Polypropylene composition and molded article

Abstract

To achieve both impact resistance and scratch resistance. [Solution] A polypropylene composition comprising low molecular weight polypropylene, which is block polypropylene or homopolypropylene with an Mw of 200,000 to 380,000; high molecular weight polypropylene, which is block polypropylene with an Mw of 400,000 to 700,000, or homopolypropylene with an Mw of 500,000 to 700,000; and rubber, which is at least one of the following: a rubber component copolymerized with the low molecular weight polypropylene, a rubber component copolymerized with the high molecular weight polypropylene, and a post-added rubber, and further comprising or not comprising a filler containing talc.

Claims

1. Low molecular weight polypropylene, which is block polypropylene or homopolypropylene with Mw 200,000 to 380,000, High molecular weight polypropylene, which is block polypropylene with Mw 400,000 to 700,000, or homopolypropylene with Mw 500,000 to 700,000, A rubber component copolymerized with the low molecular weight polypropylene, a rubber component copolymerized with the high molecular weight polypropylene, and at least one of the post-added rubbers, Contains fillers including talc, The blending ratio is as follows: 100 parts by mass of the low molecular weight polypropylene (including a rubber component copolymerized with the low molecular weight polypropylene); 6 to 165 parts by mass of the high molecular weight polypropylene (including a rubber component copolymerized with the high molecular weight polypropylene); 30 to 70 parts by mass of the rubber (including the rubber component copolymerized with the low molecular weight polypropylene and the rubber component copolymerized with the high molecular weight polypropylene); and 10 to 40 parts by mass of the filler. Polypropylene composition.

2. Low molecular weight polypropylene, which is block polypropylene or homopolypropylene with Mw 200,000 to 380,000, High molecular weight polypropylene, which is block polypropylene with Mw 400,000 to 700,000, or homopolypropylene with Mw 500,000 to 700,000, A rubber component copolymerized with the low molecular weight polypropylene, a rubber component copolymerized with the high molecular weight polypropylene, and at least one of the post-added rubbers, It contains talc and a filler containing fibrous magnesium sulfate, The blending ratio of talc is 10.3 to 17.0 parts by mass per 100 parts by mass of the low molecular weight polypropylene (including a rubber component copolymerized with the low molecular weight polypropylene), and the blending ratio of fibrous magnesium sulfate is 5.3 to 8.7 parts by mass. Polypropylene composition.

3. A molded article formed from the polypropylene composition according to claim 1 or 2.

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