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Preparation method of polyether ketone ketone fine powder for coating

The technology of coarse polyetherketone ketone powder and polyetherketoneketone ketone is applied in the field of preparation of polyetherketoneketone ketone fine powder for coating, and can solve the problems of crushing hammer wear, high local temperature, affecting product index, performance and application range, etc. , to achieve the effect of improving crushing efficiency, eliminating particle edges and corners, and improving melting stability

Active Publication Date: 2019-09-10
SHANDONG KAISHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, mechanical crushing is usually used in the process of processing polyether ketone ketone coarse powder into fine powder. However, due to the high hardness and good toughness of PEKK, the crushing hammer is severely worn during the crushing process, and the ground metal powder enters the material. Even after strong magnetism, hydrocyclone separation and other anti-dandruff treatment, there are still some fine metal powders entering the material, and the crushing process can easily lead to excessive local temperature due to severe extrusion, friction and collision, thus affecting the product index , performance and scope of use

Method used

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  • Preparation method of polyether ketone ketone fine powder for coating
  • Preparation method of polyether ketone ketone fine powder for coating
  • Preparation method of polyether ketone ketone fine powder for coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Polyether ketone ketone is synthesized from diphenyl ether, terephthaloyl chloride (T) and isophthaloyl chloride (I) through Friedel-Crafts reaction. The molar ratio of T:1 in the product is 60:40. The polyether ketone ketone polymer is slowly added to a pipeline high-shear emulsifier for pulverization, and then washed and dried to obtain a polyether ketone ketone coarse powder. The particle size of the coarse powder is 0.1-3 mm. Take 100 kg of polyether ketone ketone coarse powder, and spray a mixed solution of concentrated hydrochloric acid (mass concentration of 31%) and ethanol, totaling 0.5 kg, on its surface. The mass ratio of concentrated hydrochloric acid to ethanol is 1:1. Keep it under vacuum conditions of 180℃ and 0.095MPa for 6 hours, then add 0.5kg of aluminum hydroxide powder with a particle size of D50 of 98μm, pulverize with a jet mill to obtain 93kg of polyetherketone ketone fine powder, which is measured by a laser particle size analyzer. 148μm.

[0030]...

Embodiment 2

[0035] The polyether ketone ketone polymer obtained in Example 1 is slowly added to an in-line high-shear emulsifier for pulverization, and then washed and dried to obtain a coarse polyether ketone ketone powder with a particle size of 0.1-3 mm. Take 100 kg of polyether ketone ketone coarse powder, and evenly spray the mixed solution of concentrated hydrochloric acid (mass concentration of 33%) and ethanol on its surface, totaling 2 kg. The mass ratio of concentrated hydrochloric acid to ethanol is 1:5. ℃, 0.096MPa vacuum conditions for 2 hours, then add 3kg of silica powder with a particle size of D50 of 85μm, pulverized by a jet mill to obtain 95kg of polyetherketone ketone fine powder, D50 of 55μm measured by a laser particle size analyzer, Under the scanning electron microscope, the edges of the particles have no edges and corners, and the shape is approximately spherical. After electrostatic spraying, the surface of the coating is smooth and defect-free. See the photo of t...

Embodiment 3

[0037] The polyether ketone ketone polymer obtained in Example 1 is slowly added to an in-line high-shear emulsifier for pulverization, and then washed and dried to obtain a coarse polyether ketone ketone powder with a particle size of 0.1-3 mm. Take 100 kg of polyether ketone ketone coarse powder, and evenly spray a mixed solution of concentrated hydrochloric acid (mass concentration of 36%) and ethanol on its surface, totaling 5 kg. The mass ratio of concentrated hydrochloric acid to ethanol is 1:10. ℃, 0.098MPa vacuum conditions for 3 hours, and then add 4kg of diamond powder with a particle size of D50 of 10μm, pulverized by a jet mill to obtain 94kg of polyetherketone ketone fine powder, D50 of 10μm measured by the laser particle size analyzer, in the scanning electron microscope Observe that the edges of the particles have no edges and corners, and the morphology is approximately spherical. After electrostatic spraying, the surface of the coating is smooth and defect-free...

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Abstract

The invention belongs to the technical field of polymer powder processing, and in particular relates to a preparation method of polyether ketone ketone fine powder for coating. The preparation method comprises the following steps: mechanically pulverizing a polymerized polyether ketone ketone polymer, washing and drying to obtain polyether ketone ketone coarse powder, performing stabilizing treatment on the coarse powder, then adding a certain amount of modifier to obtain mixed powder, and pulverizing the mixed powder with air flow to obtain polyether ketone ketone fine powder. The preparation method has a simple process, high pulverization efficiency and low impurity content, the prepared polyether ketone ketone fine powder has uniformity of dispersion and concentrated particle size distribution, the granular form is near-spherical, and the polyether ketone ketone fine powder is particularly suitable for an electrostatic spraying process, and can effectively improve the uniformity and liquidity of coating, decrease coating defects, play the characteristics of the polyether ketone ketone and improve the stability of coating.

Description

Technical field [0001] The invention belongs to the technical field of polymer powder processing, and specifically relates to a preparation method of polyether ketone ketone fine powder for coatings. Background technique [0002] Polyether ketone ketone (PEKK) resin is a semi-crystalline thermoplastic special engineering plastic. It is another special structural thermoplastic resin developed after polyether ether ketone (PEEK). It has excellent high temperature resistance, mechanical properties, and Corrosion and tribological properties, etc., and due to its unique chemical structure, it can form a high adhesion coating with metals, which is better than polytetrafluoroethylene (PTFE) coating and polyphenylene sulfide (PPS) coating It has excellent heat resistance, impact resistance and scratch resistance, and it can be coated on the metal surface to obtain PEKK coating products with excellent performance and a wide range of applications. [0003] Electrostatic powder spraying tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D171/10C09D5/03C08J3/00B02C21/00
Inventor 张泰铭孙庆民李光辉张聪聪王荣海王军黄桂青张际亮王帅坡张海张瑞光韩楠楠
Owner SHANDONG KAISHENG NEW MATERIALS
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