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Flame-retardant anti-dripping polyamide sheet preparation method

A polyamide film and anti-melting droplet technology, applied in the field of film preparation, can solve the problems affecting the quality of polyamide film products, poor dispersibility, poor compatibility, affecting melt fluidity, etc., and achieves loose process parameter setting requirements, The effect of low mobility and long interaction time

Inactive Publication Date: 2018-10-19
东阳市特意新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the generally poor dispersibility and compatibility of the above-mentioned functional additives and polyamides, when the above-mentioned substances cannot be fully compatible with the melt in a short period of time, adding a large amount of functional additives will affect the melt. Fluidity, which affects the quality of polyamide film products, so the process parameters must be strictly controlled in the melt stretching process to solve the above technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders:

[0033]1) Add 100 parts of L-aspartic acid-N-carboxyl-cyclic anhydride and 2 parts of nickel chelate catalyst to 80 parts of N,N-dimethylformamide, stir under nitrogen protection at 32°C React for 12h; then add L-proline-N-carboxy-anhydride in the ring, continue to heat and stir for 18h; then add L-glutamic acid-N-carboxyl-anhydride in the ring, continue to heat and stir for 12h; Alkane precipitation and preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles by dialysis; wherein L-aspartic acid-N-carboxy-anhydride, L-proline-N-carboxy-ring The molar ratio of internal anhydride to L-glutamic acid-N-carboxy-cyclic internal anhydride is 1:1.3:1.

[0034] 2) Add 10 parts of chain extender to 2000 parts of ethanol solution with a pH of 12 and stir evenly, then add 100 parts of aspartic acid-proline-glutamic acid copolymer nanoparticles and ultrasonica...

Embodiment 2

[0040] Preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders:

[0041] 1) Add 100 parts of L-aspartic acid-N-carboxyl-cyclic anhydride and 2.5 parts of nickel chelate catalyst to 60 parts of N,N-dimethylformamide, stir under nitrogen protection at 32°C React for 12 hours; then add L-proline-N-carboxy-anhydride in the ring, continue to heat and stir for 14 hours; then add L-glutamic acid-N-carboxyl-anhydride in the ring, continue to heat and stir for 12 hours; Alkane precipitation and preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles by dialysis; wherein L-aspartic acid-N-carboxy-anhydride, L-proline-N-carboxy-ring The molar ratio of internal anhydride to L-glutamic acid-N-carboxy-cyclic internal anhydride is 1:1.1:1.

[0042] 2) Add 10 parts of chain extender to 2000 parts of ethanol solution with a pH of 11 and stir evenly, then add 90 parts of aspartic acid-proline-glutamic acid copolymer nanoparticle...

Embodiment 3

[0048] Preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders:

[0049] 1) Add 100 parts of L-aspartic acid-N-carboxyl-cyclic anhydride and 1 part of nickel chelate catalyst to 50 parts of N,N-dimethylformamide, stir under nitrogen protection at 30°C React for 8h; then add L-proline-N-carboxy-anhydride in the ring, continue to heat and stir for 24h; then add L-glutamic acid-N-carboxyl-anhydride in the ring, continue to heat and stir for 8h; Alkane precipitation and preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles by dialysis; wherein L-aspartic acid-N-carboxy-anhydride, L-proline-N-carboxy-ring The molar ratio of internal anhydride to L-glutamic acid-N-carboxy-cyclic internal anhydride is 0.8:1.5:0.8.

[0050] 2) Add 10 parts of chain extender to 2000 parts of ethanol solution with a pH of 14 and stir evenly, then add 90 parts of aspartic acid-proline-glutamic acid copolymer nanoparticles and ultrasonic...

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Abstract

The invention relates to the field of film preparation and discloses a flame-retardant anti-dripping polyamide sheet preparation method which comprises the following steps: A) pretreating: utilizing asilane coupling agent to pretreat magnesium hydroxide crystal whisker, aluminum borate crystal whisker and calcium carbonate crystal whisker; B) polymerizing: evenly mixing caprolactam, an inorganicacid catalyst, binary acid, the magnesium hydroxide crystal whisker, the aluminum borate crystal whisker, the calcium carbonate crystal whisker, aspartic acid-proline-glutamic acid copolymer nanoparticle loaded with a chain extender and water and heating and reacting to prepare polyamide slices; C) stretching: heating and fusing the polyamide slices, then longitudinally and horizontally stretchingand heat setting the heated and fused polyamide slices to prepare polyamide sheets. According to the method disclosed by the invention, a functional aid is added in advance when polyamide is polymerized, fusion time of the functional aid and a polyamide matrix is long, and compatibility is better; thus, an effect on melt fluidity is smaller, a technological parameter setting requirement in a fusing and stretching process is looser, and controllability is strong.

Description

technical field [0001] The invention relates to the field of film preparation, in particular to a preparation method of a flame-retardant and droplet-resistant polyamide film. Background technique [0002] Polyamide film is made of nylon resin, which can be manufactured by T-type (extrusion casting) film forming method (non-stretched film), T-type biaxially stretched film forming method and blown expansion method (biaxially stretched film). . The most prominent advantage of polyamide film is its strength and good wear resistance. But at the same time, the disadvantages of polyamide film are also obvious. Its flame retardancy is poor, and after the polyamide molecular chain is burned, the amide bond on the polyamide molecule is easy to break at high temperature, which makes the molecular chain shorter and the molecular weight lower. It is easy to drop, which seriously affects the drop resistance of the film. [0003] In order to solve the above technical problems, various ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K13/06C08K9/06C08K7/08C08J5/18
CPCC08J5/18C08J2377/02C08K7/08C08K9/06C08K13/06C08K2201/014
Inventor 吴晓薇
Owner 东阳市特意新材料科技有限公司
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