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Preparation method and application of cotton environment-friendly flame retardant

A flame retardant and environment-friendly technology is applied in the field of preparation of environment-friendly flame retardants for cotton. Good flame retardant effect, improved flame retardant and washability, good flame retardant effect

Inactive Publication Date: 2015-06-24
SUZHOU CHENHENG WEAVING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flame retardants for cotton fabrics are high value-added products, but at present most durable flame retardants for cotton use methylol groups generated from formaldehyde as reactive groups to cross-link with cellulose fibers, and there is a problem of free formaldehyde release when finishing fabrics; The flame retardant without methylol group has poor washing resistance
[0005] Phosphazene derivatives are intumescent flame retardants with phosphorus-nitrogen synergistic effect. They are halogen-free and environmentally friendly. Does not contain active groups, resulting in low washing fastness of fabric and fiber finishing, which limits the application field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides a method for preparing an environmentally friendly flame retardant for cotton. The specific steps of the preparation method are as follows:

[0052] (1) Preparation of formaldehyde-free flame retardant

[0053] (1) Add diethyl phosphite and diethyl phthalate into a four-necked flask equipped with a stirrer, a spherical condenser, a thermometer and a constant pressure funnel, slowly add acrylamide dropwise, and keep warm at 40°C; After acrylamide is dissolved, sodium methoxide solution is added dropwise, the temperature is slowly raised to 70°C, and the reaction is carried out for 5 hours to obtain the intermediate 3-diethoxyphosphonopropionamide;

[0054] The mass ratio of diethyl phosphite to diethyl phthalate is 4:5; the mass ratio of sodium methoxide to acrylamide is 1.2:1;

[0055] (2) At 63°C, add a solution of hexachloroepoxyphosphazene in tetrahydrofuran to the bottom of the four-necked flask containing the intermediate 3-diethoxyphosphono...

Embodiment 2

[0088] This embodiment provides a method for preparing an environmentally friendly flame retardant for cotton. The specific steps of the preparation method are as follows:

[0089] (1) Preparation of formaldehyde-free flame retardant

[0090] (1) Add diethyl phosphite and diethyl phthalate into a four-necked flask equipped with a stirrer, a spherical condenser, a thermometer and a constant pressure funnel, slowly add acrylamide dropwise, and keep warm at 40°C; After acrylamide is dissolved, sodium methoxide solution is added dropwise, the temperature is slowly raised to 75°C, and the reaction is carried out for 4 hours to obtain the intermediate 3-diethoxyphosphonopropionamide;

[0091] The mass ratio of diethyl phosphite to diethyl phthalate is 3:5; the mass ratio of sodium methoxide to acrylamide is 1.2:1;

[0092] (2) At 60°C, add a solution of hexachloroepoxyphosphazene in tetrahydrofuran to the bottom of the four-necked flask containing the intermediate 3-diethoxyphospho...

Embodiment 3

[0125] This embodiment provides a method for preparing an environmentally friendly flame retardant for cotton. The specific steps of the preparation method are as follows:

[0126] (1) Preparation of formaldehyde-free flame retardant

[0127] (1) Add diethyl phosphite and diethyl phthalate into a four-necked flask equipped with a stirrer, a spherical condenser, a thermometer and a constant pressure funnel, slowly add acrylamide dropwise, and keep warm at 40°C; After acrylamide is dissolved, sodium methoxide solution is added dropwise, the temperature is slowly raised to 72°C, and the reaction is carried out for 4 hours to obtain the intermediate 3-diethoxyphosphonopropionamide;

[0128] The mass ratio of diethyl phosphite to diethyl phthalate is 7:10; the mass ratio of sodium methoxide to acrylamide is 1.2:1;

[0129] (2) At 65°C, add a solution of hexachloroepoxyphosphazene in tetrahydrofuran to the bottom of the four-necked flask containing the intermediate 3-diethoxyphosph...

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Abstract

The invention discloses a preparation method and an application of a cotton environment-friendly flame retardant. The method comprises the following steps: respectively preparing an aldehyde-free flame retardant, a phosphorus-nitrogen-silicon ternary flame retardant and a phosphorus-element synergistic flame retardant; and mixing the prepared flame retardants to prepare the environment-friendly flame retardant. The flame retardant has the advantages of high efficiency, low smoke, low toxicity, and small in injury to fabric; the raw materials are environment-friendly and low in price; and the preparation method is simple in process and high in production rate. The invention further designs application of the cotton environment-friendly flame retardant. The flame retardant is applied to the fabric; the arranged fabric is relatively good in flame retardant effect, and the softness of the fabric is not greatly affected.

Description

technical field [0001] The invention belongs to the field of preparation of textile auxiliaries, and in particular relates to a preparation method and application of an environment-friendly flame retardant for cotton. Background technique [0002] With the improvement of the economic level, the consumption of textiles is increasing year by year, and the types are emerging in an endless stream. Cotton fabric is the most widely used in many textile fields, but because the limiting oxygen index of cotton fiber is only 18.0, it is a flammable fiber, especially In recent years, the number of fires caused by the increasing demand for cotton fabrics has been increasing year by year. Therefore, it is particularly important to perform flame-retardant finishing on cotton fabrics. [0003] Fabric flame retardants need to meet the following requirements: (1) can inhibit both flame and flameless combustion; (2) use less, good flame retardant effect; (3) durable flame retardant, washable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/44D06M13/50D06M13/358D06M13/432D06M13/292C07F9/6593C07F9/6521C07F9/09D06M101/06
Inventor 陈菊媛叶冬明
Owner SUZHOU CHENHENG WEAVING
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