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Non-bittern swelling flame-proof polypropylene containing porous nickel phosphate and preparation method thereof

A technology of flame-retardant polypropylene and intumescent flame retardant, which is applied in the field of halogen-free intumescent flame-retardant polypropylene, and can solve the problems that porous nickel phosphate has not been reported.

Active Publication Date: 2008-03-12
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has good stability, and nickel itself is a good catalyst. At present, researchers mainly pay attention to its application prospects in adsorption, ion exchange, especially catalysis, but the research on porous nickel phosphate in flame retardancy has not been reported so far.

Method used

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  • Non-bittern swelling flame-proof polypropylene containing porous nickel phosphate and preparation method thereof
  • Non-bittern swelling flame-proof polypropylene containing porous nickel phosphate and preparation method thereof
  • Non-bittern swelling flame-proof polypropylene containing porous nickel phosphate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First prepare the synthetic porous nickel phosphate according to the method introduced in "Microporous and Mesoporous Materials" (Microporous and Mesoporous Materials; 85(3):355-364, 2005): Dissolve 106.5g nickel chloride hexahydrate in 314ml deionized In the water, add 55.56g of orthophosphoric acid dropwise under stirring; then add 16.68g of ammonium fluoride; finally add ammonia water to adjust the pH value to 2.5, stir for 0.5 hours, and transfer the mixed material into a polytetrafluoroethylene with a capacity of 500ml In a lined stainless steel synthesis kettle, the filling amount of the mixture is 70% of the volume of the synthesis kettle. Sealed and crystallized at 180°C and autogenous pressure for 144 hours; the obtained yellow-green solid product was washed 3 times with deionized water, first dried in the air, and then dried at 100°C to obtain the product porous nickel phosphate. spare.

[0020] The porous nickel phosphate obtained above was subjected to X-ra...

Embodiment 2

[0027]Dissolve 106.5g of nickel chloride hexahydrate in 314ml of deionized water, add 83.34g of orthophosphoric acid drop by drop under stirring; then add 26.69g of ammonium fluoride; finally add ammonia water to adjust the pH value to 1.8, stir for 0.5 hours after mixing , This mixed material is moved into a capacity of 500ml polytetrafluoroethylene lined stainless steel synthesis kettle, the mixture charge is 70% of the volume of the synthesis kettle. Sealed crystallization at 160°C and autogenous pressure for 72 hours; the obtained yellow-green solid product was washed three times with deionized water, first dried in air, and then dried at 100°C for use. The resulting product was subjected to X-ray diffraction analysis. Fig. 2 is the X-ray diffractogram of the porous nickel phosphate prepared at 160 ℃ of crystallization 72 hours in the present embodiment, same as embodiment Fig. 1, and "Journal of American Chemical Society" (J.Am.Chem.Soc 125: 1309, 2003) and the X-ray dif...

Embodiment 3

[0031] Dissolve 106.5g of nickel chloride hexahydrate in 314ml of deionized water, add 55.56g of orthophosphoric acid dropwise under stirring; then add 16.68g of ammonium fluoride; finally add ammonia water to adjust the pH value to 2.5, and stir for 0.5 hours. This mixed material was moved into a polytetrafluoroethylene-lined stainless steel synthesis kettle with a capacity of 500 ml, and the filling amount of the mixture was 70% of the volume of the synthesis kettle. Sealed crystallization at 190°C and autogenous pressure for 168 hours; the obtained yellow-green solid product was washed three times with deionized water, first dried in air, and then dried at 100°C for use. Figure 4 is a high-resolution electron microscope image of the porous nickel phosphate prepared in this example by crystallization at 190°C for 168 hours, which is consistent with "Microporous and Mesoporous Materials" (Microporous and Mesoporous Materials; 85(3): 355-364, 2005 ) consistent with the high-re...

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Abstract

The invention provides a halogen-free expanding flame-retarded polypropylene containing porous nickel phosphate and a preparing way for the polypropylene, which is characterized in that, the invention contains expanding fire retardant complexed by tetramethylolmethane: ammonium polyphosphate by mass 5.3 swung dash 8.2%:10.7 swung dash 16.3% or tetramethylolmethane: melamine ammonium polyphosphate by mass 5.3 swung dash 8.2%:10.7 swung dash 16.3%, also contains porous nickel phosphate. The total mass of each component is: polypropylene 75-80%, complexed expanding fire retardant 16-24.5%, porous nickel phosphate 0.5-4%, which is a porous structure in hole diameter 8-13. As containing porous nickel phosphate, the expanding fire retardant can greatly reduce the addition of the expanding fire retardant, and reduce the influence from the expanding fire retardant on the mechanical properties such as tensile and fracture strength, etc. of materials, improve obviously the fire resistance of polypropylene, solve the molten drop of polypropylene when it is burning; and the production and the use of the polypropylene are very convenient.

Description

Technical field: [0001] The invention belongs to the technical field of halogen-free intumescent flame-retardant polypropylene, in particular to polypropylene containing an intumescent flame retardant and porous nickel phosphate and a preparation method thereof. Background technique: [0002] According to "Modified Polypropylene New Materials" (edited by Zhao Min, Gao Jungang, etc., Chemical Press, September 2002), polypropylene itself is a flammable material, its oxygen index is only 17.0-18.0%, and the carbonization rate It is low and produces molten droplets when burning, so it is required to be flame-retardant modified in many applications. At present, the flame retardant of polypropylene is mainly used to add flame retardants at home and abroad. According to "Applied Surface Science" (Applied Surface Science, 120:14, 1997) and "Combustion Science" (J Fire Flam 2:97, 1971), the halogen-free additive flame retardant that has been used and can be used for flame retardant ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K5/3492C08K3/32
Inventor 胡源聂士斌宋磊
Owner UNIV OF SCI & TECH OF CHINA
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