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Method for preparing flame-retardant cotton fabric without solvents

A solvent-free technology for cotton fabrics, applied in the direction of flame-retardant fibers, plant fibers, textiles and papermaking, etc., can solve the problems of formaldehyde residue and formaldehyde release, and achieve the effect of excellent washing resistance

Active Publication Date: 2019-12-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the existing cotton fabric flame retardant finishing agent has the problem of formaldehyde residue and subsequent formaldehyde release in the preparation process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for preparing flame-retardant cotton fabric without solvents
  • Method for preparing flame-retardant cotton fabric without solvents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A solvent-free method for preparing a flame-retardant finishing agent for cotton fabrics, the specific steps are:

[0025] (1) The hyperbranched polyester and phosphoric acid are mixed at a molar ratio of 1:16, continuously stirred, and reacted for 3 hours at 120° C. to obtain a phosphorus-containing hyperbranched polyester;

[0026] (2) Add urea to phosphorus-containing hyperbranched polyester, the molar ratio of phosphorus-containing hyperbranched polyester to urea is 1:16, condense and reflux at 100°C, react for 1 hour, precipitate with ethanol, separate and purify the Phosphorus and nitrogen hyperbranched polyester are dried in a vacuum oven at 80°C for subsequent use;

[0027] (3) Dissolve the phosphorus-containing and nitrogen-containing hyperbranched polyester in deionized water, add dicyandiamide with a solution quality of 5wt%, and soak the cotton fabric in the above solution with a bath ratio of 1:20, and soak it at 70°C After 30 minutes, the cotton fabric wa...

Embodiment 2

[0029] A solvent-free method for preparing a flame-retardant finishing agent for cotton fabrics, the specific steps are:

[0030] (1) The hyperbranched polyester and phosphoric acid are mixed in a molar ratio of 1:16, continuously stirred, and reacted for 3 hours at 130° C. to obtain a phosphorus-containing hyperbranched polyester;

[0031] (2) Add urea to phosphorus-containing hyperbranched polyester, the molar ratio of phosphorus-containing hyperbranched polyester to urea is 1:16, condense and reflux at 100°C, react for 1 hour, precipitate with ethanol, separate and purify the Phosphorus and nitrogen hyperbranched polyester are dried in a vacuum oven at 80°C for subsequent use;

[0032] (3) Dissolve the phosphorus-containing and nitrogen-containing hyperbranched polyester in deionized water, add dicyandiamide with a solution quality of 5wt%, and soak the cotton fabric in the above solution with a bath ratio of 1:20, and soak it at 70°C After 30 minutes, the cotton fabric wa...

Embodiment 3

[0035] A solvent-free method for preparing a flame-retardant finishing agent for cotton fabrics, the specific steps are:

[0036] (1) The hyperbranched polyester and phosphoric acid are mixed at a molar ratio of 1:16, continuously stirred, and reacted for 3 hours at 140° C. to obtain a phosphorus-containing hyperbranched polyester;

[0037] (2) Add urea to phosphorus-containing hyperbranched polyester, the molar ratio of phosphorus-containing hyperbranched polyester to urea is 1:16, condense and reflux at 100°C, react for 1 hour, precipitate with ethanol, separate and purify the Phosphorus and nitrogen hyperbranched polyester are dried in a vacuum oven at 80°C for subsequent use;

[0038] (3) Dissolve the phosphorus-containing and nitrogen-containing hyperbranched polyester in deionized water, add dicyandiamide with a solution quality of 5wt%, and soak the cotton fabric in the above solution with a bath ratio of 1:20, and soak it at 70°C After 30 minutes, the cotton fabric wa...

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Abstract

The invention discloses a method for preparing a cotton fabric flame-retardant finishing agent without solvents and application. The method comprises the steps: mixing hyperbranched polyester with a phosphoric acid for a reaction to obtain phosphorus-containing hyperbranched polyester; adding urea into the phosphorus-containing hyperbranched polyester for a reaction, then executing precipitation with ethanol, and executing separation and purification to obtain phosphorus-containing and nitrogen-containing hyperbranched polyester; dissolving the phosphorus-and nitrogen-containing hyperbranchedpolyester in deionized water, and then adding dicyandiamide to obtain the cotton fabric flame-retardant finishing agent. A cotton fabric is impregnated in the cotton fabric flame-retardant finishing agent and then is taken out, and two times of impregnation and two time of rolling are conducted on the cotton fabric; after the cotton fabric is baked, the cotton fabric is washed with clear water anddried to obtain a flame-retardant cotton fabric. The flame-retardant finishing agent does not need any solvent, and the technological process is friendly to the environment and human. In the flame-retardant finishing process of the cotton fabric and the using process of the flame-retardant fabric, no formaldehyde is released, and in the flame-retardant finishing process, a flame retardant and thecotton fabric form a plurality of firm covalent bonds, so that the cotton fabric has high-efficiency flame retardance and excellent washing resistance.

Description

technical field [0001] The invention relates to a solvent-free method for preparing flame-retardant cotton fabrics, belonging to the technical field of flame-retardant finishing of textiles. Background technique [0002] Cotton fabric has excellent moisture absorption, breathability, dyeability and biocompatibility, and is soft to the touch. The application of cotton textiles penetrates into every aspect of science and technology and life, but while textiles are widely used, the threat to people's life and property safety is gradually expanding. A large number of studies have proved that when a fire occurs, the use of flame-retardant textiles has a longer escape guarantee time, releases 75% less heat than non-flame-retardant textiles, and releases 2 / 3 lower than non-flame-retardant textiles. ), and no dense smoke is produced, which effectively reduces fire losses and protects human life. Therefore, flame-retardant finishing of textiles can reduce the incidence of fire and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/507D06M13/432C08G83/00D06M101/06
CPCC08G83/006D06M13/432D06M15/507D06M2101/06D06M2200/30
Inventor 凌超郭腊梅费小妹戴传彪
Owner DONGHUA UNIV
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