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Three-sources-integrated intumescent flame retardant, and synthesis method and application thereof

A technology of intumescent flame retardant and synthesis method, which is applied in chemical instruments and methods, compounds of Group 5/15 elements of the periodic table, organic chemistry, etc. problems, to achieve the effect of high synthesis efficiency, mild reaction conditions and safe operation

Inactive Publication Date: 2018-02-02
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of low flame retardant efficiency, poor thermal stability and difficult processing existing in the existing intumescent flame retardants, and provides a three-source intumescent flame retardant and its synthesis method and application

Method used

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  • Three-sources-integrated intumescent flame retardant, and synthesis method and application thereof
  • Three-sources-integrated intumescent flame retardant, and synthesis method and application thereof
  • Three-sources-integrated intumescent flame retardant, and synthesis method and application thereof

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specific Embodiment approach 1

[0034] Specific implementation mode 1: The structural formula of the three-source intumescent flame retardant in this implementation mode is:

[0035]

[0036] where n≥1.

specific Embodiment approach 2

[0037] Specific embodiment two: The synthesis method of the three-source intumescent flame retardant in this embodiment includes the following steps:

[0038] 1. Add piperazine and distilled water to a four-neck flask equipped with a stirring device, a constant pressure dropping funnel, a thermometer and a reflux condenser. The mass ratio of piperazine and distilled water is 1:1, and heat until completely dissolved;

[0039] Add distilled water to the methylphosphonic acid to dissolve the methylphosphonic acid at room temperature to obtain a saturated aqueous solution of methylphosphonic acid, drop the saturated aqueous solution of methylphosphonic acid into a four-necked flask through a constant pressure dropping funnel, and add dropwise After completion, raise the temperature of the system to 85-90°C, react at this temperature for 3-5 hours, then place the colorless, transparent, viscous liquid obtained in a rotary evaporator for concentration, and then put it in a vacuum dry...

specific Embodiment approach 3

[0041] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the molar ratio of methylphosphonic acid to piperazine in step 1 is 2:1. Others are the same as in the second embodiment.

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Abstract

The invention relates to an intumescent flame retardant, and a synthesis method and an application thereof, and concretely relates to a three-sources-integrated intumescent flame retardant, and a synthesis method and an application thereof. The problems to be solved are low flame retardation efficiency, poor thermal stability and difficulty in processing of existing intumescent flame retardants. The three-sources-integrated intumescent flame retardant is a methylphosphonic acid-piperazine-neopentyl glycol phosphate oligopolymer. The method comprises the following steps: 1, heating piperazine and distilled water, adding saturated methylphosphonic acid, and carrying out heating, reacting, concentrating and drying to obtain a white crystal intermediate di-methylphosphonopiperazine; and 2, adding neopentylene glycol and a solvent, carrying out heating, adding the white crystal intermediate di-methylphosphonopiperazine, heating the obtained solution to reflux the solution, cooing the refluxed solution, carrying out suction filtration and washing, and drying the obtained product to obtain the three-sources-integrated intumescent flame retardant. The flame retardant has the advantages ofgood char forming performance, high thermal stability, and high-efficiency flame retardation to polyethylene resin, and the preparation method has the advantages of mild reaction conditions, simplicity in operation, and safety. The flame retardant is used for realizing the flame retardation of the polyethylene resin.

Description

technical field [0001] The invention relates to an intumescent flame retardant and its synthesis method and application. Background technique [0002] Polyolefin materials are currently the most widely used general-purpose polymer materials, but such materials are flammable and produce a large number of molten droplets when burned, which can easily cause fires and seriously endanger public safety. Traditional halogen-containing flame retardants have high flame retardant efficiency for polyolefins, but they will generate a lot of smoke and corrosive toxic gases during combustion, and their applications are limited. Inorganic hydroxide has the characteristics of low smoke and low toxicity, but its flame retardant efficiency is low, and the addition amount is large, which has a great influence on the mechanical properties of the material. [0003] Intumescent flame retardant (IFR) has the advantages of low toxicity and low smoke. When heated, a uniform and dense carbon layer i...

Claims

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Application Information

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IPC IPC(8): C07F9/6509C08K5/524C08L23/06C08G79/04C08L85/02
Inventor 许苗军夏思禹李斌
Owner NORTHEAST FORESTRY UNIVERSITY
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