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Phosphorus-nitrogen flame retardant and preparation method thereof

A phosphorus-nitrogen flame retardant and solvent technology, applied in the field of phosphorus-nitrogen flame retardant and its preparation, can solve the problems of threatening human life and property safety, releasing a large amount of smoke, dust and poisonous gas, application restrictions and prohibitions, etc., and achieves easy operation. , The effect of less toxic gas and less smoke

Inactive Publication Date: 2022-02-18
洛阳赛图新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since most polymer materials are combustible or flammable in the air, they generate high heat when ignited and burn, and release a large amount of smoke and poisonous gas, which seriously threatens human life and property safety, and at the same time causes environmental pollution. Therefore, improving the flame retardant properties of polymer materials has become a technical and social issue of increasing concern, which provides a broad market space for the research and development of flame retardants
[0003] Traditional halogenated flame retardants will release a lot of smoke, corrosive hydrogen halides and toxic gases (such as benzofuran and dioxin) during the combustion process, endangering people's health and causing environmental pollution. leading to its application being gradually restricted and banned

Method used

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  • Phosphorus-nitrogen flame retardant and preparation method thereof
  • Phosphorus-nitrogen flame retardant and preparation method thereof
  • Phosphorus-nitrogen flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 216g of phosphorus-containing compound DOPO, 174g of toluene diisocyanate (TDI), and 1g of 2-methylimidazole into 1000g of solvent methylene chloride, set the temperature at 60°C, and react for 10 hours under stirring.

[0027] The resulting product liquid was rotary evaporated to remove the solvent, and the remaining solid product was dried at 50°C for 2 hours to obtain a phosphorus-nitrogen flame retardant with a yield of about 97.3%. Its structural formula is as follows: figure 1 shown.

Embodiment 2

[0029] Add 432g of phosphorus-containing compound DOPO, 250g of diphenylmethane diisocyanate (MDI), and 1.2g of 2-ethyl-4-methyl into 1200g of solvent cyclohexanone, set the temperature at 65°C, and react for 12 hours under stirring .

[0030] The resulting product liquid was rotary evaporated to remove the solvent, and the remaining solid product was dried at 50°C for 2 hours to obtain a phosphorus-nitrogen flame retardant with a yield of about 96.8%. Its structural formula is as follows: figure 2 shown.

Embodiment 3

[0032] Add 216g of phosphorus-containing compound DOPO, 262.4g of dicyclohexylmethane diisocyanate (HMDI), 1.6g of 2-undecylimidazole into 1500g of solvent acetone, set the temperature at 55°C, and react for 14h under stirring.

[0033] The resulting product liquid was rotary evaporated to remove the solvent, and the remaining solid product was dried at 50°C for 2 hours to obtain a phosphorus-nitrogen flame retardant with a yield of about 98.1%. Its structural formula is as follows: image 3 shown.

[0034] from Figure 4 It can be seen that: compared with the raw material phosphorus-containing compound DOPO, the 2384cm-1P-H characteristic peak of the phosphorus-containing compound DOPO completely disappears, and the 1660cm-1 amide C=O characteristic peak and 1511cm-1 amide N-H characteristic peak are obvious, indicating that the reaction synthesis is implemented Example 2 product.

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Abstract

The invention discloses a phosphorus-nitrogen flame retardant and a preparation method thereof. The phosphorus-nitrogen flame retardant is prepared from the following raw materials: isocyanate, a phosphorus-containing compound DOPO, a solvent and a catalyst, wherein isocyanate includes toluene diisocynate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate and polyisocyanate; and the solvent comprises one or more of benzene, methylbenzene, dimethylbenzene, acetone, butanone, cyclohexanone, dichloromethane, trichloromethane and petroleum ether, a catalyst is added into the solvent, and the catalyst is an imidazole catalyst. The phosphorus-nitrogen flame retardant disclosed by the invention has the advantages of low smoke, low toxicity, high efficiency, good thermal stability, good compatibility with a polymer substrate, migration and volatilization resistance, lasting flame-retardant effect and the like. According to the preparation method provided by the invention, the phosphorus-nitrogen flame retardant can be prepared through a one-step addition reaction, the process steps are simple, the operation is easy, and the preparation method is suitable for large-scale popularization.

Description

technical field [0001] The invention belongs to the technical field of polymer flame retardants, in particular to a phosphorus nitrogen flame retardant and a preparation method thereof. Background technique [0002] Polymer materials have the advantages of excellent chemical corrosion resistance, mechanical properties, heat resistance and light weight, and are widely used in aviation, aerospace, electronics, machinery, chemical and other fields. However, since most polymer materials are combustible or flammable in the air, they generate high heat when ignited and burn, and release a large amount of smoke and poisonous gas, which seriously threatens human life and property safety, and at the same time causes environmental pollution. Therefore, improving the flame retardant properties of polymer materials has become a technical and social issue of increasing concern, which provides a broad market space for the research and development of flame retardants. [0003] Traditional...

Claims

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Application Information

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IPC IPC(8): C07F9/6574C08K5/5313
CPCC07F9/657172C08K5/5313
Inventor 邵飞王静李勇
Owner 洛阳赛图新材料科技有限公司
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