Ageing-resistant nylon elastomer and preparation method thereof

A nylon elastomer, anti-aging technology, applied in the field of nylon elastomer synthesis, can solve the problems of dispersion, poor compatibility, affecting melt fluidity, affecting the quality of nylon elastomer products, etc., to achieve good compatibility and mutual The effect of long action time and 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 dispersion and compatibility of the above-mentioned functional additives with nylon, 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 flow of the melt Therefore, the process parameters must be strictly controlled in the process of screw extrusion to solve the above technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders:

[0043] 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.

[0044]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

[0049] Preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders:

[0050] 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.

[0051] 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...

Embodiment 3

[0056] Preparation of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders:

[0057] 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.

[0058] 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...

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Abstract

The invention relates to the field of synthesis of a nylon elastomer and discloses an ageing-resistant nylon elastomer and a preparation method thereof. The ageing-resistant nylon elastomer comprises5 to 15 percent of polyether prepolymer, 5 to 15 percent of polyester prepolymer, 45 to 55 percent of caprolactam, 0.5 to 1.5 percent of inorganic acid catalyst, 5 to 10 percent of binary acid, 5 to 10 percent of diamine, 0.01 to 0.05 percent of organic acid catalyst, 3 to 5 percent of aspartic acid-proline-glutamic acid nanoparticles loaded with a chain extender, 0.01 to 0.5 percent of antioxidant, 0.01 to 0.5 percent of ultraviolet-resistant agent and the balance of water. By the method, a functional aid is added in advance during polyamide polymerization, the functional aid and a polyamidematrix have high compatibility, influence on the flowability of melt is small, the requirement of setting process parameters in the melt extrusion process is loose, and the controllability is high.

Description

technical field [0001] The invention relates to the field of nylon elastomer synthesis, in particular to an aging-resistant nylon elastomer and a preparation method thereof. Background technique [0002] Nylon elastomer is mainly made of polyamide and polyether and / or polyester, and is a thermoplastic elastomer without plasticizers. It has the advantages of oil resistance, chemical resistance, wear resistance, super toughness and good resilience, and is widely used. [0003] But at the same time, the shortcomings of nylon are also obvious. Its heat resistance and light resistance are poor. Under high temperature or long-term light, the amide bond on the polyamide molecule is easy to break, making the molecular chain shorter and the molecular weight lower, making nylon elastic. The body is prone to aging, seriously affecting its strength and resilience. [0004] In order to solve the above technical problems, people add various antioxidants, anti-ultraviolet agents, etc. wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L71/00C08L67/00C08G69/36
CPCC08G69/36C08L77/06C08L2205/03C08L71/00C08L67/00
Inventor 吴晓薇
Owner 东阳市特意新材料科技有限公司
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