Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Heterocyclic ring compound; a heterocyclic ring is one...
Reexamination Certificate
2000-06-30
2002-07-02
McAvoy, Ellen M. (Department: 1764)
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Heterocyclic ring compound; a heterocyclic ring is one...
C508S372000, C508S373000, C508S374000
Reexamination Certificate
active
06413916
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to the field of lubricating compositions for penetrating closely fitting frictional parts with the intent of improving lubrication between the parts and forming a protective non-migrating lubricating film for improving lubrication between the moving parts. In addition to reducing friction between moving surfaces, it also provides good penetration between the close fitting surfaces and remains on the lubricated surfaces without migrating or decomposing. The lubricant composition deposits a corrosion protective coating on the surface which prevents corrosion and reduces wear. The lubricant composition can be delivered to the surface in a number of ways such as being combined with solvents and propellants to making a sprayable lubricant composition.
BACKGROUND OF THE INVENTION
Over the years, several oil additives and synthetic lubricants have been developed in order to improve the performance or replace petroleum distillates as lubricants that reduce friction and wear between machinery parts. Lubrication involves the process of friction and wear reduction, accomplished by maintaining a film of a lubricant between surfaces which are moving with respect to each other. The lubricant prevents contact of the moving surfaces, thus greatly lowering the coefficient of friction and reducing wear. In addition to this function, the lubricant also can be called upon to perform heat removal, containment of contaminants, and other important functions. Additives have been developed to establish or enhance various properties of lubricants. Various additives which are used include viscosity improver, detergents, dispersant, extreme pressure additives, corrosion inhibitors, oxidation inhibitors, rust inhibitors, antiwear agents, and detergents have been used to improve the performance and extend the range of uses for petroleum based lubricants.
Synthetic lubricants have been developed for applications wherein petroleum based lubricants are not effective or inexpensively lubricated with conventional lubricants. Silicone oils, have been found especially useful at high temperatures where many petroleum based lubricants would burn off or decompose. However, synthetics such as silicone oil often show poor lubricity in steel-to-steel frictional applications.
Anti-wear agents, many of which function by a process of interactions with the surfaces, provide a chemical film which prevents metal-to-metal contact under high load conditions. Wear inhibitors which are useful under extremely high load conditions are frequently called “extreme pressure agents”. Certain of these materials, however, must be used judiciously in certain applications due to their property of accelerating corrosion of metal parts, such as bearings. The instant invention utilizes the synergy between several chemical constituents to provide a penetrating lubricant composition incorporating particular constituents to inhibit the undesirable side effects which may be attributable to use of one of more of the chemical constituents which have valuable lubricating properties when used at particular concentrations and combinations.
The present invention provides a multi-purpose lubricant having high penetration and high lubricity while offering low migration and resistance to corrosion.
SUMMARY OF THE INVENTION
The penetrating lubricant composition of the present invention utilizes a combination of ingredients, comprising a light mineral oil of high purity, a molybdenum based lubricant, a metal sulfonate such as calcium sulfonate, a long chain fatty acids, ZDP, a zinc dithiophosphate derivative and more particularly a zinc alkyldithiophosphate, or other diazole such as a thiadiazole derivative. The synergy exhibited between some of the individual components provide superior lubricating capabilities. A masking agent such as vanilla may be added to the composition to provide a pleasant odor. Mineral spirits may be blended with the mineral oil or final composition in an effective amount to add penetrability and control viscosity.
The penetrating lubricant composition of the present invention is prepared by heating an effective amount of a metal sulfonate selected from the group including calcium, barium, and magnesium sulfonate together with long chain fatty acids. The resulting blend is added to a light mineral oil at about 160° F. and mixed together. An effective amount of an organo molybdenum compound, a ZDP, and a corrosion inhibitor such as a alkylthiadiazole are added in order and blended together. The resulting composition contains from about 70 to 90 percent by weight of the light mineral oil, from about 1 to 5 percent by weight of the organo molybdenum compound, from about 10 to about 20 percent by weight of the metal sulfonate, from about 1 to about 5 percent of the long chain fatty acids, from about 0.1 to 3 percent by weight of a ZDP compound and more particularly a zinc alkyldithiophospate compound, and from about 0.01 to 1.0 percent by weight of a diazole corrosion inhibitor. Form 0.001 to about 1.0 percent by weight of a masking agent such as vanilla or a terpene such as limonene may be added to the composition to yield a pleasant odor.
It is an object of the present invention to provide a lubricant composition that provides corrosion resistance.
It is an object of the present invention to provide a penetrating lubricant composition providing a surface film having good friction and wear reduction capabilities when applied to metal surfaces.
It is an object of the present invention to provide a lubricant composition to provide a multi-purpose lubricant which has good penetrating capabilities.
It is an object of the present invention to provide a lubricant composition that forms a protective film.
It is an object of the present invention to provide a lubricant composition applied to metal surfaces by spraying.
It is an object of the present invention to provide a lubricant composition applied by propellant spray, pump spray, aerosol, brushing, or submersion bath.
It is an object of the present invention to provide a lubricant composition utilized in greases, sucker-rod lubricants, cutting fluids, and spray-tube lubricants.
These and other objects of the present invention will be more fully understood from the following description of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The present invention relates to novel penetrating lubricant compositions and methods of applying such compositions to the metal and other surfaces require protection from corrosion and wear.
The individual components can be separately blended into the base fluid or can be blended therein in various subcombinations. Moreover, the components can be blended in the form of separate solutions in a diluent. It is preferable, however, to blend the selected components used in the penetrating lubricant composition in the form of a concentrate as this simplifies the blending operations, reduces the likelihood of blending errors, and takes advantage of the compatibility and solubility characteristics on the individual constituents.
The penetrating lubricant composition of the present invention is prepared by heating an effective amount of a metal sulfonate selected from the group including calcium, barium, and magnesium sulfonate together with long chain fatty acids at about 140° F. producing a mixture having a paste like consistency. The resulting blend is added to a light mineral oil at about 160° F. and mixed together. Heat is applied to effect homogeneity, until a fluid lubricant products is obtained. An effective amount of an organo molybdenum compound, a ZDP or zinc alkyldithiophosphate, and a corrosion inhibitor such as a diazole are added in order and blended together. The resulting composition contains from about 70 to 90 percent by weight of the light mineral oil, from about 0.1 to 5 percent by weight of the organo molybdenum compound, from about 1.0 to about 20 percent by weight of the metal sulfonate, from about 0.1 to about 5 percent of the long chain fatty acids, from about 0.1 to 3 percent by weight
Baumgart Richard J.
Dituro Michael A.
Nonevski Christopher J.
Saini Mandeep S.
Ashland Inc.
Carrithers David W.
Carrithers Law Office
McAvoy Ellen M.
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