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Multifunctional flame retardant as well as preparation and application thereof

A multi-functional, flame retardant technology, applied in textiles and papermaking, chemical instruments and methods, organic chemistry, etc., can solve problems such as strong flammability, limited use range, formaldehyde release, etc., and achieve good synergistic flame retardancy and soap resistance Good wash fastness and low cost

Inactive Publication Date: 2011-04-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But cellulose fiber fabrics also have their disadvantages: they are highly flammable, which limits their range of use
However, both types of flame retardants contain methylol in their structures, and there is a problem of formaldehyde release during use.

Method used

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  • Multifunctional flame retardant as well as preparation and application thereof
  • Multifunctional flame retardant as well as preparation and application thereof
  • Multifunctional flame retardant as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take a dry 500ml four-necked flask, and use dry nitrogen to remove the air therein. Add 11.41 ml (0.125 mol) of phosphorus oxychloride, 54.21 ml (0.375 mol) of triethylamine (for absorbing hydrogen chloride produced by the reaction), and 50 ml of dry THF into a four-necked flask. Add 5.06ml (0.125mol) of anhydrous methanol and 50ml of dry THF into a 125ml separatory funnel. Cool the reaction system to below 5°C with an ice-salt bath, and then gradually add methanol in THF dropwise to the flask. During the whole dropping process, the temperature of the system should be kept below 5°C, and it should be carried out under nitrogen protection and mechanical stirring. After the dropwise addition, a condensing reflux device was installed, and the reactor was placed in a water bath at 35° C., mechanically stirred under the protection of nitrogen, and refluxed for 3 hours. Then lower the temperature of the reaction system to below 5°C, take another 125ml separatory funnel, add...

Embodiment 2

[0041] The reaction conditions of this example are basically the same as in Example 1, wherein the intake of anhydrous methanol is changed to 10.12ml (0.25mol), and the intake of gamma-aminopropyltriethoxysilane is changed to 29.20ml (0.125mol). was 74%. The obtained product II is light yellow viscous liquid, which is soluble in organic solvents such as water and THF. The infrared spectrum of product II is shown in image 3 .

Embodiment 3

[0043] The reaction conditions of this example are basically the same as in Example 1, wherein the feed ratio of phosphorus oxychloride to γ-aminopropyltriethoxysilane is 1:3, which is 11.41ml (0.125mol) and 87.60ml (0.375mol) respectively. ), the one-step reaction is completed, and the reaction yield is 74%. The obtained product III is a yellow viscous liquid, soluble in water, ethanol, THF and other organic solvents. The infrared spectrum of product III is shown in Figure 4 .

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Abstract

The invention relates to a multifunctional flame retardant as well as preparation and an application thereof. The structural general formula of the flame retardant is as shown in the specification. The preparation comprises the following steps: adding phosphorus oxychloride and triethylamine into a reactor in which the air is exhausted with nitrogen, adding a solvent and sufficiently stirring under the nitrogen protection; adding alcohol or phenol in a separating funnel, and adding a solvent and mixing uniformly; dropwise adding the mixture into the reactor; after the mixture is dropwise added completely, heating and reflowing for reaction; after the reaction is over, reducing the temperature of the system to below 5 DEG C; adding aminopropyl trialkoxysilane in the separating funnel, and adding a solvent and mixing uniformly; slowly dropwise adding the mixture into the reactor, then heating and reflowing for reaction; and performing filtration, rotary evaporation, separation and purification to obtain the product. The flame retardant finishing agent provided by the invention has relatively good flame retardant effect, the finished fabric has high charring rate when being burnt and high laundry resistance, is environment-friendly and efficient, releases no formaldehyde and generates no toxic gas in the burning process. The finishing agent is applicable to purified cotton and cellulose fiber fabrics or blend fabrics thereof.

Description

technical field [0001] The invention belongs to the field of flame retardant and its preparation and application, in particular to a multifunctional flame retardant and its preparation and application. Background technique [0002] In recent years, cellulose fiber has been favored by people for its excellent hygroscopicity and antistatic properties. But cellulose fiber fabrics also have their disadvantages: they are highly flammable, which limits their range of use. Taking cotton fabrics as an example, among the durable flame retardant finishing agents used for cotton fiber fabrics, the flame retardants containing halogen elements in the molecules have good flame retardant effects, but the flame retardants containing halogen elements are not stable during use. There is an environmental pollution problem, therefore, such flame retardants are being phased out. [0003] At present, the durable flame-retardant finishing technology of cotton fabrics on the market mainly uses N-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/513C07F9/22C07F9/24D06M101/06
Inventor 陆大年郭超
Owner DONGHUA UNIV
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