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Polyamide 5X resin capable of rapidly crystallizing and preparation method thereof

A technology of polyamide resin and polyamide, which is applied in the field of rapid crystallization and molding of polyamide 5X and its preparation, can solve the problems of time-consuming and labor-intensive, and achieve the effects of suppressing the greenhouse effect, increasing production, and improving surface gloss

Active Publication Date: 2020-08-11
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 often time-consuming and labor-intensive problems in post-modification, so the invention of this patent attempts to add a nucleating agent during the polymerization of polyamide 5X to improve the crystallization performance of polyamide 5X, thereby solving the problem of time-consuming and labor-intensive post-modification, and hopes to obtain Resin with fast crystallization rate and good mechanical properties

Method used

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  • Polyamide 5X resin capable of rapidly crystallizing and preparation method thereof
  • Polyamide 5X resin capable of rapidly crystallizing and preparation method thereof
  • Polyamide 5X resin capable of rapidly crystallizing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Under nitrogen, mix 1,5-pentanediamine, adipic acid and water evenly to obtain a 70% 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 7.96 when the concentration of the polyamide salt solution is 10wt.%. The percentage is the mass percentage of the polyamide salt solution.

[0064] (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 was 262° C. after the end of depressurization.

[0065] (3) 1.6g nucleating agent P200 (Bruggmann, analytically pure) is configured into 5wt.% aqueous suspension and is added in the reactor through the feeding port, and the a...

Embodiment 2

[0070] (1) Under nitrogen, mix 1,5-pentanediamine, adipic acid and water evenly to obtain a 72% 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 7.98 when the concentration of the polyamide salt solution is 10wt.%. The percentage is the mass percentage of the polyamide salt solution.

[0071] (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 248°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 end of depressurization.

[0072] (3) 1.6g nucleating agent P200 (Bruggmann, analytically pure) is configured into 5wt.% aqueous suspension and is added in the reactor through the feeding port, and the a...

Embodiment 3

[0076] (1) Under nitrogen, mix 1,5-pentanediamine, adipic acid and water evenly to obtain a 70% 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 7.96 when the concentration of the polyamide salt solution is 10wt.%. The percentage is the mass percentage of the polyamide salt solution.

[0077] (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 was 262° C. after the end of depressurization.

[0078] (3) 1.0g of nucleating agent P200 (Bruggmann, analytically pure) is configured into 5wt.% water suspension and added in the reactor through the feeding port, and the add...

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Abstract

The invention discloses polyamide 5X resin capable of rapidly crystallizing and molded and a preparation method thereof. The polyamide 5X resin has good mechanical properties and rapid crystallizationproperties. According to the invention, the nucleating agent is added in the polymerization process, and the nucleating agent is dispersed in the whole PA5X resin to accelerate the rate and the crystallinity of PA5X cooling crystallization so that the PA5X is short in processing cycle time and higher in crystallinity. Compared with addition in the later modification process, addition in polymerization has the advantages of small addition amount and better and more obvious crystallization effect, the production cost can be reduced, and the production applicability is excellent.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a rapidly crystallized polyamide 5X and a preparation method thereof. Background technique [0002] Polyamides are often used in automotive parts, parts of electrical and electronic equipment, and many other applications due to their excellent mechanical properties and formability. [0003] Polyamide 5X is a new type of polyamide, and its research is still in its infancy in the prior art. Due to its various properties are different from existing polyamides, the preparation and application process cannot be copied from the original set. [0004] For example, the polyamide PA5X prepared by polymerization has poor heat resistance, slow crystallization rate, low crystallinity, long molding cycle through injection molding process, and poor mechanical properties. [0005] At present, the commonly used method to accelerate the crystallization rate of polyamide is to add nuc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/26C08G69/28C08L77/06
CPCC08G69/26C08G69/28C08L77/06
Inventor 张强秦兵兵白林涛刘修才
Owner CATHAY R&D CENT CO LTD
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