Polypropylene composite material with characteristics of low odor, scratch resistance and low gloss, and preparation method thereof

Abstract

The invention discloses a polypropylene composite material with characteristics of low odor, scratch resistance and low gloss, and a preparation method thereof, wherein the polypropylene composite material comprises 50-90 parts of a PP resin, 5-25 parts of a HDPE resin, 0.5-3 parts of a scratch-resistant agent, 0.2-5 parts of an adsorbent, and 2-40 parts of inorganic powder. According to the present invention, the blending compatibility is increased by adding the HDPE, the co-action is achieved with the scratch-resistant agent so as to improve the scratch resistance, the low odor of the composite material is further improved by adding the water injection / drying process and the adsorbent, and the gloss of the composite material is reduced by filling with the inorganic powder, such that thepolypropylene composite material having the balance among the low odor, the scratch resistance and the low gloss can be achieved under the premise of the substantially unchanged mechanical properties;the composite material has the excellent comprehensive performance, and can be suitable for the production of vehicle interior decoration parts; and the preparation method has characteristics of simple and easily-controlled preparation process, low production cost and stable product performance, and is suitable for industrial scale production.

Description

technical field [0001] The invention relates to the technical field of polymer material processing, in particular to a polypropylene composite material with low odor, scratch resistance and low gloss properties and a preparation method thereof. Background technique [0002] With the continuous improvement of automobile lightweight demand, polypropylene materials are widely used in automobile parts, including bumpers, instrument panels, door panels, pillars, etc., due to their low specific gravity, excellent mechanical properties, low cost, and easy processing. At present, people's awareness of environmental protection is increasing day by day, and the quality of life requirements are getting higher and higher, which puts forward higher requirements for the comfort of the car environment. The low-odor, scratch-resistant and low-gloss functions of polypropylene materials can respectively help to improve the healthy environment inside the car, maintain the interior beauty and i...

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Problems solved by technology

[0004] Chinese patent CN 106317743A discloses a high-flow, low-odor, scratch-resistant polypropylene material for automotive interiors and a preparation method thereof, which uses a side-feeding method to add basic magnesium sulfate whiskers to enhance scratch resistance, but This method is more complicated

[0005] Chinese patent CN 102040766A discloses a low-odor and scratch-resistant mineral-filled polypropylene compound and its preparation method. The added scratch-resistant agent and compatibilizer have a high proportion, which affects the mechanical properties of the material; mineral filling only specifies talcum powder, and specifies narrow range

[0006] Chinese patent CN 105754211A discloses a low-odor, low-VOC modified polypropylene and its preparation method, without adding HDPE to the formula, and without mentioning the improvement of scratch resistance and low gloss

In order to meet the above requirements, people often need to add mineral fillers, rubber or inorganic matting agents to the polypropylene composition, but the above methods usually reduce the mechanical properties or matting properties of the product

The current patent has not yet given a good solution

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