Modified polypropylene for automobile bumper and preparation method of modified polypropylene

Abstract

The invention discloses modified polypropylene for an automobile bumper and a preparation method of the modified polypropylene. The modified polypropylene for the automobile bumper is prepared from the following raw materials in parts by weight: 40 to 50 parts of polypropylene, 30 to 66.7 parts of ethylene propylene diene monomer rubber, 0.4 to 0.6 part of 2,8-di-tert-butyl-4-methylphenol, 0.4 to0.8 part of phosphite, 2 to 3 parts of zinc oxide, 2 to 4 parts of copper fibers, 1 to 2 parts of organic fibers, 22 to 29 parts of talcum powder, 1 to 2 parts of aluminum zinc oxide, 0.2 to 0.3 partof coupling agent, 0.5 to 1 part of coloring agent, 0.8 to 1.2 parts of SN, 0.5 to 0.8 part of vulcanizing agent and 0.4 to 0.6 part of accelerant. The modified polypropylene for the automobile bumper, disclosed by the invention, has the beneficial effects that materials can adapt to a wider temperature range and the toughness and balance of the materials are improved; in addition, other physicalproperties of the materials are also taken into account, and a wider application prospect is realized.

Description

technical field [0001] The invention relates to a plastic and a preparation method thereof, in particular to a modified polypropylene for automobile bumpers and a preparation method thereof. Background technique [0002] The car bumper is a safety device that absorbs and slows down external impact and protects the front and rear of the car body. The traditional automobile bumper is made of steel plate punched into channel steel, riveted or welded together with the frame longitudinal beam, and has a large gap with the body, which looks very unattractive, and the cost is high. [0003] With the development of the automobile industry and the extensive application of engineering plastics in the automobile industry, automobile bumpers, as an important safety device, are also on the road of innovation. In addition to maintaining the original protection function, the existing front and rear bumpers of cars also need to pursue harmony and unity with the shape of the car body, and p...

AI Technical Summary

Problems solved by technology

However, most of the existing compositions are heterogeneous structures. Although they have a good balance of rigidity and toughness, they are still significantly affected by temperature, especially in low temperature environments, and the strength of the material is not ideal.

In addition, other general physical properties such as aging resistance and corrosion resistance have declined, and it is difficult to take into account multiple properties, and the scratch resistance of the material needs to be improved to reduce the difficulty and cost of maintenance and repair.