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Polypropylene composition and preparation method thereof

A technology of polypropylene composition and polypropylene resin, which is applied in the field of polypropylene composition and its preparation, can solve the problems that cannot meet the requirements of the appearance of auto parts, etc., and achieve good appearance, suppress the formation of pitting, and simple operation steps Effect

Pending Publication Date: 2022-01-14
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, at present, there are few researches on the pitting improvement technology of polypropylene materials. Pitting is an appearance defect that is visible to the naked eye and cannot be covered by spray paint due to poor dispersion of rubber during the molding process of the material. If the pitting improvement plan is not considered, it is still unsatisfactory Appearance requirements for auto parts

Method used

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  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof
  • Polypropylene composition and preparation method thereof

Examples

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Embodiment 1

[0037] An embodiment of the polypropylene composition of the present invention and the preparation method thereof, as shown in Table 1.

[0038] The preparation method of the polypropylene composition includes the following steps:

[0039] The polypropylene resin, toughening, peroxide, and aid is mixed and uniformly added to the twin screw extruder, and the polypropylene composition is obtained by melt-kneading and extruding granulation; the melt mixing The temperature at the time of 170 ~ 220 ° C, the screw rotation speed in the twin screw extruder is 350 to 450 r / min.

[0040] The polypropylene resin is a copolymerized polypropylene resin, and the medium sea shell company produces PP EP648U products; the melt mass flow rate of the polypropylene resin is 60 g / 10 min;

[0041] The toughening agent is an ethylene-butene copolymer, Dow Chemical Company produces PoE ENGAGE 7447 products; the density of the tough agent is 0.865g / cm 3 The melt mass flow rate of the toughening age...

Embodiment 2～10、 Embodiment 13、 Embodiment 15

[0047] The polypropylene of the present invention and the preparation method thereof, the component component of the polypropylene composition is shown in Table 1. The preparation method of the product described in each of the examples is in the same embodiment.

[0048] Example 5 The polypropylene resin is a copolymerized polypropylene, a medium sea shell company produces a PP EP548R product; the melt mass flow rate of the polypropylene resin is 30 g / 10 min; the tough agent is an ethylene-butene copolymer. , Dow Chemical Company produces PoE Engage 7447 products; the toughening agent has a density of 0.865g / cm 3 The melt mass flow rate of the toughening agent is 5 g / 10 min;

[0049] Example 6 The polypropylene resin is a homogeneous polypropylene, Lanzhou Petrochemical production PP H9018 product; the melt mass flow rate of the polypropylene resin is 60 g / 10 min; the tough agent is an ethylene-octene copolymer. , Dow Chemical Company produces PoE ENGAGE 8842, the density ...

Embodiment 12

[0052] The difference from the present embodiment and the fourth embodiment is only: the tough agent of the present embodiment is a polypropylene elastomer, and Exxon Mobil produces VistaMAX 3000 products, the density of the toughness is 0.873 g / cm. 3 The melt mass flow rate of the toughening agent is 8.0 g / 10 min.

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Abstract

The invention discloses a polypropylene composition and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the polypropylene composition disclosed by the invention, by adding a specific content of organic peroxide into a polypropylene resin component, the molecular weight of rubber macromolecules can be effectively reduced, and the dispersity of the material is improved, so that the formation of hard spots is inhibited, and the polypropylene composition has a good appearance. Meanwhile, a specific flexibilizer is added into the polypropylene component, and the ratio of the flexibilizer to peroxide is optimized, so that the obtained product keeps good flexural modulus and is excellent in comprehensive performance. The invention also discloses a preparation method of the polypropylene composition. The preparation method has simple operation steps and can realize industrial large-scale production. The invention also discloses an application of the polypropylene composition in preparation of automobile interior and exterior parts.

Description

Technical field [0001] The present invention relates to the field of polymer materials, and more particularly to a polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene (PP) has the advantages of low density, easy processing, and excellent mechanical properties. It has been widely used in automotive industries, home appliances, and machinery, etc., which are most common in automotive areas. As people pay more attention to the appearance of automotive parts, automotive materials must not only have excellent mechanical properties, but also have excellent appearance, especially polymer material parts, and no sparrow, crystal dot, fisheye and Appearance defects such as scratches. [0003] In order to improve the appearance of polypropylene materials, people have conducted a lot of research. A polypropylene film for ultra-thin aluminum plastic film and a preparation method thereof, which filters the plasticized polypropylene melt, ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/08C08K5/14
CPCC08L23/12C08L23/14C08L23/0815C08K5/14
Inventor 雷亮陈平绪叶南飚俞飞陈嘉杰吴国峰陈延安杨波罗忠富
Owner KINGFA SCI & TECH CO LTD
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