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A kind of polyester amide and preparation method thereof

A polyester amide and amide technology, applied in the field of polymer compounds, can solve problems such as easy yellowing, and achieve the effects of low yellow index, optimized performance and wide application range

Active Publication Date: 2022-07-19
CATHAY R&D CENT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defect that the polyester amide in the prior art is easy to yellow during the preparation and storage process, thereby affecting its use, the present invention provides a polyester amide and a preparation method thereof, by optimizing the prepolymerization and polycondensation reaction conditions, effectively It reduces the yellowing of polyester amide during the polymerization process, and the prepared polyester amide has a low yellow index, which is suitable for industrial production and has wide application prospects

Method used

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  • A kind of polyester amide and preparation method thereof
  • A kind of polyester amide and preparation method thereof
  • A kind of polyester amide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthesis of Nylon Salt (PA56 Salt)

[0044] Under nitrogen protection, weigh 3880G of pure water and add it to a 10L reactor, slowly add 1586G of pentamethylenediamine, and then slowly add 2206G of adipic acid. The exotherm is obvious during the feeding process, so ensure that the temperature in the kettle does not exceed 65 °C. Under nitrogen protection, the oil bath was heated to keep the temperature in the kettle at 60° C., and continued stirring to obtain a clear pale yellow salt solution, which was detected with a pH meter (pH was 7.5). After the reaction was completed, the temperature was lowered to separate out the solid, and an appropriate amount of ethanol was added to fully separate out the solid. The precipitated solid was filtered under reduced pressure and washed with cold water to obtain the first white solid product. The first product was dried under vacuum at 80°C for 15 hours to obtain 3350G of white solid PA56 salt.

Embodiment 2

[0046] Synthesis of Nylon Salt (PA66 Salt)

[0047]Under nitrogen protection, weigh 3550G of pure water and add it to a 10L reactor, then add 1657G of hexamethylenediamine, and finally slowly add 2060G of adipic acid. The exotherm is obvious during the feeding process, so ensure that the temperature in the kettle does not exceed 65 °C. Under nitrogen protection, the oil bath was heated to keep the temperature in the kettle at 62°C, and the stirring was continued to obtain a clear pale yellow salt solution. The pH meter was used to detect the salt solution (pH was 7.2). After the reaction was completed, the temperature was lowered to separate out the solid, and an appropriate amount of ethanol was added to fully separate out the solid. The precipitated solid was filtered under reduced pressure and washed with cold water to obtain the first white solid product. The first product was vacuum-dried at 80°C for 15 hours to obtain 3345G of white solid PA66 salt.

Embodiment 3

[0049] Synthesis of Nylon Salt (PA6T Salt)

[0050] Under nitrogen protection, weigh 3950G of pure water and add it to a 10L reactor, then add 1345G of hexamethylenediamine, and finally slowly add 1890G of terephthalic acid (PTA). Under nitrogen protection, the oil bath was heated to keep the temperature in the kettle at 65° C., and continued stirring to obtain a clear pale yellow salt solution, which was detected with a pH meter (pH was 7.5). After the reaction was completed, the temperature was lowered to separate out the solid, and an appropriate amount of ethanol was added to fully separate out the solid. The precipitated solid was filtered under reduced pressure and washed with cold water to obtain the first white solid product. The first product was dried under vacuum at 80°C for 15 hours to obtain 2690G of white solid PA6T salt.

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Abstract

The invention provides a preparation method of polyester amide. By optimizing the reaction conditions of prepolymerization and polycondensation, the yellowing of polyester amide in the polymerization process is effectively reduced, and the prepared polyester amide has a low yellow index and is suitable for industrial production. , has a wide range of application prospects.

Description

technical field [0001] The invention relates to the field of polymer compounds, in particular to a polyester amide material and a preparation method thereof. Background technique [0002] Polyesteramide (PEA) is a polymer compound with ester bonds and amide bonds in the macromolecular chain, and its properties are between polyester (PE) and polyamide (PA), both with polyester fiber properties. High modulus and excellent properties such as abrasion resistance of polyamide fibers. Usually polyamide (commonly known as nylon) is exposed to the atmospheric environment at room temperature or heated up, which is easy to darken, become brittle, and deteriorate in performance, resulting in the phenomenon of polyamide yellowing. The reason for this yellowing phenomenon is mainly due to the degradation of amide bonds to generate terminal amino groups, which are easily oxidized and turn yellow. This yellowing phenomenon often occurs during the polymerization, modification, and product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/44C08G69/26C08L77/12
CPCC08G69/26C08G69/44C08L77/12
Inventor 樊爱龙秦兵兵刘修才
Owner CATHAY R&D CENT CO LTD
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