摘要:
The present disclosure relates to methods, systems, hydraulic fluids and additives for reducing the rate of surface current degradation for components in a hydraulic system, wherein the hydraulic system is exposed to phosphate-ester-based hydraulic fluid.
摘要:
Disclosed is a complex alcohol ester composition comprising a polyester in which at least two molecules of a polyol represented by a formula I: R(OH)n (wherein R represents an n-valent aliphatic, alicyclic or aromatic group, one or more carbon atoms not adjacent to each other in R may be individually substituted with an oxygen atom, and n indicates an integer of 2 or more) are linked through at least two ester bonds via at least one molecule of a polybasic acid, and at least a part of the non-linked side chain ends of the polyol have a group represented by a formula II: (AO)kR2 (wherein R2 represents a hydrocarbon group, A represents a divalent linking group, and k indicates an integer) via a polybasic acid. The complex alcohol ester composition can be used a lubricant agent.
摘要:
The antiwear performance of turbine oils containing polymerized amine antioxidants and antiwear additives is maintained at or enhanced beyond the level as that of turbine oils containing monomeric amine antioxidants by employing as the antiwear additive a resorcinol bis(diphenylphosphate) (RDP). The deposit formation resistance performance of turbine oils containing monomeric and/or polymeric amine antioxidant is improved by employing RDP.
摘要:
The deposit formation resistance performance of turbine oils containing amine antioxidants and antiwear additives is enhanced beyond the level of that of turbine oils containing tricresyl phosphate antiwear additive by employing as the antiwear additive a 4,4′-(Isopropylidenediphenyl)bis(diphenyl phosphate).
摘要:
The present invention relates to a glass substrate for a magnetic recording medium, which is a disk-shaped glass substrate for a magnetic recording medium having a circular hole at the center thereof, in which the glass substrate for a magnetic recording medium has an inner peripheral side surface, an outer peripheral side surface and both main surfaces, and the both main surfaces have parallelism of 3.2 μm or less in at least a recording and reproducing region thereof.
摘要:
The present invention relates to a lubricating composition containing a dispersant, a corrosion inhibitor and an antioxidant. The invention further provides a method for lubricating a mechanical device with the lubricating composition.
摘要:
The present invention provides a multifunctional lubricant additive package or composition for improving load-carrying capacity, pressure resistance, surface fatigue life, and other performance characteristics of a lubricant or base oil. The composition typically includes four components: (a) an alkyl or aryl neutral phosphate, (b) a long-chain organic partial ester, (c) an aryl or alkyl phosphite, and (d) a phenol compound. The present invention further provides a multifunctional lubricant having improved performance characteristics, which are obtained by mixing a lubricant with the above-described multifunctional lubricant additive package or composition.
摘要:
The present invention provides a composition for improving load carrying capacity, extreme pressure performance, surface fatigue life, and other performance characteristics of a lubricant. The composition includes a base stock and a combination of two, three, or all of a friction modifier, and antiwear additive, an extreme pressure additive, and a surface fatigue life modifier. The present invention further provides a method for improving the performance characteristics of a lubricant. The method includes a step of mixing a lubricant with the above-described multifunctional lubricant additive composition or mixing a lubricant base stock with the above-described multifunctional lubricant additive composition.
摘要:
The present invention relates to an apparatus and method for delivering manganese from a lubricant source into a fuel combustion system or to the exhaust therefrom. By the present invention, manganese from the lubricant will interact with phosphorus, sulfur, and/or lead from the combustion products. In this manner, the manganese scavenges or inactivates harmful materials which have migrated into the fuel or combustion products, and which can otherwise poison catalytic converters, sensors and/or automotive on-board diagnostic devices. The present invention can also lead to improved durability of exhaust after treatment systems.
摘要:
The present invention relates, generally, to a high temperature stable mixed polyol ester lubricant composition partly containing an aromatic carboxylic acid ester and a process of making the same. Typically, the aromatic acid ester is benzoic acid, and the lubricant composition preferably comprises a mixture of linear C5, i-C9, and linear C7-10 aliphatic carboxylic acid. The esters are preferably formed from an aliphatic polyol. These mixed polyol esters are useful in aero-derived gas turbine engines.