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High efficiency halogen-free flame retardant polypropylene composite material and its preparation method

A technology of flame-retardant polypropylene and composite materials, which is applied in the field of flame-retardant polypropylene materials, can solve the problems of low flame-retardant efficiency and high water solubility, and achieve the effects of high flame-retardant efficiency, low smoke density, and small smoke emission

Inactive Publication Date: 2012-03-07
SHUNDE POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above disadvantages, provide a high-efficiency halogen-free flame-retardant polypropylene composite material and its preparation method, which mainly solves the problems of low flame-retardant efficiency and high water-solubility

Method used

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  • High efficiency halogen-free flame retardant polypropylene composite material and its preparation method
  • High efficiency halogen-free flame retardant polypropylene composite material and its preparation method
  • High efficiency halogen-free flame retardant polypropylene composite material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Accurately weigh 0.67kg of ammonium polyphosphate (APP), 0.33kg of pentaerythritol phosphate (PEPA), 0.015kg of antioxidant, and 0.005kg of zinc stearate, and pre-mix them in a high-speed dispersant for 5 minutes to obtain a halogen-free flame retardant compound; then add 3.98 kg of polypropylene pellets into the above-mentioned high-speed disperser, stir for 8 minutes, and then put the above-mentioned mixture into a twin-screw extruder for extrusion, cooling, and granulation to obtain halogen-free resistors. Combustible polypropylene composite. Wherein, the temperature of each zone of the twin-screw extruder is 150-200°C. The oxygen index of the polypropylene composite material is 27.0%, and the UL-94 test reaches the V-0 level. In this embodiment, the antioxidant is 1010 or 168, and one or more mixtures of stearic acid, calcium stearate, and polypropylene wax can also be used instead of zinc stearate. Ammonium polyphosphate (APP) is high degree of polymerization cry...

Embodiment 2

[0032] Accurately weigh 0.67kg of ammonium polyphosphate (APP), 0.33kg of pentaerythritol phosphate (PEPA), 0.015kg of antioxidant, 0.005kg of calcium stearate, and 0.10kg of manganese dioxide, and pre-mix them in a high-speed dispersant for 10 minutes to obtain Halogen-free flame retardant compound; then add 3.88 kg of polypropylene pellets into the above-mentioned high-speed disperser, and stir for 10 minutes; then put the above-mentioned mixture into a twin-screw extruder for extrusion, cooling, and granulation, that is Halogen-free flame-retardant polypropylene composites are available. Wherein, the temperature of each zone of the twin-screw extruder is set at 150-200°C. The oxygen index of the polypropylene composite material is 31.0%, and the UL-94 test reaches the V-0 level. In this embodiment, one or more mixtures of zinc oxide and nano silicon dioxide can also be used instead of manganese dioxide, the antioxidant is 1010 or 168, and stearic acid, zinc stearate, polyp...

Embodiment 3

[0038]Accurately weigh 0.67kg of ammonium polyphosphate (APP), 0.33kg of pentaerythritol phosphate (PEPA), 0.015kg of antioxidant, 0.005kg of stearic acid, and 0.05kg of zinc oxide, and pre-mix them in a high-speed dispersant for 20 minutes to obtain Halogen flame retardant; then 3.93kg of polypropylene pellets are added to the above-mentioned high-speed disperser, and stirred for 20 minutes; then the above-mentioned mixture is put into a twin-screw extruder for extrusion, cooling, and granulation to obtain Halogen-free flame retardant polypropylene compound. Wherein, the temperature of each zone of the twin-screw extruder is set at 150-200°C. The oxygen index of the polypropylene composite material is 29.0%, and the UL-94 test reaches the V-0 level. In this embodiment, one or more mixtures of manganese dioxide and nano silicon dioxide can also be used instead of zinc oxide, the antioxidant is 1010 or 168, calcium stearate, zinc stearate, polypropylene wax can also be used O...

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Abstract

The invention relates to a high efficiency halogen-free flame retardant polypropylene composite material and its preparation method, which is characterized by comprising the following steps: placing 25-50% of pentaerythrityl phosphate (PEPA), 25-75% of ammonium polyphosphate (APP) and 0-25% of flame retardant synergistic agent in a high speed mixer for mixing for 5-20 minutes to prepare an intumescent flame retardant; then placing 68-82% of polypropylene, 17.5-30% of intumescent flame retardant, 0-5% of flame retardant synergistic agent, 0.1-0.5% of anti-oxidant, 0-0.5% of lubricant and 0-0.5% of anti-dripping agent in the high speed mixer for mixing for 5-20 minutes, extruding by a double-screw extruder, cooling, granulating or uniformly mixing by a double-roll mixer to obtain the high efficiency halogen-free flame retardant polypropylene composite material. The flame retardation grade of the polypropylene composite material can reach V-0 grade (3.2mm), compared with a halogen-containing fire retardant, the halogen-free flame retardant polypropylene has the advantages of small smoke generating quantity, low smoke density, small discharge amount of toxic and harmful gas, high flame retardation efficiency and the like when the halogen-free flame retardant polypropylene is combusted.

Description

technical field [0001] The invention relates to the technical field of flame-retardant polypropylene materials, in particular to a high-efficiency halogen-free flame-retardant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a general-purpose plastic with excellent comprehensive properties. It has good processing properties, mechanical properties, chemical corrosion resistance and electrical insulation, and has the advantages of non-toxicity and light weight. It is more and more widely used in construction Materials, automobile industry, household appliances, electronics, packaging materials, etc., and the growth rate is very fast. However, polypropylene also has its inherent flammability, the oxygen index is 17-18%, and a large number of molten droplets are produced during combustion, which has a high fire risk and is a flammable material, which limits the use of polypropylene in occasions with high flame...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08K13/04C08K7/22C08K7/24C08K3/32C08K5/527
Inventor 刘洪波冯才敏黄健光梁敏仪
Owner SHUNDE POLYTECHNIC
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