Mitsubishi Gas Chemical Company, Inc.

Mitsubishi Gas Chemical Company Co., Inc.

Yasuhiro Hirai

Nobuyuki Koike

Jitsuo Oishi

Hitoshi Sakamoto

Yuzuru Takahashi

Yukio Sakai

Koichi Kanno

Takahumi Yoshimura

Kyoko Shibahara

Takaaki Higashiizumi

Toshiaki Yamada

Akikazu Amagai

Masahiko Ishikawa

Takao Kawaki

Takashi Kojima

Takafumi Yoshimura

Hajime Ban

A method for preparing a modified optically isotropic pitch comprising, preparing a synthetic pitch by reacting a member selected from the group consisting of a conjugated polycyclic hydrocarbon containing a low molecular weight alkyl group or a material containing such a substituted hydrocarbon in the presence of hydrofluoric acid/boron trifluoride, and treating the synthetic pitch by passing an oxidizing gas through the synthetic pitch at elevated temperatures.

Method for producing isotropic pitch, activated carbon fibers and carbon materials for non-aqueous secondary battery anodes

Method for producing isotropic pitch, activated carbon fibers and carbon

Mesophase pitch that has a softening point of no more than 250.degree. C., a pyridine-insolubles content of no more than 50% and a n-heptane solubles content of 3-10%, with the n-heptane solubles experiencing a weight loss of no more than 15% at 450.degree. C. as measured by thermogravimetry is produced by polymerizing a condensed polycyclic aromatic hydrocarbon or a substance containing it in the presence of HF and BF.sub.3. This mesophase pitch is suppressed satisfactorily in its tendency to smoke during spinning and, additionally, it has a low enough softening point to exhibit outstanding spinnability. Hence, the pitch allows for high-volume spinning to be performed continuously for a prolonged time without causing extensive fouling of the surface of spinning nozzles.

Pitch with reduced tendency to smoke during spinning and a process for

A heat-resistant resin composition comprising a melt-kneaded product of:

Heat-resistant resin composition

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Tukuba, Japan

Yasuhiro Hirai