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Preparation method of viscose fiber subjected to blending modification with methoxypolyethylene glycol phosphazene

The technology of polyethylene glycol methyl ether phosphazene and ethylene glycol methyl ether is applied in the field of preparation of polyethylene glycol methyl ether phosphazene blended modified viscose fiber, and can solve the flame retardant of linear polyphosphazene polymer There are few problems such as less research on the agent, and the effect of good flame retardant effect is achieved.

Inactive Publication Date: 2017-08-11
SHAANXI HI-TECH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Regarding phosphazene flame retardants, although there are many relevant literature reports, they mainly focus on the research and development of cyclic phosphazene flame retardants, and there are still few studies on linear polyphosphazene polymer flame retardants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Synthesis of polyethylene glycol methyl ether phosphazene

[0021] Under the protection of nitrogen, use tetrahydrofuran as solvent, add ethylene glycol methyl ether and metal sodium into the three-necked flask for reaction; after the reaction is completed, add the tetrahydrofuran solution of polydichlorophosphazene into the above-mentioned three-necked flask, and heat After stirring and refluxing for 30~45 minutes, polyethylene glycol methyl ether phosphazene was obtained, most of the tetrahydrofuran in the system was removed by distillation under reduced pressure, and heptane was added to precipitate polyethylene glycol methyl ether phosphazene in the system, and hydrochloric acid was added dropwise Neutralize until the pH value is about 7, after stirring for 20 minutes, remove the lower part of the precipitate and add water to dissolve;

[0022] (2) Purification process of polyethylene glycol methyl ether phosphazene

[0023] After the above solution is heated t...

Embodiment 2

[0027] (1) Synthesis of polyethylene glycol methyl ether phosphazene

[0028] Under the protection of nitrogen, use tetrahydrofuran as solvent, add ethylene glycol methyl ether and metal sodium into the three-necked flask for reaction; after the reaction is completed, add the tetrahydrofuran solution of polydichlorophosphazene into the above-mentioned three-necked flask, and heat Stir and reflux for 30-45 minutes to obtain polyethylene glycol methyl ether phosphazene, remove most of the tetrahydrofuran in the system by distillation under reduced pressure, add heptane to precipitate polyethylene glycol methyl ether phosphazene in the system, add hydrochloric acid dropwise Neutralize until the pH value is about 7, after stirring for 20 minutes, remove the lower part of the precipitate and add water to dissolve;

[0029] (2) Purification process of polyethylene glycol methyl ether phosphazene

[0030] After heating the above solution to boiling, a precipitate precipitates out. A...

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PUM

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Abstract

The invention relates to the technical field of synthetic resin and plastics, in particular to a preparation method of a viscose fiber subjected to blending modification with methoxypolyethylene glycol phosphazene. The preparation method of the viscose fiber subjected to blending modification with methoxypolyethylene glycol phosphazene comprises the following steps: (1) synthesis of methoxypolyethylene glycol phosphazene; (2) purification of methoxypolyethylene glycol phosphazene; (3) preparation of blended flame-retardant viscose fiber. The prepared viscose fiber subjected to blending modification with methoxypolyethylene glycol phosphazene has good flame-retardant effect, and the limit oxygen index of the flame-retardant modified viscose fiber reaches 33%.

Description

technical field [0001] The invention relates to the technical field of synthetic resins and plastics, in particular to a method for preparing polyethylene glycol methyl ether phosphazene blended modified viscose fibers. Background technique [0002] Nitrogen and phosphorus have a synergistic effect on flame retardancy, which can not only improve the flame retardancy effect, but also cause less pollution to the environment. In recent years, phosphorus and nitrogen-based synergistic flame retardants have become the focus of the development of halogen-free flame retardants, and phosphazene flame retardants belong to this type of nitrogen-phosphorus synergistic flame retardants. Phosphazene compound is a kind of compound with both organic and inorganic characteristics. Its skeleton is formed alternately by nitrogen-phosphorus single bond and nitrogen-phosphorus double bond, forming a natural nitrogen-phosphorus synergistic system. It has good thermal stability, flame retardancy,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/08C08G79/025
CPCD01F2/08C08G79/025
Inventor 王耀斌
Owner SHAANXI HI-TECH IND CO LTD