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Process for increasing polyolefin nano composite material through catalytic charcoal forming

A technology of nanocomposite materials and flame retardant properties, which is applied in the field of catalytic carbonization to improve the flame retardant properties of polyolefin nanocomposites, which can solve the problems of material performance degradation and other problems, and achieve reduced combustion speed, reduced combustible gas content, and flame retardant efficiency. high effect

Inactive Publication Date: 2006-12-06
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the disadvantages of the generation of poisonous gas in the combustion process of materials in the above-mentioned prior art and the need to add a large amount of flame retardants to cause the degradation of material performance. Synergistic Effect of Soil Removal and Catalyst to Improve the Flame Retardancy of Polyolefin Nanocomposites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The polypropylene and the anhydrided polypropylene with a maleic anhydride content of 1% by weight are put into the internal mixer at the same time at a weight ratio of 90:10, and melted and mixed at 200°C and 70 rpm for 10 minutes to obtain a polypropylene mixture .

[0014] The above sample was made into a test piece with a size of 100mm×100mm×6mm by molding method, and the flame retardancy of the polymer was determined according to the cone calorimeter method specified in ASTM E 1354. The radiation intensity of the heater is 35 kW / m2. The peak heat release rate of the sample during combustion is 1850 kW / m2, and the combustion duration is 420 seconds.

Embodiment 2

[0016] Polypropylene, anhydrided polypropylene with a maleic anhydride content of 1% by weight, trimethylhexadecyl ammonium bromide-modified montmorillonite with a particle size of 10 microns, and a supported catalyst with a particle size of 30 microns At the same time, enter the internal mixer at a weight ratio of 80:10:5:5, and carry out melt mixing at 200° C. and 70 rpm for 10 minutes to obtain a polypropylene compound.

[0017] The above sample was made into a test piece with a size of 100mm×100mm×6mm by molding method, and the flame retardancy of the polymer was determined according to the cone calorimeter method specified in ASTM E 1354. The radiation intensity of the heater is 35 kW / m2. The peak heat release rate of the sample during combustion is 320 kW / m2, and the combustion duration is 1110 seconds.

Embodiment 3

[0019] According to weight ratio, 87.5% polypropylene, 7.5% maleic anhydride content of 2.5% anhydride polypropylene and 2.5% octadecyl ammonium chloride modified montmorillonite with a particle size of 30 microns, 2.5% granular The supported catalyst with a diameter of 20 microns was simultaneously put into an internal mixer, and melt-mixed at 200° C. and 70 rpm for 10 minutes to obtain a polypropylene compound.

[0020] The above sample was made into a test piece with a size of 100mm×100mm×6mm by molding method, and the flame retardancy of the polymer was determined according to the cone calorimeter method specified in ASTM E 1354. The radiation intensity of the heater is 35 kW / m2. The peak heat release rate of the sample during combustion was 490 kW / m2, and the combustion duration was 850 seconds.

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PUM

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Abstract

The invention discloses a method of improving the fire-retardant property of polyolefin nano composite material by catalytic carbonization method. The method comprises employing the nickel supported catalyst as the carbonization catalyst, fusing and mixing the catalyst, polyolefin, compatibilizer, and modified montmorillonite to prepare the halogen-free fire-retardant polyolefin nano composite material. By the correspondence of the catalyst and montmorillonite, the conversion of polyolefin to graphite-structural carbon during the combustion process can be promoted, and the combustible gas content released by the polymer cracking during the combustion process can be reduced, the combustion speed of the material can be reduced, so that the material has self-protection function. The process of mixing polyolefin and fire-retardant components is simple, the fire-retardant is high.

Description

technical field [0001] The invention relates to a method for catalyzing carbon formation to improve the flame-retardant performance of polyolefin nanocomposite materials. Background technique [0002] Polyolefin materials are widely used in the fields of automobiles, wires and cables, building materials, interior products and furniture because of their low price, good comprehensive performance and easy processing and molding. The quality of fire and flame retardancy is a key technical indicator to determine whether new products composed of polyolefin materials can be used by users. In the past, flame retardant methods applied to polyolefin materials include adding halogen-containing flame retardants, or adding intumescent flame retardants, or adding inorganic flame retardants, such as magnesium hydroxide and aluminum hydroxide. In the actual application process, the main problems of these three types of flame retardants are: 1. The halogen-containing flame retardant system ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/12C08K9/04C08J3/00B29C47/38B29C48/395
Inventor 唐涛陈学成孟晓宇姜治伟陈辉
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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