Uniform light-transmitting polypropylene composition as well as preparation method and application thereof

Abstract

The invention discloses a uniform light-transmitting polypropylene composition as well as a preparation method and application thereof. The uniform light-transmitting polypropylene composition comprises the following components in parts by weight: 70 to 95 parts of polypropylene, 5 to 30 parts of vulcanized ethylene propylene diene monomer powder, 0.01 to 0.5 part of an antioxidant, 0.01 to 5 parts of a light stabilizer and 0.01 to 0.5 part of a lubricant, wherein the gel content of the vulcanized ethylene propylene diene monomer powder is greater than or equal to 85 wt.%. The light transmission uniformity of polypropylene is improved by using the vulcanized ethylene propylene rubber with the gel content of more than or equal to 85 wt.%. After the ethylene propylene diene monomer is subjected to crosslinking treatment to reach relatively high gel content, the 'island' structure of the rubber phase in the polypropylene matrix is stable, and does not deform and generate orientation change along with the flowing direction of the material, so that the light transmittance or haze of different parts of a polypropylene injection molded part is uniform.

Description

technical field [0001] The invention relates to the technical field of modified plastics, and more specifically, to a uniform light-transmitting polypropylene composition and a preparation method and application thereof. Background technique [0002] At present, the automobile industry is ushering in a new round of transformation and upgrading. Electricity, intelligence, and networking have become one of the development trends. New requirements are put forward for automotive materials, such as the application of light-transmitting parts for interior and exterior decoration of automobiles. The light-transmitting material requires the material to have a certain light transmittance and haze. Polypropylene (PP) has the advantages of low density, low cost, and easy processing, and polypropylene is a translucent polymer material with a light transmittance of about 50-80%. It has been widely used in light-transmitting parts for interior and exterior decoration of automobiles super...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects of uneven light transmittance and haze under different injection molding processes described in the above-mentioned prior art, the present invention provides a uniform light-transmitting polypropylene composition, using ethylene propylene vulcanide with a gel content ≥ 85wt.%. Rubber improves the uniformity of light transmission of polypropylene, making the light transmittance and haze of different parts of polypropylene injection molded parts uniform

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