Idemitsu Kosan Company, Limited

Hiroki Sekiguchi

Toshiyuki Tsubouchi

Yukio Yoshida

Hidetoshi Koga

Sumihiro Oda

Go Watanabe

Akihiro Shishikura

Yukitoshi Fujinami

Yoshio Hironaka

Kouji Takane

Yusuke Nakanishi

Harutomo Ikeda

Masatoshi Saitou

Yoshiyuki Suetsugu

Asami Koga

Masashi Machida

Genki Okuyama

Nobuhide Tanino

Shinichiro Ogawa

Tomonobu Takada

Provided are a lubricating oil degradation evaluation system and a lubricating oil degradation evaluation method capable of immediately evaluating degradation and a contamination state of a lubricating oil by including: a storage unitthat stores evaluation reference dataregarding evaluation of degradation of a lubricating oil; a creation unitthat acquires imaging dataof an evaluation lubricating oil serving as an evaluation target captured by an imaging apparatushaving a communication function and creates image analysis dataregarding degradation of the evaluation lubricating oil from the imaging data; and an evaluation unitthat creates an evaluation resultof a degree of degradation of the evaluation lubricating oil from the image analysis dataon the basis of the evaluation reference data

Lubricating oil degradation evaluation system and lubricating oil degradation evaluation method

Provided is a grease composition including a base oil (A) containing an alkyl naphthalene (A1) and an aliphatic diurea (B) represented by general formula (b1):R&#x2014;NHCONH&#x2014;R&#x2014;NHCONH&#x2014;R&#x2003;&#x2003;(b1)

Grease composition

Provided is a grease composition which is excellent in fire extinguishing performance without water and can suppress fuming, malodor, and liquefaction on burning and a method for producing the grease composition. A grease composition contains a base oil (A), a thickener (B), and a fire retardant (C), wherein the base oil (A) contains a base oil (A1) having a 40&#xb0; C. kinematic viscosity of 300 mm/s or more, a sulfur content of 20 ppm by mass or less, and an initial boiling point of 400&#xb0; C. or higher, the fire retardant (C) is at least one of aluminum hydroxide (C1) and 1,3,5-triazine-1,3,5 (2H, 4H, 6H)-tris(ethanol) (C2), and a content of the fire retardant (C) is 1.0 to 12.0 mass % based on a total amount of the grease composition.

Grease composition, method for manufacturing grease composition, and method for using grease composition

A grease composition contains a calcium sulfonate complex grease and an additive. The additive includes an overbased metal sulfonate and an antioxidant. The overbased metal sulfonate is preferably an overbased calcium sulfonate. The antioxidant is preferably an aminic antioxidant.

A bearing grease composition contains a (A) thickener and a (B) base oil, in which the (A) thickener is a urea thickener represented by a formula (I) below, and, in observation of a transmission image in the bearing grease composition, a transmission-image-area ratio of an aggregation part having a transmission image area exceeding 40 &#x3bc;min the urea thickener is 15% or less relative to a total observation area.RNHCONHRNHCONHR&#x2003;&#x2003;(I) In the formula, Rand Reach independently represent: an (a1) monovalent chain hydrocarbon group having 6 to 22 carbon atoms; an (a2) monovalent alicyclic hydrocarbon group having 6 to 12 carbon atoms; and the like, and Rrepresents an (a4) divalent aromatic hydrocarbon group having 6 to 15 carbon atoms.

Grease composition for bearing

A powder metallurgy lubricant includes an aromatic carboxylic acid represented by a formula (1),(Z)n-Ar&#x2014;COOH&#x2003;&#x2003;(1)where Ar represents an aryl group and Z represents a substituent directly bonded to the above aryl group and is one of R, OR, OCOR and COOR, R representing one of an alkyl group, alkenyl group and alkynyl group and n being an integer in a range from 1 to 4. Z may be mutually the same or different when n is 2 or larger.

Metallurgical lubricant powder and metal powder composition

In a reaction in which a boron trifluoride complex is used as a catalyst, the expensive and harmful boron trifluoride complex is separated from a reaction mixture containing the boron trifluoride complex by separating the boron trifluoride complex present in the reaction mixture by using a saturated hydrocarbon-based solvent.

Recovery method and recycling method for boron trifluoride complex

An ester compound is represented by the following formula (1). In the formula: Rand Reach independently represent an alkyl group having 5 to 18 carbon atoms; Rrepresents a hydrogen atom or an alkyl group having at most 5 carbon atoms; Rrepresents hydrogen or CHOR; Rrepresents an alkyl group having 5 to 18 carbon atoms; and n represents an integer of 1 to 3.

Ester compound, lubricant base oil, lubricant, grease base oil, and grease

A lubricating oil composition of the invention contains longifolene represented by the following formula (1), that is, (1S,3aR,4S,8aS)-4,8,8-trimethyl-9-methylene-decahydro-1,4-methanoazulene. 

Lubricating oil composition and lubricating oil composition for continuously variable transmission

Provided is a lubricating oil for continuously variable transmissions characterized by that used as a base oil are a synthetic oil I having the following properties:

Lubricating oil for non-stage transmission

A lube base oil which comprises at least one hydrocarbon compound having as the basic skeleton a structure represented by any of the general formulae (I) to (VI) and has a viscosity at &#x2212;40&#xb0; C. of 40 Pa&#xb7;s or lower and a viscosity index of 80 or higher, (wherein p is an integer of 1 to 10, provided that in the formulae (I) and (II), p is not 1). It satisfies the coefficient of high-temperature traction, low-temperature flowability, and viscosity index on a high level. 

Lube base oil and lubricating oil composition

The invention provides processes for the recovery of a catalyst which are to be applied to the reactions wherein boron trifluoride or a complex thereof is used as the catalyst, that is, (I) a process for the recovery of a catalyst which comprises using as the reaction solvent a solvent containing a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound and, after the completion of the reaction, separating the reaction solvent from the reaction mixture; and (II) a process for the recovery of a catalyst which comprises extracting boron trifluoride or a complex thereof from the reaction mixture after the completion of the reaction by using a hydrofluorocarbon compound and/or an oxygenic hydrofluorocarbon compound as the extracting solvent. According to the processes, boron trifluoride or complexes thereof used as catalyst can be easily separated from the reaction mixtures and re-used.

Processes for the recovery and recycling of boron trifluoride or complexes thereof

The present invention relates to a novel triketone derivative having a specific structure and a herbicide containing the triketone derivative as an active ingredient. The herbicide is effective for controlling weeds which inhibit growth of crop plants, inter alia, for paddy weeds such as and

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Sodegaura, Japan

Hiroki Sekiguchi