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Polyester amide and preparation method thereof

A technology of polyester amide and amide, which is applied in the field of polymer compounds, can solve problems such as easy yellowing, and achieve the effects of low yellowness index, wide application range, and simple preparation process

Active Publication Date: 2019-07-02
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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  • Polyester amide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthesis of Nylon Salt (PA56 Salt)

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

Embodiment 2

[0046] Synthesis of Nylon Salt (PA66 Salt)

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

Embodiment 3

[0049] Synthesis of Nylon Salt (PA6T Salt)

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

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Abstract

The invention provides a preparation method of a polyester amide. According to the method, by optimizing the pre-polymerization and polycondensation reaction conditions, the yellowing of the polyesteramide in the polymerization process is effectively reduced, and the yellow index of the prepared polyester amide is low, so that the polyester amide is suitable for industrialized production and haswide application prospect.

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 macromolecular compound with ester bonds and amide bonds on the macromolecular chain. Its properties are between polyester (PE) and polyamide (PA). High modulus, but also has excellent properties such as polyamide fiber wear resistance. Usually polyamide (commonly known as nylon) is exposed to room temperature atmosphere or heat up, it is easy to darken, become brittle, performance decline, and polyamide yellowing occurs. The reason for this yellowing phenomenon is mainly due to the degradation of amide bonds to produce terminal amino groups, which are easily oxidized and turn yellow. This yellowing phenomenon often occurs during the polymerization, modification and product processing of polyamide. [0003] In the polymerization production process, there are usu...

Claims

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Application Information

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Patent Type & Authority Applications(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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