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Method for purifying polyether ketone/polyether sulfone polymers

A purification method and polymer technology, applied in the field of polymers, can solve problems such as difficult to achieve purification effect, easy migration of impurities, small binding force, etc., and achieve the effect of good electrical insulation, excellent quality, and simple equipment

Inactive Publication Date: 2011-07-20
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method deals with an inorganic powder with large particles, and the combination of impurities and powder is physically mixed, the binding force is small, and the impurities are easy to move out.
Polyether ketone / polyether sulfone is an organic high polymer, in which the degree of combination of impurities and powder is close, both physical force and chemical force end group combination, it is difficult to achieve ideal purification by conventional technical methods effect, therefore, it is necessary to find a more efficient method of purifying polyetherketone / polyethersulfone

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1: Purification of polyether ether ketone (PEEK) resin prepared with sulfolane as solvent

[0040] Take 700g of the above-mentioned polyether ether ketone and grind it, put it together with 7kg of deionized water into a 10L ultrasonic cleaning machine with heating function, and the power density of the ultrasonic wave is 0.3W / cm 2 , the frequency is 50KHz, after ultrasonication for 40 minutes at 30°C, the material mixture is filtered by a centrifuge to remove most of the water, a cleaning process is completed, and the treatment is repeated 5 times, in which 0.5% by mass is added in the third time Phosphoric acid (relative to the water quality of this time), the pH value of the material mixed liquid system is 1.71, dried to constant weight under vacuum at 130°C, and the content of solvent and impurity ions in polyether ether ketone is determined, and the solvent content is determined by gas chromatography analyzer Determination, the polymer was processed accord...

Embodiment 2

[0046] Example 2: Purification of polyether ether ketone (PEEK) resin prepared with diphenyl sulfone as solvent

[0047] Take 20kg of the above-mentioned polyether ether ketone and grind it, then boil and wash it with 300L acetone for 8 times to remove the diphenyl sulfone in the material, then put the material squeezed out of acetone and 200kg deionized water into a 300L heating mantle and In a stainless steel container with several ultrasonic generators installed on the outer wall, the ultrasonic power density is 10W / cm 2 , frequency 300KHz; ultrasonic for 40 minutes at 70°C, filter the material mixture with a centrifuge to remove most of the water, complete a cleaning process, repeat the treatment 4 times, and add 0.3% mass parts (relatively This water quality) hydrochloric acid, the PH value of the mixed liquid system of the material is 1.08, dry it under vacuum at 130°C to constant weight, measure the content of impurity ions in polyetheretherketone, and treat the polym...

Embodiment 3

[0053] Example 3: Purification of polyethersulfone (PES) resin prepared with sulfolane as solvent

[0054] Take 20kg of the above-mentioned polyethersulfone and pulverize it, put it into a 300L stirring kettle together with 200kg of deionized water, and use an ultrasonic generator to make the power density of the ultrasonic waves generated in the kettle to be 20W / cm at a temperature of 50°C 2 , frequency 800KHz; after 60 minutes of treatment, filter the material mixture with a centrifuge to remove most of the water, complete a cleaning process, repeat the treatment 5 times, and add 1% by mass in the second time (relative to the water quality of this time) Phosphoric acid, the pH value of the mixed liquid system of the material is 1.56, and it is dried to constant weight under vacuum at 130°C to measure the content of solvent and impurity ions in polyethersulfone. The content of solvent and impurity ions was measured after treatment as shown in Table 5. Comparing Examples 1,...

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Abstract

The invention discloses a method for purifying polyether ketone / polyether sulfone polymers, which comprises: grinding polymers containing impurities, sieving, and filling in a container together with deionized water, treating in ultrasound at 20 to 95 DEG C for 20 to 60 minutes, filtering the material mixed liquid treated in ultrasound in a centrifuge to remove water, drying at 130 DEG C and under vacuum till constant weight, and thus obtaining the purified polymers, wherein in the ultrasonic treatment process, acid solution can be added to improve a purifying effect. The purified product contains less sodium, potassium, aluminum, calcium, iron, phosphorus, sulfur and the like. The method can quickly and efficiently purify polyether ketone / polyether sulfone polymers, adopt simple equipment, lower polymer purification temperature and pressure, greatly save energy, reduce production cost, easily apply to large-scale production line and meet requirements of industrial large-scale production. The polyether ketone / polyether sulfone polymers purified by the invention can be used for processing parts of electronic and electrical parts and manufacturing medical appliances.

Description

technical field [0001] The invention relates to the field of polymers, in particular to a method for purifying polyetherketone / polyethersulfone. technical background [0002] Polyetherketone / polyethersulfone has been commercialized for more than 30 years. Although its synthesis process has made great progress and improvement, the development of post-treatment purification technology in industrial production is rarely reported. However, the purity of polyetherketone / polyethersulfone is of great significance to the development of its application fields. For example, in the electronic device industry, the metal ion content is required to be at the ppb level, and in the medical and health industry, the content is lower. Currently, the preparation of polyetherketone / polyethersulfone Ethersulfone technology requires a large amount (at least 10wt%) of metal base or salt (such as KOH or Na 2 CO 3 etc.) as catalysts, how to remove metal ions from polymers as completely as possible ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/46C08G75/23
Inventor 代惊奇吴忠文赵东辉曾祥斌曹民饶先花
Owner KINGFA SCI & TECH CO LTD
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