Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polyamide microspheres and preparation method thereof

A technology of polyamide and microspheres, which is applied in the field of polyamide microspheres and its preparation, can solve the problems of high toxicity of etching solvent toluene or tetrahydrofuran, long polymer dissolution time, unfavorable application requirements of polyamide microspheres, etc., to achieve The effect of shortening the process time

Active Publication Date: 2014-03-26
ホーフェイジーニアスアドバンストマテリアルカンパニーリミテッド
View PDF10 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that it takes a long time to dissolve the polymer mentioned in the above patent, and the etching solvent toluene or tetrahydrofuran is relatively toxic, which is not conducive to the application requirements of polyamide microspheres in bioengineering, cosmetics, etc.

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
  • Polyamide microspheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Poly 4-vinylpyridine (P 4 VP) is fully dissolved in caprolactam (PA6), where P 4 The weight ratio of VP / PA6 is 15:85, under the protection of nitrogen, at 140°C, after constant temperature stirring for 3 hours; 160°C, 0.0015MPa to remove water under reduced pressure for 20min, add 4wt% sodium caprolactam and 4wt% toluene diisocyanate, mix well After uniformity; quickly pour it into a preheated mold, the mold temperature is controlled at 150 ° C, and anionic ring-opening polymerization is carried out at a reaction temperature of 150 ° C and a reaction time of 15 minutes to obtain P 4 VP / PA6 alloy 1; then use 200wt% ethanol to P 4 VP / PA6 alloy 1 was dissolved, and the solvent was naturally volatilized at room temperature to obtain polyamide microspheres, whose average particle size is shown in Table 1.

Embodiment 2

[0037] Poly 4-vinylpyridine (P 4 VP) is fully dissolved in caprolactam (PA6), where P 4The weight ratio of VP / PA6 is 20:80, under the protection of nitrogen, at 140°C, after constant temperature stirring for 2 hours; 140°C, -0.1MPa to remove water under reduced pressure for 30min, add 2wt% sodium caprolactam and 4wt% toluene diisocyanate, fully After mixing evenly; quickly pour it into a preheated mold, the mold temperature is controlled at 160°C, and carry out anionic ring-opening polymerization reaction, the reaction temperature is 160°C, the reaction time is 15min, and P 4 VP / PA6 alloy 2; then use 200wt% ethanol to P 4 VP / PA6 alloy 2 was dissolved, and the solvent was naturally volatilized at room temperature to obtain polyamide microspheres. The average particle size is shown in Table 1.

Embodiment 3

[0039] Poly 4-vinylpyridine (P 4 VP) is fully dissolved in caprolactam (PA6), where P 4 The weight ratio of VP / PA6 is 25:75, under the protection of nitrogen, at 160°C, after constant temperature stirring for 2 hours; 160°C, 0.0015MPa to remove water under reduced pressure for 30min, add 4wt% sodium caprolactam and 4wt% toluene diisocyanate, and mix well After uniformity; quickly pour it into a preheated mold, the mold temperature is controlled at 150 ° C, and anionic ring-opening polymerization is carried out at a reaction temperature of 150 ° C and a reaction time of 15 minutes to obtain P 4 VP / PA6 alloy 3; then use 200wt% ethanol to P 4 VP / PA6 alloy 3 was dissolved, and the solvent was naturally volatilized at room temperature to obtain polyamide microspheres, whose average particle size is shown in Table 1.

[0040] figure 1 It is the scanning electron microscope (SEM) image of the surface morphology of polyamide microspheres.

[0041] The test conditions of the scanni...

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 invention belongs to the technical field of polymer materials, and discloses polyamide microspheres and a preparation method thereof. The polyamide microspheres are prepared from a polymer A, a lactam monomer B, a catalyst, a cocatalyst or / and a solvent, wherein the weight ratio of the polymer A to the lactam monomer B is 5:95 to 40:60, and the catalyst accounts for 0.2-5wt% of the total weight of the polymer A and the lactam monomer B; the cocatalyst accounts for 0.2-10wt% of the total weight of the polymer A and the lactam monomer B; and the solvent accounts for 50-500wt% of the total weight of the polymer A and the lactam monomer B. The invention also discloses the preparation method of the microspheres. According to the preparation method disclosed by the invention, any anionic polymerization initiator is not additionally added, the good solubility of the lactam monomer and the reaction characteristic of anionic ring-opening polymerization are used for preparing the polyamide microspheres through a one-step method, the process time is shortened, and the preparation method is more efficient and faster.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a polyamide microsphere and a preparation method thereof. Background technique [0002] Polymer microsphere is a kind of functional material with excellent performance. It has the characteristics of large specific surface area, strong adsorption capacity and strong surface reaction ability. It has shown good performance in high-tech industries such as biomedical engineering, electronics and microelectronics technology, and information technology industry. application prospects. Polyamide microspheres contain -NH 2 And -OH groups, these functional groups endow polyamide microspheres with broad application prospects in the fields of cosmetics and bioengineering, including protein immobilization. In addition, polyamide is an engineering plastic with excellent performance. It has the advantages of high strength, good wear resistance, chemical corrosion resistance and anti-a...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L39/08C08G69/20C08J3/16
CPCC08G69/20C08J3/16C08J2377/02C08J2439/08C08L77/02C08L2207/02C08L39/08
Inventor 蒋英杨桂生吴玉程
Owner ホーフェイジーニアスアドバンストマテリアルカンパニーリミテッド
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com