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Cross-linked phosphorus-containing macromolecular expansion flame-retardant char-forming agent and its preparation method and application

A technology of intumescent flame retardant and cross-linked structure, which is applied in the field of intumescent flame-retardant carbon-forming agent and its preparation of phosphorus-containing macromolecules in cross-linked structure, can solve the problem that the mechanical properties and flame retardant properties of materials are affected, and the water resistance and migration resistance are not ideal. , the problem of unsatisfactory flame retardant effect, etc., to achieve the effect of limiting oxygen index and vertical combustion level improvement, strong water resistance, and good charcoal

Active Publication Date: 2017-02-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, most of the char-forming agents synthesized in the existing reports have poor char-forming effects, so the flame-retardant effect is not ideal.
In addition, the char-forming agents synthesized in previous reports are mainly small molecules or linear macromolecular compounds, so their water resistance and migration resistance in polymers are not ideal, which affects the mechanical properties and flame retardancy of materials. Difficult to be widely used

Method used

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  • Cross-linked phosphorus-containing macromolecular expansion flame-retardant char-forming agent and its preparation method and application
  • Cross-linked phosphorus-containing macromolecular expansion flame-retardant char-forming agent and its preparation method and application
  • Cross-linked phosphorus-containing macromolecular expansion flame-retardant char-forming agent and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Add 1 mol of anhydrous piperazine that has been dried beforehand into 1L of chloroform, stir to disperse evenly under nitrogen protection, then add 2.0 mol of triethylamine acid-binding agent at 20°C, and then add 0.67 mol of phosphorus oxychloride, after the dropwise addition, the temperature was raised to 60°C, and the reaction was carried out for 12 hours. After the reaction was completed, the chloroform was removed, and 1L of water was added to the remaining solid, stirred and beaten, and then suction filtered. Repeat this process 3 times to obtain a light yellow solid. After drying It is the charcoal agent CA-1.

Embodiment 2

[0046] Add 1 mol of anhydrous piperazine that has been dried beforehand into 1L of toluene, stir to disperse evenly under the protection of nitrogen, then add 2.1 mol of triethylamine acid-binding agent at 40°C, and then add 0.68 mol of phosphorus oxychloride, after the dropwise addition, the temperature was raised to 110°C, and the reaction was carried out for 6 hours; after the reaction was completed, the toluene was removed, 1L of water was added to the remaining solid, stirred and beaten, and then suction filtered, and the process was repeated 3 times to obtain a light yellow solid. It is the charcoal agent CA-1.

Embodiment 3

[0048] Add 1 mol of ethylene glycol into 1L of 1,4-dioxane, under the protection of nitrogen, stir to disperse evenly, then add 1.9 mol of triethylamine acid-binding agent at 10°C, then add dropwise while stirring 0.70mol phosphorus oxychloride, after the dropwise addition, raise the temperature to 100°C, and react for 6 hours; after the reaction is completed, remove 1,4-dioxane, add 1L water to the remaining solid, stir and beat, then suction filter, repeat the process 3 times , to obtain a white solid, which is charcoal agent CA-2 after drying.

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Abstract

The invention discloses a phosphorus-containing macromolecular intumescent flame-retardant charring agent with a cross-linked structure as well as a preparation method and an application thereof. A structural general formula of the phosphorus-containing macromolecular intumescent flame-retardant charring agent is as shown in the specification, wherein X, Y and Z are any one of diamine, diol group, alkylol amine or diphenol, and can be the same, and can also be different. The invention further relates to a preparation method of the flame-retardant charring agent, and an application of the flame-retardant charring agent as a carbon source of a novel intumescent flame-retardant system, and an application of novel intumescent flame-retardant system in polyolefin, polyurethane, polylactic acid, polyamide and epoxy resin. The intumescent flame-retardant charring agent prepared by the method has good charring property, and is free of halogen, low in toxicity and high in water resistance, good in compatibility with a plurality of flame-retardant high polymers, relatively small in effects on mechanical property, simple in synthesis process, easy to control, and easy to put into industrial production.

Description

technical field [0001] The invention belongs to the technical field of an intumescent flame-retardant char-forming agent and its preparation method and application, and in particular relates to a cross-linked phosphorus-containing macromolecule intumescent flame-retardant char-forming agent and its preparation method and application. Background technique [0002] With the development of science and technology, polymer materials are more and more widely used in aerospace, electronic appliances, automobiles, building materials, home decoration, packaging films and other fields. However, polymer materials, especially polyolefins, polyurethanes, polylactic acid, polyamides, and epoxy resins, have the problems of poor flame resistance and easy droplet, which largely limits their wide application. Therefore, it is of great practical significance to carry out flame-retardant modification on flammable polymer products to obtain flame-retardant polymer materials with excellent compre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L85/02C08G79/02C08G79/04C08L23/08C08L23/06C08L23/12C08L75/04C08L67/04C08L77/06C08L63/00
Inventor 王玉忠董亮平邓聪李瑞敏曹志杰林玲陈力
Owner SICHUAN UNIV
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