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

A technology of flame retardant polyamide and composite fiber, applied in the direction of conjugated synthetic polymer rayon, etc., can solve the problem of monotonous melting point, etc., and achieve the effect of good flame retardant effect, little impact on mechanical properties, and lasting flame retardant effect.

Inactive Publication Date: 2017-12-08
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 composite fiber and preparation method thereof
  • A kind of flame-retardant polyamide 6 composite fiber and preparation method thereof
  • A kind of flame-retardant polyamide 6 composite fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A preparation method of flame-retardant polyamide 6 composite fiber, specifically comprising the following steps:

[0050] (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;

[0051] The structure of the flame retardant is:

[0052]

[0053] (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 sp...

Embodiment 2

[0062] A preparation method of flame-retardant polyamide 6 composite fiber, specifically comprising the following steps:

[0063] (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;

[0064] The structure of the flame retardant is:

[0065]

[0066] (2) 88.5 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 s...

Embodiment 3

[0075] A preparation method of flame-retardant polyamide 6 composite fiber, specifically comprising the following steps:

[0076] (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;

[0077] The structure of the flame retardant is:

[0078]

[0079](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 Ex...

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Abstract

The invention relates to a flame-retardant polyamide 6 composite fiber and a preparation method thereof, in particular to a phosphorus-containing reactive flame retardant, which obtains block copolymerized flame-retardant polyamide 6 through continuous and separately carried out two-step polymerization reactions, And it is a method for obtaining flame-retardant polyamide 6 composite fiber by melt composite spinning with fiber-forming polymer. 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. After being pelletized by casting belt, extracted and dried, it is melted and compounded with fiber-forming polymer chips, spun and drawn to obtain flame-retardant polyamide 6 composite fibers. The flame retardant polyamide 6 composite fiber obtained by this method has the characteristics of less flame retardant addition, long-lasting flame retardant effect, fluffy and comfortable hand feeling, and can be made into fabric products, mainly used for filling woolen yarn, blankets, woolen fabrics, and thermal wadding materials, silk fabrics, non-woven fabrics, medical and sanitary products and special work clothes, etc.

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 composite fiber and a preparation method thereof, in particular to a block-copolymerized fiber containing flame-retardant fiber obtained through continuous two-step polymerization. A flame-retardant polyamide 6 composite fiber of an agent prepolymer and a preparation method thereof. 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 belongs to combustible fiber. The research on flame-retardant polyamide 6 composite fiber has become an urgent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/12D01F8/14C08G69/42
Inventor 肖茹刘可李圆圆晏珊王华平王朝生
Owner DONGHUA UNIV
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