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A kind of flame retardant for cotton and preparation method thereof

A flame retardant and alkyl technology, applied in the field of flame retardant for cotton and its preparation, can solve the problems of unsatisfactory effect of durable flame retardant, environmental and human health hazards, and failure to meet environmental protection requirements, and achieve durable flame retardant. , low cost, good flame retardant performance

Active Publication Date: 2015-09-16
DYMATIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the currently used flame retardants for cotton have formaldehyde problems in the process of synthesis, finishing and consumption, which has caused harm to the environment and human health.
At the same time, due to non-compliance with environmental protection requirements, the export of textiles is severely restricted by various countries.
Moreover, the durable flame retardant effect of the currently used flame retardants for cotton is not ideal

Method used

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  • A kind of flame retardant for cotton and preparation method thereof
  • A kind of flame retardant for cotton and preparation method thereof
  • A kind of flame retardant for cotton and preparation method thereof

Examples

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preparation example Construction

[0047] Such as figure 1 Shown, the present invention also discloses a kind of preparation method of flame retardant for cotton, comprising:

[0048] S101, adding 3-dimethoxyphosphoryl propionamide into the reactor, and raising the temperature of the system to a specified temperature.

[0049] In step S101: the temperature of the system is raised to a specified temperature, and the specified temperature is 80-100°C.

[0050] Preferably, the specified temperature is 90°C.

[0051] The reactor is equipped with stirring, reflux condenser and thermometer.

[0052] S102, Stir and add metered diisocyanate compounds, keep warm for 1-6 h.

[0053] Preferably, the incubation time is 3 to 4 hours.

[0054] The diisocyanate compounds can be selected from one or more of hexamethylene diisocyanate, octyl diisocyanate, decane diisocyanate, toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, and dicyclohexylmethane diisocyanate. kind.

[0055] Preferably, the di...

Embodiment 1

[0077] Add 91g (0.5mol) of 3-dimethoxyphosphorylpropionamide into the reactor equipped with stirring, reflux condenser and thermometer, raise the temperature to 90°C, add 84g of hexamethylene diisocyanate under stirring, and keep it warm for 3~4 hours. During this period, the -NCO group content was detected (toluene-di-n-butylamine method), and when the -NCO content reached the theoretical value of 12-12.5%, it was lowered to room temperature. Add an appropriate amount of a mixture of N-methylpyrrolidone and water with a mass ratio of 1:3, and quickly add 191g (0.55mol) of a 30% aqueous solution of sodium bisulfite, an end-capping agent. Control the system temperature below 45°C and react for 30 min. Obtaining the solid content of the present invention is 50% cotton flame retardant A.

Embodiment 2

[0079] Except changing the reactive component in Example 1 from 84g of hexamethylene diisocyanate to 98g of octane diisocyanate, the process of Example 1 was repeated to obtain flame retardant B for cotton.

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Abstract

The invention discloses a cotton flame retardant. The cotton flame retardant has a chemical structure represented by a general formula. In the general formula, R is one or more of alkyl groups, a tolyl group, an isophorone group, a dibenzylmethane group and a dicyclohexylmethane group. The invention also discloses a preparation method of the cotton flame retardant. The preparation method comprises the following steps: adding 3-dimethoxyphosphoryl propionamide to a reactor, and heating a system to an assigned temperature; stirring, adding a diisocyanate compound, and carrying out heat insulation for 1-6h; detecting the content of an -NCO group, and cooling to room temperature after the content of the -NCO group reaches a theoretical value; adding a mixture comprising N-methyl-2-pyrrolidinone and water; and rapidly adding an end capping reagent sodium bisulfate, and reacting at a controlled system temperature for 10-50min to prepare the cotton flame retardant. The cotton flame retardant has the advantages of environmental protection, durability, no formaldehyde release, strong flame retardation performance and strong reactivity, and can be reacted with a hydroxy group contained in cotton fibers in the finishing process to realize the durable flame retardation effect.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to a flame retardant for cotton and a preparation method thereof. Background technique [0002] Cotton fiber is widely available, economical, and has excellent moisture absorption, breathability, good dyeability and ecological relevance. With the improvement of people's living standards, the demand for comfortable cotton fabrics is increasing day by day, and the requirements for cotton fabric finishing are also getting higher and higher. Cotton fiber is a flammable fiber, and the flammability of cotton fabrics often threatens the safety of people's lives and properties. Therefore, the durable flame-retardant finishing of cotton has gradually developed into a very necessary and high value-added finishing technology. [0003] Most of the currently used flame retardants for cotton have formaldehyde problems in the process of synthesis, finishing and consumption, which has ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/447C07F9/40D06M101/06
Inventor 郭玉良朱泉沈华陈祖芬
Owner DYMATIC CHEM