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Hydrophobic flame retardant and preparation method thereof

A technology of flame retardants and intumescent flame retardants, applied in coatings, fireproof coatings, etc., can solve the problems of unsuitable for large-scale application, unsatisfactory hydrophobic effect of flame retardants, high cost, etc., and achieve low cost and simple preparation method , good compatibility effect

Inactive Publication Date: 2020-05-15
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the hydrophobic effect of the flame retardant obtained above is still not ideal.
A good hydrophobic effect can be obtained by using fluorine-containing modifiers, but its cost is very high and it is not suitable for large-scale applications

Method used

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  • Hydrophobic flame retardant and preparation method thereof
  • Hydrophobic flame retardant and preparation method thereof
  • Hydrophobic flame retardant and preparation method thereof

Examples

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Effect test

preparation example Construction

[0034] The preparation method of hydrophobic flame retardant of the present invention comprises the following steps:

[0035] Disperse the flame retardant in the mixture of ethanol and water, stir and heat up to 30-50°C, adjust the pH value of the solution at 8-12, add modifier, react at this temperature for 1-3 hours, and then raise the temperature to 55-80°C, add modifier again, continue to react at this temperature for 1-3 hours, and finally cool to room temperature, filter with suction, wash, and dry to constant weight to obtain the hydrophobic flame retardant.

Embodiment 1

[0038] A preparation method of a hydrophobic flame retardant, comprising the following steps:

[0039] Disperse 50g of magnesium hydroxide in a mixture of 150ml of ethanol and 50ml of water, stir and heat up to 40°C, adjust the pH of the solution to 9, add 10g of tetraethyl orthosilicate, and react at this temperature for 2h; Raise the temperature to 55°C, add 2.5g of vinyltrimethoxysilane again, and continue the reaction at this temperature for 1 hour; finally cool to room temperature, filter with suction, wash, and dry to constant weight to obtain a hydrophobic flame retardant.

[0040] Hydrophobic test is carried out to the hydrophobic flame retardant in the present embodiment: the water contact angle of the hydrophobic flame retardant made by embodiment 1 is 138.16 ° (see figure 1 ).

Embodiment 2

[0042] A preparation method of a hydrophobic flame retardant, comprising the following steps:

[0043] Disperse 50g of magnesium hydroxide in a mixture of 150ml of ethanol and 50ml of water, stir and heat up to 40°C, adjust the pH of the solution to 9, add 10g of tetraethyl orthosilicate, and react at this temperature for 2h; Raise the temperature to 60°C, add 2g of dodecyltriethoxysilane again, and continue the reaction at this temperature for 1.5h; finally cool to room temperature, suction filter, wash, and dry to constant weight to obtain a Hydrophobic flame retardant.

[0044] Hydrophobic test is carried out to the hydrophobic flame retardant in the present embodiment: the water contact angle of the hydrophobic flame retardant made by embodiment 2 is 134.58 ° (see figure 2 ).

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Abstract

The invention provides a hydrophobic flame retardant and a preparation method thereof, and relates to the technical field of flame retardant modification. The hydrophobic flame retardant contains 70-95% by mass of a flame retardant and 5-30% by mass of a modifier; the flame retardant is one or more of an inorganic flame retardant, a component of a compound intumescent flame retardant and a simplesubstance type intumescent flame retardant; the modifier is one or more of tetraethyl silicate, vinyl trimethoxy silane, vinyl triethoxy silane, vinyl tri(2-methoxyethoxy) silane, polyoxyethylene octyl phenol ether-10, dodecyl trimethoxy silane, dodecyl triethoxy silane, hexadecyl trimethoxy silane, hexadecyl triethoxy silane, octadecyl trimethoxy silane and octadecyl triethoxy silane. The hydrophobic flame retardant is prepared through multiple surface modification, the flame retardant is endowed with high hydrophobicity, meanwhile, the flame retardant performance of the flame retardant is improved, the compatibility between the flame retardant and a polymer matrix is good, the preparation method is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of flame retardant modification, in particular to a hydrophobic flame retardant and a preparation method thereof. Background technique [0002] Combustible polymer materials, which are widely used in modern life, have become one of the main ignition materials for fires, especially urban fires and building fires, and their fire hazards are increasingly concerned and valued by people. [0003] Halogenated flame retardants (mainly brominated flame retardants and chlorine-based flame retardants) have high flame retardant efficiency, but they will produce acidic substances and dioxins during the flame retardant process, which will have adverse effects on humans and the environment . Inorganic flame retardants based on aluminum hydroxide and magnesium hydroxide and intumescent flame retardants mainly composed of phosphorus and nitrogen compounds do not contain halogens and are relatively environmentally friendly ...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K3/22C08K3/32C08K5/3492C08L23/06C08L23/12C08L23/08C08L75/04C08L67/04C09D5/18
CPCC08K9/06C08K3/22C08K3/32C08K5/3492C09D5/18C08K2003/2224C08K2003/323C08L23/06C08K5/34924C09K21/02C09K21/04C09D7/62C09K21/12
Inventor 聂士斌张向峰杨继年金蝶张曦韩超
Owner ANHUI UNIV OF SCI & TECH
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