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Nano barium tungstate synergism expansibility flame-proof polypropylene and preparation method thereof

A technology of flame-retardant polypropylene and nano-barium tungstate, which is applied in the flame-retardant field of polypropylene materials, and achieves the effects of good thermal stability, improved flame-retardant performance, and reduced dosage

Inactive Publication Date: 2008-09-17
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a more consistent view on common synergists such as antimony oxide, zinc oxide, and zinc borate

Method used

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  • Nano barium tungstate synergism expansibility flame-proof polypropylene and preparation method thereof
  • Nano barium tungstate synergism expansibility flame-proof polypropylene and preparation method thereof
  • Nano barium tungstate synergism expansibility flame-proof polypropylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: take by weighing 650 grams of polypropylene powder pellets, 340 grams of single-component intumescent flame retardant neopentyl glycol phosphate ester melamine salt, 10 grams of flame retardant synergist nano-barium tungstate, and put the above pellets in The mixing process in the high-speed mixer is good. Under the conditions of conventional feeding speed, temperature and screw speed, add the twin-screw extruder, extrude, cool, and pelletize to obtain the synergistic expansion of nano-barium tungstate of the present invention. flame retardant polypropylene. The limiting oxygen index is 29.8%, and the char formation rate at 600°C is 10.5%.

Embodiment 2

[0021] Embodiment 2: take by weighing 700 grams of polypropylene powder pellets, 290 grams of single-component intumescent flame retardant neopentyl glycol phosphate ester melamine salt, and 10 grams of flame retardant synergist nano barium tungstate. The mixing process in the high-speed mixer is good. Under the conditions of conventional feeding speed, temperature and screw speed, add the twin-screw extruder, extrude, cool, and pelletize to obtain the synergistic expansion of nano-barium tungstate of the present invention. flame retardant polypropylene. The limiting oxygen index is 31.2%, and the char formation rate at 600°C is 13.5%.

Embodiment 3

[0022] Embodiment 3: take by weighing 750 grams of polypropylene powder pellets, 245 grams of single-component intumescent flame retardant neopentyl glycol phosphate ester melamine salt, 5 grams of flame retardant synergist nano barium tungstate, the above pellets in The mixing process in the high-speed mixer is good. Under the conditions of conventional feeding speed, temperature and screw speed, add the twin-screw extruder, extrude, cool, and pelletize to obtain the synergistic expansion of nano-barium tungstate of the present invention. flame retardant polypropylene. The limiting oxygen index is 28.3%, and the char formation rate at 600°C is 9.7%.

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Abstract

The invention discloses a nanometer barium tungstate synergistic intumescent flame-retardant polypropylene and a preparation method thereof. The nanometer barium tungstate synergistic expandable flame-retardant polypropylene is prepared by polypropylene granules accounting for 60 to 80 percent by mass, neopentyl glycol phosphate melamine salt as a mono-component intumescent flame retardant accounting for 19.5 to 35 percent by mass, and a nanometer flame retardant synergistic agent accounting for 0.5 to 5 by mass through the steps of mixing at high speed, extrusion and granulation. The method for preparing the flame-retardant polypropylene is simple with high flame retardant efficiency. A compact coal layer is formed on the surface of the material during combustion, which insulates heat, oxygen, and prevents flame from spreading. Little fume and much coal are produced. The flame-retardant polypropylene and the preparation procedure are innoxious, and do little harm to human bodies and the environment with low pollution level.

Description

technical field [0001] The invention belongs to the flame-retardant technology of polypropylene materials, in particular to a nano-barium tungstate synergistically expandable flame-retardant polypropylene and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a thermoplastic with excellent performance. It is widely used in the automotive industry, household appliances, electronics, packaging and building materials and furniture. Its development speed has always been the first among all kinds of general-purpose plastics. In 2004, the total production capacity of polypropylene in the world was about 42.08 million t / a, with an annual increase of about 6.0%, and the total consumption reached 39.259 million t / a. It is predicted that the total global production capacity in 2010 will reach 61 million t / a. The output of polypropylene in my country is about 4.749 million t / a, and the apparent consumption is about 7.647 million t / a. It is predicted that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K5/521C08K3/24C08K7/08
Inventor 王新龙
Owner NANJING UNIV OF SCI & TECH