A fluid contains a base oil consisting of an alcohol-initiated polyalkylene glycol where polyalkylene glycol component is selected from a homopolymer of 1,2-butylene oxide and copolymer of 1,2-butylene oxide and propylene oxide; a glycerol-initiated unsaturated ester that is free of tertiary carbon atoms and quaternary carbon atoms; and an antioxidant.

A fluid contains a base oil consisting of an alcohol-initiated polyalkylene glycol where polyalkylene glycol component is selected from a homopolymer of 1,2-butylene oxide and copolymer of 1,2-butylene oxide and propylene oxide; a glycerol-initiated unsaturated ester that is free of tertiary carbon atoms and quaternary carbon atoms; and an antioxidant.

A composition having an oil film retention function which an oil film can be stably retained on surfaces of various metals, an anticorrosive agent using same, and insulated terminated electric wire. A composition having oil film retention function for being added to base oil to be applied onto a metal surface and retaining base oil on metal surface, and composition contains a component that is an adduct of an azole compound and acidic alkyl phosphate ester including one or more compounds represented by General Formulae (1) (Chemical Formula 1) P(O)(OR.sub.1)(OH).sub.2 . . . (1) or General Formula (2) (Chemical Formula 2) P(O)(OR.sub.1).sub.2(OH) . . . (2) where R.sub.1 represents an organic group having four or more carbon atoms, and component that is an adduct of a metal and/or organic amine compound and acidic alkyl phosphate ester including one or more compounds represented by General Formulae (1) or (2).

A composition having an oil film retention function which an oil film can be stably retained on surfaces of various metals, an anticorrosive agent using same, and insulated terminated electric wire. A composition having oil film retention function for being added to base oil to be applied onto a metal surface and retaining base oil on metal surface, and composition contains a component that is an adduct of an azole compound and acidic alkyl phosphate ester including one or more compounds represented by General Formulae (1) (Chemical Formula 1) P(O)(OR.sub.1)(OH).sub.2 . . . (1) or General Formula (2) (Chemical Formula 2) P(O)(OR.sub.1).sub.2(OH) . . . (2) where R.sub.1 represents an organic group having four or more carbon atoms, and component that is an adduct of a metal and/or organic amine compound and acidic alkyl phosphate ester including one or more compounds represented by General Formulae (1) or (2).

The present disclosure relates generally to antioxidants. More particularly, the present disclosure relates to lubricating compositions comprising an antioxidant.

The present disclosure relates generally to antioxidants. More particularly, the present disclosure relates to lubricating compositions comprising an antioxidant.

A lubricant composition comprising an oil of lubricating viscosity and 0.01 to 5 percent by weight of a substantially sulfur-free alkyl phosphate amine salt, where at least 30 mole percent of the phosphorus atoms are in an alkyl pyrophosphate salt structure, exhibits good antiwear performance, even in the presence of corrosion inhibitor additives. In the phosphate amine salt, at least 80 mole percent of the alkyl groups are typically secondary alkyl groups of 3 to 12 carbon atoms.

A lubricant composition comprising an oil of lubricating viscosity and 0.01 to 5 percent by weight of a substantially sulfur-free alkyl phosphate amine salt, where at least 30 mole percent of the phosphorus atoms are in an alkyl pyrophosphate salt structure, exhibits good antiwear performance, even in the presence of corrosion inhibitor additives. In the phosphate amine salt, at least 80 mole percent of the alkyl groups are typically secondary alkyl groups of 3 to 12 carbon atoms.

The present invention provides a lubricating oil composition for a transmission which is excellent in seizure resistance and copper corrosion resistance, and which contains a base oil (A), a sulfur-containing compound (B) having no S.sub.n11 (where n.sub.11 is an integer of 2 or more), and a thiadiazole compound (C) having an S.sub.n2113 R.sup.21 group (where R.sup.21 is a linear hydrocarbon group having 1 or more and 24 or less carbon atoms, and n.sub.21 is 1 or 2), a method for lubricating a transmission, including using the same, and a transmission provided with the same.

The present invention provides a lubricating oil composition for a transmission which is excellent in seizure resistance and copper corrosion resistance, and which contains a base oil (A), a sulfur-containing compound (B) having no S.sub.n11 (where n.sub.11 is an integer of 2 or more), and a thiadiazole compound (C) having an S.sub.n2113 R.sup.21 group (where R.sup.21 is a linear hydrocarbon group having 1 or more and 24 or less carbon atoms, and n.sub.21 is 1 or 2), a method for lubricating a transmission, including using the same, and a transmission provided with the same.