A kind of polypropylene composition and preparation method thereof

Abstract

The invention discloses a polypropylene composition, which comprises the following components in parts by weight: 40-80 parts of polypropylene; 5-30 parts of low fluidity elastomer; 1-10 parts of high molecular weight ethylene-propylene multi-block copolymer share. The preparation method is to mix polypropylene, low-fluidity elastomer, and high-molecular-weight ethylene-propylene multi-block copolymer uniformly in a mixing device, then add them to an extruder, and perform melt mixing at a temperature of 170°C-240°C. Refining, pelletizing, cooling, and drying to obtain a polypropylene composition. The invention reduces the glossiness of the composition by adding low-fluidity elastomer and high-molecular-weight ethylene-propylene multi-block copolymer to the polypropylene, and meets the glossiness requirement of the automotive interior parts.

Description

technical field [0001] The invention belongs to the field of polypropylene polymer materials, and in particular relates to a low-gloss polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene composition has been widely used in the automotive industry due to its advantages of light weight, solvent resistance, easy processing and easy recycling. However, in the field of automotive interiors in recent years, the high-gloss The strong plastic feeling has gradually become one of the main complaints of consumers. Low-gloss automotive interior parts have a matte and elegant visual effect, and can reduce visual interference to drivers and passengers, which is conducive to driving safety and improving driving comfort. Therefore, in order to meet consumers' increasing demand for automotive interior materials It is of great significance to develop polypropylene composite materials for automotive low-gloss interior parts. [0003] In rec...

AI Technical Summary

Problems solved by technology

However, these methods have relatively limited effects on reducing the glossiness of automotive interior leather-grained parts, and cannot meet the ultra-low gloss performance requirements of some automotive OEMs' automotive leather-grained interior parts.

The surface of the mold for automotive interior parts will be corroded and textured, and the same polypropylene composite material will be used for injection molding into automotive interior parts. Automobile OEMs have adopted specific low-gloss texture molds, but the current polypropylene composite melt is not ideal for replicating the mold texture, so it is difficult for the glossiness of the texture-type interior parts to achieve low gloss Even if the material itself has low gloss, it is impossible to obtain low-gloss interior parts that meet the requirements

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