Spinnable polyamide as well as preparation method and product thereof

A technology of polyamide and aliphatic polyamide, which is applied in the field of spinnable polyamide and its preparation, can solve the problems of low melt thermal stability, low production rate, poor spinnability, etc., and can reduce the evenness rate , The effect of reducing the preparation cost and good fluidity

Pending Publication Date: 2022-03-22
CHINA CHEM TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the melt thermal stability of polyamide 66 fiber and polyamide 56 fiber is relatively low, so the spinnability of polyamide 66 fiber and polyamide 56 fiber is relatively poor, especially for fine denier yarn (linear density between 200-700dtex) during the preparation process, problems such as broken wires often occur, resulting in a relatively low production rate and increased manufacturing costs
For example: in the preparation of civil fibers, the process of making fibers from polyamide 66 chips is more than 10,000 yuan per ton higher than that of polyamide 6. Although polyamide 56 has a certain improvement in spinnability, the manufacturing cost is still relatively high

Method used

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  • Spinnable polyamide as well as preparation method and product thereof
  • Spinnable polyamide as well as preparation method and product thereof
  • Spinnable polyamide as well as preparation method and product thereof

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preparation example Construction

[0045] The preparation method of an exemplary embodiment of the present disclosure includes: using a spinnable polyamide monomer as a reaction base material, and preparing a spinnable polyamide by polymerization; wherein, before the end of the polymerization reaction, at least mixing the reaction base material with at least one A mixture of ionic compounds.

[0046] The inventors found that by adding the ionic compound of the present disclosure during the preparation of the aliphatic polyamide, the ionic compound can be fully and uniformly mixed with the molecular chains of the aliphatic polyamide without agglomeration. The uniformly dispersed ionic compound can enhance the aliphatic polyamide and enhance the spinnability of the dimonomer aliphatic polyamide, and reduce the number of yarn breakages of the dimonomer aliphatic polyamide during spinning. However, when the spinnable polyamide comprising dimonomer aliphatic polyamide is directly blended with the disclosed ionic com...

Embodiment 1

[0086] A kind of spinnable polyamide, its preparation method comprises:

[0087] S1. Salt forming section: Replace the air in the 20-liter polymerization kettle by vacuuming and filling nitrogen three times, and protect it with nitrogen, add 6kg of pure water, then add 2.66kg of hexamethylenediamine, start stirring, and add 3.34kg Adipic acid was used to prepare nylon salt solution, and the pH value of the nylon salt solution was adjusted to 10% concentration with a small amount of hexamethylenediamine or adipic acid. When the pH value was 7.85, 30 g of ionic compound 1 and 30 g of ionic compound 4 were added.

[0088] S2. Pre-polymerization section: Gradually raise the temperature of the 20-liter oil bath of the polymerization tank to 290°C, wait for the pressure inside the tank to rise to 1.8Mpa, start exhausting, and continue to heat up. When the temperature of the system reaches 242°C, it is gradually reduced to normal pressure. The process control is completed within 3 h...

Embodiment 2

[0092] A kind of spinnable polyamide, its preparation method comprises:

[0093] S1. Salt forming section: replace the air in the 20-liter polymerization kettle by vacuuming and filling nitrogen three times, and protect it with nitrogen, add 2.57kg of pure water, then add 2.66kg of hexamethylenediamine, start stirring, add 3.34 kg adipic acid to prepare the nylon salt solution, adjust the pH value of the nylon salt solution to 10% concentration with a small amount of hexamethylenediamine or adipic acid, and then add 1.2 g of sodium hypophosphite.

[0094] S2. Pre-polymerization section: gradually raise the temperature of the 20-liter oil bath of the polymerization tank to 300°C, wait until the pressure in the tank rises to 2.5Mpa, then add 6g of ionic compound 2, start to exhaust, and continue to heat up. When the temperature of the system reaches 245°C, it is gradually reduced to normal pressure. The process control is completed within 6 hours.

[0095] S3. Final polymeriza...

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Abstract

The invention provides spinnable polyamide as well as a preparation method and a product thereof, relates to the technical field of materials, and aims to improve the spinnability of aliphatic polyamide, particularly double-monomer aliphatic polyamide, and reduce the manufacturing cost of fine denier filaments containing the double-monomer polyamide. The spinnable polyamide contains aliphatic polyamide, an ionic compound which is uniformly dispersed is contained in the spinnable polyamide, and the ionic compound contains cations including at least one or more of heterocyclic cations and heterochain cations; heteroatoms contained in the heterocyclic cations and the heterochain cations are one of N, P and S. The preparation method is used for preparing spinnable polyamide. Spinnable polyamides of the present disclosure are useful in the field of materials

Description

technical field [0001] The disclosure relates to the field of material technology, in particular to a spinnable polyamide, a preparation method and a product thereof. Background technique [0002] Compared with polyamide 6 fiber, commonly used double-monomer polyamide fiber, such as polyamide 66 fiber, polyamide 56 fiber, etc., has the advantages of good heat resistance, softness and smoothness, and has a good market prospect. [0003] However, the melt thermal stability of polyamide 66 fiber and polyamide 56 fiber is relatively low, so the spinnability of polyamide 66 fiber and polyamide 56 fiber is relatively poor, especially for fine denier yarn (linear density between 200-700dtex) during the preparation process, problems such as broken filaments often occur, resulting in a relatively low manufacturing rate and increased manufacturing costs. For example: in the preparation of civil fibers, the process of making fibers from polyamide 66 chips is more than 10,000 yuan per ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K5/42C08K5/50C08K5/3432C08K5/521D01F6/90D01F1/10
CPCC08K5/42C08K5/50C08K5/3432C08K5/521D01F6/90D01F1/10C08L77/06
Inventor 郑毅侯春曰邓兆敬马冬清王文宸郭详
Owner CHINA CHEM TECH RES INST
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