Method for purifying poly ether-ether-ketone

A polyether ether ketone and purification method technology, applied in the field of polyether ether ketone purification, can solve the problems of increased desalinated water washing time, consumption, large desalinated water, etc., and achieves easy industrialized batch production, simple process conditions, and operation steps little effect

Inactive Publication Date: 2005-07-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These impurity ions may be wrapped inside the polyether ether ketone resin, therefore, the unpurified polyetheretherketone resin cannot be used for the purposes mentioned above
[0005] In order to minimize the inorganic ion content in polyetheretherketone resin, polyetheretherketone needs to be purified in the post-treatment stage of producing polyether ether ketone. Now, more methods are used, such as increasing the number of washing times of desalted water, increasing desalination Wa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Put 10 grams of 30-mesh polyetheretherketone resin, 2 grams of polyvinyl alcohol (PVA) and 100 milliliters of N-methyl-2-pyrrolidone (NMP) into a 250 milliliter three-necked bottle, stir vigorously, Heat to 150°C and keep for 1 hour; after the purification process is completed, cool the purification system to below 100°C, stop stirring, and filter with suction, and filter the filter cake with boiling acetone, boiling absolute ethanol and boiling deionized water respectively. Wash 3 times and suction filter 3 times, the amount of washing solution used each time is 10 ml. Then, the polyetheretherketone treated above was dried for 1 hour under the vacuum condition of a temperature of 80° C. and a vacuum degree of 0.07 MPa to obtain high-purity polyetheretherketone PEEK-1.

Embodiment 2

[0035]Embodiment 2: Put 10 grams of 300-mesh polyetheretherketone resin, 100 grams of polyethylene glycol (PEG) and 1000 milliliters of N-methyl-2-pyrrolidone into a 2000 milliliter three-necked bottle, stir vigorously, and heat to 205°C and keep for 10 hours. After the purification process is completed, cool the purification system to below 100°C, stop stirring, and suction filter, wash the filter cake with boiling acetone, boiling absolute ethanol and boiling deionized water 6 times respectively and suction filter 6 times, The amount of washing liquid used each time is 500 ml. Then, the above-treated polyetheretherketone was dried for 5 hours under vacuum conditions at a temperature of 140° C. and a vacuum degree of 0.09 MPa to obtain high-purity polyetheretherketone PEEK-2.

Embodiment 3

[0036] Example 3: Put 10 grams of 100-mesh polyetheretherketone resin, 8 grams of polyvinyl alcohol and 300 milliliters of N-methyl-2-pyrrolidone into a 500 milliliter three-necked bottle, stir vigorously, heat up to 180 ° C, and keep 5 hours. After the purification process is completed, cool the purification system to below 100°C, stop stirring, filter with suction, wash the filter cake with boiling acetone, boiling absolute ethanol and boiling deionized water 4 times and 4 times respectively, each time The amount of washing liquid used was all 100 ml. Then, the above-treated polyetheretherketone was dried for 3 hours under a vacuum condition of a temperature of 120° C. and a vacuum degree of 0.08 MPa to obtain high-purity polyetheretherketone PEEK-3.

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PUM

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Abstract

The normal pressure poly(ether-ether-ketone) purifying process includes the technological steps of purification, suction filtering and washing, and drying. During purification, metered poly(ether-ether-ketone) and metered organic solvent and surfactant used as purifying treating agent and purifying assistant separately inside reactor are heated at normal pressure to the temperature between the vitrification point of poly(ether-ether-ketone) and the boiling point of the purifying treating agent for purification for at least 1 hr. Then, the temperature is lowered to below 100 deg.c, and the product is suction filtered, washed with boiling acetone, absolute alcohol and deionized water, and dried to obtain high purity poly(ether-ether-ketone) product. The said process can lower the content of inorganic ion in poly(ether-ether-ketone) product.

Description

1. Technical field: [0001] The invention relates to a purification technology of polyetheretherketone (PEEK), in particular to a purification method of polyetheretherketone under normal pressure. 2. Background technology: [0002] Polyether ether ketone (PEEK) is a special engineering plastic with high heat resistance, which has the highest heat resistance among thermoplastics, and has excellent mechanical strength, electrical properties and radiation resistance. It can be extruded, injected , Pressing and other processing methods are processed and shaped, and the profiles can also be processed by mechanical processing methods. [0003] PEEK has been widely used in special industries, such as aerospace parts, special mechanical parts, military structural parts, military electronic parts, nuclear power and other high-tech fields. Since the directly produced polyether ether ketone contains a large amount of inorganic ions, when used in electronic and electrical applications, ...

Claims

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Application Information

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IPC IPC(8): C08G65/30C08G65/46
CPCY02P20/582
Inventor 余自力杨文彬谢美菊
Owner SICHUAN UNIV
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