A kind of imidazole pyrophosphate flame retardant and preparation method thereof

A technology of flame retardant and flame retardant nylon, which is applied in the field of phosphorus nitrogen flame retardants, can solve problems such as flammability, achieve the effects of improving flame retardant efficiency, simple and practical preparation method, and improving mechanical properties

Active Publication Date: 2022-05-31
JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polymer materials are widely used in various fields, but they are extremely flammable

Method used

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  • A kind of imidazole pyrophosphate flame retardant and preparation method thereof
  • A kind of imidazole pyrophosphate flame retardant and preparation method thereof
  • A kind of imidazole pyrophosphate flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 10 kilograms of 85% phosphoric acid solution to the reaction kettle, the rotating speed is raised to 60rmp, and the temperature is raised to 100°C. The imidazole saturated aqueous solution was added by spraying, wherein the imidazole content was 12.25 kg. After 1 hour of reaction, the mixture was distilled under reduced pressure to remove water to obtain 20.5 kg of white solid of imidazolium phosphate. The imidazolium phosphate salt was added to the vacuum kneader, the rotation speed was increased to 50 rpm, replaced with nitrogen for more than three times, the temperature was raised to 280° C., and the reaction was carried out for 3 hours to obtain the imidazole pyropolyphosphate.

Embodiment 2

[0042] Add 10 kilograms of 85% phosphoric acid solution to the reaction kettle, the rotating speed is raised to 60rmp, and the temperature is raised to 100°C. The imidazole saturated aqueous solution was added in a spraying manner, wherein the imidazole content was 12.25 kg, and the pH of the solution was regulated to 5-6 to stop adding the imidazole saturated aqueous solution. After reacting for 1 hour, the mixture was distilled under reduced pressure to remove water to obtain 22.7 kg of a white solid of imidazolium phosphate. The imidazolium phosphate salt was added to the vacuum kneader, the rotation speed was increased to 50 rpm, replaced with nitrogen for more than three times, the temperature was raised to 280° C., and the reaction was carried out for 3 hours to obtain the imidazole pyropolyphosphate.

Embodiment 3

[0044] Add 10 kilograms of 85% phosphoric acid solution to the reaction kettle, the rotating speed is raised to 60rmp, and the temperature is raised to 100°C. The imidazole saturated aqueous solution was added in a spraying manner, wherein the imidazole content was 12.25 kg, and the pH of the solution was regulated to 5-6 to stop adding the imidazole saturated aqueous solution. After reacting for 1 hour, the mixture was distilled under reduced pressure to remove water to obtain 23.1 kg of a white solid of imidazolium phosphate. The imidazolium phosphate salt was added to the vacuum kneader, the rotating speed was increased to 50 rpm, replaced with nitrogen for more than three times, the temperature was raised to 300° C., and the reaction was carried out for 1.5 hours to obtain the imidazole pyropolyphosphate.

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PUM

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Abstract

The invention discloses an imidazole pyrophosphate flame retardant and a preparation method thereof. In the reaction device, phosphoric acid is mixed with imidazole or its derivatives, and after reaction, imidazolium phosphate is obtained. Imidazolium phosphate is dehydrated under an inert atmosphere or in a high-boiling solvent to prepare imidazole pyrophosphate, and the reaction temperature is 250°C-300°C. Imidazole pyrophosphate is a new type of phosphorus-nitrogen synergistic environmental protection flame retardant. The imidazole ring is not only a nitrogen source provider, but its fused ring structure can effectively induce carbon formation and improve the flame retardant efficiency. The imidazole pyrophosphate has high cost performance, and the preparation method is simple and practical, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of phosphorus-nitrogen flame retardants, and particularly designs a pyropolyphosphoric imidazole flame retardant and a preparation method thereof. Background technique [0002] Polymer materials are widely used in various fields, but they are extremely flammable. Flame retardants can effectively inhibit the flammability of polymer materials and reduce the risk of fire. Early halogen-containing flame retardants were widely used, but with the improvement of environmental protection requirements, the amount of halogen-free flame retardants increased year by year and became the development trend of flame retardants. Phosphorus-nitrogen flame retardants have excellent performance among halogen-free flame retardants due to the synergistic effect of phosphorus-nitrogen. However, there are few types of phosphorus-nitrogen flame retardants on the market, mainly ammonium polyphosphate and melamine polyphosphate. SUMMARY OF ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/32C08K5/3445C08L77/06C08L23/06C08K13/04C08K7/14C08K13/06C08K9/08C07D233/58C07D233/84
CPCC08L77/06C07D233/58C07D233/84C08L2201/02C08J5/08C08J5/10C08K2003/321C08L2201/22C08L23/26C08K9/08C08K7/14C08K5/3445C08K3/32Y02P20/52
Inventor 闻辉刘渊吴建国陈荣
Owner JIANGSU JICUI ADVANCED POLYMER MATERIAL RES INST CO LTD
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