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Polypropylene composite material for automobile sprayed exterior trimming parts and preparation method thereof

A composite material and polypropylene technology, which is applied in the fields of materials, automotive exterior parts, and chemistry, can solve problems that affect the performance of polypropylene composite materials, difficulty in adapting to large-scale production, and interface compatibility issues, and achieve spraying effects and Improvement of paint adhesion, improvement of adhesion and aging resistance, and effect of enhancing surface polarity

Inactive Publication Date: 2018-01-30
中广核俊尔(上海)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, plastics such as polypropylene commonly used for spraying exterior parts, due to their own non-polar characteristics, the surface energy of the material is much lower than that of metal materials, and the adhesion between the paint and the paint is often low, which requires cumbersome post-processing. The treatment process is spraying primer, flame treatment, ethanol wiping, etc., to increase the surface tension of plastic parts and strengthen the degree of adhesion to painted parts
In addition to the optimization and upgrading of the spraying process, the modification of the plastics used in the sprayed parts is also a very important means; CN106084461 and CN104558426 respectively describe the preparation of high polarity plastics by cultivating polar chemicals and grafting in polymerization reactors. The method of the polypropylene material, but its mass production characteristics are too low, it is difficult to adapt to the needs of large-scale production of the modern automobile industry; the high polar polypropylene material described in CN101717548 realizes the surface characteristics by a high content of polar resin However, these polar resins such as polyurethane, epoxy resin, ethylene acrylate, etc. often have interfacial compatibility problems with non-polar polypropylene resins, which seriously affects the performance of polypropylene composites

Method used

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  • Polypropylene composite material for automobile sprayed exterior trimming parts and preparation method thereof
  • Polypropylene composite material for automobile sprayed exterior trimming parts and preparation method thereof
  • Polypropylene composite material for automobile sprayed exterior trimming parts and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] A method for preparing a polypropylene composite material, comprising the following steps.

[0029] Step S1) Obtain the raw materials according to Table 1. Wherein, in the highly polar graft, the polyethylene resin accounts for 94.5% of the highly polar graft; the glycidyl methacrylate accounts for 94.5% of the highly polar graft. 5% of the amount of the grafted substance; the quality of the peroxide initiator accounts for 0.5% of the amount of the highly polar grafted substance. The peroxide initiator is selected from ethyl 3,3-bis(tert-butylperoxy)butyrate.

[0030] Step S2) mixing the high-impact copolymerized polypropylene, high-melting high-rigidity homopolypropylene, metallocene polyolefin toughening agent, and talcum powder among the raw materials to obtain a first mixture.

[0031] Step S3) preparing a melt of the highly polar graft. The step S3) includes the following steps.

[0032] Step S31) Obtain the ingredients for preparing the high polarity graft: po...

Embodiment 2

[0040] A method for preparing a polypropylene composite material, comprising the following steps.

[0041] Step S1) Obtain the raw materials according to Table 1. Wherein, in the highly polar graft, the polyethylene resin accounts for 94.5% of the highly polar graft; the glycidyl methacrylate accounts for 94.5% of the highly polar graft. 5% of the amount of the grafted substance; the quality of the peroxide initiator accounts for 0.5% of the amount of the highly polar grafted substance. The peroxide initiator is selected from ethyl 3,3-bis(tert-butylperoxy)butyrate.

[0042] Step S2) mixing the high-impact copolymerized polypropylene, high-melting high-rigidity homopolypropylene, metallocene polyolefin toughening agent, and talcum powder among the raw materials to obtain a first mixture.

[0043] Step S3) preparing a melt of the highly polar graft. The step S3) includes the following steps.

[0044] Step S31) Obtain the ingredients for preparing the high polarity graft: po...

Embodiment 3

[0052] A method for preparing a polypropylene composite material, comprising the following steps.

[0053] Step S1) Obtain the raw materials according to Table 1. Wherein, in the highly polar graft, the polyethylene resin accounts for 94.5% of the highly polar graft; the glycidyl methacrylate accounts for 94.5% of the highly polar graft. 5% of the amount of the grafted substance; the quality of the peroxide initiator accounts for 0.5% of the amount of the highly polar grafted substance. The peroxide initiator is selected from ethyl 3,3-bis(tert-butylperoxy)butyrate.

[0054] Step S2) mixing the high-impact copolymerized polypropylene, high-melting high-rigidity homopolypropylene, metallocene polyolefin toughening agent, and talcum powder among the raw materials to obtain a first mixture.

[0055] Step S3) preparing a melt of the highly polar graft. The step S3) includes the following steps.

[0056] Step S31) Obtain the ingredients for preparing the high polarity graft: po...

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Abstract

The invention discloses a polypropylene composite material for automobile sprayed exterior trimming parts. The polypropylene composite material is prepared from the following raw materials in percentage by mass: 30 to 70 percent of high-impact-resistance co-polypropylene, 10 to 30 percent of high-melt-flow-index high-rigidity homo-polypropylene, 3 to 10 percent of metallocene polyolefin tougheningagent, 5 to 20 percent of talc powder and 2 to 10 percent of high-polarity graft. The invention further discloses a preparation method of the polypropylene composite material. According to the polypropylene composite material for automobile sprayed exterior trimming parts and the preparation method thereof disclosed by the invention, a high-polarity modified polymer is prepared through online melting chemical grafting; moreover, through a two-stage extruding granulator, secondary real-time melt blending of a high-activity and high-polarity modified polymer is realized, significant increase ofthe surface polarity of the obtained polypropylene composite material is ensured, and the adhesion and aging resistance of paint-coated parts are improved.

Description

technical field [0001] The invention relates to the fields of automobile exterior decorations, chemistry, materials and the like, in particular to a polypropylene composite material for automobile exterior decorations that can be sprayed and a preparation method thereof. Background technique [0002] Automobile lightweight, energy saving, and environmental protection are the future development trends of the current automobile industry. High-performance plastics instead of steel to make parts are one of the earliest and most mature aspects of automobile lightweight research. With the continuous development of the automobile industry, the requirements for vehicle shape, color and appearance are also constantly improving. The aging resistance is basically consistent with the requirements of metal parts coating. [0003] However, plastics such as polypropylene commonly used for spraying exterior parts, due to their own non-polar characteristics, the surface energy of the materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/06C08L23/20C08L51/06C08K3/34B29C47/92B29C48/92
Inventor 郑云龙黄志杰屈国梁王海华杨仓先
Owner 中广核俊尔(上海)新材料有限公司
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