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Water-based halogen-free flame retardant and its preparation method and application

A flame retardant and water-based technology, which is applied in the field of water-based halogen-free flame retardants and their preparation, can solve problems such as difficulty in achieving scale-up production, complex preparation methods of flame retardants, and harsh preparation conditions, so as to avoid the release of formaldehyde , less toxic fume release, good storability effect

Active Publication Date: 2017-04-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of the flame retardant is relatively complicated, the conditions required for the preparation are relatively harsh, and it is difficult to realize the scaled-up production, and the preparation process requires the use of a large amount of organic solvents, which is costly and not environmentally friendly.

Method used

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  • Water-based halogen-free flame retardant and its preparation method and application
  • Water-based halogen-free flame retardant and its preparation method and application
  • Water-based halogen-free flame retardant and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0031] At room temperature, first add 0.5mol (89.7g) γ-aminopropyltrimethoxysilane to 0.2L deionized water, then add dropwise 0.1L aqueous solution containing 0.5mol (33.0g) hypophosphorous acid while stirring, drop After the addition, continue to stir and react at room temperature for 2 hours to obtain a colorless and transparent sol solution, or to obtain a colorless and transparent solid after distilling off the solvent.

Embodiment 2

[0033]At room temperature, first add 0.10mol (19.1g) of γ-aminopropylmethyldiethoxysilane to 0.3L of deionized water, and then dropwise add 0.05mol (7.1g) of phenyl hypophosphorous acid while stirring. 0.1L aqueous solution, after the dropwise addition, continue to stir and react at room temperature for 4 hours to obtain a colorless and transparent sol solution, or evaporate the solvent to obtain a colorless and transparent viscous liquid.

Embodiment 3

[0035] At room temperature, first add 0.3mol (57.8g) of γ-aminopropyltrimethoxysilane to 0.2L of deionized water, then add dropwise 0.3L of ethanol and 0.3mol (69.6g) of DOPO-OH while stirring. For the water solution, after the dropwise addition, continue to stir and react at room temperature for 10 hours to obtain a colorless and transparent sol solution, or to obtain a colorless and transparent solid after distilling off the solvent.

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Abstract

A disclosed aqueous halogen-free fire retardant has at least one of the structure general formulas shown in the specification. The fire retardant is prepared according to the following method: firstly adding A mol of an amino silane coupling agent into excess water at normal temperature, then dropwise adding B mol of a water solution or an ethanol and water solution of a phosphorus-containing organic acid or inorganic acid with stirring, continuing to stir for reaction for 2-12 h after dropwise adding is finished, and doing nothing or evaporating the solvent, so as to obtain the fire retardant, wherein 0<B<=3A. The invention also discloses application of the aqueous halogen-free fire retardant. The disclosed aqueous halogen-free fire retardant is good in stability at normal temperature, long in storage period and high in fire-retardation efficiency, and releases less toxic smoke amount during combustion. The preparation technology is simple, easy to control, and free of organic solvents. No toxic substances are discharged during preparation and usage, preparation and application are green and free of pollution, and industrialization is facilitated. Also, the fire retardant is good in compatibility with various materials, is colorless or light-colored and transparent, and is not high in usage amount and relatively wide in application scope.

Description

technical field [0001] The invention belongs to the technical field of water-based flame retardant and its preparation and application, and in particular relates to a water-based halogen-free flame retardant and its preparation method and application. Background technique [0002] Polymer materials have good electrical insulation, good chemical stability and convenient processing and molding, so they have been widely used. However, its flammability limits its application in more fields, such as electronic devices, flame-retardant protective clothing and decorations in specific places. The use of flame retardants can often effectively improve the flame retardant properties of various polymer materials and broaden their application range. [0003] When a fire occurs, halogen-containing flame-retardant materials often produce a large amount of smoke and toxic corrosive hydrogen halide gas during the flame-retardant process, causing secondary hazards. The European Union has su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K21/14C08L75/04C08L63/00C08L23/06C08L23/12C08L97/02C08L29/04C08L83/08C08G77/26D06M15/643D21H21/14D21H17/59B27K3/36B27K3/38D06M101/06D06M101/32
Inventor 王玉忠徐英俊饶文辉杨君驰廖望
Owner SICHUAN UNIV