Mitsubishi Chemical Corporation

Nobutake Mise

Yutaka Fukuyama

Takashi Hirasa

Shinichi Kanamaru

Mamoru Nakayama

Akihiro Matsuki

Eihachi Takamura

Masahiro Yamada

Hiroshi Takimoto

Hiroshi Maeda

Yoshihiro Omae

Akinori Sakaue

Makoto Ishizu

Takaharu Yamamoto

Masanobu Ishida

Yuuichi Sekine

Koichi Nakayama

Susumu Nakajima

Shigeru Kawakami

Tsuyoshi Yamaguchi

Hiroaki Takehara

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

A carbon black having an average particle size of at most 13 nm, D of at most 80 nm, a D /D ratio of at most 0.6 and at least pH 5.

Carbon black and process for producing the same

Carbon black, process for producing the same, and aqueous dispersion and

A carbon black having a D1/2/Dmod ratio of at most 0.53.

Easily dispersible coloring carbon black obtained by compacting carbon black powder material to have a bulk density of from 0.10 to 0.50 g/cm.sup.3 and having an initial dispersion of at most 5.0%.

Easily dispersible coloring carbon black and process for preparing an ink

A recording liquid containing carbon black dispersed in an aqueous medium, wherein the volume ratio of carbon black having a particle size of at least 0.2 .mu.m to the total carbon black is at least 50% by volume, and the volume ratio of carbon black having a particle size of at least 0.6 .mu.m to the total carbon black is at most 20% by volume.

Recording liquid

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Kitakyushu, Japan

Nobutake Mise