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Expansion flame-retardant polypropylene / organic clay nano composite material and preparation

A technology of nano-composite material and organoclay, which is applied in the field of flame retardant materials to achieve the effects of low production cost, excellent flame retardant performance and thermal stability, and simple process

Inactive Publication Date: 2009-03-04
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far there are few related patents and literature reports on how to introduce rare earth metal oxides into the expanded flame-retardant polypropylene / clay nanocomposite system.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, the polypropylene and maleic anhydride grafted polypropylene were dried at 80°C for 24 hours, the intumescent flame retardant and the rare earth metal oxide were dried at 80°C for 18 hours, and the organically modified montmorillonite was dried at 80°C for 6 hours.

[0025] The polypropylene of 670 grams is mixed with the maleic anhydride grafted polypropylene of 50 grams, the organomodified montmorillonite of 15 grams, the melamine phosphate of 160 grams, the pentaerythritol of 90 grams and the dilanthanum trioxide of 15 grams; Then put it into a twin-screw extruder, extrude and granulate at a unit temperature of 170-190°C, a die head temperature of 170°C, and a screw speed of 300rpm, dry, and cool to obtain expanded flame-retardant polypropylene / organoclay nano composite material.

[0026] The expanded flame-retardant polypropylene / organoclay nanocomposite material sample prepared in this example is tested by a limiting oxygen index tester and a vertical combus...

Embodiment 2

[0028] First, the polypropylene and maleic anhydride grafted polypropylene were dried at 90°C for 12 hours, the intumescent flame retardant and the rare earth metal oxide were dried at 90°C for 12 hours, and the organically modified montmorillonite was dried at 90°C for 4 hours.

[0029] The polypropylene of 670 grams is mixed with the maleic anhydride grafted polypropylene of 50 grams, the organomodified montmorillonite of 20 grams, the melamine phosphate of 160 grams, the pentaerythritol of 90 grams and the dilanthanum trioxide of 10 grams; Then put it into a twin-screw extruder, extrude and granulate at a unit temperature of 170-190°C, a die head temperature of 170°C, and a screw speed of 300rpm, dry, and cool to obtain expanded flame-retardant polypropylene / organoclay nano composite material.

[0030] The expanded flame-retardant polypropylene / organoclay nanocomposite material sample prepared in this example is tested by a limiting oxygen index tester and a vertical combus...

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Abstract

The invention discloses a nanometer compound material of expansion retardant polypropylene / organic clay as well as a preparation method thereof; the invention is characterized in that 65.0 to 70.0 percent of polypropylene, 3.0 to 8.0 percent of macromolecular compatilizer, 0.5 to 2.5 percent of organic clay, 24.0 percent of expansion retardant and 0.5 to 2.5 percent of rare earth metal oxide are uniformly mixed according to the weight percentage; then the mixture is extruded and granulated, thus obtaining the product; the oxygen index thereof can be as high as 33 percent; according to the vertical consumption testing standard UL-94V0grade and tested by a cone type calorimeter, the peak value of the heat release speed is 250kW.m<-2>; the total heat release amount is 85MJ .m<-2>; the initial heat decomposing temperature is 273 DEG C; the largest heat decomposing temperature is 388 DEG C; the left mass fraction at the temperature of 600 DEG C is 12.0 percent; the nanometer compound material can be used as the special material used for electric apparatuses.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant materials, and in particular relates to an expanded flame-retardant polypropylene / organic clay nanocomposite material and a preparation method thereof. Background technique [0002] Polypropylene is a thermoplastic with a wide range of uses and rapid development, but its application in many fields is limited due to its flammability, so it is required to be flame-retardant modified in many applications. [0003] "Progress in Research on Flame Retardants for Polypropylene" in "Application of Engineering Plastics" (2005, 12:55-57) mentioned that currently intumescent flame retardant systems have been widely used in flame retardant polypropylene. However, due to the poor compatibility between most expansion systems and the polypropylene matrix, and insufficient matching of the thermal decomposition temperature range, the expansion system is used in a large amount in flame-retardant polypropyle...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K13/06C08K9/04C08K5/52C08K5/053C08K3/22
Inventor 胡源宋磊周顺吴靖
Owner UNIV OF SCI & TECH OF CHINA
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