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Polyamide 5X resin as well as preparation method and application thereof

A polyamide resin and polyamide technology, applied in the field of polyamide materials, can solve the problems of broken ends, no observed melting double peaks, uneven deformation, etc.

Pending Publication Date: 2020-04-21
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some reports of double or multiple melting peaks during differential scanning calorimetry, but there is no consistent theoretical explanation for the reasons for these phenomena
Moreover, there is no record of observing double peaks of melting for polyamide 5X polymerized from 1,5-pentanediamine and dibasic acid
[0005] In order to solve the problems such as non-uniform deformation of polyamide resin in the application of stretched film, poor tensile properties and monofilament breakage, floating phenomenon and spinning breakage in the preparation process of polyamide 5X fiber, the present invention has dual Melting peaks of polyamide resins were studied

Method used

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  • Polyamide 5X resin as well as preparation method and application thereof
  • Polyamide 5X resin as well as preparation method and application thereof
  • Polyamide 5X resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095](1) Under nitrogen conditions, mix 1,5-pentanediamine, adipic acid and water evenly to obtain 80% polyamide salt solution, wherein the salt weighs 20kg; 1,5-pentanediamine and adipic acid The molar ratio is (1-1.05):1, and the pH value of the polyamide salt solution is 7.90 when the concentration of the polyamide salt solution is 10wt.%. The percentage is the mass percentage of the polyamide salt solution.

[0096] (2) Heat the salt solution of polyamide, the pressure in the reaction system rises to 1.7Mpa, exhaust, keep the pressure, the temperature of the reaction system at the end of the pressure keeping is 245°C, and then reduce the pressure to reduce the pressure in the reaction system to 0.01MPa (gauge pressure), the temperature of the reaction system after depressurization is 262°C, the vacuum is maintained at -0.01Mpa, the vacuum time is 20min, the temperature after vacuum is 268°C, and a polyamide melt is obtained.

[0097] (3) Resin obtained by pelletizing

[...

Embodiment 2

[0111] (1) Under nitrogen conditions, mix 1,5-pentanediamine, adipic acid and water evenly to obtain 80% polyamide salt solution, wherein the salt weighs 20kg; 1,5-pentanediamine and adipic acid The molar ratio is (1-1.05):1, and the pH value of the polyamide salt solution is 7.91 when the concentration of the polyamide salt solution is 10wt.%. The percentage is the mass percentage of the polyamide salt solution.

[0112] (2) Heat the salt solution of polyamide, the pressure in the reaction system rises to 1.7Mpa, exhaust, keep the pressure, the temperature of the reaction system at the end of the pressure keeping is 244°C, and then reduce the pressure to reduce the pressure in the reaction system to 0.01MPa (gauge pressure), the temperature of the reaction system was 264°C after the depressurization was completed, the vacuum was maintained at -0.01Mpa, the vacuum time was 21min, the temperature after vacuum was 269°C, and a polyamide melt was obtained.

[0113] (3) Resin obta...

Embodiment 3

[0118] (1) Under nitrogen conditions, mix 1,5-pentanediamine, adipic acid and water evenly to obtain 80% polyamide salt solution, wherein the salt weighs 20kg; 1,5-pentanediamine and adipic acid The molar ratio is (1-1.05):1, and the pH value of the polyamide salt solution is 7.89 when the concentration of the polyamide salt solution is 10wt.%. The percentage is the mass percentage of the polyamide salt solution.

[0119] (2) Heat the salt solution of polyamide, the pressure in the reaction system rises to 1.7Mpa, exhaust, keep the pressure, the temperature of the reaction system at the end of the pressure keeping is 244°C, and then reduce the pressure to reduce the pressure in the reaction system to 0.01MPa (gauge pressure), the temperature of the reaction system was 264°C after the depressurization, the vacuum was maintained at -0.01Mpa, the vacuum time was 22min, the temperature after vacuum was 269°C, and a polyamide melt was obtained.

[0120] (3) Resin obtained by pellet...

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Abstract

Polyamide 5X resin as well as a preparation method and application thereof are provided by the invention. The polyamide 5X resin not only adopts a bio-based material as a main raw material and is green and environment-friendly, but also has double melting peaks, good mechanical properties and good ductility, and can meet the application of polyamide 5X in the fields of spinning and film drawing. Polyamide 5X fibers prepared from the polyamide 5X resin show good stretchability, the number of broken ends is small, and the spinning efficiency is remarkably improved. In addition, film prepared from the polyamide 5X resin is uniform in thickness and excellent in mechanical property.

Description

technical field [0001] The invention belongs to the field of polyamide materials, and in particular relates to a polyamide 5X resin with double melting peaks and a preparation method and application thereof. Background technique [0002] Polyamide resins represented by nylon 6 and nylon 66 are widely used in clothing, packaging materials, automotive parts, electronic / electrical machine parts, office automation machine parts, In fields such as mechanical parts, building materials and housing-related parts, the field of use has expanded in recent years. [0003] While in packaging materials, films with good extensibility are particularly important in various packaging and packaging applications, such as covering packaged items for transportation and storage. However, when a film is stretched, local deformation can cause large fluctuations in elongation due to non-uniform stretching of the film, resulting in weaker stretch and more elongated non-uniform bands at the same time ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/26C08G69/28D01F6/60C08L77/06C08J5/18
CPCC08G69/26C08G69/28D01F6/60C08J5/18C08J2377/06
Inventor 张强郑毅秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD
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