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Metallic ion modified polyphosphoric acid melamine salt and its preparation method

A polyphosphate melamine salt and metal ion modification technology, applied in the field of phosphorus-nitrogen flame retardants, can solve the problems of low thermal stability, high acidity, and low flame retardancy

Inactive Publication Date: 2006-02-15
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a metal ion modified melamine polyphosphate salt and its preparation method in order to solve the shortcomings of existing melamine polyphosphate salts such as low thermal stability, high acidity in water, and low flame retardancy

Method used

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specific Embodiment approach 1

[0004] Embodiment 1: The metal ion-modified melamine polyphosphate salt of this embodiment is made of the following components by weight percentage: Oxygen: 21-25%, Carbon: 15-18%, Hydrogen: 1-3%, Phosphorus: 13% ~16%, nitrogen: 37~42%, metal ion: 0.2~6%.

specific Embodiment approach 2

[0005] Specific embodiment two: the preparation method of the metal ion-modified melamine polyphosphate salt of the present embodiment is: the first, metal hydroxide, oxide or carbonate are dissolved (reacted) or dispersed to a concentration of 80-90% In the phosphoric acid solution, the phosphoric acid solution containing dihydrogen phosphate is generated; the second, water and the phosphoric acid solution containing dihydrogen phosphate and melamine are reacted in a reaction kettle or in a ball mill for 1.5 to 2.5 hours, and the reaction temperature is 30 ~100°C; thirdly, the reacted product is taken out, filtered, dried, and crushed to obtain a modified melamine phosphate; fourthly, the modified melamine phosphate is heated at 260~330°C, and the polymerization reaction is 8~12 hours, the metal ion-modified polyphosphate melamine salt was obtained. The weight ratio of the metal hydroxide, oxide or carbonate to the phosphoric acid solution with a concentration of 80-90% is 1:...

specific Embodiment approach 3

[0006] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the reaction time in Step 2 is 2 hours, and the reaction temperature is 50-90°C. Other steps are the same as in the second embodiment.

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Abstract

The polyphosphoric cyanuric salt modified by metal ion comprises, oxygen 21~25wt%, carbon 15~18%, hydrogen 1~3%, phosphor 13~16%, nitrogen 37~42%, and metal ion 0.2~6%. The opposite preparation method comprises: dissolving or dispersing the metal hydroxides, oxide or carbonate into phosphoric acid solution with concentration as 80~90%; adding water, phosphoric acid solution with dihydric phosphate and melamine into kettle to react for two hours; heating the modified polyphosphoric cyanuric salt to 260~330Deg and taking polymerisation for 8~12h. The product has better thermallysis stability and flame retardant property to nylon. This method is simple, and has on-pollutant andhigh yield rate.

Description

Technical field: [0001] The invention relates to a phosphorus-nitrogen flame retardant with high thermal stability and a preparation process thereof. Background technique: [0002] Halogen-free flame retardant polymers are a hot spot in the research and development of polymer flame retardants, and melamine phosphate is one of the most active fields in the research and development of halogen-free flame retardants. Such as: melamine phosphate, melamine pyrophosphate, melamine polyphosphate, etc., their synthetic existing literature and patent reports, such as Japanese patents: JP 8-81480, JP 9-124670, JP2001026597; U.S. Patent 2001 / 0005745: Document "Melamine Phosphate Salt and Melamine Pyrophosphate Salt in Flame Retardant Coatings", Journal of Coatings Technology, 1994, 66(839): 75-82, etc. Initially, they were mainly used in intumescent fire retardant coatings as one of the main flame retardant components, and also in polyolefin halogen-free intumescent flame retardant. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/6521C08G79/02C08G79/04
Inventor 李斌汤飞孙才英李晓丽
Owner NORTHEAST FORESTRY UNIVERSITY
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