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Semi-aromatic polyamide copolymer and preparation thereof

A semi-aromatic polyamide technology, applied in the field of semi-aromatic polyamide copolymers and its preparation, can solve the problems of poor processability and high melting point

Pending Publication Date: 2021-07-23
上海庚彩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

Fully aromatic polyamides are a class of polymers in which amide groups and benzene rings are connected to each other. Among them, its melting point is too high to make its processing performance poor

Method used

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  • Semi-aromatic polyamide copolymer and preparation thereof
  • Semi-aromatic polyamide copolymer and preparation thereof
  • Semi-aromatic polyamide copolymer and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A semi-aromatic polyamide copolymer obtained by polycondensation after mixing nylon salt Ⅰ and nylon salt Ⅱ in proportion. The degree of polymerization is 50-200. Hexamethylene adipamide salt is prepared by the following steps:

[0078] (1) Add 15kg of distilled water and 7.3070kg of adipic acid into the salt forming kettle, start stirring and raise the temperature to 80°C, replace nitrogen, and slowly add p-xylylenediamine dropwise until the adipic acid is completely dissolved until pH=7~7.5 , continue to react after 1 hour and stop to obtain a total of 29.1165 kg of adipyl p-xylylenediamine salt solution. After cooling, suction filter and dry to obtain 12.3145 kg of adipyl p-xylylenediamine salt for subsequent use.

[0079] (2) Add 15kg of distilled water and 7.3070kg of adipic acid into the salt forming kettle, start stirring and raise the temperature to 75°C, replace the nitrogen, and slowly add hexamethylenediamine dropwise until the adipic acid is completely disso...

Embodiment 2

[0082] A semi-aromatic polyamide copolymer obtained by polycondensation after mixing nylon salt Ⅰ and nylon salt Ⅱ in proportion. The degree of polymerization is 50-200. Hexamethylene adipamide salt is prepared by the following steps:

[0083] (1) Add 15kg of distilled water and 7.3070kg of adipic acid into the salt forming kettle, start stirring and raise the temperature to 80°C, replace nitrogen, and slowly add p-xylylenediamine dropwise until the adipic acid is completely dissolved until pH=7~7.5 , continue to react after 1 hour and stop to obtain a total of 29.1165 kg of adipyl p-xylylenediamine salt solution. After cooling, suction filter and dry to obtain 12.3145 kg of adipyl p-xylylenediamine salt for subsequent use.

[0084] (2) Add 15kg of distilled water and 7.3070kg of adipic acid into the salt forming kettle, start stirring and raise the temperature to 75°C, replace the nitrogen, and slowly add hexamethylenediamine dropwise until the adipic acid is completely disso...

Embodiment 3

[0087] A semi-aromatic polyamide copolymer obtained by polycondensation after mixing nylon salt Ⅰ and nylon salt Ⅱ in proportion. The degree of polymerization is 50-200. Hexamethylene adipamide salt is prepared by the following steps:

[0088](1) Add 15kg of distilled water and 7.3070kg of adipic acid into the salt forming kettle, start stirring and raise the temperature to 80°C, replace nitrogen, and slowly add p-xylylenediamine dropwise until the adipic acid is completely dissolved until pH=7~7.5 , continue to react after 1 hour and stop to obtain a total of 29.1165 kg of adipyl p-xylylenediamine salt solution. After cooling, suction filter and dry to obtain 12.3145 kg of adipyl p-xylylenediamine salt for subsequent use.

[0089] (2) Add 15kg of distilled water and 7.3070kg of adipic acid into the salt forming kettle, start stirring and raise the temperature to 75°C, replace the nitrogen, and slowly add hexamethylenediamine dropwise until the adipic acid is completely dissol...

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Abstract

The invention relates to a semi-aromatic polyamide copolymer and a preparation method thereof. The preparation method comprises the steps of salt forming of nylon salt I, salt forming of nylon salt II and polycondensation of the nylon salt I and the nylon salt II, wherein the nylon salt I is adipyl p-xylylenediamine salt. The polycondensation process specifically comprises the steps: placing the nylon salt I and the nylon salt II in a polymerization kettle to be mixed; adding an auxiliary agent and water, stirring, replacing nitrogen, sealing, heating, carrying out high-temperature and high-pressure reaction, exhausting, vacuumizing, carrying out high-temperature and low-pressure reaction, and cooling to normal temperature to obtain the semi-aromatic polyamide copolymer. Compared with the prior art, the semi-aromatic polyamide copolymer prepared by the invention has the characteristics of high mechanical strength, low water absorption, high temperature resistance, high barrier property, high dimensional stability, good mechanical property, high processability and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a semi-aromatic polyamide copolymer and its preparation. Background technique [0002] Polyamide is widely used in various fields such as clothing fibers, engineering plastics, films, electronic and electrical components, etc. Among them, PA6 and PA66 are easy to process, low cost, easy to obtain raw materials, good toughness, high tensile strength, chemical resistance, and With advantages such as abrasive resistance and wrinkle resistance, they have become the two polyamides with the highest production capacity in industrial production. At the same time, PA6 and PA66 also have disadvantages such as poor heat resistance, poor dimensional stability, and poor barrier properties, so the use in many application fields is limited by the degree of mobility. [0003] In order to solve the above-mentioned problem of limited application of polyamides such as PA6 and...

Claims

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Application Information

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IPC IPC(8): C08G69/28
CPCC08G69/265C08G69/28
Inventor 李修函杨韶辉王贤丰孙宇露张明晖
Owner 上海庚彩新材料科技有限公司
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