Polymer powder and preparation method thereof

A technology of polymer powder and polymer, applied in the field of polymer powder, can solve the problems of complex process, multi-organic reagents, high temperature resistance of active agents, etc.

Active Publication Date: 2021-09-03
INST OF CHEM CHINESE ACAD OF SCI
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder prepared by this method has better sphericity, but requires more organic reagents, and requires relatively precise control of the phase separation process, and the process is more complicated
[0006] In addition, the preparation of polymer micropowder also includes methods such as cryogenic pulverization and melt dispersion, but the cryogenic pulverization method is not suitable for polymers with strong toughness and low embrittlement temperature, and consumes a large amount of liquid nitrogen and is relatively expensive. High; and although the melt dispersion method uses water as the solvent and uses high-speed dispersion to prepare polymer powder in a short time, it needs to add a large amount of active agent in the process. This type of active agent is difficult to withstand high temperature and the cost is high, so it is not suitable for popularization.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polymer powder and preparation method thereof
  • Polymer powder and preparation method thereof
  • Polymer powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this example, the polymer powder was prepared by the following method:

[0050] (1) Take by weighing 100g distilled water, 5gMC nylon and 5g polyvinyl alcohol, put into reaction kettle;

[0051] (2) Tighten the reaction kettle, and use a pump to evacuate for about half a minute;

[0052] (3) Turn on the heating, set the target temperature at 180°C, and the initial stirring speed is 20rpm; when the temperature rises to 180°C, increase the stirring speed to 3000rpm, and keep warm for 1h;

[0053] (4) Turn off the heating, open the kettle after naturally cooling to a pressure of 0 MPa; the material in the reactor is suction filtered, washed with water, repeated three times, until there is almost no polyvinyl alcohol in the washing water;

[0054] (5) dry naturally, and sieve to obtain the product.

Embodiment 2

[0056] In this example, the polymer powder was prepared by the following method:

[0057] (1) Take by weighing 120g distilled water, 6g polyamide 66 and 8g polyvinyl alcohol, put into reactor;

[0058] (2) Tighten the reaction kettle, and use a pump to evacuate for about half a minute;

[0059] (3) Turn on the heating, set the target temperature at 220°C, and the initial stirring speed is 20rpm; when the temperature rises to 180°C, increase the stirring speed to 2000rpm, and keep warm for 40min;

[0060] (4) Turn off the heating, open the kettle after naturally cooling to a pressure of 0 MPa; the material in the reactor is suction filtered, washed with water, repeated three times, until there is almost no polyvinyl alcohol in the washing water;

[0061] (5) dry naturally, and sieve to obtain the product.

Embodiment 3

[0063] In this example, the polymer powder was prepared by the following method:

[0064] (1) Take by weighing 100g distilled water, 10g polyamide 6 and 15g polyvinyl alcohol, put into reaction kettle;

[0065] (2) Tighten the reaction kettle, and use a pump to evacuate for about half a minute;

[0066] (3) Turn on the heating, set the target temperature at 180°C, and the initial stirring speed is 20rpm; when the temperature rises to 180°C, increase the stirring speed to 3000rpm, and keep warm for 40min;

[0067] (4) Turn off the heating, open the kettle after naturally cooling to a pressure of 0 MPa; the material in the reactor is suction filtered, washed with water, repeated three times, until there is almost no polyvinyl alcohol in the washing water;

[0068] (5) dry naturally, and sieve to obtain the product.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention discloses a polymer powder and a preparation method thereof. The powder is prepared by mixing, heating and drying a polymer and a water-soluble polymer in deionized water, and the particle size range of the powder is 1-1000 [mu]m through laser particle size measurement; and the polymer is selected from one or more of polyamide, polyacrylonitrile, polyester and copolymers thereof. According to the method for preparing the pure polymer powder with the good sphericity degree in one step, the polymer and the water-soluble polymer are stirred in water under the conditions of certain pressure and temperature and then dried to prepare the powder, then the water-soluble polymer is washed away with water, and compared with a common organic solvent system preparation mode in the prior art, the method is more environmentally friendly, and is suitable for being popularized and used.

Description

technical field [0001] The invention belongs to the field of polymer powder, and in particular relates to a polymer powder and a preparation method thereof. Background technique [0002] Polymer powder maintains the excellent physical and chemical properties of the polymer itself, and has the advantages of large specific surface area and easy processing. It can be used in cosmetics, coatings, adsorbents, chromatography media and other fields. With the development of 3D printing, polymer powders are gradually applied in the 3D printing industry. According to different applications, there are different requirements for the particle size and sphericity of polymer powder. [0003] The preparation methods of polymer powder generally include dissolution precipitation method and mechanical pulverization method. [0004] The Chinese patent with the application number 201010597529.8 discloses a method for preparing nylon powder for selective laser sintering, which uses nylon pellet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L77/02C08L29/04C08L77/06C08L33/26C08L33/20C08L71/02C08L67/02C08L35/00C08J3/12
CPCC08J3/12C08J2377/02C08J2429/04C08J2329/04C08J2477/02C08J2477/06C08J2333/26C08J2333/20C08J2433/20C08J2433/26C08J2467/02C08J2371/02C08J2335/00
Inventor 马永梅路兴婷张京楠曹新宇郑鲲叶钢
Owner INST OF CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap