Non-formaldehyde flame retardant for viscose fiber

A viscose fiber and flame retardant technology, applied in the field of formaldehyde-free flame retardants, can solve the problems of large formaldehyde residues, etc., and achieve the effects of less strength reduction, good hand feeling, and good whiteness

Inactive Publication Date: 2009-08-05
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of synthesis, due to the use of formaldehyde f

Method used

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  • Non-formaldehyde flame retardant for viscose fiber
  • Non-formaldehyde flame retardant for viscose fiber
  • Non-formaldehyde flame retardant for viscose fiber

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Embodiment Construction

[0028] The specific synthesis process of the present invention is to add phosphite and acrylamide in a molar ratio of 1.02:1, weigh them and add them to the reactor. After the two components are mutually soluble, add halides, oxides, and hydroxides of divalent metals, stir well, and after they are completely dissolved, add the catalyst; when the amount of the catalyst is added to about 50-60%, a violent explosion occurs Exothermic reaction, at this time, the exothermic reaction is controlled by controlling the rate of addition of the catalyst, so that the temperature does not exceed 70°C; drop until the exothermic reaction no longer occurs, keep the reaction for 3 hours after the drop, and the temperature drops to room temperature , to obtain white crystals, namely the crude product of alkoxyphosphorylpropionamide.

[0029] The obtained intermediate crude product was dissolved in distilled water at a ratio of 100ml per mole, heated up to 30°C and added to 20% concentration of ...

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Abstract

The invention discloses a formaldehyde-free flame retardant for viscose fibers, which is a phosphate esters flame retardant of synthesizing acid amide by carrying out Michael addition reaction of phosphite ester and acrylamide compounds, and carrying out the reaction of generated acid amide functional groups and epoxy compounds. The structural formula of the flame retardant is shown above. The flame retardant, together with a cross-linking agent, a penetrating agent, a catalyst and a urea, is prepared into a flame retardant finishing liquid in proportion with water for fire retardant treatment of viscose fibers. The viscose fiber fabric after treatment has the advantages of good flame retardant effect, high durability, good hand touch, little strength reduction, good whiteness and the like.

Description

technical field [0001] The invention relates to a new flame retardant material, in particular to a formaldehyde-free flame retardant for viscose fiber. Background technique [0002] Experts and scholars at home and abroad have developed a series of flame retardants and corresponding processes suitable for cellulose fibers, such as cotton fabric flame retardants and THPC from Allbright & Wilson in the UK. Pyrovatex CP of Switzerland Ciba Company is a representative. THPC is tetrakis hydroxymethyl phosphorus chloride, but due to the possibility of producing dichloromethyl ether during its synthesis, there is a risk of carcinogenicity, and the content of free formaldehyde is high. These inherent defects limit its application range. The scientific name of Pyrovatex CP is: N-hydroxymethyl-3-(dimethoxyphosphoryl) propionamide, which belongs to the phosphate compound of amides. Pyrovatex CP is a Michael addition of dimethyl phosphite and acrylamide. Then formaldehyde for hydroxym...

Claims

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Application Information

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IPC IPC(8): D06M13/447C07F9/40D06M101/16
Inventor 敖玉辉胡江涛李连贵陈永祥张会轩
Owner CHANGCHUN UNIV OF TECH
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