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Flame-retardant polyamide 66 complex fiber and preparation method thereof

A technology of flame retardant polyamide and composite fiber, which is applied in the field of flame retardant polyamide 66 composite fiber and its preparation, phosphorus-containing reactive flame retardant prepolymer block flame retardant polyamide 66 composite fiber and its preparation field. Solve the problems of restricting the use of polyamide and monotonically decreasing melting point, and achieve the effects of small impact on mechanical properties, long-lasting flame retardant effect, good hand feel and washability

Inactive Publication Date: 2015-11-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also disadvantages in copolymerization flame retardancy. Copolymerization flame retardants are usually distributed randomly in the polymer matrix. For random copolymers, as the content of non-crystalline comonomers (flame retardants) increases, The melting point decreases monotonically, that is to say, with the increase of flame retardant content, the melting point of polymer matrix gradually decreases, which limits the use of polyamide 66

Method used

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  • Flame-retardant polyamide 66 complex fiber and preparation method thereof
  • Flame-retardant polyamide 66 complex fiber and preparation method thereof
  • Flame-retardant polyamide 66 complex fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A preparation method of flame-retardant polyamide 66 composite fiber, specifically comprising the following steps:

[0047] (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 , the reaction ends to generate a flame retardant prepolymer, which is a viscous liquid with a number average molecular weight Mn of 1.8×10 3 , the molar ratio of flame retardant DDP, hexamethylenediamine and water is 1:0.8:2, and the two ends of the obtained flame retardant prepolymer are active end groups of carboxyl and amine groups respectively;

[0048] The structure of the flame retardant is:

[0049]

[0050] (2) 90 parts by mass of 66 salt and 1 part by mass of adipic acid are made into a 60% aqueous solution, mixed evenly and added to the autoclave, and first fed with ...

Embodiment 2

[0058] A preparation method of flame-retardant polyamide 66 composite fiber, specifically comprising the following steps:

[0059] (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 , the reaction ends to generate a flame retardant prepolymer, which is semi-solid, and the 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;

[0060] The structure of the flame retardant is:

[0061]

[0062] (2) 96.8 parts by mass of 66 salt and 0.2 parts by mass of adipic acid are made into an 80% aqueous solution, mixed evenly and added to the autoclave, and first ...

Embodiment 3

[0070] A preparation method of flame-retardant polyamide 66 composite fiber, specifically comprising the following steps:

[0071] (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 , the reaction ends to generate a flame retardant prepolymer, 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, and the two ends of the obtained flame retardant prepolymer are active end groups of carboxyl and amine groups respectively;

[0072] The structure of the flame retardant is:

[0073]

[0074] (2) 91.8 parts by mass of 66 salts and 0.2 parts by mass of adipic acid are made into a 66% aqueous solution, mixed evenly and added to the autoclave,...

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Abstract

The invention relates to a flame-retardant polyamide 66 complex fiber and a preparation method thereof, in particular to a method that a phosphorus-containing reactive type fire retardant is subjected to polymerization reaction to prepare a blocked flame-retardant polyamide 66 copolymer, and the blocked flame-retardant polyamide 66 copolymer is fused with a fiber forming polymer for composite spinning to prepare the flame-retardant polyamide 66 complex fiber. The method is characterized in that firstly, the fire retardant reacts with diamine or dihydric alcohol to obtain a fire retardant prepolymer; secondly, the fire retardant prepolymer reacts with a polyamide 66 prepolymer to obtain the flame-retardant polyamide 66 copolymer; finally, the flame-retardant polyamide 66 copolymer is fused with the fiber forming polymer for composite spinning to prepare the flame-retardant polyamide 66 complex fiber. The flame-retardant polyamide 66 complex fiber prepared by means of the method has the advantages of being lasting in flame-retardant effect, fluffy and comfortable in hand feeling and the like. The flame-retardant polyamide 66 complex fiber can be used in the fields of woolen yarns, woolen blankets, silk fabrics, non-woven fabrics, special working clothes and the like.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant polyamide fiber synthesis, and relates to a flame-retardant polyamide 66 composite fiber and a preparation method thereof, in particular to a phosphorus-containing reactive flame retardant prepolymer block flame-retardant polyamide 66 composite Fibers and methods of making them. Background technique [0002] Polyamide fiber is one of the earliest synthetic fibers put into industrial production in the world, and it is also called nylon in our country. As the earliest industrialized variety of synthetic fiber, polyamide 66 fiber has played a pivotal role in both civil and industrial fields due to its good abrasion resistance, hygroscopicity, resilience, and dyeability. However, the limiting oxygen index of polyamide 66 fiber is only 21-23%, and its flame retardancy is poor, which seriously limits its application. Therefore, the research on flame retardant polyamide 66 fiber has become a hot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/12D01F8/14D01F8/06C08G69/42
Inventor 肖茹李圆圆刘可张珍珍陆建伟王华平
Owner DONGHUA UNIV
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