Preparation method of intumescent flame retardant based on piperazine pyrophosphate/melamine cyanurate/ammonium polyphosphate

A technology of melamine cyanurate and intumescent flame retardant, which is applied in the field of preparation of new intumescent flame retardants, can solve problems such as low production efficiency and inability to realize continuous production, and achieve improved production efficiency, novel structure, The effect of precise formula ratio

Active Publication Date: 2022-02-08
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of this method is that continuous production cannot be realized and the production efficiency is low.

Method used

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  • Preparation method of intumescent flame retardant based on piperazine pyrophosphate/melamine cyanurate/ammonium polyphosphate
  • Preparation method of intumescent flame retardant based on piperazine pyrophosphate/melamine cyanurate/ammonium polyphosphate
  • Preparation method of intumescent flame retardant based on piperazine pyrophosphate/melamine cyanurate/ammonium polyphosphate

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Using phosphoric acid and anhydrous piperazine as raw materials, weigh the molar ratio of phosphoric acid and anhydrous piperazine to be 2.3:1, add anhydrous piperazine to 85wt% phosphoric acid aqueous solution, heat to 80°C, and fully stir for 4 hours , and finally the piperazine phosphate was obtained through the steps of ice bath, standing, and drying. Put the prepared piperazine phosphate into the crushing equipment for crushing, and crush the piperazine phosphate to an average particle size of 20 microns; place the crushed piperazine phosphate powder in the calcining equipment, and heat at 280°C under the protection of nitrogen 0.5 hours. The material obtained continues to be pulverized and calcined according to the above-mentioned steps, and the pulverization-calcination process is carried out 3 times to obtain piperazine pyrophosphate. After the prepared piperazine pyrophosphate and melamine cyanurate were mixed according to the weight ratio of 4:1, the mixture ...

Embodiment 2

[0034] Using phosphoric acid and anhydrous piperazine as raw materials, weigh the molar ratio of phosphoric acid and anhydrous piperazine to be 2.4:1, add anhydrous piperazine to 30wt% phosphoric acid aqueous solution, heat to 85°C, and fully stir for 2.5 hours , and finally the piperazine phosphate was obtained through the steps of ice bath, standing, and drying. Put the prepared piperazine phosphate into the crushing equipment for crushing, and crush the piperazine phosphate to an average particle size of 25 microns; place the crushed piperazine phosphate powder in the calcining equipment, and heat at 270°C under the protection of nitrogen 1 hour. The material obtained continues to be pulverized and calcined according to the above steps, and the pulverization-calcination process is carried out 4 times to obtain piperazine pyrophosphate. After the prepared piperazine pyrophosphate and melamine cyanurate were mixed according to the weight ratio of 4:1, the mixture was ball mi...

Embodiment 3

[0036] Using phosphoric acid and anhydrous piperazine as raw materials, weigh the molar ratio of phosphoric acid and anhydrous piperazine to be 2.4:1, add anhydrous piperazine to 30wt% phosphoric acid aqueous solution, heat to 85°C, and fully stir for 2.5 hours , and finally the piperazine phosphate was obtained through the steps of ice bath, standing, and drying. Put the prepared piperazine phosphate into the crushing equipment for crushing, and crush the piperazine phosphate to an average particle size of 25 microns; place the crushed piperazine phosphate powder in the calcining equipment, and heat at 270°C under the protection of nitrogen 1 hour. The material obtained continues to be pulverized and calcined according to the above steps, and the pulverization-calcination process is carried out 4 times to obtain piperazine pyrophosphate. After the prepared piperazine pyrophosphate and melamine cyanurate were mixed according to the weight ratio of 4:1, the mixture was ball mi...

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Abstract

The invention relates to a preparation method of an intumescent flame retardant based on piperazine pyrophosphate / melamine cyanurate / ammonium polyphosphate. The preparation method comprises the following specific preparation steps of: preparing piperazine phosphate; preparing piperazine pyrophosphate; preparing a piperazine pyrophosphate / melamine cyanurate flame retardant system; and preparing a piperazine pyrophosphate / melamine cyanurate / ammonium polyphosphate compound intumescent flame retardant.

Description

technical field [0001] The invention relates to a preparation method of a novel intumescent flame retardant, in particular to a preparation method of an intumescent flame retardant based on piperazine pyrophosphate / melamine cyanurate / ammonium polyphosphate. Background technique [0002] Flame retardant is an additive that can effectively increase the flame resistance of flammable substances, delay the burning speed, or prevent burning. It is widely used in construction, textile, electronics, aerospace, transportation and other fields. At the same time, it is also one of the fastest-growing products among many plastic additives. According to relevant reports, it is estimated that by 2025, China's flame retardant market demand will be 1.28 million tons. Compared with 2019, the compound growth rate is expected to reach 7.62. %. As of 2019, the global annual demand for flame retardants has exceeded 1.2 million tons, and it has become the second largest polymer material modifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/3492C08K5/3462C08K3/32C08L23/12
CPCC08K5/34928C08K5/3462C08K3/32C08K2003/323C08L2201/02C08L23/12
Inventor 刘洋王松陈泓旭陈琦丁展武卫东李三喜
Owner SHENYANG POLYTECHNIC UNIV
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