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Environment-friendly nano modified halogen-free flame retardant polypropylene and preparation method thereof

A flame-retardant polypropylene and nano-modification technology, which is applied in the field of polypropylene, can solve the problems of low mechanical properties of flame-retardant polypropylene, and achieve the effects of improving flame-retardant performance, less surface cracks, and good barrier effect

Inactive Publication Date: 2014-12-10
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of low mechanical properties of flame-retardant polypropylene in the prior art, and provide a nano-modified environmentally friendly halogen-free flame-retardant polypropylene and its preparation method. By adding nano-modified particles and additives, the polypropylene Improved impact resistance and flexural strength, improving its mechanical properties

Method used

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  • Environment-friendly nano modified halogen-free flame retardant polypropylene and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027]A nano-modified environmentally friendly halogen-free flame-retardant polypropylene, which consists of a polypropylene matrix, a halogen-free expansion flame retardant, a synergistic flame-retardant conductive filler, additives, nano-modified particles, a compatibilizer, an antioxidant, and a lubricant. In parts by weight: the polypropylene matrix is ​​composed of 66 parts of high-impact polypropylene; the halogen-free intumescent flame retardant is 20 parts of phosphorus-nitrogen series flame retardants; the synergistic flame-retardant conductive filler is 2 parts of carbon black with a particle size of 15nm; the additive is 3 parts of hollow glass microspheres with a particle size of 1 to 50 microns; the nano-modified particle is 1 part of nano-SiO modified by KH550 2 , KH550 and nano-SiO 2 The weight ratio is 1:100; the described compatibilizer is 5 parts of maleic anhydride grafted polypropylene; the described antioxidant is 1 part of phosphite antioxidant; the descr...

Embodiment 2

[0035] A nano-modified environmentally friendly halogen-free flame-retardant polypropylene, which consists of 66 parts of high-impact polypropylene, 2 parts of nano-carbon black, 20 parts of halogen-free expansion flame retardant, and 2 parts of hollow glass with a particle size of 1-50 microns Microbeads, 2 parts of nano-SiO modified by KH550 2 , 5 parts of maleic anhydride grafted polypropylene, 1 part of phosphite antioxidant and 2 parts of simethicone oil; wherein, the particle size of carbon black is 15nm, and the particle size of nano-modified particles is 10~40nm ; Halogen-free intumescent flame retardants are phosphorus nitrogen series flame retardants, the phosphorus content is 0~24%, the nitrogen content is 0~22%, and the particle size is 2~10um.

[0036] The specific preparation steps of a nano-modified environmentally friendly halogen-free flame-retardant polypropylene are: step 1, KH550 and nano-SiO 2 Mix by the weight ratio of 1:100, make nano-modified particle ...

Embodiment 3

[0043] A nano-modified environmentally friendly halogen-free flame-retardant polypropylene, which consists of 66 parts of high-impact polypropylene, 2 parts of nano-carbon black, 20 parts of halogen-free expansion flame retardant, and 1 part of hollow glass with a particle size of 1-50 microns Microbeads, 3 parts of nano-SiO modified by KH550 2 , 5 parts of maleic anhydride grafted polypropylene, 1 part of phosphite antioxidant and 2 parts of simethicone oil; wherein, the particle size of carbon black is 15nm, and the particle size of nano-modified particles is 10~40nm ; Halogen-free intumescent flame retardants are phosphorus nitrogen series flame retardants, the phosphorus content is 0~24%, the nitrogen content is 0~22%, and the particle size is 2~10um.

[0044] The specific preparation steps of a nano-modified environmentally friendly halogen-free flame-retardant polypropylene are: step 1, KH550 and nano-SiO 2 Mix by the weight ratio of 1:100, make nano-modified particle A...

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Abstract

The invention discloses environment-friendly nano modified halogen-free flame retardant polypropylene and a preparation method thereof. The environment-friendly nano modified halogen-free flame retardant polypropylene comprises the following raw materials in parts by weight: 66 parts of polypropylene matrix, 20 parts of halogen-free expanded flame retardant, 2 parts of conductive packing, 1-3 parts of nano modified particles, 1-3 parts of additive, 5 parts of compatilizer, 1 part of an antioxidant and 2 parts of a lubricating agent. The preparation method comprises the following steps: evenly mixing the polypropylene matrix, the compatilizer, the antioxidant and the lubricating agent by virtue of a high-speed mixer, and then putting the mixed material into a precision open mill; after the mixed material is melted, adding the halogen-free expanded flame retardant and the conductive packing, melting and mixing; and then adding the nano modified particles and the additive; and mixing in the precision open mill, thus obtaining polypropylene. According to the environment-friendly nano modified halogen-free flame retardant polypropylene, the nano modified particles and hollow glass beads are adopted as flame retardant synergists, so that the flame retardant property of the polypropylene can be improved, the viscosity of polypropylene polymer melt can also be significantly reduced, the processability is improved, the heat stability is improved, and the environment-friendly nano modified halogen-free flame retardant polypropylene is excellent in yellowing resistance, good in impact resistance and good in bending strength.

Description

technical field [0001] The invention relates to the field of polypropylene, in particular to a nano-modified environmentally friendly halogen-free flame-retardant polypropylene and a preparation method thereof. Background technique [0002] According to "Polymer Combustion and Flame Retardant Technology" (edited by Zhang Jun, Ji Kuijiang, Xia Yanzhi, etc., Chemical Press, April 2005), polypropylene itself is a flammable material, and its oxygen index is only 17.0~18.0%, and The char formation rate is low, and it is easy to produce 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. Halogenated flame retardants have been banned in many countries due to the large amount of smoke and the corrosive hydrogen halide gas released. [0003] According to "Advanced Polymer Processing Technology" (Polymers for Advanced Technologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/06C08K9/06C08K3/04C08K7/28C08K3/36
CPCC08L23/12C08L2201/02C08L2201/22C08L2205/03C08L2205/08C08L51/06C08L83/04C08K13/06C08K9/06C08K3/36C08K3/04C08K7/28C08K5/524
Inventor 张炎斌刘继纯魏风军于卓立
Owner HENAN UNIV OF SCI & TECH
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