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A kind of flame-retardant polyamide 6 fiber and preparation method thereof

A technology for flame retardant polyamide and polyamide, applied in the direction of single-component copolyamide rayon, melt spinning, etc., can solve problems such as monotonous melting point and limitation, achieve good flame retardant effect, maintain service performance, good Effect of hand feel and washability

Inactive Publication Date: 2018-01-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also shortcomings in the flame retardant modification of copolymerization. Usually, the flame retardant modification of copolymerization is to directly polymerize the monomers of the flame retardant and the polyamide to obtain a random copolymer of the polyamide and the flame retardant. The flame retardant is an important component in the polyamide. Randomly distributed, for random copolymers, as the content of non-crystalline comonomer (flame retardant) increases, the melting point decreases monotonically. 6 fiber, but also need to maintain the high temperature performance of polyamide 6 fiber, which limits the use of polyamide 6 fiber

Method used

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  • A kind of flame-retardant polyamide 6 fiber and preparation method thereof
  • A kind of flame-retardant polyamide 6 fiber and preparation method thereof
  • A kind of flame-retardant polyamide 6 fiber and preparation method thereof

Examples

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Effect test

Embodiment 1

[0043] A preparation method for flame-retardant polyamide 6 fibers, specifically comprising the following steps:

[0044] (1) Mix the flame retardant DDP, hexamethylenediamine and water, mix evenly at 50°C for 2 hours under the protection of nitrogen, then stir and react at 90°C for 2 hours, then raise the temperature to 150°C for further polymerization, and finally decompress and vacuumize, and react Finish generating flame retardant prepolymer, it is viscous liquid, number average molecular weight Mn is 1.8×10 3 , the molar ratio of flame retardant DDP, hexamethylenediamine and water is 1:1.1:2, and the two ends of the obtained flame retardant prepolymer are active end groups of carboxyl and amine groups respectively;

[0045] The structure of the flame retardant is:

[0046]

[0047] (2) 90.7 parts by mass of caprolactam, 4.0 parts by mass of water and 0.3 parts by mass of adipic acid are added to the reactor, and N 2 Exhaust the air in the kettle, stir at a speed of 2...

Embodiment 2

[0057] A preparation method for flame-retardant polyamide 6 fibers, specifically comprising the following steps:

[0058] (1) Mix the flame retardant CEPPA, hexamethylenediamine and water, mix evenly at 80°C for 3 hours under the protection of nitrogen, then stir and react at 130°C for 3 hours, then raise the temperature to 180°C for further polymerization, and finally decompress and vacuumize, react Finish generating flame retardant prepolymer, it is semi-solid, number average molecular weight Mn is 2.5 * 10 3 , the molar ratio of flame retardant CEPPA, hexamethylenediamine and water is 1:1.2:2.5, and the two ends of the obtained flame retardant prepolymer are active end groups of carboxyl and amine groups respectively;

[0059] The structure of the flame retardant is:

[0060]

[0061] (2) 88.0 parts by mass of caprolactam, 1.5 parts by mass of water and 0.5 parts by mass of adipic acid are added to the reactor, and N 2 Exhaust the air in the kettle, stir at a speed of ...

Embodiment 3

[0071] A preparation method for flame-retardant polyamide 6 fibers, specifically comprising the following steps:

[0072] (1) Mix the flame retardant BCPPO, hexamethylenediamine and water, mix evenly at 60°C for 2.5 hours under the protection of nitrogen, then stir and react at 95°C for 2 hours, then raise the temperature to 160°C for further polymerization, and finally vacuumize under reduced pressure, At the end of the reaction, a flame retardant prepolymer is generated, which is a viscous liquid with a number average molecular weight Mn of 2.8×10 3 , the molar ratio of flame retardant BCPPO, hexamethylenediamine and water is 1:1.2:2.1, and the two ends of the obtained flame retardant prepolymer are active end groups of carboxyl and amine groups respectively;

[0073] The structure of the flame retardant is:

[0074]

[0075] (2) 92.9 parts by mass of caprolactam, 0.8 parts by mass of water and 0.8 parts by mass of adipic acid are added to the reactor, and N 2 Exhaust t...

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Abstract

The present invention relates to a flame-retardant polyamide 6 fiber and a preparation method thereof, in particular to a phosphorus-containing reactive flame retardant, which is obtained by block copolymerization of flame-retardant polyamide 6 fiber through continuous and separately carried out two-step polymerization reactions method. It is characterized in that firstly the flame retardant reacts with diamine or glycol to obtain a flame retardant prepolymer, and then the flame retardant prepolymer reacts with the polyamide 6 prepolymer to obtain a flame retardant polyamide 6 material. Flame-retardant polyamide 6 fibers are obtained by casting belt pelletizing, extracting and drying, and drawing after melt spinning. The flame-retardant polyamide 6 fiber obtained by the method has the characteristics of less addition of flame retardant and long-lasting flame-retardant effect, and the limiting oxygen index is above 30%. The flame-retardant polyamide 6 fiber is made into fabric products and can be widely used in The field of civilian filament and industrial filament.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant polyamide fiber synthesis, and relates to a flame-retardant polyamide 6 fiber and a preparation method thereof, in particular to a block-copolymerized fiber containing flame retardant obtained through continuous and separately carried out two-step polymerization reactions. Prepolymer flame-retardant polyamide 6 fiber and its preparation method. Background technique [0002] Polyamide fiber is called nylon in our country, and it is also called nylon, nylon, capron and so on abroad. As the earliest industrialized variety of synthetic fiber, polyamide 6 fiber has played a pivotal role in civil and industrial fields due to its excellent strength, wear resistance, hygroscopicity, and resilience. However, the limiting oxygen index of polyamide 6 fiber is only about 21%, which is a combustible fiber. The research on flame-retardant polyamide 6 fiber has become an urgent problem to be solved. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/80D01F6/82D01D5/08
Inventor 刘可肖茹李圆圆储贻健王朝生王华平
Owner DONGHUA UNIV
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