Idemitsu Kosan Company, Limited

Masami Yamanaka

Fumiaki Takagi

Katsumi Ichitani

Kazuaki Abe

Hiroshi Kawasaki

Youichiro Jido

Toshifumi Satoh

Takashi Urabe

Toyoji Kakuchi

Norihito Kanno

Ryosuke Sakai

An aqueous heat treatment liquid composition exhibiting a favorable rust resistance with a high cooling capability and a high uneven-cooling resistance is provided. The aqueous heat treatment liquid composition contains a hyperbranched polyglycerol. A mass average absolute molecular weight of the aqueous heat treatment liquid composition is preferably in a range of 5,000 to 500,000. When the aqueous heat treatment liquid composition is used for quenching of a metallic component, the aqueous heat treatment liquid composition can exhibit a favorable rust resistance with a high cooling capability and a high uneven-cooling resistance.

Aqueous heat treatment liquid composition

Provided is a water-based lubricant comprising a hyperbranch-type polyglycerol having an absolute molecular weight of from 5,000 to 500,000. The water-based lubricant has a small friction coefficient and is excellent in lubrication performance and defoamability, as compared with conventional water-based lubricants comprising an ethylene/propylene oxide copolymer, and is favorable, for example, for a water-based metal processing agent and a hydraulic pressure fluid.

Aqueous lubricant

To provide a water-soluble working fluid which less adversely affects the human body and the ecological system as compared with conventional water-soluble working fluids, which has high rotting resistance, and which provides excellent working performance. The water-soluble working fluid of the invention contains methyldicyclohexylamine.

Water-soluble processing oil agent

Additive composition

Cutting or grinding oil composition

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Chiba, Japan

Masami Yamanaka