Lubricating composition and method for preparing same
OwnerSal A Randisi, Sr.inventor
Life of this patent
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Abstract
A composition made by admixing a major amount of base oils of lubricating viscosity and minor amounts of additives. The additives can include a viscosity modifier, a dispersant, a friction modifier, an anti-oxidant, a suppressant, a tackifier, and thickeners. The dispersant can be a dissolved powered styrene-ethylene/propylene-block copolymer and the thickeners can be fumed silicia. The dispersants and the thickeners are pulverized and dissolved in the composition to provide for inhibition of oil separation during storage.
Claims23
A composition comprising, or made by admixing:
- a major amount of:
- base oils of lubricating viscosity;
- and minor amounts of a viscosity modifier, a dispersant, a friction modifier, an anti-oxidant, a suppressant, a tackifier, and thickeners, the dispersant is a powered styrene-ethylene/propylene-block copolymer and the thickeners are (a) a hydrophobic fumed silica and (b) a hydrophilic fumed silica, the dispersants and the thickeners are pulverized and dissolved in the composition to provide for inhibition of oil separation during storage.
A process for making a composition comprising the steps of:
- adding a viscosity modifier to a kettle;
- adding a first base oil to the kettle;
- mixing the composition with an anchor blade and a disperser blade;
- adding a second base oil;
- increasing a speed of the disperser blade;
- adding an antioxidant and a friction modifier;
- creating a vacuum within the kettle through the use of a rotor/stator assembly;
- adding a dispersant through a vacuum wand, the vacuum rand allows the dispersant to be introduced directly into the rotor/stator assembly so that the dispersant is pulverized, discharged and dissolved under the surface of the oil;
- reducing a speed of the rotor/stator assembly;
- adding thickeners through the vacuum wand, the thickeners are (a) a hydrophobic fumed silica and (b) a hydrophilic fumed silica, the vacuum wand allows the thickeners to be introduced directly into the rotor/stator assembly so that the thickeners are pulverized, discharged and dissolved under the surface of the oil;
- shutting down the rotor/stator;
- adding a tackifier and a suppressant through a cover port;
- and creating a vacuum with the rotor/stator assembly to eliminate air from the composition.
A lubricating formulation prepared from a blend of components comprised of:
- 35-55% mineral oil;
- 30-50% PAO oil;
- 0.5-5% powered styrene-ethylene/propylene-block copolymer;
- 0.5-5% of a fumed silica aftertreated with Dimethyldichlorosilane;
- and 1-10% of a hydrophilic fumed silica with a specific surface area of 200 m2/g, wherein the powered styrene-ethylene/propylene-block copolymer, fumed silica aftertreated with Dimethyldichlorosilane and the hydrophilic fumed silica with a specific surface area of 200 m2/g are introduced directly into a rotor/stator so that the powered styrene-ethylene/propylene-block copolymer, fumed silica aftertreated with Dimethyldichlorosilane and the hydrophilic fumed silica with a specific surface area of 200 m2/g are pulverized, discharged and dissolved under a surface the blend during formulation.
Dependencies are inferred from the claim text.