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Preparation method of flame retardant polypropylene material

A technology for flame-retardant polypropylene and polypropylene, applied in fibrous fillers, dyed low-molecular-weight organic compounds, etc., can solve the flame-retardant properties of unreported composite materials such as oxygen index, and the effect of oxygen index is not obvious, and can only reach 32.5 And other issues

Inactive Publication Date: 2010-05-05
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Chinese patent CN10045437C discloses that 0.5% to 5% organic montmorillonite and chemically degraded modified polypropylene resin are melt-blended to prepare polypropylene / montmorillonite nanocomposites for the production of flame-retardant polypropylene fibers, but it does not Reporting the flame retardant properties of composite materials such as oxygen index
Chinese patent CN101376727A discloses the method of using intumescent flame retardant, organically modified montmorillonite, and rare earth oxides to jointly flame-retardant PP. When the total flame retardant dosage is 28%, the organic montmorillonite content is 2%, and the rare earth When the oxide content is 1%, the oxygen index can only reach 32.5, and the introduction of organic montmorillonite and rare earth oxides has no obvious effect on improving the oxygen index of the system
The thermal expansion process of vermiculite and the expanded product and IFR synergistic flame retardant polypropylene have not yet been patented.

Method used

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  • Preparation method of flame retardant polypropylene material

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Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0019] (1) Dissolve 100 parts of titanate coupling agent in 100 parts of solvent oil to make a titanate coupling agent solution, add 3 parts of titanate coupling agent solution to 100 parts of vermiculite powder in a high-speed mixer Mix at a high speed for 15 minutes at 110° C. to obtain surface-coupling-treated vermiculite powder.

[0020] (2) According to the formula in Table 1, the components were uniformly mixed and then melt-blended in an internal mixer at 190° C. and 100 rpm for 6 minutes to obtain a flame-retardant polypropylene material. The obtained material performance test results are shown in Table 2.

Embodiment 5

[0022] The surface treatment process of vermiculite is with embodiment 1-4.

[0023] According to the formula in Table 1, after mixing the components evenly, the mixed material is added to a parallel co-rotating twin-screw extruder for blending and extruding to obtain a flame-retardant polypropylene material. The extrusion process is 180°C in the first zone and 190 in the second zone. ℃, the third zone is 200℃, the fourth zone is 195℃, the screw speed is 260r / min, and the feeding frequency is 20Hz. The performance test results of the obtained materials are shown in Table 2.

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Abstract

The invention discloses a preparation method of flame retardant polypropylene material. The flame retardant polypropylene material is characterized in that non-expanded vermiculite powder is subject to surface treatment by titanate coupling agent and is fused and mixed with expanded flame retardant, polypropylene and olypropylene grafted by maleic anhydride to obtain the flame retardant polypropylene material. The novel flame retardant polypropylene material has higher flame retardant performance than singled-used commensurate expanded flame retardant, oxygen index can reach 37% (v%), mechanical property has small variation, and cost is lower. Compared with PP substrate material, the tensile strength retention rate of the flame retardant material is more than 75%, impact strength is more than 67%, so that the flame retardant polypropylene material is suitable for means of transport, building materials and the like having flame retardant requirements.

Description

technical field [0001] The invention relates to a preparation method of a polymer material, in particular to a preparation method of a flame-retardant polypropylene material. Background technique [0002] Polypropylene (PP) has good mechanical properties, chemical corrosion resistance and heat resistance, and has become one of the most widely used general-purpose plastics with many brands. The chemical structure of PP determines that it is extremely flammable, and its oxygen index is only 18. It needs to be modified for flame retardancy when used in many occasions such as transportation tools and building materials. Due to the release of toxic gases during combustion, the amount of halogen-containing flame retardants is gradually decreasing. Clean, halogen-free, high-efficiency flame retardants are the development direction of flame retardants. Intumescent flame retardants (IFRs) have attracted extensive attention due to their advantages such as non-toxicity, low smoke, go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08L51/06C08K9/04C08K3/34C08K3/32C08K5/053C09C1/28C09C3/08
Inventor 任强万超瑛张勇
Owner SHANGHAI JIAO TONG UNIV
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