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Sprayable polypropylene composite material free of flame treatment and preparation method thereof

A technology of flame treatment and composite materials, which is applied in the field of sprayable polypropylene composite materials and polypropylene composite materials, which can solve the problems of large equipment investment, long flame baking process, and poor painting effect of parts, so as to reduce manufacturing costs , good effect of paint adhesion

Inactive Publication Date: 2017-05-31
CHONGQNG PRET NEW MATERIAL +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flame baking process takes a long time, requires a lot of equipment investment, and improper process control can easily lead to poor painting effects of parts. If we can try to improve the polarity of the polypropylene material itself, it is possible to eliminate the flame treatment process and greatly reduce production. manufacturing cost

Method used

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  • Sprayable polypropylene composite material free of flame treatment and preparation method thereof
  • Sprayable polypropylene composite material free of flame treatment and preparation method thereof
  • Sprayable polypropylene composite material free of flame treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 74.5% of polypropylene, 15% of talc, 10% of elastomer toughening agent, 0.1% of Irganox 1010, 0.1% of Igrafos 168, 0.3% of Negonox DSTP, and dry mix in a high-speed mixer for 5 minutes , and then added to the twin-screw extruder for melt extrusion and granulation, wherein the temperature inside the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, twin-screw extrusion The output speed is 400 rpm. After the particles are dried, they are injection molded on an injection molding machine to prepare samples. The panels were painted without flame treatment and tested for paint peeling.

Embodiment 2

[0033] Weigh 74.5% of polypropylene, 20% of talcum powder, 5% of elastomer, 0.1% of Irganox 1010, 0.1% of Igrafos 168, and 0.3% of Negonox DSTP in a high-speed mixer for 5 minutes, then add Melting extrusion granulation in a twin-screw extruder, where the temperature inside the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C at the head, and the speed of the twin-screw extruder 400 rpm. After the particles are dried, they are injection molded on an injection molding machine to prepare samples. The panels were painted without flame treatment and tested for paint peeling.

Embodiment 3

[0035] Weigh 64.5% of polypropylene, 20% of talc, 15% of elastomer toughening agent, 0.1% of Irganox 1010, 0.1% of Igrafos 168, 0.3% of Negonox DSTP, and dry mix in a high-speed mixer for 5 minutes , and then added to the twin-screw extruder for melt extrusion and granulation, wherein the temperature inside the screw barrel is: 200°C in the first zone, 210°C in the second zone, 210°C in the third zone, 210°C in the fourth zone, 220°C in the head, twin-screw extrusion The output speed is 400 rpm. After the particles are dried, they are injection molded on an injection molding machine to prepare samples. The panels were painted without flame treatment and tested for paint peeling.

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Abstract

The invention discloses a sprayable polypropylene composite material free of flame treatment and a preparation method thereof. The polypropylene composite material is composed of the following raw materials in percentage by weight: 48-79% of polypropylene, 15-25% of inorganic filler, 5-15% of elastomer toughening agent, 0-3% of compatilizer, 0-1% of surface lubricant, 0.1-2% of stabilizer and 0-5% of other additives. The sprayable polypropylene composite material disclosed by the invention has the following beneficial effects: 1, by means of the synergistic effect of the polypropylene, the inorganic filler, the elastomer toughening agent, the compatilizer and the surface lubricant, the obtained product can be sprayed without the flame treatment, and the paint adhesion is good; and 2, the mechanical performance of the material disclosed by the invention is equivalent to that of the traditional material, the necessary flame treatment process of the paint spraying process can be omitted, and thus the manufacturing costs of paint spraying parts are greatly reduced.

Description

technical field [0001] The invention relates to a polypropylene composite material, in particular to a flame-free sprayable polypropylene composite material and a preparation method thereof; belonging to the field of polymer modification and processing. Background technique [0002] With the rapid development of the automobile industry and people's increasing requirements for the appearance of the body, most of the plastic exterior parts of the body represented by bumpers need to be painted to maintain the same appearance as the metal paint of the body. At present, most of the exterior parts such as bumpers are produced with polypropylene composite materials. In consideration of environmental protection requirements, most of the paints used are water-based paints. Since polypropylene itself is a non-polar material, it is less compatible with polar water-based paints. Poor, if it is sprayed directly, the bonding force between the two is very poor, and it is easy to cause the ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L51/06C08L23/08C08K13/02C08K3/34C08K5/20B29C47/92B29C48/92
CPCC08L23/12B29C48/92B29C2948/9258B29C2948/92704C08K2201/003C08L2205/03C08L2205/06C08L2205/08C08L23/0815C08K13/02C08K3/34C08L51/06C08K5/20
Inventor 张锴张鹰张祥福周文
Owner CHONGQNG PRET NEW MATERIAL
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