Mitsubishi Chemical Corporation

Mitsubishi Heavy Industries Limited

Akihiro Matsuki

Yutaka Fukuyama

Nobutake Mise

Shinichi Kanamaru

Eihachi Takamura

Yasuharu Suda

Katsuaki Makino

Hiroaki Kuno

Hideyuki Hisashi

Koichi Nakayama

To provide a propylene resin composition excellent in both the electroconductivity and moldability and excellent in their balance, and a molded product thereof. A propylene resin composition comprising from 50 to 98 wt % of a propylene resin having a MFR of from 5 to 300 g/10 min, and from 2 to 50 wt % of carbon black having a 24M4DBP absorption of at least 130 cm/100 g, a dehydrogenation amount of at most 1.2 mg/g at 1,500&#xb0; C. for 30 minutes and a crystallite size (Lc) of from 10 to 17 &#x212b;. A propylene resin molded product which is a propylene resin molded product obtained by molding such a propylene resin composition and which has a volume resistivity of from 10to 10&#x3a9;&#xb7;cm and a MFR of from 1 to 80 g/10 min.

Propylene resin composition and molding thereof

To provide carbon black which improves the electrical conductivity and flowability of a resin composition. Carbon black characterized by having the following characteristics: More preferably, it has the following characteristics:

Carbon black

Pigment composition for liquid toner

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Yokkaichi, Japan

Akihiro Matsuki