Polypropylene composition and preparation method thereof

Abstract

The invention discloses a polypropylene composition which comprises, by weight parts, 100 parts of polypropylene, 10-30 parts of basic magnesium sulfate whisker, 0.1-1.0 part of foaming agent, 0.5-1.5 parts of smell adsorbent and 10-30 parts of flexibilizer. By simultaneously adding basic magnesium sulfate whisker and foaming agent of a specific content, compared with the situation that only basic magnesium sulfate whisker is added, the weight of a workpiece can be greatly reduced while the comprehensive mechanical property is not reduced, and thus the lightweight requirements of an automobile are met. By adding the smell adsorbent of a specific content and adopting single vacuum design of a twin-screw extruder, it is guaranteed that the vacuum degree requirements are not larger than -0.08 bar, micromolecular volatile matter can be pumped away, and the devolatilization effect is improved obviously. The prepared polypropylene composition is low in smell and emission characteristics, the lightweight requirements of the automobile and low-smell low-emission performances of automobile interior part materials can be met, and the application prospect is wide.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a polypropylene composition and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics and has been widely used in chemical, construction, light industry, automobile, home appliances, packaging and other industrial sectors. However, with the development of the industry, the requirements for material properties are getting higher and higher. Ordinary polypropylene must be modified to give it high performance in order to meet the needs. [0003] At present, in the modified polypropylene industry, the mainstream of reinforced polypropylene composite materials is to use talcum powder to fill polypropylene modified composite materials. This kind of talc powder filled modified polypropylene composite can be widely used in automotive interior and exterior trim parts, such as: instrument panel , center conso...

AI Technical Summary

Problems solved by technology

Chinese patent CN102952336A discloses a kind of active basic magnesium sulfate whisker modified polypropylene composite material and its preparation method, the composite material is composed of polypropylene, basic magnesium sulfate whisker, toughening agent, processing aid, coupling agent , acid diluent, and heat stabilizer, the engineering parts made of the composite material of the present invention are developed towards lightweight, and are conducive to reducing the amount of material used and the cost of material use, but the acid diluent added in the patent Compounds and coupling agents seriously affect the odor and VOC of composites

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