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Anionic polyelectrolyte and nylon fabric after-finish flame retarding method

A technology of polyelectrolyte and nylon fabric, which can be used in fiber processing, textiles and papermaking, and can solve the problems of poor durability and low flame retardant efficiency of polymer electrolytes.

Active Publication Date: 2015-12-23
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also has some disadvantages. The flame retardant efficiency of commonly used polymer electrolytes is usually low; the electrostatic adsorption and other forces existing between the assembled layers have poor durability in the presence of ionic detergents.

Method used

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  • Anionic polyelectrolyte and nylon fabric after-finish flame retarding method
  • Anionic polyelectrolyte and nylon fabric after-finish flame retarding method
  • Anionic polyelectrolyte and nylon fabric after-finish flame retarding method

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preparation example Construction

[0075] The present invention also provides a method for preparing the above-mentioned anionic polyelectrolyte, comprising: combining hypophosphorous acid raw materials with R 1 =O, H-R 2 -H, POM and Cl-R 3 -One or more reactions in Cl to obtain anion polyelectrolyte; the hypophosphorous acid raw material is hypophosphorous acid and / or hypophosphite salt.

[0076] where the R 1 , R 2 with R 3 All are the same as above, and will not be repeated here.

[0077] According to the invention, it is preferred to combine hypophosphorous acid and / or hypophosphite with R 1 =O, H-R 2 -H reaction to obtain anionic polyelectrolyte, or hypophosphorous acid and / or hypophosphite with polyoxymethylene, Cl-R 3 -Cl reaction to obtain anionic polyelectrolyte.

[0078] When hypophosphorous acid and / or hypophosphite with R 1 =O, H-R 2 When -H reacts, its reaction chemical formula is as follows:

[0079]

[0080] When hypophosphorous acid and / or hypophosphite and polyoxymethylene, Cl-R ...

Embodiment 1

[0096] 1.1 Add 70.0g of sodium hypophosphite, 36.0g of paraformaldehyde, 300ml of deionized water and 20ml of hydrochloric acid into the reaction kettle, turn on the mechanical stirring and raise the reaction temperature to 90°C, keep it warm and react for 24h, then obtain a white color by rotary evaporation The solid product is sodium hydroxymethyl hypophosphite.

[0097] 1.2 Add 13g of sodium hydroxymethyl hypophosphite obtained in 1.1, 13g of itaconic acid, 20g of phenylphosphonic dichloride, 20ml of deionized water and 150ml of acetonitrile into the reactor, turn on mechanical stirring and raise the reaction temperature to 80 °C, condense and reflux to discharge the hydrogen chloride produced in the reaction, keep warm and react for 6h, then obtain the product by rotary evaporation, wash with ether to remove impurities, and dry to obtain a white solid product, which is an anionic polyelectrolyte. The chemical reaction formula is as follows:

[0098]

[0099] Among them,...

Embodiment 2

[0102] Add 20.0g of chitosan, 12.0g of phenylphosphonic dichloride, 4.4g of acrylic acid, 10.0g of triethylamine and 300ml of acetonitrile into the reaction kettle, turn on the mechanical stirring and raise the temperature to 60°C, keep warm and react for 12h, then rotate evaporate and wash , filtered, and dried to obtain a yellow solid product, which is modified chitosan.

[0103] Utilize infrared spectrum to analyze chitosan and modified chitosan in embodiment 2, obtain its infrared spectrum figure such as figure 2 Shown, wherein A is modified chitosan, B is chitosan. By comparing the spectra of chitosan and modified chitosan, it can be found that 1631cm -1 and 2972cm -1 The peaks at correspond to the characteristic peaks of the double bond and the methylene connected to it, indicating that acrylic acid has been grafted onto the chitosan structure through phenylphosphonyl dichloride.

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Abstract

The invention provides an anionic polyelectrolyte and a nylon fabric after-finish flame retarding method. The after-finish flame retarding method comprises the following steps: carrying out surface modification on the nylon fabric; alternately immersing the surface-modified nylon fabric in an anionic polyelectrolyte solution and a cationic polyelectrolyte solution to form a flame-retardant coating, thereby obtaining a flame-retardant-coating-containing nylon fabric; and carrying out crosslinking treatment on the flame-retardant-coating-containing nylon fabric to form the flame-retardant coating. Compared with the prior art, layer-by-layer self-assembly is utilized to construct the flame-retardant coating under the acting force of static electricity; and the introduced polyelectrolyte structure contains phosphorus, nitrogen, sulfur and many other flame-retardant elements, thereby displaying the synergistic effects among the multiple flame-retardant elements and enhancing the flame retardancy of the nylon fabric. The crosslinking treatment is performed to enhance the durability of the flame-retardant coating of the nylon fabric. The method has the advantages of simple production technique, low requirements for technical equipment and mild treatment conditions, and satisfies the requirements for greenness and environment friendliness.

Description

technical field [0001] The invention belongs to the technical field of post-finishing flame retardant, and in particular relates to an anionic polyelectrolyte and a post-finishing flame-retardant method for nylon fabrics. Background technique [0002] Nylon fiber has also become nylon in our country, and it is the earliest industrialized synthetic fiber variety in the world. Compared with other synthetic fibers, nylon fiber has the advantages of high strength, good wear resistance, good elasticity, light weight, corrosion resistance, no fear of moths, and no mold. It occupies a pivotal position in the fields of clothing, home textiles and industrial applications. Widely used, it is the second largest synthetic fiber after polyester fiber. However, nylon fabric is extremely flammable, and its limiting oxygen index (LOI) is between 22% and 24%. Compared with other polymer materials, it has a large specific surface area, so the flame spreads extremely fast when burning. The m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G79/04D06M15/667
Inventor 胡源葛骅潘颖宋磊
Owner UNIV OF SCI & TECH OF CHINA
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