Abstract:
A lubricant composition comprising an oil of lubricating viscosity, an amino-functionalized acrylic or methacrylic-containing polymer, comprising about 2 percent to about 8 percent by weight of an amine moiety bearing a tertiary amino group, attached to said polymer through an ester, amide, or imide linkage; and a nitrogen-containing dispersant, provides reduced friction to an internal combustion engine and improved fuel economy.
Abstract:
In accordance with the present invention, it has been discovered that an additive which is substantially insoluble in, has low solubility in and/or is otherwise incompatible with a functional fluid, may be supplied to the functional fluid by use of a gel composition and/or a solid additive composition containing the additive, such that the functional fluid can receive the benefit of the supplied additive and/or contain levels of the additive not otherwise achievable by conventional delivery method due to the incompatibility of the additive with the functional fluid.
Abstract:
A composition of a hindered phenol antioxidant which is substituted in the 4 position by a CH2CH2C(O)OR group, where R is an alkyl group of 2 to 6 carbon atoms, and a dispersant or a detergent, is a useful additive package for lubricant compositions.
Abstract:
A saligenin derivative such as the magnesium salt of a polynuclear bridged phenol product is useful as an additive for a lubricating composition. Up to 11 hydrocarbyl-substituted phenolic aromatic units are bridged by -CH2- or -CH2OCH2 groups, and additional terminal -CHO or -CH2OH substituents may be present. At least one aromatic ring contains a hydrocarbyl substituent of 1 to 60 carbon atoms, and the total number of carbon atoms in all such hydrocarbyl groups should be at least 7.
Abstract:
A process for lubricating an internal combustion engine which contains at least one ceramic part which requires lubrication, or which operates at a temperature of at least 250 DEG C at the top ring reversal position, or which is powered by natural gas, comprising supplying to such an engine a lubricant composition comprising: (a) a major amount of an oil of lubricating viscosity, and (b) a minor amount of a salt of an alkylene-linked polyaromatic molecule, the aromatic moieties of wich comprise at least one hydrocarbyl-substituted phenol and at least one carboxy phenol.
Abstract:
The invention provides a composition containing an oil of lubricating viscosity and an N-substituted malimide. The invention further relates to the use of the lubricating composition in an internal combustion engine.
Abstract:
Lubricants containing metal salts of hydrocarbyl-substituted carboxyalkylene-linked phenols, dihydrocarbyl esters of alkylene dicarboxylic acids, the alkylene group being substituted with a hydroxy group and an additional carboxylic acid group, or alkylene-linked polyaromatic molecules, the aromatic moieties whereof comprise at least one hydrocarbyl-substituted phenol and at least one carboxy phenol, where the hydrocarbyl groups are of sufficient length to provide oil solubility to the salt, exhibit good asphaltene suspension for marine diesel applications. Preferably the salts are overbased.
Abstract:
A composition useful as a lubricant for an automatic transmission comprises an oil of lubricating viscosity and a condensation product of an aromatic polycarboxylic acid or mixtures thereof or a reactive equivalent thereof, having at least two carboxylic groups situated so as to permit formation of a cyclic imide having 5 or 6 atoms in said cyclic structure; with an aliphatic primary amine or alcohol, containing 6 to 60 carbon atoms. _0 0 -0 1 . 0 01 0 - U) 0 > 0D C) C6C DC UO!1Ooid J 1 ue!o!J4G09 1u!odp!N