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Flame-retardant nylon 6 fiber and preparation method thereof

A flame-retardant nylon and fiber technology, which is applied in the manufacture of fire-retardant and flame-retardant filaments, single-component polyamide rayon, and single-component copolyamide rayon, etc. Problems such as melting and dripping, to achieve the effect of high Young's modulus, high hygroscopicity, and high elongation at break

Pending Publication Date: 2021-11-19
RUINAI COMPOSITE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nylon fiber is one of the varieties with excellent performance and wide range of uses in synthetic fibers. It not only has corrosion resistance, mildew resistance, high wet strength, no fear of insects, low moisture absorption rate, but also has high breaking strength, elasticity, and fiber elongation recovery. However, there is a large gap between the flame retardant performance of nylon 6 and the actual use requirements, and the large difference between the melting temperature of nylon fabric and the ignition point temperature makes the fabric easy to shrink and melt when it is burned. dripping, thus causing greater harm, very dangerous in practical applications

Method used

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  • Flame-retardant nylon 6 fiber and preparation method thereof
  • Flame-retardant nylon 6 fiber and preparation method thereof
  • Flame-retardant nylon 6 fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A preparation method of flame retardant shown in formula I, comprising,

[0065] Add cyanuric chloride and sulfallic acid to petroleum ether at 78°C at the same rate, the dosage ratio of cyanuric chloride, sulfallic acid and petroleum ether is 1mol:3.4mol:150mL, continue to react to the pH value after the dropwise addition Keep the pH at 9 during the reaction, cool, concentrate under reduced pressure, add 8 times the volume of absolute ethanol, filter with suction, wash the filter cake with a methanol / chloroform mixture with a volume ratio of 1:0.8, and dry it to obtain Flame retardant shown in formula I, productive rate is 86.37%.

[0066] Formula I

[0067] The flame retardant shown in formula I is characterized by proton nuclear magnetic resonance spectrum, 1 H-NMR (300MHz, DMSO-d 6 ) δ: 11.34(s, 3H, COOH), 7.53-8.49 (s, 9H, Ph-H), 4.18(d, 6H, Ph-CH 2 ), 1.86(s, 3H,S-OH).

[0068] A preparation method of flame-retardant nylon 6 fiber, comprising,

[0069] Ste...

Embodiment 2

[0077] A preparation method of a flame retardant shown in formula I is the same as in Example 1.

[0078] A kind of preparation method of flame-retardant nylon 6 fiber, the difference with embodiment 1 is:

[0079] The dosage ratio of caprolactam, flame retardant shown in formula I, deionized water and 6-aminocaproic acid is 100g:0.6g:7.8g:0.78g.

Embodiment 3

[0081] A preparation method of a flame retardant shown in formula I is the same as in Example 1.

[0082] A kind of preparation method of flame-retardant nylon 6 fiber, the difference with embodiment 1 is:

[0083] The dosage ratio of caprolactam, flame retardant shown in formula I, deionized water and 6-aminocaproic acid is 100g:2.5g:7.8g:0.78g.

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Abstract

The invention discloses a flame-retardant nylon 6 fiber and a preparation method thereof, and belongs to the technical field of functional fibers. The preparation method of the flame-retardant nylon 6 fiber comprises the steps: 1, reacting caprolactam, a flame retardant represented by the formula I, deionized water and 6-aminocaproic acid in a reaction device, to obtain flame-retardant nylon 6; and 2, drying the flame-retardant nylon 6, and performing melt spinning to obtain flame-retardant nylon 6 fiber, wherein the formula I is described in the specification. According to the preparation method disclosed by the invention, the caprolactam and the flame retardant represented by the formula I are subjected to in-situ polymerization to obtain the flame-retardant nylon 6, so that the flame retardant can be uniformly dispersed in the flame-retardant nylon 6, and the spinnability, the flame retardance, the thermal stability, the mechanical property and the hygroscopicity of the flame-retardant nylon 6 are improved.

Description

technical field [0001] The invention belongs to the technical field of functional fibers, and in particular relates to a flame-retardant nylon 6 fiber and a preparation method thereof. Background technique [0002] Nylon 6 (PA6), the trade name is nylon 6, and the structural formula is -NH(CH 2 ) 5 CO-, first industrialized by Farben in 1943. Nylon 6 is a translucent crystalline polymer with a density of 1.13-1.15g / cm 3 , the melting point is 215-220°C, and the thermal decomposition temperature is greater than 300°C. Nylon fiber is one of the varieties with excellent performance and wide range of uses in synthetic fibers. It not only has corrosion resistance, mildew resistance, high wet strength, no fear of insects, low moisture absorption rate, but also has high breaking strength, elasticity, and fiber elongation recovery. However, there is a large gap between the flame retardant performance of nylon 6 and the actual use requirements, and the large difference between th...

Claims

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Application Information

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IPC IPC(8): C07D251/24C08G69/42D01F6/80D01F6/90D01F1/07
CPCC07D251/24C08G69/42D01F6/80D01F6/90D01F1/07
Inventor 林俊良
Owner RUINAI COMPOSITE MATERIAL
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