A kind of polypropylene composition for efficiently improving flow marks and its preparation method and application

A polypropylene composition and polypropylene technology, applied in the field of polymer materials, can solve the problems of inability to efficiently improve flow marks, high overall dosage, and high polypropylene content, achieve high-efficiency material surface flow marks, improve mechanical properties, improve The effect of melt elasticity

Active Publication Date: 2022-05-10
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, flow marks are generally improved by compounding two or more polypropylenes with different melt indices, and the content of polypropylene with a low melt index needs to be higher, and the overall dosage also needs to be higher, which cannot achieve efficient improvement. Flow marks

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  • A kind of polypropylene composition for efficiently improving flow marks and its preparation method and application
  • A kind of polypropylene composition for efficiently improving flow marks and its preparation method and application
  • A kind of polypropylene composition for efficiently improving flow marks and its preparation method and application

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention. In the examples, the percentages are weight percentages unless otherwise specified. The methods in the examples are conventional methods in the art unless otherwise specified.

[0024] The source of raw material used in embodiment and comparative example is as follows:

[0025] (1) Flow Mark Improving Agent-1 is homopolypropylene, purchased from: ExxonMobil, its melt flow rate is 0.2g / 10min under the test conditions of 230°C and 2.16kg, and its weight average molecular weight Mw is 1.62× 10 6 g / mol;

[0026] (2) Flow mark improving agent-2 is h...

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Abstract

The invention discloses a polypropylene composition for efficiently improving flow marks, which includes a flow mark improving agent, the flow mark improving agent is high molecular weight homopolypropylene, and its melting temperature under the test conditions of 230°C and 2.16kg is Volume flow rate<0.5g / 10min, weight average molecular weight Mw>1.5×10 6 g / mol. When the weight percentage of the flow mark improving agent in the polypropylene composition is 0.2% to 4%, the flow mark of the polypropylene composition can be effectively improved. The invention provides a new method for improving the flow marks on the surface of the polypropylene material, fundamentally solves the problem of the flow marks on the surface of the polypropylene material, and further improves the mechanical properties of the material without significantly reducing the melt flow rate of the material system , to avoid the occurrence of other injection molding defects.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a polypropylene composition for efficiently improving flow marks, a preparation method and application thereof. Background technique [0002] In the injection molding process of modified polypropylene, especially when preparing large-scale plastic parts such as automobile dashboards, bumpers, door panels, or other plastic parts with a long process and a large area, the surface of the product is prone to tiger skin patterns. Defects, also known as flow marks, and such defects will seriously affect the appearance quality of the product. [0003] In the prior art, flow marks are generally improved by compounding two or more polypropylenes with different melt indices, and the content of polypropylene with a low melt index needs to be higher, and the overall dosage also needs to be higher, which cannot achieve efficient improvement. Flow marks. For example, CN1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/06C08L23/08C08K13/02C08K3/34C08K5/134C08K5/526
Inventor 苏娟霞黄险波叶南飚杨波罗忠富卢朝亮吴亦建雷亮
Owner KINGFA SCI & TECH CO LTD
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