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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Polyamide microspheres and preparation method thereof

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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...

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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

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Application Information

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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
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