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Nano-sphere with elements of silicon, cobalt and like as well as synergetic ammonium polyphosphate flame resistant polypropylene material thereof

A technology of flame-retardant polypropylene and nano-microspheres, which is applied in the field of flame-retardant polypropylene materials, can solve the problems of endangering life and property safety, polypropylene is flammable, and has a fast burning speed, and achieves less secondary pollution and flame retardant. Efficiency enhancement and dosage reduction effect

Active Publication Date: 2015-07-01
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polypropylene (PP) is one of the five general-purpose resins with excellent performance. It is widely used in many industries due to its advantages of easy processing, excellent mechanical properties, and non-toxicity. However, polypropylene is flammable, with high calorific value and slow burning speed. Fast, accompanied by smoke and dripping, prone to fire, seriously endangering people's lives and property safety

Method used

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  • Nano-sphere with elements of silicon, cobalt and like as well as synergetic ammonium polyphosphate flame resistant polypropylene material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: take by weighing 600 grams of polypropylene pellets, 260 grams of ammonium polyphosphate, 30 grams of pentaerythritol, 110 grams of nano-microspheres containing elements such as silicon and cobalt, and mix the above pellets in a high-speed mixer. Under the conditions of conventional feeding speed, temperature and screw speed, feed into a twin-screw extruder, extrude, cool, and granulate to obtain the nano-microspheres containing silicon, cobalt and other elements of the present invention synergistically with ammonium polyphosphate flame-retardant polypropylene. The limiting oxygen index is 35.5%, the vertical combustion is V-0, the carbon residue rate at 600°C is 32.7%, and there is no droplet phenomenon.

Embodiment 2

[0030] Embodiment 2: take by weighing 700 grams of polypropylene pellets, 220 grams of ammonium polyphosphate, 30 grams of pentaerythritol, 50 grams of nano-microspheres containing elements such as silicon and cobalt, and mix the above pellets in a high-speed mixer. Under the conditions of conventional feeding speed, temperature and screw speed, feed into a twin-screw extruder, extrude, cool, and granulate to obtain the nano-microspheres containing silicon, cobalt and other elements of the present invention synergistically with ammonium polyphosphate flame-retardant polypropylene. The limiting oxygen index is 29.3%, the vertical combustion is V-0, the carbon residue rate at 600°C is 10.8%, and there is no droplet phenomenon.

Embodiment 3

[0031]Embodiment 3: take by weighing 700 grams of polypropylene pellets, 190 grams of ammonium polyphosphate, 30 grams of pentaerythritol, 80 grams of nano-microspheres containing elements such as silicon and cobalt, and mix the above pellets in a high-speed mixer. Under the conditions of conventional feeding speed, temperature and screw speed, feed into a twin-screw extruder, extrude, cool, and granulate to obtain the nano-microspheres containing silicon, cobalt and other elements of the present invention synergistically with ammonium polyphosphate flame-retardant polypropylene. The limiting oxygen index is 26.3%, the vertical combustion is V-2, the carbon residue rate at 600°C is 22.1%, and there is no obvious droplet phenomenon.

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Abstract

The invention discloses a nano-sphere with elements of silicon, cobalt and the like as well as a synergetic ammonium polyphosphate flame resistant polypropylene material thereof. The nano-sphere with elements of silicon, cobalt and the like takes vinyl trimethoxy silane as a monomer to prepare a vinyl silicone resin nano-sphere under an alkaline condition; by clicking a chemical method, thioglycollic acid is connected on the vinyl silicone resin nano-sphere; cobalt acetate reacts with the thioglycollic acid on the surface of the vinyl silicone resin nano-sphere to prepare the nano-sphere with elements of silicon, cobalt and the like. The synergetic ammonium polyphosphate flame resistant polypropylene material of the nano-sphere with elements of silicon, cobalt and the like is prepared by mixing polypropylene particles, ammonium polyphosphate, pentaerythritol and the nano-sphere with elements of silicon, cobalt and the like in a mass percentage of (60-80):(16-25):(3):(2-11) at a high speed, extruding through a twin screw extruder, cooling and pelletizing. The flame resistant polypropylene material is simple in formula, high in flame resistant efficiency, good in thermal stability, capable of generating a stable compact carbon layer during burning, free of molten drops and low in smoke amount.

Description

technical field [0001] The invention relates to the flame-retardant technical field of polypropylene materials, in particular to a flame-retardant polypropylene material containing silicon, cobalt and other element nano-microspheres and ammonium polyphosphate synergistically. Background technique [0002] Polypropylene (PP) is one of the five general-purpose resins with excellent performance. It is widely used in many industries due to its advantages of easy processing, excellent mechanical properties, and non-toxicity. However, polypropylene is flammable, with high calorific value and slow burning speed. Fast, accompanied by smoke and dripping, prone to fire, seriously endangering people's lives and property safety. With the continuous development of polypropylene application fields and the continuous increase in the number of applications, the requirements for the flame retardancy of polypropylene are also getting higher and higher. [0003] In the actual flame retardant ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L83/08C08K13/02C08K3/32C08K5/053C08G77/398C08G77/392
CPCC08G77/392C08G77/398C08L23/12C08L2201/02C08L2201/08C08L2205/18C08L83/08C08K2003/323C08K5/053
Inventor 王新龙居亚庆王佳辉
Owner NANJING UNIV OF SCI & TECH
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