Abstract:
The invention provides a grease composition comprising a base oil consisting of a fluorinated oil and an antirust agent, wherein said antirust agent comprises an aliphatic dibasic acid salt of the formula (1) in an amount of not less than 0.1% by mass and less than 1.0% by mass based on the total mass of the grease composition: (CH2)n(COO)2Mm (1) wherein n is an integer of 1 to 19, M is an alkali or alkaline earth metal, m is 2 when M is an alkali metal and m is 1 when M is an alkaline earth metal, and a bearing wherein the grease is packed. The grease exerts less effects on the environment. It is low in evaporation loss at a high temperature, shows good antirust property and can be suitably used in a ball bearing operated at a high temperature.
Abstract:
The present invention is directed to a soluble oil composition capable of forming stable emulsions exhibiting superior performance and possessing excellent utility as cutting oil for machines. The composition comprises an overbased alkaline earth metal sulfonate possessing anti-wear properties.
Abstract:
The invention relates to the use of ionic liquids for production of water-resistant lubricating grease compositions, which are used in a temperature range from at least 30° C. to at least 180° C. and have good anticorrosion properties.
Abstract:
A process for the manufacture of a polyol (per)fluoropolyether derivative, comprising: 1. reacting at least one triol having two protected hydroxyl functions and a free hydroxyl group with an activating agent, to yield an activated protected triol; 2. reacting the activated protected triol with a functional (per)fluoropolyether derivative of formula: T2-O—Rf-T1, wherein: Rf represents a fluoropolyoxyalkene chain which is a fluorocarbon segment comprising ether linkages in main chain; T1 and T2, equal to or different from each other, are independently selected from non-functional groups of formula: —CF3, —CF2—CF3, —CF2Cl, —CF2CF2Cl, —CF2—COF, —COF: and functional hydroxyl groups comprising at least one hydroxyl group, with the provisio that at least one of T1 and T2 is a functional hydroxyl group as above detailed to yield a protected polyol (per)fluoropolyether derivative; and 3. deprotecting the protected polyol (per)fluoropolyether derivative to yield the polyol (per)fluoropolyether derivative.
Abstract:
The use of pentafluoropropene (HFO-1225) and tetrafluoropropene (HFO-1234) in refrigeration equipment is disclosed. These materials are generally useful as refrigerants for heating and cooling, as blowing agents, as aerosol propellants, as solvent composition, and as fire extinguishing and suppressing agents.
Abstract:
The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.
Abstract:
Lubricants for lubricating surfaces of microelectromechanical devices are disclosed. Specifically, the lubricants can be applied to the contacting surfaces of the microelectromechanical devices so as to remove stiction of the contacting surfaces.
Abstract:
The present invention provides compositions comprising an HFC component and a non-HFC component consisting essentially of methanol, having boiling points that are unexpectedly low and relatively constant, and uses thereof.