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Functional polyamide and continuous production method thereof

A production method and polyamide technology, which are applied in the field of polymer material synthesis, can solve the problems of difficult to achieve high uniform dispersion of functional powders, poor spinning performance of functional polyamide chips and film-drawing performance, etc., and achieve large-scale industrialized continuous Production, easy industrialization implementation, the effect of reducing production energy consumption

Active Publication Date: 2019-05-17
CHINESE TEXTILE ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 continuous production method thereof
  • Functional polyamide and continuous production method thereof
  • Functional polyamide and continuous production method thereof

Examples

Experimental program
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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

The invention discloses functional polyamide and a continuous production method thereof. The method comprises the following steps: continuously conveying a functional powder slurry pre-dispersion prepared from water, caprolactam and functional powder by blending to a functional powder slurry multistage grinding device for grinding and dispersing; uniformly mixing obtained functional powder slurry,caprolactam melt and a catalyst by a dynamic mixer, adjusting the temperature by a heat exchanger, and feeding the mixture into a hydrolysis reactor for ring opening reaction; removing excess water from obtained functional caprolactam oligomer melt by an oligomer melt dehydrator, feeding the melt into a prepolymerization reactor for addition polymerization reaction; removing residual water from obtained functional polyamide prepolymer melt by a prepolymer melt dehydrator, and feeding the melt into a post polymerization reactor for polycondensation reaction; performing granulation, extractionand drying on obtained functional polyamide melt sequentially to obtain functional polyamide chips. Functional powder in functional polyamide continuously produced with the method is highly uniformlydispersed, and functional polyamide 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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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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