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Synergetic intumescent flame-retardant polypropylene composite material and preparation method thereof

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

Inactive Publication Date: 2013-08-07
SHUNDE POLYTECHNIC
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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 above-mentioned shortcomings, provide a synergistically intumescent flame-retardant polypropylene composite material and its preparation method, and mainly solve the problems of low flame-retardant efficiency and high water solubility of intumescent flame retardants. The halogen-free flame retardant of the present invention The flame retardant has the advantages of being insoluble in water, small addition amount, high flame retardant efficiency, and has little influence on the mechanical properties of materials.

Method used

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  • Synergetic intumescent flame-retardant polypropylene composite material and preparation method thereof
  • Synergetic intumescent flame-retardant polypropylene composite material and preparation method thereof
  • Synergetic intumescent flame-retardant polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After weighing 3.97kg of polypropylene pellets and 0.015kg of zinc stearate, put them into a high-speed mixer for pre-mixing for 5 minutes, so that zinc stearate adheres to the surface of polypropylene pellets, and then add Ammonium polyphosphate (APP) 0.6kg, phosphorus-nitrogen type carbon forming agent (PPEPA) 0.4kg and 1010 antioxidant 0.015kg were mixed for 5 minutes and mixed evenly, then extruded in a twin-screw extruder, cooled, Pelletizing to obtain synergistic expansion flame-retardant polypropylene composite material. Among them, the temperature setting of each zone of the twin-screw extruder is as follows: 160°C, 170°C, 175°C, 185°C, 190°C, 200°C, 200°C, 190°C, 185°C, 180°C. The oxygen index of the polypropylene composite material is 28.0%, and the UL-94 test reaches the V-0 level.

[0026] In this example, the ammonium polyphosphate (APP) described above is crystalline type II ammonium polyphosphate with a high degree of polymerization, and the structural f...

Embodiment 2

[0031] After accurately weighing 3.93kg of polypropylene pellets and 0.010kg of calcium stearate, put them into a high-speed mixer for pre-mixing for 5 minutes, so that calcium stearate adheres to the surface of polypropylene pellets, and then mix them in a high-speed mixer Add 0.55kg of melamine polyphosphate (MPP), 0.45kg of phosphorus-nitrogen carbon forming agent (PPEPA) and 0.010kg of timely 68 antioxidant, and 0.05kg of 4A molecular sieve in the high-speed dispersant, and then in the twin-screw machine Extrude in an extruder, cool and granulate to obtain a synergistic expansion flame-retardant polypropylene composite material. Among them, the temperature setting of each zone of the twin-screw extruder is as follows: 165°C, 170°C, 175°C, 185°C, 190°C, 200°C, 200°C, 190°C, 185°C, 180°C. The oxygen index of the polypropylene composite material is 33.0%, and the UL-94 test reaches the V-0 level.

[0032] In this embodiment, the structural formula of melamine polyphosphate (...

Embodiment 3

[0037] Accurately weigh 3.85kg of polypropylene pellets and 0.11kg of N,N-ethylene bisstearic acid amide (EBS), place them in a high-speed disperser and stir for 9 minutes, then add 0.5kg of melamine polyphosphate (MPP), phosphorus - Nitrogen-type carbon forming agent (PPEPA) 0.5kg, 1010 antioxidant 0.010kg and cerium oxide 0.03kg are pre-mixed in a high-speed dispersant for 15 minutes, then extruded in a twin-screw extruder, cooled, and granulated. The halogen-free flame-retardant polypropylene composite material can be obtained. Among them, the temperature setting of each zone of the twin-screw extruder is as follows: 150°C, 170°C, 175°C, 185°C, 190°C, 200°C, 200°C, 190°C, 185°C, 180°C. The oxygen index of the polypropylene composite material is 34.5%, and the UL-94 test reaches the V-0 level.

[0038] In this embodiment, in this embodiment, the structural formula of melamine polyphosphate (MPP) is: , n≥1000, the content of ammonium polyphosphate (APP) or melamine polypho...

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Abstract

The invention relates to a synergetic intumescent flame-retardant polypropylene composite material and a preparation method thereof. The method is characterized in comprising, by weight, 70-82% of polypropylene, 17-30% of an intumescent flame retardant, 0-5% of a synergistic agent, 0.1-0.5% of an antioxidant, 0.1-0.5% of a lubricant, and 0-0.5% of an anti-dripping agent. The material has the advantages that: a flame retardant composition addition amount is 18-25%, and a flame retardant level reaches V-0 (3.2mm); compared with a halogen-containing flame retardant, the synergetic intumescent flame-retardant polypropylene composite material has the advantages of low smoke amount, low smoke density, low release of toxic and harmful gas, and high flame-retardant efficiency.

Description

technical field [0001] The invention relates to the technical field of flame-retardant polypropylene materials, in particular to a cooperative expansion flame-retardant polypropylene composite material. Background technique [0002] Polypropylene (PP) is a general-purpose plastic with good mechanical properties, processing properties, chemical corrosion resistance and electrical insulation, light weight and non-toxic, widely used in auto parts, construction materials, household appliances, electronics And packaging materials, etc., the use of rapid growth. However, polypropylene also has some defects. For example, polypropylene (PP) is a flammable material, its oxygen index is only 17-18%, and a large number of molten droplets are formed during combustion, which is very dangerous and limits the use of polypropylene (PP). It is used in occasions with high requirements for flame retardancy. Therefore, it is very necessary to modify the flame retardant of polypropylene (PP) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/02C08K3/32C08K5/527C08K5/3492
Inventor 冯才敏梁敏仪黄健光刘洪波
Owner SHUNDE POLYTECHNIC
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