A grease is provided which has an improved inflow property of the grease into a lubrication unit and has a long life when used for bearings even under a high temperature environment. A grease composition comprising a base oil and a thickener, characterized in that the base oil contains an ester synthetic oil, the content of the ester synthetic oil is not less than 20% by mass of the total mass of the base oil and the thickener contains a diurea compound represented by the Formula (I):
R.sup.1NHCONHR.sup.2NHCONHR.sup.3,(I) wherein R.sup.2 is a C.sub.6-15 divalent aromatic hydrocarbon group, R.sup.1 and R.sup.3 are the same or different, and represent cyclohexyl or C.sub.8-22 linear or branched alkyl, and the molar ratio of cyclohexyl to the total of cyclohexyl and C.sub.8-22 linear or branched alkyl is 60 to 95%.

A method of manufacturing an overbased calcium sulfonate grease comprising a reduced amount of overbased calcium sulfonate, water and at least one non-aqueous converting agent, where at least a portion of the non-aqueous converting agent is added after one or more delay periods relative to the addition of the water. A delay period may involve the period of time it takes to adjust the temperature of the mixture, a period of time during which the mixture is held at a temperature or within a range of temperatures, and multiples and any combination thereof. These calcium sulfonate greases have improved thickener yield and high dropping points compared to greases of substantially similar composition made without a delay between the additions of water and a non-aqueous converting agent, particularly when a poor quality overbased calcium sulfonate is used.

Natural soap compositions and methods of manufacturing the same having anti-microbial properties for treating and preventing diaper rash and other microbial infections. The soap compositions may contain one or more fatty acids with carbon length ranging from four (C4) to twenty-two (C22) and/or natural fatty acid mixtures of coconut oil, olive oil, and/or tall oil fatty acids which are saponified with lye. The saponification lye may be sodium or potassium hydroxide. In preferred embodiments, the soap compositions contain at least one of sodium or potassium caprate, sodium or potassium caprylate, or mixtures thereof, especially 55:45% caprylate to caprate. The soap compositions are effective at treating or preventing diaper rashes and other microbial infections associated with Candida albicans (Cayeast), Pseudomonas aeruginosa (Psaa Gram negative bacteria), Staphylococcus aureus (Saa Gram positive bacteria), and Aspergillus niger (Ana mold).

Provided herein is a grease composition capable of reducing an amount of wear in sliding parts of various members of automobiles, electrical devices, and the like. The grease composition includes a lubricant base oil, a thickener, an amide compound, and at least one of an -hydroxycarboxylic acid metal salt, and an -hydroxycarboxylic acid metal salt. The hydroxycarboxylic acid metal salts are contained in a total content of 0.1 to 2 mass % with respect to the total amount of the grease composition.

Certain embodiments of the invention provide a lubricating oil composition comprising a lubricating oil base stock and a compound of formula (I):

##STR00001##

or a salt thereof, wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 have any of the values defined in the specification, as well as methods of use thereof.

Object

Objective is to provide a grease composition for a pivot assembly and a pivot assembly bearing filled with the grease composition, and to provide a bearing apparatus as well as a drive apparatus including the bearing apparatus, which is capable of suppressing adhesion of a volatilized component to a magnetic disk or the like even when the grease composition is volatilized by application of the grease composition and the bearing, thereby suppressing occurrence of read/write errors of an HDD.

Solution

Provided are: a grease composition for a pivot assembly bearing including an aromatic ester-based base oil and a thickener, the aromatic ester-based base oil containing an aromatic ester compound having an ester group *(CO)O as a substituent on a ring, where * is a bonding site to an aromatic ring, and having an alkyl group with a total of 8 or more carbon atoms bonded to an oxygen atom of the ester group; a pivot assembly bearing filled with the grease composition for pivot assembly bearing; a bearing apparatus including the pivot assembly bearing; and a disk drive apparatus equipped with the bearing apparatus.

The present invention relates to conveyor lubricant compositions including an emulsion of a lipophilic compound and also including an emulsifier and/or an anionic surfactant. The present invention also relates to methods employing such lubricant compositions. In an embodiment, the method includes applying the present lubricant composition to a conveyor with a non-energized nozzle.

A grease composition includes a base oil, a thickener and at least one kind of an antioxidant selected from an amine-based antioxidant and a phenol-based antioxidant expressed by the following respective general formulas (1) and 2: ##STR00001##
The base oil contains a poly--olefin and a mineral oil. A mass ratio of poly--olefin/mineral oil is 1.25 to 9.

The present invention relates to lubricant compositions for motorcycle engines where the crankcase lubricant is also used to lubricate a wet clutch. The lubricant compositions contain antimony dithiocarbamates in combination with one or more ash-free friction modifiers.

The invention provides a lubricating composition containing an oil of lubricating viscosity, a compound derived from the hydroxy-carboxylic acid and a nitrile compound. The invention further relates to a method of the lubricating an internal combustion engine with the lubricating composition.