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High-temperature-resistant polyamide plastic and preparation method thereof

A technology of polyamide and high temperature resistance, which is applied in the field of high temperature resistant polyamide plastics and its preparation. It can solve problems such as dispersion, poor compatibility, affecting melt fluidity, and affecting the quality of polyamide products, and achieves good compatibility. , long interaction time, loose process parameter setting requirements

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 products, so the process parameters must be strictly controlled in the process of melt extrusion to solve the above technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders:

[0035] 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.

[0036] 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 ultrasonic...

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 nanoparticles...

Embodiment 3

[0046] Preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders:

[0047] 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.

[0048] 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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PUM

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Abstract

The invention relates to the field of plastic synthesis, and discloses a high-temperature-resistant polyamide plastic and a preparation method thereof. The polyamide plastic is prepared from 90 to 110parts of caprolactam, 1 to 3 parts of inorganic acid catalysts, 3 to 5 parts of binary acid, 4 to 6 parts of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders, 0.01 to 0.5 part of heat stabilizers, 0.01 to 05 part of antioxidants and 10 to 50 parts of water. The method has the advantages that during the polymerization of polyamide, functional auxiliary agentsare added in advance; the functional auxiliary agents have good compatibility with the polyamide base body; the influence on the flowability of melt is small; the setting requirement on the process parameters of the molten extrusion process is relatively loose; the controllability is strong.

Description

technical field [0001] The invention relates to the field of plastic synthesis, in particular to a high-temperature-resistant polyamide plastic and a preparation method thereof. Background technique [0002] As a commonly used plastic, polyamide has the advantages of good wear resistance, high tensile strength and good resilience. But at the same time, the disadvantages of polyamide are also obvious. Its heat resistance is poor. At high temperature, the amide bond on the polyamide molecule is easy to break, which makes the molecular chain shorter and the molecular weight lower, so that the polyamide is easy to age and seriously affects the product. quality. [0003] In order to solve the above technical problems, people add various antioxidants, heat stabilizers, etc. during the melt extrusion of polyamide. However, due to the generally poor dispersibility and compatibility of the above-mentioned functional additives and polyamides, when the above-mentioned substances cann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/04C08L33/12C08K5/57C08K5/092C08K5/353C08G69/14C08G69/16C08G69/10
CPCC08G69/10C08G69/14C08G69/16C08L77/02C08L2201/08C08L2205/03C08L77/04C08L33/12C08K5/57C08K5/092C08K5/353
Inventor 吴晓薇
Owner 东阳市特意新材料科技有限公司
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