摘要:
The present invention provides a lubricating oil composition in contact with a silver-containing material, which comprises: a lubricant base oil made of a mineral base oil and/or a synthetic base oil; (A) metallic detergent; (B) one or more species of alkenyl succinimide and/or boron-containing alkenyl succinimide; and (C) zinc dialkyl dithiophosphate, wherein the content of these components to the total mass of the lubricating oil composition are defined as, (A) component: 0.12-2.0 mass % as metal content; (B) component: 0-0.03 mass % as boron content, 0.005 mass % to less than 0.08 mass % as nitrogen content, and the mass ratio (B/N) between the boron content (B) and the nitrogen content (N) is 0-0.55; and (C) component: 0.005-0.10 mass % as phosphorous content. As a lubricating oil in contact with silver-containing material, the lubricating oil composition can inhibit sulfidation corrosion of silver while containing zinc dialkyl dithiophosphate.
摘要:
The present invention relates to lubricating oil compositions comprising sulfurised esters that exhibit good antioxidancy performance whilst maintaining nitrile elastomer seal compatibility
摘要:
An engine lubricant that is substantially free of zinc and phosphorous contains an antiwear additive comprising borated 1,2 epoxy mixed polybutenes having an average carbon number in the range of C20 to about C120.
摘要:
There is disclosed a lubricant composition comprising a major amount of a base oil; and a minor amount of a synergistic additive composition comprising: (i) a triazole compound substituted with an aryl moiety, with the proviso that the triazole compound is not an alkyl bis-3-amino-1,2,4-triazole; and (ii) a nitrogen-containing compound represented by the formula: wherein R1 and R2 are each independently selected from the group consisting of at least one aryl moiety comprising from about 6 to about 30 carbon atoms, hydrogen, halogen, hydroxy, hydrocarbyl, substituted hydrocarbyl, amino, amido, phosphoro, and sulfono.
摘要:
Lubricating oil compositions particularly suitable for automatic transmissions comprising a lubricating base oil, (A) a boron-containing ashless dispersant in an amount of 0.02 to 0.1 percent by mass in terms of boron, based on the total mass of the composition, (B) an alkaline earth metal-based detergent with a base number of 0 to 500 mgKOH/g in an amount of 0.01 percent by mass or more in terms of alkaline earth metal, based on the total mass of the composition, and (C) an alkali metal borate or a hydrate thereof and having excellent anti-wear properties and improved fatigue life by inhibiting pitching.
摘要:
There is disclosed a lubricating composition having a base oil, a friction modifier, and a dispersant, wherein the lubricating composition has less than about 325 ppm of boron. Methods of making and using the disclosed lubricating composition are also disclosed.
摘要:
A method for improving fuel efficiency and reducing frictional properties while maintaining or improving deposit control, in an engine lubricated with a lubricating oil. The lubricating engine oil has a composition including from 75 to 95 wt % of lubricating oil base stock selected from the group consisting of a Group I base stock, a Group II base stock, a Group III base stock, a Group IV base stock, a Group V base stock and combinations thereof; a friction modifier mixture comprising a polymeric ethoxylated fatty acid ester having a molecular weight of greater than or equal to 2000 at from 0.1 to 1.0 wt. % and an organic molybdenum containing friction modifier contributing from 80 to 500 ppm of elemental molybdenum, and an overbased calcium salicylate detergent contributing from 200 to 2000 ppm of elemental calcium; and one or more other lubricating oil additives. The lubricating engine oils are useful in internal combustion engines including direct injection, gasoline and diesel engines.
摘要:
A lubricating oil composition for an internal combustion engine including: (A) a lubricant base oil having a kinematic viscosity at 100° C. of 2 to 5 mm2/s; (B) a metallic detergent in an amount of 500 to 2500 mass ppm in terms of Ca and 100 to 1000 mass ppm in terms of Mg, on the basis of the total mass of the composition, the metallic detergent including both (B1) a Ca-containing metallic detergent and (B2) a Mg-containing metallic detergent; (C) a boron-containing additive in an amount of 50 to 1000 mass ppm in terms of boron on the basis of the total mass of the composition, wherein the boron-containing additive is oil-soluble or oil-dispersible and is stable in oil, and wherein the boron-containing additive may compose at least a part of the component (B); and (D) an oil-soluble organic Mo compound in an amount of 100 to 2000 mass ppm in terms of Mo on the basis of the total mass of the composition, wherein a mass ratio (MB/Mg) of boron content of the composition (MB) to Mg content of the composition (Mg) is 0.5 to 10.
摘要:
A process for producing a borated polyalkenyl succinimide dispersant composition in which the boron is incorporated primarily as cyclic metaboric acid moieties and the equivalents of boron incorporated per equivalent of nitrogen in the succinimide carrier is greater than 2; in which process a slurry of orthoboric acid is added to a polyalkenyl succinimide to form a reaction mixture, which reaction mixture is then heated under conditions (at a temperature and pressure and for a time) sufficient to remove from the reaction mixture from about 0.8 to about 1.2 moles of water of reaction per mole of boric acid charged.
摘要:
The present invention relates to lubricating oil compositions comprising sulfurised esters that exhibit good antioxidancy performance whilst maintaining nitrile elastomer seal compatibility