Abstract:
This invention relates to a lubricating oil composition, comprising: (A) a base oil and (B) a boron-containing compound represented by the formulae(RO)3-B or (RO)2-B-O-B (OR)2 (B-1) (B-II)or a cyclic trimeric structure (B-III), wherein in formulae (B-1), (B-11) and (B-111) each R is independently an organic group and any two adjacent R groups may together form a cyclic group; the lubricating oil composition containing sulfur, boron and optionally phosphorus with the ratio of sulfur to boron to phosphorus being represented by the formula S + 5B + 3P > 0.35 wherein S is the concentration in percent by weight of sulfur in the composition, B is the concentration in percent by weight of phosphorus in the composition; the concentration of sulfur in the lubricating oil composition being from 0.01% to 0.25% by weight; the concentration of phosphorus in the lubricating oil composition being up to 0.08% by weight.
Abstract translation:本发明涉及一种润滑油组合物,其包含:(A)基油和(B)由式(RO)3-B或(RO)2 -OBOB(OR)2(B- 1)(B-II)或环状三聚体结构(B-III),其中在式(B-1),(B-11)和(B-111)中,R各自独立地为有机基团, 基团可以一起形成环状基团; 含有硫与硼与磷的比例的硫,硼和任选的磷的润滑油组合物由式S 1 + B 3 + 3 P 1 0.35表示,其中S 1是 组合物中硫的重量百分比,B 1是组合物中磷的重量百分比浓度; 润滑油组合物中的硫的浓度为0.01重量%至0.25重量%; 润滑油组合物中的磷浓度高达0.08重量%。
Abstract:
A lubricant composition of an oil, a dispersant viscosity modifier of a poly(meth)acrylate copolymer having a nitrogen-containing monomer in an amount to provide at least about 0.4 percent by weight nitrogen to the copolymer, and a succinimide dispersant prepared in the substantial absence of chlorine gives good performance as a transmission fluid.
Abstract:
A composition suitable for reducing sludge and degradation of elastomer seals in engines comprises an oil of lubrication viscosity and a minor amount of a sludge preventing/seal protecting nitrogen containing dispersant, which is a reaction product of a hydrocarbyl-substituted succinic acylating agent having a limited amount of low molecular weight substituent; and a polyamine or condensed polyamine containing less than 20 mole percent of polyamine components of 6 or fewer nitrogen atoms.
Abstract:
The perception of objectionable odors generated from lubricants is minimized by including in said lubricant a thiazole compound and an odor mask.
Abstract:
The present invention relates to a lubricating composition containing a corrosion inhibitor compound and a mixture of two or more dispersants, wherein 0 mole % to less than 50 mole % of the second dispersant molecules contain a carbocyclic ring. The invention further provides a method for lubricating a mechanical device using the lubricating composition.
Abstract:
A composition of a major amount of an oil of lubricating viscosity; a secondary or tertiary amine being represented by the formula R 1 R 2 NR 3 wherein R 1 and R 2 are alkyl groups of at least 6 carbon atoms and R 3 is hydrogen, a hydrocarbyl group, a hydroxyl-containing alkyl group, or an amine-containing alkyl group; and a dispersant, provides high static coefficients of friction and a durable positive slope during oxidative and mechanical stressing, particularly as a friction component of an automatic transmission.
Abstract:
The invention relates to the use of an emulsified fuel in combination with an engine oil that shows a synergistic effect in reducing emissions such as particulate matter, hydrocarbons and/or nitrogen oxides (NO, NO2, N2O, collectively NOx) and/or reducing wear from an engine.
Abstract:
PROBLEM TO BE SOLVED: To provide a certain kind of mixed polysulfides that is characterized by its high abrasion resistance and provide a lubricant and a hydraulic fluid that contains such mixed polysulfides. SOLUTION: This composition contains at least one of compounds selected from the following groups: (A-1) compounds represented by the formula: T T -P (X )-(S)n -S-C(X )-L , (A-2) compounds represented by the formula: T T -P(X )-(s)n - S-(DMTD)-S-J, (A-3) compounds represented by the formula: L -C(X )-(S)n - S-(DMTD)-S-G and (A-4) a mixture of two or more kinds of (A-1), (A-2) and (A-3). In formulas of (A-1), (A-2) and (A-3), (DMTD) is the thiazole nucleus; J is H, SR, -S-P(X )-T T or -S-C(X )-L ; G is H, SR or -S C(X )-L ; T , T , T , T , T and T are independently R, SR or OR; L , L , L and L are independently R, SR, OR or NRR; X , X , X , X , X , X and X are independently O or S; each R is independently a hydrocarbyl group; and (n) is 1-4.
Abstract:
A lubricant and concentrate composition comprises a hindered-phenol-containing diester antioxidant derived from a hydrocarbyl diol or an amide diol. A method for improving the performance of a lubricant composition, especially a lubricant composition for an internal combustion engine, comprises the antioxidant.
Abstract:
A lubricant containing (a) a synthetic base oil composition having an overall kinematic viscosity of at least about 4.8x10 m /s (4.8 cSt) at 100 C and a viscosity index of at least about 110; (b) a dispersant-viscosity modifier; and (c) a sulfur-free functionalized hydrocarbyl-substituted phenol detergent provides improved valve train wear, with longer drain intervals, to heavy duty diesel engines.