Flame-retardant material, preparation method thereof, and automobile engine decorative cover

A technology for automobile engines and flame-retardant materials, applied in the field of flame-retardant materials, can solve problems such as poor mechanical properties of composite materials, aging and brittleness of polypropylene materials, fusion of montmorillonite and polypropylene, etc., to increase anti-aging performance , Increase rigidity and anti-aging performance, reduce the effect of burning rate

Active Publication Date: 2014-10-15
HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional engine trim cover is made of mineral-filled polypropylene material, but in the high-temperature working environment of the engine compartment, affected by high-temperature heat radiation, the ordinary polypropylene material is easy to age and become brittle, and because the engine trim cover and The engine is relatively close, requiring it to be able to withstand high temperatures and have certain flame retardant properties
By adding traditional flame retardants, polypropylene materials can be made to have certain flame retardancy, but traditional flame retardants contain bromine, are not environmentally friendly, and have been restricted in use
At present, there are already records about halogen-free flame-retardant polypropylene and its preparation method. For example, the Chinese invention patent (application number: 200510040986.6) discloses a "halogen-free flame-retardant polypropylene and its preparation method", and the Chinese patent application (application number : 201110263574.4) discloses a "high-melting index halogen-free flame-retardant polypropylene and its preparation method", but the method of compounding montmorillonite and polypropylene in the above-mentioned prior art does not make the montmorillonite and polypropylene blend well , resulting in poor mechanical properties of the composite

Method used

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  • Flame-retardant material, preparation method thereof, and automobile engine decorative cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The high-purity montmorillonite whose particle size is 3000 mesh and whiteness is 98% is stirred at a high speed in a high-speed mixer, and when the temperature of the high-purity montmorillonite reaches 85° C., add 2% wt of maleic anhydride graft compatibilizer, 3 %wt titanate coupling agent, 3%wt hindered phenolic antioxidant and 2%wt cetyltrimethylammonium bromide intercalation agent continue to stir to obtain organic montmorillonite;

[0019] Add 20%wt polypropylene to the above-mentioned organic montmorillonite, after stirring at a low speed in a low-speed mixer for 5min, extrude and granulate in a high-shear twin-screw extruder, the rotating speed of the high-shear twin-screw extruder is 300 rpm, the temperature is 180°C, to obtain nano-organic masterbatch with high content of montmorillonite;

[0020] After mixing the above-mentioned nano-organic masterbatch and polypropylene in a ratio of 5% wt, extrude and granulate in a low-shear twin-screw extruder, the speed...

Embodiment 2

[0022] The high-purity montmorillonite with a particle size of 2500 meshes was stirred at high speed in a high-speed mixer, and when the temperature of the high-purity montmorillonite reached 95°C, 10%wt of maleic anhydride grafted compatibilizer, 5%wt of titanate couple were added. Joint agent, the hindered phenolic antioxidant of 5%wt and the cetyltrimethylammonium bromide intercalation agent of 10%wt, continue stirring to obtain organic montmorillonite;

[0023] Add the polypropylene of 25%wt in above-mentioned organic montmorillonite, after low-speed stirring 10min in low-speed mixer, extrude granulation in high-shear twin-screw extruder, the rotating speed of high-shear twin-screw extruder is 350 rev / min, the temperature is 200°C, to obtain nano-organic masterbatch with high content of montmorillonite;

[0024] After mixing the above-mentioned nano-organic masterbatch and polypropylene in a ratio of 8% wt, extrude and granulate in a low-shear twin-screw extruder, the spee...

Embodiment 3

[0026] The high-purity montmorillonite whose particle size is 3000 mesh and whiteness is 98.5% is stirred at a high speed in a high-speed mixer, and when the temperature of the high-purity montmorillonite reaches 90° C., add 3% wt of maleic anhydride graft compatibilizer, 9 %wt titanate coupling agent, 6%wt hindered phenolic antioxidant and 5%wt cetyltrimethylammonium bromide intercalation agent, continue stirring to obtain organic montmorillonite;

[0027] Add the polypropylene of 30%wt in above-mentioned organic montmorillonite, after stirring at low speed 5min in low-speed mixer, extrude granulation in high-shear twin-screw extruder, the rotating speed of high-shear twin-screw extruder is 400 rpm, the temperature is 230 ° C, to obtain nano-organic masterbatch with high content of montmorillonite;

[0028] After mixing the above-mentioned nano-organic masterbatch and polypropylene in a ratio of 6% wt, extrude and granulate in a low-shear twin-screw extruder, the speed of the...

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Abstract

The invention discloses a flame retardant material and a preparation method thereof and an automobile engine trim cover. The preparation method of the flame retardant material comprises the following steps of: stirring high-purity montmorillonoid in a high-speed stirrer at a high speed, adding 10-30 percent by weight of adjuvant when the temperature of the high-purity montmorillonoid reaches 85-95 DEG C, and continuously stirring to obtain organic montmorillonoid; adding 20-30 percent by weight of polypropylene to the organic montmorillonoid, stirring for 5-10min in a low-speed stirrer at a low speed, and carrying out extrusion and granulation in a high-shear double-screw extruder to obtain nanometer organic master batch of the high-content montmorillonoid; and mixing the nanometer organic master batch and the polypropylene according to a proportion of 5-8 percent by weight, and carrying out extrusion and granulation in a low shear double-screw extruder to obtain the flame retardant material. Tests show that the flame retardant material has improved mechanical property which is 50 percent higher than that of the traditional polypropylene composite material. The flame retardant material disclosed by the invention has the advantages of improving the flame retardant performance and increasing the anti-aging performance and is particularly suitable for production of the automobile engine trim cover.

Description

technical field [0001] The invention relates to a flame-retardant material, in particular to a flame-retardant material, a preparation method thereof and an automobile engine decorative cover. Background technique [0002] The engine is the heart of the car. Generally, the engine placed in the cabin is equipped with an engine decoration cover, which can not only block dust and protect the engine, but also make the layout of the cabin look compact and beautiful. The traditional engine trim cover is made of mineral-filled polypropylene material, but in the high-temperature working environment of the engine compartment, affected by high-temperature heat radiation, the ordinary polypropylene material is easy to age and become brittle, and because the engine trim cover and The distance of the engine is relatively short, which requires it to be able to withstand high temperature and have a certain flame retardancy. By adding traditional flame retardants, polypropylene materials c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K9/04C08K3/34C08J3/22
Inventor 杨兴炎马芳武汤小生赵福全
Owner HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST
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