公开(公告)号：US20190292614A1

公开(公告)日：2019-09-26

申请号：US16318416

申请日：2017-12-22

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Takashi KONDO ,  Rikki HOMMA ,  Katsumi ICHITANI

IPC: C21D1/60 ,  C08L71/02 ,  C08J3/03

Abstract: Provided is a water-based quenching liquid composition which is slow in a cooling rate and is able to suppress quenching crack. The water-based quenching liquid composition is one containing water (A), a linear polyalkylene glycol compound (B), and a branched polyhydric alcohol alkylene oxide adduct (C), wherein the linear polyalkylene glycol compound (B) has a mass average molecular weight of 10,000 or more, and the branched polyhydric alcohol alkylene oxide adduct (C) is a mixed adduct of alkylene oxides having 2 to 3 carbon atoms and has a mass average molecular weight of 10,000 or more.

公开(公告)号：US20210053131A1

公开(公告)日：2021-02-25

申请号：US16982828

申请日：2019-03-26

Applicant: Idemitsu Kosan Co.,Ltd.

Inventor： Takashi KONDO ,  Tomohiko KITAMURA

IPC: B23H1/08 ,  C10M143/14 ,  C10M169/04

Abstract: The present invention relates to an electric discharge machining oil composition and an electric discharge machining method capable of enhancing machining speed in electric discharge machining. This electric discharge machining oil composition is characterized by including (A) a base oil, and (B) one or more types of petroleum resin selected from hydrogenated products of copolymers of dicyclopentadiene and an aromatic compound and having a softening point of 75 to 185° C. and a mean molecular weight (Mn) of 670 to 3000, wherein the kinematic viscosity of the electric discharge machining oil composition at 40° C. is 1 to 10 mm2/s. Further, the electric discharge machining method is characterized by employing said electric discharge machining oil composition, and includes interposing the electric discharge machining oil composition between a workpiece and an electrode, and generating an electric discharge between the workpiece and the electrode in this state to machine the workpiece.

公开(公告)号：US20180216024A1

公开(公告)日：2018-08-02

申请号：US15506121

申请日：2015-08-26

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Tomoya MATSUMOTO ,  Masato KANEKO ,  Takashi KONDO

IPC: C10M137/04 ,  C10M107/34 ,  C10M171/00 ,  C09K5/04 ,  C10M105/38 ,  C10M107/24

CPC classification number: C10M137/04 ,  C09K5/04 ,  C10M105/38 ,  C10M107/24 ,  C10M107/34 ,  C10M153/04 ,  C10M169/04 ,  C10M171/008 ,  C10M2207/026 ,  C10M2207/046 ,  C10M2207/2835 ,  C10M2209/043 ,  C10M2209/1033 ,  C10M2223/041 ,  C10M2225/00 ,  C10M2229/02 ,  C10N2220/302 ,  C10N2220/303 ,  C10N2220/305 ,  C10N2220/306 ,  C10N2230/06 ,  C10N2240/30

Abstract: The refrigerator oil according to the present invention includes a base oil including an oxygen-containing organic compound and a phosphorus-based compound represented by the following general formula (1). In the formula (1), n represents an integer of 1 to 10; R1 to R8 each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; and Ar represents a divalent hydrocarbon group having 2 to 20 carbon atoms.