Abstract:
An improved detergent for use in hydrocarbon fuels comprising the composition produced by mixing (1) the Mannich reaction product of a polyisobutene-substituted phenol, (preferably, where the polyisobutene from which the substituted phenol is derived contains at least 70% terminal olefinic double bonds of the vinylidene type); an aldehyde; and an amine, preferably, ethylene diamine; and (2) a compound selected from the group consisting of an alkylbenzene sulfonic acid, an alkylnapthalene sulfonic acid, acetylaetone and mixtures thereof. Preferably, the alkylbenzene and alkylnapthalene sulfonic acid is selected to be a (C6 to C18) alkylbenzene sulfonic acid/napthalene sulfonic acid, especially preferred being dodecylbenzene sulfonic acid.
Abstract:
The present invention provides a lubricating composition containing (a) an oil of lubricating viscosity; (b) a corrosion inhibitor; and (c) an antiwear agent comprising at least one of (i) polyhydric alcohol with oxyalkylene groups, (ii) a fatty amine, or (iii) mixtures thereof, wherein the lubricating composition has a total sulphated ash content of less than 0.8 wt %. The invention further provides for the use of the lubricating composition in an internal combustion engine.
Abstract:
A composition comprises a sulphur free reaction product of: (a)(i) a hydrocarbyl substituted aromatic compound containing an acidic group selected from the group consisting of a carboxylic group, a hydroxyl group and mixtures thereof; and (a)(ii) an organic nitrogen-containing base reacted with the acidic group. The composition is obtained by a preparatory process and is useful in a method for lubricating an internal combustion engine to include where the lubricant has reduced levels of sulphur, phosphorus and sulphated ash.
Abstract:
The invention provides a lubricating composition containing an oil of lubricating viscosity and a hydrogenated copolymer of an olefin block and vinyl aromatic block, wherein the copolymer is optionally functionalised. The invention further provides a method for preparing a hydrogenated copolymer; and the use of the lubricating composition.
Abstract:
The invention provides a lubricating composition containing an oil of lubricating viscosity and a hydrogenated copolymer of an olefin block and vinyl aromatic block, wherein the copolymer is optionally functionalized. The invention further provides a method for preparing a hydrogenated copolymer; and the use of the lubricating composition.
Abstract:
The present invention relates to a method of lubricating an aluminium-composite surface by supplying to the aluminium composite surface (typically an internal combustion engine aluminium surface) a lubricating composition comprising an oil of lubricating viscosity and an ashless antiwear agent.
Abstract:
The present invention is directed to fuel additive compositions of detergents combined with fluidizers and to hydrocarbon fuel compositions containing these fuel additive compositions. The fuel additive compositions of the present invention combine a Mannich detergent, formed from reaction of an alkylphenol with an aldehyde and an amine, with a fluidizer that can be a polyetheramine or a polyether or a mixture thereof and, optionally, with a succinimide detergent. Fuel compositions containing these fuel additive compositions are very effective in reducing intake valve deposits in gasoline fueled engines, especially when the weight ratio of detergent(s) to fluidizer(s) is about 1:1 on an actives basis.