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Melamine polymer type intumescent flame retardant and preparation method and application thereof

A technology of intumescent flame retardant and melamine, which is applied in the field of melamine polymer type intumescent flame retardant and its preparation, can solve the problems of narrow application range, low flame retardant efficiency, low content of flame retardant elements, etc., and achieves strong water resistance. , Good compatibility, little effect on processing performance

Active Publication Date: 2013-09-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new melamine polymer expansion flame retardant for the defects of low flame retardant element content, low flame retardant efficiency and narrow application range in the prior art. Flame retardant, the flame retardant has high phosphorus and nitrogen content and excellent flame retardant efficiency

Method used

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  • Melamine polymer type intumescent flame retardant and preparation method and application thereof
  • Melamine polymer type intumescent flame retardant and preparation method and application thereof
  • Melamine polymer type intumescent flame retardant and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Add 0.4 mol of phosphorus oxychloride and 111 ml of triethylamine into 200 ml of benzene and stir evenly, then slowly add 0.8 mol of ethyl carbamate dissolved in 200 ml of benzene into it dropwise while stirring, when the solution of ethyl carbamate After more than half of the dropwise addition, raise the temperature to 70°C, and react for 8 hours after the dropwise addition is complete; lower the temperature to 40°C, add 0.4 mol ethanol and 55 ml triethylamine to the system, stir and react for 0.5 hour, and then distill off the solvent; Disperse 0.4 mol of melamine in 400 ml of m-cresol, then add it to the reaction system, raise the temperature and stir to 190°C for 8 hours, and after the reaction, filter the reaction product, wash it, and dry it in a vacuum oven at 80°C. Obtain yellow powder melamine polymer type intumescent flame retardant PMPC1.

Embodiment 2

[0043] Add 0.4 mol of phosphorus oxychloride and 70 ml of pyridine into 200 ml of benzene and stir evenly, then slowly add 0.88 mol of methyl carbamate dissolved in 200 ml of benzene into it dropwise while stirring, when the methyl carbamate solution is added dropwise After more than half, raise the temperature to 60°C, and react for 9 hours after the dropwise addition is complete; lower the temperature to 30°C, add 0.36mol methanol and 29ml pyridine to the system, stir and react for 0.5 hours, and then distill off the solvent; disperse 0.44mol melamine In 400 ml of dimethyl sulfoxide, then added to the reaction system, heated and stirred to 180 ° C for 7 hours, after the reaction, the reaction product was filtered, washed, and dried in a vacuum oven at 80 ° C to obtain a yellow powder Melamine polymer intumescent flame retardant PMPC2.

Embodiment 3

[0045] Add 0.4 mol of phosphorus oxychloride and 100 ml of triethylamine into 200 ml of xylene and stir evenly, then slowly add 0.72 mol of ethyl carbamate dissolved in 200 ml of xylene dropwise while stirring, when the ethyl carbamate After more than half of the ester solution has been added dropwise, raise the temperature to 80°C, and react for 8 hours after the dropwise addition is complete; lower the temperature to 40°C, add 0.44mol n-propanol and 60ml triethylamine to the system, stir and react for 1 hour, and then distill Remove the solvent; disperse 0.36mol melamine in 400 ml of nitrogen-methylpyrrolidone, then add it to the reaction system, raise the temperature and stir to 190°C for 9 hours, after the reaction, filter the reaction product, wash it, and place it in a vacuum at 80°C Dry in an oven to obtain yellow powder melamine polymer type intumescent flame retardant PMPC3.

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Abstract

The invention discloses a melamine polymer type intumescent flame retardant which has the structure as shown in the specification, wherein R is a monohydric alcohol group of aliphatic series, and n ranges from 1 to 100. The invention also discloses a preparation method and application of such intumescent flame retardant. The novel intumescent flame retardant prepared by the preparation method is outstanding in flame retardant performance and smoke suppression, free of halogen, harmless, and high in water resistance and compatibility; the preparation method is simple and easy to carry out and control and convenient for industrial production.

Description

technical field [0001] The invention belongs to the technical field of intumescent flame retardant and its preparation method and application, and in particular relates to a melamine polymer type intumescent flame retardant and its preparation method and application. Background technique [0002] When intumescent flame retardants are used in flame retardant polymers, not only will the thermal decomposition of the condensed phase promote the formation of a coke layer of solid phase products due to heating, but also the gas phase will release inert gases. The charcoal layer expands. This kind of carbon layer can play the role of heat insulation, oxygen insulation, smoke suppression and droplet prevention, and has low smoke and low toxicity, which is very consistent with the sustainable development strategy of environmental protection and flame retardant requirements. [0003] However, traditional intumescent flame retardant systems such as ammonium polyphosphate-pentaerythrit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G71/02C07F9/6521C08L63/00C08L67/06C08L23/00C08L75/02C08K5/5399
Inventor 王玉忠吕强陈明军赵婧谭翼许召赞黄鉴前陈力汪秀丽
Owner SICHUAN UNIV
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