Tonen Corporation

Toa Nenryo Kogyo Kabushiki Kaisha

Tonengeneral Sekiyu K.k.

Tomohiro Kato

Takeshi Isoda

Osamu Funayama

Mikiro Arai

Tadashi Suzuki

Narihiko Yoshimura

Toshiaki Kuribayashi

Yuuji Tashiro

Hayato Nishii

Hiroshi Kaya

Hironari Ueda

Hitoshi Ohenoki

Toshihide Kishi

Ichiro Kohshi

Masaaki Ichiyama

Asep Handaya Saputra

Takayuki Date

Tamio Ishiyama

Rika Takatsu

Kouichi Yasuda

Atsuro Takazawa

To provide an oil composition for automatic transmission having high wet friction torque capacity and shudder preventing performance, and excellent also in durability of shudder preventing performance as an automatic transmission oil for lock-up clutch and slip control.

Oil composition for automatic transmission

The invention provides a fluid composition for a fluid coupling, which is excellent in viscosity stability and torque stability, and comprises a polyorganosiloxane base oil having a viscosity of 3,000-500,000 mm.sup.2 /sec at 25.degree. C. and at least one 5-membered heterocyclic compound incorporated in a proportion of 0.01-3.0 wt. % based on the total weight of the composition, said 5-membered heterocyclic compound being selected from the group consisting of thiadiazole derivatives and thiazole derivatives, both, having at least one monovalent group represented by the formula --S.sub.x --R.sup.6 in which R.sup.6 is a saturated or unsaturated monovalent group or atom composed of at least one atom selected from a carbon atom, a hydrogen atom, an oxygen atom, a nitrogen atom and a sulfur atom, and x is a number of 1 or greater.

Fluid composition for fluid coupling

A thermoplastic silicon-containing polymer, which may be a precursor of SiC, and which can be transformed to a thermosetting polymer by copolymerizing it with a thermosetting perhydropolysilazane or polyborosilazane.

Thermosetting copolymers, silicon carbide-based fiber and processes for

A molded body formed of a silicon nitride-based ceramic containing Si and N and optionally O, C and/or a metal. The ceramic is formed from a polysilazane. A molded body may be a composite body which is composed of a matrix of the ceramic and a reinforcing material such as powder or fiber embedded within the matrix or which is composed of ceramic powder bound with a binder formed of the silicon nitride-based ceramic.

Molded articles formed of silicon nitride based ceramic and process for

Growing community of inventors

Saitama-ken, Japan

Tomohiro Kato