摘要:
The present invention provides a lubricating oil composition for an internal combustion engine which is very good in base number retention property, detergency at high temperature and valve train anti-wear property and does not substantially contain phosphorus- and/or sulfur-containing anti-wear agent. The composition comprises a lubricant base oil comprising a mineral oil and/or a synthetic oil, (A) 0.001 to 0.5% by mass of an ester of a boric acid in terms of boron element therein and (B) 0.01 to 5% by mass of an ashless antioxidant, wherein said composition contains substantially no metal salts of dithiophosphoric acid and has a sulfur content of 0.2% by mass or less, each percentage being based on a total mass of the composition.
摘要:
Disclosed are polyamino alkenyl or alkyl succinimides which have been modified by treatment with a lactone to yield polyamino alkenyl or alkyl succinimides wherein one or more of the basic nitrogens of the polyamino moiety is substituted with a hydrocarbylcarbonylalkylene group. The additives so disclosed are useful as dispersants in lubricating oils, gasolines, marine crankcase oils and hydraulic oils.
摘要:
Hydraulic fluid compositions having improved properties to rubbers are formed from (A) a nitrogen-atom-containing borate ester derived from an oxyalkylated heterocyclic or alicyclic amine and (B) another borate ester and/or polyoxyalkylene compound.
摘要:
A low water-sensitive hydraulic fluid composition which contains from about 20 to about 96 percent by weight of at least one borate ester as the base fluid. Such low-water sensitive hydraulic fluids are high boiling compositions particularly useful as brake fluids.
摘要:
This invention describes novel trunk piston engine lubricating oil compositions for use in trunk piston engines operating on low sulfur marine residual fuels, as well as methods for lubricating trunk piston engines, methods of using the trunk piston lubricating oil compositions, and methods of making thereof.
摘要:
A lubricating oil composition used in an internal combustion engine is provided. The internal combusting engine uses a fuel that contains at least one fat and oil selected from a group consisting of natural fat and oil, hydrotreated natural fat and oil, transesterified natural fat, and oil and hydrotreated transesterified natural fat and oil. The lubricating oil composition includes: base oil of lubricating oil; a component (A) containing a boron derivative of an alkyl or alkenyl-substituted succinimide compound having a number average molecular weight of 200 to 5000; and a component (B) containing an alkaline earth metal-based detergent. The component (A) is contained by 0.01 to 0.2 mass % in terms of boron of a total amount of the composition while the component (B) is contained by 0.35 mass % or less in terms of the alkaline earth metal of the total amount of the composition.
摘要:
The present invention provides a lubricating composition comprising (a) an oil of lubricating viscosity; (b) a friction modifier; (c) a corrosion inhibitor; (d) an antiwear agent; and (e) a product prepared by heating together: (i) a dispersant; (ii) 2,5-dimercapto-1,3,4-thiadiazole or a hydrocarbyl-substituted 2,5-dimercapto-1,3,4-thiadiazole, or oligomers thereof; (iii) a borating agent;and (iv) optionally a dicarboxylic acid of an aromatic compound selected from the group consisting of 1,3 diacids and 1,4 diacids, or (v) optionally a phosphorus acid compound, said heating being sufficient to provide a product of (i), (ii), (iii) and optionally (iv), which is soluble in an oil of lubricating viscosity. The invention further provides a use for the lubricating composition in a transmission.
摘要:
Functional fluids comprising at least one compound selected from the group consisting of a glycol, a glycol ether, an ester, a hydrocarbon, and mixtures thereof and an effective amount of benzotriazole, a derivative thereof such as tolyltriazole or mixtures thereof and 1,2,4-triazole, a derivative thereof or mixtures thereof. The functional fluids exhibit increased resistance to corrosion and reduced sediment formation and are useful as brake fluids.
摘要:
Compounds of formula I ##STR1## wherein R and R.sup.1 are identical or different and are a radical of the formula ##STR2## where R.sup.2, R.sup.3 and R.sup.4 are each independently C.sub.1 -C.sub.18 alkyl and together contain not more than 22 carbon atoms, and R.sup.3 and R.sup.4 are also hydrogen, or wherein R and R.sup.1 are C.sub.5 -C.sub.6 cycloalkyl, unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted phenyl, or naphthyl, C.sub.7 -C.sub.14 aralyl, furfuryl or thienyl, and wherein Y is --S--, --O--, --NH--, --N(C.sub.1 -C.sub.12 alkyl)--, --CH.sub.2 --, --CH(C.sub.1 -C.sub.12 alkyl)-- or --C(C.sub.1 -C.sub.12 alkyl).sub.2 -- and X.sup..sym. is 1 equivalent of a metallic cation selected from the group consisting of Li.sup..sym., Na.sup..sym., K.sup..sym., Mg.sup.2.sym., Ca.sup.2.sym., Ba.sup.2.sym., Zn.sup.2.sym., Mn.sup.2.sym., Ni.sup.2.sym., Fe.sup.3.sym., Fe.sup.2.sym., Co.sup.2.sym., Cu.sup.2.sym., Al.sup.3.sym., Cr.sup.3.sym., VO.sup. 3.sym., ZrO.sup.2.sym., MoO.sub.2.sup.2.sym. and TiO.sup.2.sym., are suitable as additives for lubricants and hydraulic oils and bring about an improvement in the extreme-pressure properties and in the anti-wear properties.
WHERE R1 AND R2 ARE BYDROGEN OR METHYL; R3 AND R4 ARE EACH AN INDEPENDENTLY SELECTED ALKYL GROUP HAVEING FROM 1 TO 20 CARBON ATOMS; R5 IS THE ORGANIC RESIDUE EXCLUSIVE OF REACTIVE HYDROXYL GOUPS OF A POLYOL, P IS AN INTEGER OF FROM 2 TO 6 INCLUSIVE AND N AND M ARE POSITIVE INTEGERS INDEPENDENTLY SELECTED IN EACH CHAIN AND WHOSE SUM IN EACH CHAIN IS FROM 2 TO 20, ARE PREPARED BY SUCCESSIVELY REACTING BORIC ACID WITH A GLYCOL MONOETHER AND A POLYOL. THESE ESTERS ARE USEFUL AS STABILIZERS AND CORROSION INHIBITORS FOR LUBRICANTS AND NON-AQUEOUS HYDRAULIC FLUIDS.