Abstract:
Electroviscous fluids are disclosed which are composed of aluminum silicates particles in an electrically non-conductive liquid and a suitable dispersing agent. The atomic ratio of Al/Si on the surface of the aluminum silicate lies within the range of 0.15 to 0.80.
Abstract:
A friction reducing additive for addition to the lubricating oil crankcase of an internal combustion engine, such as in an automobile, is provided. The additive comprises (a) a hydrocarbon oil of lubricating viscosity; (b) an extreme pressure antiwear agent comprising: (i) an oil dispersion of solid inorganic film-forming potassium borate, (ii) antimony diaklylphosphorodithioate, and (iii) a liquid chlorinated paraffin; (c) an alkaline material; and (d) a viscosity index improver. The preferred additive composition of the present invention also contains an antioxidant and an antifoaming agent.
Abstract:
A lubricant composition for thread or bearing surface operated at high temperature and stress load conditions, a thixotropic mixture including a Jojoba base vehicle, metallic and non-metallic particulates, a metallic component for wetting the stressed thread or bearing surfaces, together with non-metallic particulates that coat the stressed surfaces and other metallic particulate solids also wet by the metallic component. The lubricating vehicle retains the composition in place under extremely high temperatures without gassing off so that the particulate elements function properly to permit relative sliding motion of the stressed surfaces.
Abstract:
High-temperature lubricant compositions which have good extreme pressure and antiwear properties include complex metal chalcogenides having the formula:M.sub.p (M'O.sub.x A.sub.4-x).sub.m.nH.sub.2 Owhere M is a metal selected from the group consisting of: Na, K, Cs, Mg, V, Mn, Fe, Co, Al, Cu, Ga, In, Bi, As, Ni, Zn, Cd, Sb, Sn and Ce;where M' is a metal selected from the group consisting of Mo and W;where A is S or Se;where x ranges from 1 to 3;where p is 1 or 2 depending on the oxidation state of M;where m is ranges from 1 to 5 depending on the oxidation state of M;and n ranges from 0 to 6.
Abstract:
Disclosed is a lubricating composition comprising an oil of lubricating viscosity having dispersed therein a minor amount of an additive composition comprising a mixture of: (a) a hydrated alkali metal borate; (b) an oil-soluble sulfur-containing compound; and (c) a zirconium salt.
Abstract:
A thread sealing and lubricating composition which can be employed at elevated temperatures without carburization of stainless steel fittings is disclosed. The composition contains 8-25% finely divided copper flakes, 5-20% finely divided aluminum particles, and 4-15% non-metallic, non-carbon powder suspended in a petroleum vehicle. The preferred composition contains 10% copper flakes, 5% aluminum powder, 5% non-metallic powder and 80% viscous petroleum vehicle.
Abstract:
Self-lubricating bearings, such as journal-type bearings are obtained by molding under pressure at elevated temperatures a substantially homogeneous blend of from about 70 to 95% of an ultra high molecular weight ethylene polymer and from about 5 to 30% of a normally solid lubricant which can be a wax, fat or mixtures thereof, or a mixture of either or both of these lubricants with a grease. The bearings exhibit excellent dimensional stability, good wear resistance, and a surface which is not oily to the touch. The bearings are self-lubricating, slowly releasing lubricant at temperatures developed in ordinary use.
Abstract:
This invention relates to organosiloxanes which have SiC-bonded ester groups and contain at least one unit of the general formula: ##EQU1## in which R represents the same or different monovalent hydrocarbon radicals having from 1 to 12 carbon atoms, which are free of aliphatic unsaturation and which may contain one ether oxygen atom; R' represents hydrogen or a methyl group (CH.sub.3) and a is 0, 1 or 2. These organosiloxanes can be prepared by hydrolyzing or co-hydrolyzing silanes of the general formula:ROOCCH.sub.2 CH(COOR)CH.sub.2 CHR'CH.sub.2 Si(CH.sub.3).sub.a X.sub.3-a,where R, R' and a are the same as above and X represents the same or different hydrolyzable atoms or groups. Also, they may be prepared by the addition of a diester of allyl succinic acid and/or methallyl succinic acid to an organosiloxane containing Si-bonded hydrogen. These new organosiloxanes may be used as lubricants for inorganic and organic fibers, metal surfaces and as hydraulic fluids.
Abstract:
A composition in the form of a solution or dispersion which includes a perfluoroalkyl group-containing phosphoric acid ester of the formula(R.sub.f XO).sub.n PO(OH).sub.3-n(wherein R.sub.f represents a perfluoroalkyl group containing from 4 to 20 carbons, X represents a divalent organic residue and n is an integer from 1 to 3) and an additive which is a surface active agent, a silicone oil, a highly fluorinated organic compound, a wax or a mixture thereof, the composition being useful for imparting mold releasing properties to a mold.
Abstract:
There is provided an improved process for isothermal shaping of a titanium-containing workpiece in a hot die. A precoat lubricant composition including a glassy component and a solid lubricant such as graphite dispersed in an organic medium is applied to the workpiece, and the workpiece heated to a temperature sufficient to remove the organic medium to leave a residue of glassy material and graphite on the workpiece. The workpiece is then inserted in a heated split die, and the die loaded to alter the shape of the workpiece. The ratio of the solid lubricant to the glassy component is at least one to one. The particle size of the glassy component is important to the surface character of the finally shaped workpiece.