation liquid through grinding dispersion, the diameters of the particles are small and uniform, the molecular chain structure of the polyether sulfone resin is not damaged, production efficiency is high, and performance is stable.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method of a water-based polyethersulfone dispersion. 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 polyethersulfone molecular chain, and the sulfone group forms a large conjugated system with the entire structural unit. Due to these characteristics, polyethersulfone has the advantages of high strength, high temperature resistance, radiation resistance, acid resistance, oxidation resistance, etc., and has excellent characteristi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/05C08J3/11C08J3/09C08L81/06
CPCC08J3/05C08J3/093C08J3/095C08J3/11C08J2381/06C08L81/06C08L2201/54
Inventor 卢灵煜刘琳钟家春
Owner ZIGONG CHUANLV EQUIP MFG
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