Low-gloss high-rigidity high-impact polypropylene composite material for automobile hard plastic instrument panels and preparation method of composite material

Abstract

The invention discloses a low-gloss high-rigidity high-impact polypropylene composite material for automobile hard plastic instrument panels and a preparation method of the composite material. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 33-90 parts of polypropylene, 0-25 parts of ultrafine inorganic filler, 5-20 parts of a flexibilizer, 1-15 parts of fully vulcanized powder rubber, 0.5-3 parts of a compatilizer, 0.1-1 part of an antioxidant, 0.1-1 part of a light stabilizer and 0-2 parts of other auxiliaries. According to the invention, the nano-scale fully vulcanized powder rubber is introduced into a polypropylene composite material system, and the reinforcing effect of the fully vulcanized powdery rubber to toughening agentelastomers is utilized, so that the toughened polypropylene composite material is synergistically reinforced; meanwhile, the nano-scale fully vulcanized powder rubber and the superfine inorganic filler can form a core-shell structure in a polypropylene matrix, so that the obtained composite material has relatively high toughness and also has relatively high strength and rigidity at the same time.Meanwhile, the fully vulcanized powder rubber can reduce gloss of the composite material system, so that a matt effect is achieved.

Description

technical field [0001] The invention relates to a polypropylene composite material, in particular to a low-gloss, high-rigidity, high-impact polypropylene composite material for automotive hard plastic instrument panels and a preparation method thereof. It is a polypropylene composite material with simple process and low cost. The material has high impact resistance while retaining high strength and rigidity. At the same time, the composite material has the advantages of low gloss, which can fully meet the performance requirements of the automotive interior dashboard. It belongs to polymer modification and processing technology field. Background technique [0002] With the rapid development of the automobile industry in recent years, the proportion of plastic parts in the interior and exterior of automobiles is increasing. As an automobile dashboard carrying the safety performance of the driving side, it integrates airbags, directional control systems, instruments, air-cond...

AI Technical Summary

Problems solved by technology

However, under low temperature conditions, especially under extreme conditions such as -30°C or even -40°C, the high glass transition temperature of polypropylene materials determines that its low-temperature impact resistance is poor, and it can only be toughened by adding a higher content of However, the strength and rigidity of the material will decrease at the same time, which cannot meet other test requirements, such as the stiffness test of assembly parts, etc.

In addition, the surface gloss of conventional hard plastic dashboards is high, affecting the driver's sight, which is often criticized by consumers

Relevant patents have studied this. For example, the publication number CN101173075 patent reduces the glossiness of the composite material by adding silicon dioxide to the polypropylene composite material, but the gloss reduction is limited and affects the mechanical properties of the composite material; the patent publication number CN102807703B passed Adding powdered nitrile rubber, grafted polypropylene and silica to the composite material improves the gloss of the material, but the toughness of the material is affected

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