摘要:
Lubricating compositions containing a major amount of a base oil and an effective amount of an additive component having at least one compound of formula (I): where R is one of the following radicals, methyl, ethyl, n-propyl, I-propyl or a combination thereof, and n=0-8. In a preferred embodiment, R is a methyl radical and n=2-3. T he lubricating compositions provide improved lubricating performance, particularly by inhibiting oxidation and improving thermal stability.
摘要:
A lubricant composition for use in a sliding-vane rotary vane compressor has a polyalkyleneglycol base oil component and includes antiwear additives, antioxidants and metal passivators and, optionally, anticorrosion agents and vapour phase anticorrosion agents. The polyalkyleneglycol base oil component is a random copolymer of ethylene oxide (EO) and propylene oxide (PO) having an EO:PO ratio between 3:1 and 1:3, preferably between 1.5:1 and 1:1.5, and having been initiated with a compound having five carbon atoms or less.
摘要:
A lubricant containing (a) a synthetic base oil composition having an overall kinematic viscosity of at least about 4.8x10-6m2/s (4.8 cSt) at 100oC 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.
摘要:
The invention relates to a water-based biodegradable functional liquid for mechanical drives, preferably for use in steam engines. The aim of the invention is to create functional liquids for use in mechanical drives, particularly for hydrodynamically lubricating plain bearings, preferably for crankshafts of superheated steam engines having customary non-overly precise bearing play. The inventive liquids should be able to be used in closed power pack systems also in the existence of sump temperatures exceeding 120 °C, e.g. in the lubricant pan located under a crank drive and be water-based or able to be diluted with water. According to the invention, this is achieved by a percentually low addition of polyaspartic acid to water or to water-glycol mixtures, whereby polyaspartic acid having a molar mass ranging from 1,000 to 10,000 g/mol is preferably used.
摘要:
A lubricant coating disposed between a substrate and a counter surface comprises a reaction layer immediately adjacent the substrate. A bonding layer is immediately adjacent the reaction layer, with the bonding layer comprising a first composition. A low friction, lubricious layer is immediately adjacent the bonding layer, with the lubricious layer comprising a second composition that is different from the first composition.
摘要:
A composition of matter is disclosed wherein the composition comprises an N-aromatic substituted acid amide compound selected from the group consisting of compounds of formula (I) wherein A and B are independently selected alkylene groups; R 1 is selected from the group consisting of hydrogen, alkyl, alkylether, or ester; R 2 is hydrogen if R 1 is hydrogen; R 2 is an alkyl primary amine if R 1 is alkyl, alkylether, or ester; R 3 and R 4 are independently selected from the group consisting of hydrogen and alkyl; R 5 is a sterically hindered phenolic group of formula (II) or formula (III) wherein X is CH 2 , S, NH, or O; and m, n, and p are independently selected integers equal to 0 or 1. These compositions may be used as such or they may be bound to a polymer backbone via a linking moiety. In either case, they are useful as antioxidants, particularly in lubricating oil compositions
摘要:
The present invention relates to a viscosity index improver to be added to lubricating oils and the like. This viscosity index improver contains a graft copolymer having a structural unit formed by an oil-soluble polymer (a) containing an olefin polymer and a structural unit formed by a copolymer (b) of a peroxy bond-containing polymer with a (meth)acrylate and the like or a copolymer (c) of a peroxy bond-containing monomer with 2-hydroxyethyl (meth)acrylate and the like. The viscosity index improver has excellent viscosity index improving property, excellent thickening effect, excellent low-temperature fluidity and excellent shear stability and is also free from the fear of separation in lubricating oils.
摘要:
An industrial lubricant composition is described that comprises (A) at least one vegetable or synthetic triglyceride oil of the formula wherein R , R and R are aliphatic hydrocarbyl groups having at least 60 percent monounsaturated character and containing from about 6 to about 24 carbon atoms and (B) at least one pour point depressant. Optionally, the composition may also contain (C) a performance additive and (D) an oil. na
摘要:
A lubricant composition is disclosed which comprises, a triglyceride oil lubricant and an oil soluble copper compound antioxidant. The oil soluble copper compounds are particularly effective antioxidants for triglycerides. The lubricant composition can include soluble zinc compounds which reduce wear and/or soluble antimony compounds which reduce wear and can function as adjuvant antioxidants reducing the amount of oil soluble copper required. Preferred zinc and antimony compounds are zinc dithiophosphate antiwear/antioxidant, and antimony dialkyldithiocarbamate antioxidant adjuvant.
摘要:
A highly branched polymer in the form of a comb, star, nanogel and structural combinations thereof in which a plurality of polyolefin arms formed of polymers of 1-alkenes are attached to a backbone having repeating units containing aliphatic groups, aromatic groups, heteroatom-containing groups and combinations thereof.