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Preparation method of flame-retarding nylon 610 and toothbrush hair produced therefrom

A technology of flame retardant nylon and flame retardant, used in brushes, bristles, one-component polyamide rayon, etc.

Inactive Publication Date: 2015-11-11
淮安市欣佳尼龙有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the reported data, the flame retardancy of toothbrush filaments is not involved, resulting in flammable hidden dangers in the production, storage and use of toothbrush filaments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First, in the autoclave, 36.5g of hexamethylenediamine and 63.5g of sebacic acid were neutralized into an aqueous amide salt solution with a solid content of 60%, and then 5.0g of bis(4-carboxyphenyl)phenylphosphine oxide was added, 0.06 g sodium carbonate, 0.07 g stannous octoate, the temperature of the reaction system was raised to 224 °C, the pressure was 1.3 MPa, and the pressure was maintained for 3 hours; then the temperature was raised to 258 °C, dehydrated, and lowered to normal temperature and pressure to obtain flame-retardant nylon 610. According to the conventional method, the flame-retardant nylon 610 is spun to obtain the flame-retardant nylon 610 toothbrush filament. The oxygen index of the flame-retardant nylon 610 toothbrush filament is 27.1%, and the wear rate is 0.35×10 -6 mm 3 / Nm.

Embodiment 2

[0023] First, in the autoclave, 36.5g of hexamethylenediamine and 63.5g of sebacic acid were neutralized into an aqueous amide salt solution with a solid content of 60%, and then 7.5g of bis(4-hydroxyphenyl)phenylphosphine oxide was added, 0.20 g sodium bicarbonate, 0.12g dibutyltin dilaurate, the temperature of the reaction system is raised to 232°C, the pressure is 1.4MPa, and the pressure is maintained for 2.5h; then the temperature is raised to 250°C, dehydrated, and lowered to normal temperature and pressure to obtain a flame-retardant nylon 610. According to the conventional method, the flame-retardant nylon 610 is spun to obtain the flame-retardant nylon 610 toothbrush filament. The oxygen index of the flame-retardant nylon 610 toothbrush filament is 27.5%, and the wear rate is 0.31×10 -6 mm 3 / Nm.

Embodiment 3

[0025] Firstly, 36.5g of hexamethylenediamine and 63.5g of sebacic acid were neutralized into an aqueous amide salt solution with a solid content of 60% in an autoclave, and then 10g of 4-hydroxydiphenylphosphine oxide, 0.48g of trisodium phosphate, 0.19 g stannous chloride, the temperature of the reaction system was raised to 255°C, the pressure was 1.7MPa, and the pressure was maintained for 1.2h; then the temperature was raised to 258°C, while dehydration was carried out, and the flame-retardant nylon 610 was obtained. According to the conventional method, the flame-retardant nylon 610 is spun to obtain the flame-retardant nylon 610 toothbrush filament. The oxygen index of the flame-retardant nylon 610 toothbrush filament is 27.7%, and the wear rate is 0.28×10 -6 mm 3 / Nm.

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Abstract

The invention discloses a preparation method of flame-retarding nylon 610 and toothbrush hairs produced therefrom. The flame-retarding nylon 610 is prepared by mixing and neutralizing sebacic acid with hexamethylendiamine to form amide salt, dissolving the amide salt in water to obtain an amide salt water solution, adding successively a reactive flame retardant, a catalyst and an antioxidant to the reaction system, increasing the temperature and pressure of the reaction system, continuously carrying out the reaction, performing dehydration when the reaction is finished, and reducing the temperature to room temperature and the pressure to normal pressure to obtain the flame-retarding nylon 610. The flame-retarding nylon 610 is subjected to spinning to produce the flame-retarding nylon 610 toothbrush hairs. The preparation method of the flame-retarding nylon 610 is simple in processes and is low in cost. The flame-retarding nylon 610 is prepared under a high pressure, so that the moulding period is effectively reduced and production efficiency is increased. The flame-retarding nylon 610 is good in stability, is free of toxin, is good in flame retarding performance, and can eliminate the inflammable hidden danger during production, storage and use processes of toothbrush hairs.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a method for preparing flame-retardant nylon 610 and toothbrush filaments prepared with the flame-retardant nylon 610. Background technique [0002] Polyamide, commonly known as nylon, has developed into the world's most diverse and widely used engineering plastics since it was launched by DuPont in 1930, and its total output ranks first in the world's engineering plastics. The main varieties are: Nylon-6, Nylon-66, Nylon-610, Nylon-12, Nylon-1010, Nylon-43, etc. At present, nylon 610 can prolong the service life of the toothbrush due to its moderate rigidity and good anti-linting performance. Therefore, nylon 610 resin gradually replaces nylon 66 and nylon 1010 resin, and is more and more used in the manufacture of toothbrush filaments. However, toothbrush filaments are generally not flame retardant and have a low oxygen index. For example, the invention patent wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/42D01F6/90A46D1/00
Inventor 项尚林袁小华颜惠茹陈曦井建林
Owner 淮安市欣佳尼龙有限公司
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