Abstract:
A lubricant composition comprising a major proportion of polyalkylene glycol of lubricating viscosity and a minor proportion dissolved therein of (a) at least one sulphur-containing antiwear or extreme pressure agent, (b) at least one amine salt of at least one partially esterified monothiophosphoric acid, and (c) at least one amine salt of at least one partially esterified phosphoric acid. Such compositions have improved resistance to wear, oxidative degradation and metallic corrosion.
Abstract:
A cost-effective antioxidant composition which exhibits good compatibility toward fluoroelastomers comprises a combination of (i) an oil soluble mixture of sterically-hindered tertiary alkylated monohydric phenols, (ii) an oil-soluble mixture of sterically-hindered tertiary alkylated methylene-bridged polyphenols, and (iii) at least one oil-soluble aromatic secondary amine. The proportions of (i), (ii) and (iii) are such that the weight percentage of nitrogen in component (iii) relative to the total weight of components (i), (ii) and (iii) is in the range of 0.05% to 1.5%, and the weight ratio of monohydric phenols:methylene-bridged polyphenols in the composition is in the range of 15:1 to 1:2.
Abstract:
An acyclic hydrocarbyl substituted succinimide, or acyclic hydrocarbyl substituted succinamide, and/or acyclic hydrocarbyl substituted succinic acid ester/amide dispersant formed with polyamine, which has been reacted with a dicarboxylic acid in which the two carboxyl groups are separated from each other by at least 3 aliphatic carbon atoms. Lubricant compositions and additive concentrates capable of passing the CCMC Viton Seal Test (CEL L-39-T087 Oil/Elastomer Compatibility Test) can be formed using dispersants made in this manner.
Abstract:
An acyclic hydrocarbyl substituted succinimide, or acyclic hydrocarbyl substituted succinamide, and/or acyclic hydrocarbyl substituted succinic acid ester/amide dispersant formed with polyamine, which has been reacted with a dicarboxylic acid in which the two carboxyl groups are separated from each other by at least 3 aliphatic carbon atoms. Lubricant compositions and additive concentrates capable of passing the CCMC Viton Seal Test (CEL L-39-T087 Oil/Elastomer Compatibility Test) can be formed using dispersants made in this manner.
Abstract:
A composition suitable for use as a turbine or rust and oxidation (R&G) oil comprising a major portion of a base oil and (A) at least one neutral rust inhibitor, wherein the base oil has a viscosity index of greater than 80, a saturates content of greater than 90 wt% and a sulfur content of 0.5 wt% or less providing improved filterability. Further improved hydrolytic stability may be obtained by the addition of (B) a compound of the formula:
Abstract:
Lubricant compositions especially useful as hydraulic fluids contain a metal-free anti-wear or loadcarrying additive containing sulphur and/or phosphorus and an amino succinate ester as corrosion inhibitor. Such compositions are free from heavy metals and have improved environmental acceptability where heavy metals are to be avoided, e.g. in agriculture. The lubricant base stock may be a biodegradable natural oil.
Abstract:
A lubricant composition comprising a major proportion of polyalkylene glycol of lubricating viscosity and a minor proportion dissolved therein of (a) at least one sulphur-containing antiwear or extreme pressure agent, (b) at least one amine salt of at least one partially esterified monothiophosphoric acid, and (c) at least one amine salt of at least one partially esterified phosphoric acid. Such compositions have improved resistance to wear, oxidative degradation and metallic corrosion.
Abstract:
Lubricants and lubricating oils are provided which contain an oil-soluble copper-containing antioxidant and an oil-soluble dispersant prepared by a process which comprises (i) reacting at least one polyamine with at least one acyclic hydrocarbyl substituted succinic acylating agent in which the substituent contains an average of at least about 40 carbon atoms, and (ii) reacting the product so formed with a vicinal dicarboxylic acylating agent having 4 to about 30 carbon atoms in the molecule, the process being characterized in that in step (i) the acylating agent is reacted with the polyamine in a mole ratio of from 1.05 to about 2.85 moles of acylating agent per mole of polyamine, and in that in step (ii) the mole ratio of the vicinal dicarboxylic acylating agent is from 0.10 to 2.50 moles per mole of said polyamine with the proviso that the total mole ratio of the acylating agents in (i) and (ii) per mole of said polyamine is at least 2.40. Such compositions exhibit enhanced compatibility toward fluoroelastomers while at the same time possess enhanced oxidative and thermal stability.
Abstract:
A friction reducing additive composition comprising a long chain succinimide derivative and a long chain amide has superior friction reducing properties, especially in wet brake systems for tractors and other vehicles.
Abstract:
A composition suitable for use as a turbine or rust and oxidation (R&G) oil comprising a major portion of a base oil and (A) at least one neutral rust inhibitor, wherein the base oil has a viscosity index of greater than 80, a saturates content of greater than 90 wt% and a sulfur content of 0.5 wt% or less providing improved filterability. Further improved hydrolytic stability may be obtained by the addition of (B) a compound of the formula: