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Method for preparing phenolic modified melamine fibers by one-step method

A melamine fiber and modification technology, applied in the direction of chemical characteristics of fibers, textiles and papermaking, one-component synthetic polymer rayon, etc. problems, to achieve the effect of fast spinning speed, simple and easy curing and cross-linking, and excellent mechanical properties of fibers

Inactive Publication Date: 2020-02-28
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, melamine has disadvantages such as high functionality and high cross-linking degree. It is not easy to synthesize or the resin has a short storage time after synthesis, which hinders the preparation of melamine fibers. How to improve the high performance of melamine fibers has become a research focus.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for preparing phenolic modified melamine fiber in one step in this embodiment is as follows:

[0023] The water-soluble polymer PVA was added to water, and after dissolving at a constant temperature of 40°C for 2 hours, a uniform water-soluble polymer solution with a weight content of 1% was obtained. Add melamine, phenol and paraformaldehyde (according to the amount of aldehyde group-containing substances) into the water-soluble polymer solution in a certain proportion (the molar ratio is 1:0.1:1) (the mass ratio of polymer to melamine is 1 : 0.1), and adding a basic catalyst triethanolamine to adjust the pH to 8, and reacting at 70°C for 0.5h to obtain a melamine resin spinning solution.

[0024] The obtained melamine resin spinning solution was spun with a wet spinning machine at 10°C, with a spinneret hole diameter of 0.1mm and a winding speed of 20m / min, and then passed through a 30°C saturated sodium sulfate coagulation bath ( The content of boric acid...

Embodiment 2

[0027] The method for preparing phenolic modified melamine fiber in one step in this embodiment is as follows:

[0028] The water-soluble polymer PEG was added to water and dissolved at a constant temperature of 90°C for 4 hours to obtain a uniform water-soluble polymer solution with a weight content of 30%. Melamine, cardanol and formaldehyde (according to the amount of substances containing aldehyde groups) are added to the water-soluble polymer solution in a certain proportion (molar ratio: 1:3:6) (the mass ratio of polymer to melamine is 1: 15), and adding a basic catalyst sodium hydroxide to adjust the pH to 11, and reacting at 90° C. for 6 hours to obtain a melamine resin spinning solution.

[0029] The obtained melamine resin spinning solution was spun with a wet spinning machine at 60°C, with a spinneret hole diameter of 0.5mm and a winding speed of 300m / min, and then passed through a 60°C saturated sodium sulfate coagulation bath ( The content of boric acid is 1wt%),...

Embodiment 3

[0032] The method for preparing phenolic modified melamine fiber in one step in this embodiment is as follows:

[0033] Add the water-soluble polymer polyvinyl formal into water, and dissolve it at a constant temperature of 80°C for 3 hours to obtain a uniform water-soluble polymer solution with a weight content of 10%. Add melamine, chlorophenol and glutaraldehyde (according to the amount of substances containing aldehyde groups) into the water-soluble polymer solution in a certain proportion (molar ratio: 1:0.2:6) (mass ratio of polymer to melamine is 1:12), and add the basic catalyst calcium hydroxide to adjust the pH to 8, and react at 80°C for 4 hours to obtain the melamine resin spinning solution.

[0034] The obtained melamine resin spinning solution was spun with a wet spinning machine at 50°C, with a spinneret hole diameter of 0.3mm and a winding speed of 200m / min, and then passed through a 50°C saturated sodium sulfate coagulation bath ( The content of boric acid is...

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Abstract

The invention discloses a method for preparing phenolic modified melamine fibers by a one-step method. The method comprises the steps of dissolving a water-soluble polymer in water, adding melamine, an aldehyde compound and a phenolic compound, and reacting under the action of an alkaline catalyst to obtain a resin solution of melamine modified by the phenolic compound; and performing wet spinningand heat curing to obtain the finished phenolic modified melamine fibers. The melamine fibers prepared through modification have the advantages of high nitrogen content, zero halogen, good flame retardance, high fiber elongation and the like, and have a good application prospect.

Description

technical field [0001] The invention belongs to the field of synthesis and preparation of melamine flame-retardant fibers, and more specifically relates to a method for preparing melamine fibers with excellent properties through a copolymerization reaction of aldehyde compounds, phenolic compounds and melamine in one step. Background technique [0002] Melamine fiber is a new type of flame-retardant fiber, which is formed by condensation polymerization of melamine and formaldehyde. Melamine fiber has good flame retardancy, high nitrogen content, good dyeability, and high thermal decomposition temperature [Yang Zhiyuan, Lu Kuilin, Jiang Mengjin. Research on the structure and properties of MF-PVA flame-retardant fiber[J]. Synthetic Fiber Industry, 2008( 1):44-47.], melamine is cheap and has been widely used in some high-temperature fields. However, melamine has disadvantages such as high functionality and high degree of crosslinking. It is not easy to synthesize or the resin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94C08G14/12C08G14/10
CPCD01F6/94C08G14/12C08G14/10
Inventor 杨凯焦明立李洁贾万顺郑瑾刁泉张啸梅
Owner ZHONGYUAN ENGINEERING COLLEGE
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