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Cyclic phosphorus-nitrogen synergistic halogen-free flame retardant

A flame retardant, phosphorus-nitrogen technology, applied in 2 fields, can solve the problems of multiple smog and toxic corrosive gas, secondary pollution, affecting immunity and regeneration system, etc., and achieves broad market application prospects, stable structure, good flame retardant effect of effect

Inactive Publication Date: 2014-10-01
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Halogenated flame retardants, especially brominated flame retardants, are the first type of flame retardants to be used, but they produce more smoke and toxic and corrosive gases during combustion, which will affect human immunity and regeneration systems, causing secondary damage. Pollution, even strong carcinogenic effect

Method used

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  • Cyclic phosphorus-nitrogen synergistic halogen-free flame retardant
  • Cyclic phosphorus-nitrogen synergistic halogen-free flame retardant
  • Cyclic phosphorus-nitrogen synergistic halogen-free flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A cyclic phosphorus nitrogen synergistic halogen-free flame retardant, named: 2,7-bis(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadioxan azole diphosphonic acid; the structure of this compound is shown below:

[0030]

[0031] 2,7-bis(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadiazole diphosphonic acid is a white or light yellow solid, and the product yield is 35 %~50%, the melting point is 88,7°C, the temperature at the maximum decomposition rate of thermogravimetric loss is 198.14°C, and the percentages of P, N, H, and C in the molecular structure are 20.66%, 18.66%, 7.33% and 32% respectively , suitable for flame retardant or chain extender of polymer materials. like figure 1 , figure 2 , image 3 shown; figure 1 Indicates that 3264cm -1 At the N-H stretching vibration absorption peak; 2930~2894cm -1 at -CH 2- CH 2 Stretching vibration absorption peak; 1394cm -1 It is the stretching vibration absorption peak of -P-NH; 1213.99cm -1 , 1310.41cm -1 , ...

Embodiment 2

[0034] A cyclic phosphorus nitrogen synergistic halogen-free flame retardant, named: 2,7-bis(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadioxan azole diphosphonic acid; the structure of this compound is shown below:

[0035]

[0036]2,7-bis(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadiazole diphosphonic acid is a white or light yellow solid, and the product yield is 35 %~50%, the melting point is 88,7°C, the temperature at the maximum decomposition rate of thermogravimetric loss is 198.14°C, and the percentages of P, N, H, and C in the molecular structure are 20.66%, 18.66%, 7.33% and 32% respectively It is suitable for flame retardant or chain extender of polymer materials.

[0037] In a reactor equipped with an argon protection device, a thermometer, and a feeder, add 0.15 mol of phosphorus oxychloride and 0.1 mol of dimethylamine hydrochloride, and at the same time add 150 ml of toluene as a solvent, and put 0.25 mol of triethylamine in the feeder , under magnetic s...

Embodiment 3

[0039] A cyclic phosphorus nitrogen synergistic halogen-free flame retardant, named: 2,7-bis(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadioxan azole diphosphonic acid; the structure of this compound is shown below:

[0040]

[0041] 2,7-bis(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadiazole diphosphonic acid is a white or light yellow solid, and the product yield is 35 %~50%, the melting point is 88,7°C, the temperature at the maximum decomposition rate of thermogravimetric loss is 198.14°C, and the percentages of P, N, H, and C in the molecular structure are 20.66%, 18.66%, 7.33% and 32% respectively It is suitable for flame retardant or chain extender of polymer materials.

[0042] with N 2 In the reactor of protective device, thermometer, feeder, add 0.6mol phosphorus oxychloride and 0.4mol dimethylamine hydrochloride, add 300ml ethyl acetate simultaneously as solvent, put 0.9mol triethylamine in feeder, in Under magnetic stirring, slowly drop triethylamine into t...

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Abstract

The invention relates to a cyclic phosphorus-nitrogen synergistic flame retardant, particularly a 2,7-di(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadiazolyldiphosphinic acid, belonging to the field of novel halogen-free flame retardants. The cyclic phosphorus-nitrogen synergistic halogen-free flame retardant 2,7-di(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadiazolyldiphosphinic acid compound structure has favorable symmetry and stability; the compound has higher phosphorus and nitrogen contents; the molecular structure comprises 4 P-N structures; and thus, the cyclic phosphorus-nitrogen synergistic halogen-free flame retardant has the advantages of high phosphorus-nitrogen synergistic effect, favorable heat stability, high carbonization rate, no toxicity and environmental protection.

Description

technical field [0001] The invention relates to a cyclic phosphorus nitrogen synergistic flame retardant, in particular to a 2,7-bis(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodi Oxadiazole diphosphonic acid belongs to the field of invention of novel halogen-free flame retardants. Background technique [0002] With the development of the polymer material industry, plastics, rubber, fibers and other synthetic materials are more and more widely used in the fields of textile, construction, chemical industry, military and transportation. At the same time, due to the flammability of polymer materials, flame retardant technology has received global attention. [0003] At present, according to the relationship between the flame retardant and the flame retardant substrate, the flame retardant can be divided into two categories: additive type and reactive type. The processing technology of high polymers flame-retardant with additive flame retardants is simple, and there are many types...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/5399C07F9/6587
Inventor 罗运军顾丽敏李杰葛震
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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