Halogen-free flame-retardant polypropylene material for vehicles, and preparation method thereof

Abstract

The invention relates to a halogen-free flame-retardant polypropylene material for vehicles, and a preparation method thereof. The preparation method comprises the following steps: 1, accurately weighing and burdening polypropylene particles, a flexibilizer, a filler, a photo-thermal stabilizer, a compatilizer, a flame retardant and a processing assistant according to a specific formula; 2, placing the burdened materials in a high mixing machine, mixing under a rotating speed of 800-1000rpm for 5-20min, and heating to 60-100DEG C to obtain a uniformly-mixed dry material; and 3, adding a mixture obtained in step 2 to the feeding hopper of a double screw extruder, wherein the temperatures of the first zone, the second zone, the third zone, the fourth zone, the fifth zone, the sixth zone, the seventh zone, the eighth zone and the ninth zone of the double screw extruder are 170DEG C, 180DEG C, 185DEG C, 190DEG C, 195DEG C, 200DEG C, 200DEG C, 190DEG C and 185DEG C respectively, and the rotating speed of the main machine of the double screw extruder is 100-200rpm. The halogen-free flame-retardant polypropylene material has the characteristics of reduced density of the polypropylene filling modification material, high strength and improved dimensional stability.

Description

technical field [0001] The invention relates to the field of polymer material modification and processing, in particular to a halogen-free flame-retardant polypropylene material for vehicles and a preparation method thereof. Background technique [0002] At present, an ordinary car consumes about 40KG of plastic materials. With the further development of automobile lightweight, more and more parts will be replaced by plastics. During the driving process, due to electrical short circuit, engine failure, Traffic accidents and other reasons can easily cause fires, resulting in property damage and casualties. Most of the flammable auto parts are thermoplastic polymer materials. [0003] In automotive thermoplastic polymer materials, polypropylene materials account for about 40-50%, so it is particularly important to develop flame-retardant polypropylene materials. At present, there are few flame-retardant polypropylene materials developed for automotive materials. The current ...

AI Technical Summary

Problems solved by technology

At present, there are few flame-retardant polypropylene materials developed for automotive materials. The current polypropylene flame-retardant materials mostly contain halogens (such as decabromodiphenylethane) and heavy metal compounds (such as antimony trioxide), which are less harmful to the environment. Large, due to the strict control of automotive materials, it is imperative to develop halogen-free flame-retardant materials for vehicles

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