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Functional polyamide and its continuous production method

A production method and polyamide technology, which is applied in the field of polymer material synthesis, can solve the problems of difficulty in achieving high uniform dispersion of functional powders, poor spinning performance of functional polyamide chips, and poor film-drawing performance.

Active Publication Date: 2021-07-06
CHINESE TEXTILE ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of preparing functional polyamide by masterbatch method, the dispersion of functional powder in high-viscosity polyamide melt mainly depends on the mechanical shear force provided by mixing equipment, so it is difficult to realize the dispersion of functional powder in polyamide melt. The high uniform dispersion makes the spinning performance and film drawing performance of the prepared functional polyamide chips poor

Method used

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  • Functional polyamide and its continuous production method
  • Functional polyamide and its continuous production method
  • Functional polyamide and its continuous production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) The functional powder slurry pre-dispersion made of water, caprolactam and pigment blue 15:3 is continuously transported to the functional powder slurry multi-stage grinding device for grinding and dispersion, wherein water, caprolactam and pigment blue 15:3 The mass ratio is 1:0.8:1.8, and the functional powder slurry multi-stage grinding device is composed of 3 grinding machines connected in series to obtain a functional powder with a pigment blue 15:3 content of 50wt% and an average particle size of 0.28μm slurry;

[0047] (2) The functional powder slurry prepared in step (1) is mixed with the caprolactam melt and the catalyst through a dynamic mixer, and after the temperature is adjusted by a heat exchanger, it enters a hydrolysis reactor for ring-opening reaction, wherein the catalyst is phosphoric acid, catalyst The addition amount is 400ppm of the mass of the caprolactam melt, the addition amount of the functional powder slurry is 5% of the mass of the caprol...

Embodiment 2

[0054](1) The functional powder slurry pre-dispersion prepared by water, caprolactam and carbon black is continuously transported to the functional powder slurry multi-stage grinding device for grinding and dispersion, wherein the mass ratio of water, caprolactam and carbon black is 1: 0.8:0.77, the functional powder slurry multi-stage grinding device is composed of three grinding machines connected in series to obtain a functional powder slurry with a carbon black content of 30wt% and an average particle size of 0.11 μm;

[0055] (2) The functional powder slurry prepared in step (1) is mixed with the caprolactam melt and the catalyst through a dynamic mixer, and after the temperature is adjusted by a heat exchanger, it enters a hydrolysis reactor for ring-opening reaction, wherein the catalyst is phosphoric acid, catalyst The addition amount is 400ppm of the mass of caprolactam melt, the addition amount of functional powder slurry is 10.7% of the mass of caprolactam melt, the ...

Embodiment 3

[0062] (1) The functional powder slurry pre-dispersion prepared by water, caprolactam and pigment red 179 is continuously transported to the functional powder slurry multi-stage grinding device for grinding and dispersion, wherein the mass ratio of water, caprolactam and pigment red 179 is 1:0.5:0.375, the functional powder slurry multi-stage grinding device is composed of two grinding machines connected in series to obtain a functional powder slurry with a pigment red 179 content of 20wt% and an average particle size of 0.28 μm;

[0063] (2) The functional powder slurry prepared in step (1) is mixed with the caprolactam melt and the catalyst through a dynamic mixer, and after the temperature is adjusted by a heat exchanger, it enters a hydrolysis reactor for ring-opening reaction, wherein the catalyst is metaphosphoric acid, catalyst The addition amount of the caprolactam melt is 1000ppm, the addition amount of the functional powder slurry is 9.4% of the caprolactam melt mass,...

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Abstract

Disclosed are a functional polyamide and a continuous production method thereof. The method comprises: continuously conveying the functional powder slurry pre-dispersion prepared by water, caprolactam and functional powder to a functional powder slurry multi-stage grinding device for grinding and dispersing; the obtained functional powder slurry is mixed with caprolactam melt and The catalyst is mixed evenly by the dynamic mixer, and the temperature is adjusted by the heat exchanger, and then enters the hydrolysis reactor for ring-opening reaction; the obtained functional caprolactam oligomer melt is removed by the oligomer melt dehydrator and then enters the pre-polymerization reactor for Polyaddition reaction; the obtained functional polyamide prepolymer melt is dehydrated by the prepolymer melt dehydrator and then enters the post-polymerization reactor for polycondensation reaction; the obtained functional polyamide melt is successively pelletized, extracted and dried, A functional polyamide chip is obtained. The functional powder in the functional polyamide continuously produced by the method is highly uniformly dispersed, and is suitable for producing products such as high-quality fibers and films.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a functional polyamide and a continuous production method thereof. Background technique [0002] At present, the preparation method of functional polyamide is mainly the masterbatch method. The masterbatch method is to melt and mix the functional powder and the carrier resin to obtain a functional masterbatch with high functional powder content, and then uniformly mix the functional masterbatch melt and polyamide melt to obtain functional polyamide chips through extrusion granulation . In the process of preparing functional polyamide by masterbatch method, the dispersion of functional powder in high-viscosity polyamide melt mainly depends on the mechanical shear force provided by mixing equipment, so it is difficult to realize the dispersion of functional powder in polyamide melt. The high uniformity of dispersion makes the spinning performance and film pulli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/14C08G69/16C08K3/04
Inventor 李鑫邱志成王颖姜锋曲希明张厚羽金剑王雪马肖赵亮
Owner CHINESE TEXTILE ACAD
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