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Sulfur-containing intumescent flame retardant and preparation method thereof

A technology of intumescent flame retardant and compound, which is applied in the field of polymer additives and its preparation to achieve good flame retardant effect and low price

Active Publication Date: 2022-04-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Compared with phosphorus, sulfur has more outstanding performance in flame retardancy, but due to the generation of toxic gases such as sulfur dioxide during combustion, it has long been excluded from flame retardancy applications
But from a macro point of view, the mass-produced flame retardants seldom work in application, that is, they are burned in the event of a fire, thus producing flame retardancy.

Method used

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  • Sulfur-containing intumescent flame retardant and preparation method thereof
  • Sulfur-containing intumescent flame retardant and preparation method thereof
  • Sulfur-containing intumescent flame retardant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of the intumescent flame retardant provided by the present embodiment comprises the following steps:

[0028] (1) 5 parts of carboxymethyl cellulose are dissolved in 1000 parts of water to obtain carboxymethyl cellulose solution;

[0029] (2) Dissolving 1 mol of sodium p-aminobenzenesulfonate and 1 mol of melamine in 2 mol of 37% formaldehyde aqueous solution at 50° C. for 1 hour under magnetic stirring to obtain an intermediate product;

[0030] (3) The above carboxymethyl cellulose solution and the prepared intermediate product were magnetically stirred at 50° C. for 24 hours to obtain an intumescent flame retardant.

[0031] After testing, the chemical structural formula of the intumescent flame retardant provided in this embodiment is as follows:

[0032] figure 1 The infrared spectrogram of the intumescent flame retardant provided in this example.

[0033] As shown in the figure, at wave number 3000-3500cm -1 The peak fluctuation in the r...

Embodiment 2

[0037] At 50°C, mix the intumescent flame retardant and water-based polyurethane according to the ratio in Table 1 below, mix well with mechanical stirring, and then introduce the solution into a custom-made polytetrafluoroethylene mold to prepare a standard sample . According to the GB / T2408-2008 standard, the vertical combustion of the flame-retardant water-based polyurethane sample was measured.

[0038]

[0039] Table 1 Compounding scheme of WPU

[0040] sample Waterborne polyurethane / % Flame retardant / % WPU 100 0 WPU1 98 2％ WPU2 97 3％ WPU3 96 4％

[0041] The measured results are shown in Table 2 below. The flame retardant grade of waterborne polyurethane without adding flame retardant is only HB grade, and there are molten drops; when the flame retardant is added at 3%, the flame retardant grade reaches V-1, Melt droplets did not appear. And as the flame retardant content increases, the flame retardant effect is better. ...

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Abstract

The invention discloses a sulfur-containing intumescent flame retardant and a preparation method thereof, and aims to catalyze a sulfur element in an acid source to replace a toxic phosphorus element. Environment-friendly melamine, sodium sulfanilate, carboxymethyl cellulose and other raw materials are selected and subjected to aldol condensation to obtain the high-molecular intumescent flame retardant connected through covalent bonds. Through sulfur-nitrogen synergistic flame retardance, the additive amount is small, a good flame retardant effect is obtained, and the flame retardant is suitable for materials such as polyurethane and epoxy resin. The preparation process is simple and is suitable for large-scale production and application.

Description

technical field [0001] The invention relates to a polymer additive and a preparation method thereof, in particular to a sulfur-nitrogen synergistic flame retardant and a preparation method thereof. Background technique [0002] Polymer materials have penetrated into all aspects of human life. While bringing diverse properties such as lightness, comfort and beauty to humans, their flammability shortcomings often threaten human life. Therefore, flame retardant modification is an important aspect of polymer materials. The most important link in the application of materials, especially with the development of modern civilization, the emphasis on environmental protection has led to higher and higher requirements for flame retardants. [0003] From the perspective of the development history of flame retardants, halogen flame retardants once occupied more than 80% of the flame retardant market due to their good flame retardant effect, small filling amount, and low price. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08L75/04C08L87/00
CPCC08G81/00C08L75/04C08L2201/02C08L87/005Y02E60/10
Inventor 倪恨美周川郭剑桥
Owner SOUTHEAST UNIV
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