Application of a nitrogen-phosphorus high-efficiency flame retardant containing benzo-substituted melamine structure

A technology of benzo-substituted melamine and flame retardant, which is applied in the field of flame retardants, can solve the problems of poor flame retardant effect, low carbon formation rate of flame retardants, etc. Effect

Active Publication Date: 2021-08-27
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the preparation of epoxy resin flame retardants is often compounded with 9,10-dihydro-9-oxo-10-phosphaphenanthrene-10-oxide (DOPO), but the prepared flame retardant The carbon formation rate is relatively low, and the flame retardant effect is relatively poor

Method used

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  • Application of a nitrogen-phosphorus high-efficiency flame retardant containing benzo-substituted melamine structure
  • Application of a nitrogen-phosphorus high-efficiency flame retardant containing benzo-substituted melamine structure
  • Application of a nitrogen-phosphorus high-efficiency flame retardant containing benzo-substituted melamine structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A nitrogen-phosphorus high-efficiency flame retardant containing a benzomelamine structure has the following structural formula:

[0025]

[0026] The synthesis of the nitrogen-phosphorus high-efficiency flame retardant containing benzomelamine structure described in this embodiment comprises the following steps:

[0027] (1) Under the protection of nitrogen, add benzomelamine and salicylaldehyde into the solvent at a molar ratio of 1:2, react at 60°C for 3 hours, and perform a Schiff base reaction to obtain salicylbenzomelamine solution , the solvent can use DMF, and the reaction equation in the reaction process is as follows;

[0028]

[0029] (2) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide equivalent to the molar amount of salicylaldehyde is added to the salicylic benzomelamine solution to make 9,10- Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and salicylic benzomelamine undergo a nucleophilic substitution reaction, the reaction time is 6 hours, and t...

Embodiment 2

[0037] A nitrogen-phosphorus high-efficiency flame retardant containing a benzomelamine structure has the following structural formula:

[0038]

[0039] The synthesis of the nitrogen-phosphorus high-efficiency flame retardant containing benzomelamine structure described in this embodiment comprises the following steps:

[0040] (1) Under the protection of nitrogen, mix benzomelamine and salicylaldehyde in a molar ratio of 1:2-2.5

[0041] Adding it to DMF, reacting at 90°C for 4 hours, performing Schiff base reaction to obtain salicylbenzomelamine solution;

[0042] (2) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide equivalent to the molar amount of salicylaldehyde is added to the salicylic benzomelamine solution to make 9,10- Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and salicylic benzomelamine undergo nucleophilic substitution reaction, the reaction time is 7 hours, and the reaction temperature is 90°C, to obtain salicylic benzo Melamine phosphaphenanthrene sol...

Embodiment 3

[0047] A nitrogen-phosphorus high-efficiency flame retardant containing a benzomelamine structure has the following structural formula:

[0048]

[0049] The synthesis of the nitrogen-phosphorus high-efficiency flame retardant containing benzomelamine structure described in this embodiment comprises the following steps:

[0050] (1) Under nitrogen protection, add benzomelamine and salicylaldehyde into the DMF solvent at a molar ratio of 1:2.1, react at 70°C for 3.5 hours, and perform a Schiff base reaction to obtain salicylbenzomelamine solution;

[0051] (2) 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide equivalent to the molar amount of salicylaldehyde is added to the salicylic benzomelamine solution to make 9,10- Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and salicylic benzomelamine undergo a nucleophilic substitution reaction, the reaction time is 6.5 hours, and the reaction temperature is 80°C to obtain, to obtain salicyl benzo Melamine phosphaphenanthrene sol...

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Abstract

The invention provides a nitrogen-phosphorus high-efficiency flame retardant containing a benzomelamine structure and its synthesis and application, and relates to the technical field of flame retardants. A nitrogen-phosphorus high-efficiency flame retardant containing benzomelamine structure has the following structural formula: the synthesis of the flame retardant of the present invention comprises the following steps: (1) under the protection of nitrogen, benzomelamine, salicylaldehyde Add in the solvent to obtain salicylbenzomelamine solution; (2) make 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and salicylbenzomelamine carry out affinity substitution reaction, obtaining a salicylic benzomelamine phosphaphenanthrene solution; (3) cooling the salicyl benzomelamine phosphaphenanthrene solution to obtain a nitrogen-phosphorus high-efficiency flame retardant containing a benzomelamine structure. Utilizing the carbon formation and thermal stability of the benzomelamine structure, and the characteristics of nitrogen-phosphorus conjugate synergistic flame retardancy, a flame retardant with better carbon formation rate and flame retardancy effect is obtained, and the yield is high.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to the application of a nitrogen-phosphorus high-efficiency flame retardant containing a benzomelamine structure. Background technique [0002] Resin is a kind of polymer material commonly used in daily life. Because of its good anti-oxidation and anti-corrosion properties, it is applied to many technical fields. However, the resin is flammable and has low safety. [0003] Epoxy resin is an important class of thermosetting plastics. Because of its good adhesion, electrical insulation and chemical stability, it is widely used in coatings, adhesives, electronic and electrical materials, engineering plastics and composite materials, civil engineering materials, etc. field. However, the limiting oxygen index of epoxy resin is very low, and it is extremely flammable. After a fire, it continues to burn and emits a large amount of smoke. Its flammability limits its application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/5313C08L63/00C07F9/6574
CPCC07F9/657181C08K5/5313C08L2201/02C08L63/00
Inventor 周红陈瑞胡开贤许明星潘志权
Owner WUHAN INSTITUTE OF TECHNOLOGY
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