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Flame-retardant and its preparation method

A technology of flame retardant and catalyst, which is applied in the field of flame retardant materials and their preparation, can solve problems such as unfavorable environmental protection, and achieve the effects of low cost, good water solubility, and remarkable flame retardant effect

Inactive Publication Date: 2009-12-09
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the flame retardants disclosed in the above documents have the advantages of simple manufacturing method and low cost, they contain toxic substances such as boron and formaldehyde, which are not conducive to environmental protection.

Method used

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  • Flame-retardant and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Prepare raw materials according to the following weight ratio:

[0044] Demineralized water (hardness below 8 degrees) 1.3kg

[0045] Phosphoric acid (85% concentration) 1.0kg

[0046] Urea (content 99%) 0.5kg

[0047] Catalyst: 0.0035kg

[0048] Among them, the catalyst is a light yellow-green powder prepared by the Environmental Protection Flame Retardant Technology Center of the School of Materials Science and Technology, Beijing Forestry University. The raw materials include 1 weight part of tin chloride, 2 weight parts of copper sulfate, 1 weight part of sodium chloride, ferric chloride 1 part by weight, 1 part by weight of aluminum sulfate, 1 part by weight of boric acid, and 2 parts by weight of zinc chloride were ground uniformly and mixed.

[0049] 2) In a reaction kettle equipped with a stirrer, a thermometer and a condenser, add phosphoric acid in the reaction raw materials, stir and heat at the same time, the stirring speed is controlled at 50 rpm, and...

Embodiment 2

[0063] 1) Prepare raw materials according to the following weight ratio:

[0064] Demineralized water 1.8kg

[0065] Phosphoric acid (concentration is 85%) 1.3kg

[0066] Urea (content 99%) 0.54kg

[0067] Catalyst: 0.0038kg

[0068] The catalyst is the same as in Example 1.

[0069] 2) In a reaction kettle equipped with a stirrer, a thermometer and a condenser, add phosphoric acid in the reaction raw materials, stir and heat at the same time, the stirring speed is controlled at 50 rpm, and the temperature rises to 50°C;

[0070] 3) Add urea in the reactor, and continue to stir the mixture of phosphoric acid and urea at the same time, so that the material is distributed and heated evenly;

[0071] 4) Continue heating to raise the temperature to 115°C, slowly and evenly add the catalyst into the reaction kettle to make the mixture react;

[0072] 5) After continuing to heat until the temperature reaches 135°C, observe the reaction phenomenon while continuing to heat. As th...

Embodiment 3

[0083] 1) Prepare raw materials according to the following weight ratio:

[0084] Demineralized water 1kg

[0085] Phosphoric acid (concentration is 85%) 0.65kg

[0086] Urea (content 99%) 0.38kg

[0087] Catalyst: 0.0028kg

[0088] Among them, the catalyst is a light yellow-green powder prepared by the Environmental Protection Flame Retardant Technology Center of the School of Materials Science and Technology, Beijing Forestry University. The raw materials include 0.8 parts by weight of tin chloride, 2.5 parts by weight of copper sulfate, 1.2 parts by weight of sodium chloride, ferric chloride 0.8 parts by weight, 0.8 parts by weight of aluminum sulfate, 0.8 parts by weight of boric acid, and 1.5 parts by weight of zinc chloride were uniformly ground and mixed.

[0089] 2) In a reaction kettle equipped with a mixer, a temperature and pressure display, and a condenser, add phosphoric acid in the reaction raw materials, stir while heating, control the stirring speed to 70 rp...

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Abstract

The invention discloses a flame retardant and a preparation method thereof. The flame retardant comprises the following raw materials in proportion by weight: phosphoric acid: 0.5-1.3; urea: 0.3-0.6; catalyst: 0.002-0.004. The flame retardant of the present invention is prepared into liquid or powder by polymerizing phosphoric acid and urea under the action of a catalyst. The preparation method of the flame retardant of the present invention is simple and quick, the production cost is low, and the use is convenient. The flame retardant of the invention is a water-based nitrogen-phosphorus inorganic flame retardant, which has the effect of one agent with double effects, not only has a remarkable flame retardant effect, but also has an obvious effect of absorbing formaldehyde. The flame retardant plywood prepared by the flame retardant of the invention has an oxygen index of more than 50%, has good smoke suppression performance, and produces non-toxic smoke. The environmental performance of the flame retardant can be stabilized at the E0 level (≤0.5mg / L).

Description

technical field [0001] The invention relates to a flame-retardant material and a preparation method thereof, in particular to a flame-retardant preparation for wood and a preparation method thereof. Background technique [0002] Wood and wood-based panels are widely used in interior decoration, furniture manufacturing, house construction and exterior decoration. These materials are combustible materials that can easily cause fires. How to improve the flame-retardant function of materials has become an issue of widespread concern around the world. [0003] At present, the most common way to prevent fires in wood and wood-based panels is to use flame retardants in these materials. Most of these flame retardants are based on compounds containing phosphorus, nitrogen, boron, aluminum and halogens. It is widely used because of its good performance, no toxic gas (except halogen flame retardants), no precipitation, no volatilization, low price, wide range of sources, and high safet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K21/04
Inventor 李光沛于志明李延章
Owner BEIJING FORESTRY UNIVERSITY
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