MICROENCAPSULATION OF LUBRICANT ADDITIVES
First Claim
1. A lubricating oil comprising a nonpolar lubricating oil base stock as a major component and microcapsules as a minor component;
- wherein said microcapsules are dispersed in said nonpolar lubricating oil base stock; and
wherein said microcapsules comprise (i) a core containing a polar solvent and one or more polar lubricating oil additives having solubility in said polar solvent, and (ii) optionally a shell or membrane enclosing said core;
wherein the solubility of the polar lubricating oil additives in the nonpolar lubricating oil base stock is improved as compared to solubility achieved using a lubricating oil containing polar lubricating oil additives in a nonpolar lubricating oil base stock and not containing said microcapsules.
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Abstract
Provided is a lubricating oil including a nonpolar lubricating oil base stock as a major component and microcapsules as a minor component. The microcapsules includes (i) a core containing a polar solvent and one or more polar lubricating oil additives having solubility in the polar solvent, and (ii) optionally a shell or membrane enclosing the core. The solubility of the polar lubricating oil additives in the nonpolar lubricating oil base stock is improved as compared to solubility achieved using a lubricating oil containing polar lubricating oil additives in a nonpolar lubricating oil base stock and not containing the microcapsules. A method of improving solubility of polar lubricating oil additives in a nonpolar lubricating oil base stock is also provided. The lubricating engine oils of this disclosure can be useful in automotive, marine, aviation, and industrial engine and machine components.
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Citations
20 Claims
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1. A lubricating oil comprising a nonpolar lubricating oil base stock as a major component and microcapsules as a minor component;
- wherein said microcapsules are dispersed in said nonpolar lubricating oil base stock; and
wherein said microcapsules comprise (i) a core containing a polar solvent and one or more polar lubricating oil additives having solubility in said polar solvent, and (ii) optionally a shell or membrane enclosing said core;
wherein the solubility of the polar lubricating oil additives in the nonpolar lubricating oil base stock is improved as compared to solubility achieved using a lubricating oil containing polar lubricating oil additives in a nonpolar lubricating oil base stock and not containing said microcapsules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- wherein said microcapsules are dispersed in said nonpolar lubricating oil base stock; and
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9. A lubricating oil comprising a nonpolar lubricating oil base stock as a major component and microcapsules as a minor component;
- wherein said microcapsules are dispersed in said nonpolar lubricating oil base stock; and
wherein said microcapsules comprise (i) a core containing a polar solvent and one or more polar lubricating oil additives having solubility in said polar solvent, and (ii) optionally a shell or membrane enclosing said core;
wherein surface performance in an engine is improved as compared to surface performance in an engine using a lubricating oil containing polar lubricating oil additives in a nonpolar lubricating oil base stock and not containing said microcapsules. - View Dependent Claims (10)
- wherein said microcapsules are dispersed in said nonpolar lubricating oil base stock; and
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11. A method of improving solubility of polar lubricating oil additives in a nonpolar lubricating oil base stock, said method comprising providing a lubricating oil comprising a nonpolar lubricating oil base stock as a major component and microcapsules as a minor component;
- wherein said microcapsules are dispersed in said lubricating oil base stock;
wherein said microcapsules comprise (i) a core containing a polar solvent and one or more polar lubricating oil additives having solubility in said polar solvent, and (ii) optionally a shell or membrane enclosing said core;
wherein the solubility of the polar lubricating oil additives in the nonpolar lubricating oil base stock is improved as compared to solubility achieved using a lubricating oil containing polar lubricating oil additives in a nonpolar lubricating oil base stock and not containing said microcapsules. - View Dependent Claims (12, 13, 14, 15, 16, 17)
- wherein said microcapsules are dispersed in said lubricating oil base stock;
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18. A method of improving surface performance of a lubricating oil in an engine lubricated with the lubricating oil, said method comprising using as the lubricating oil a formulated oil comprising a nonpolar lubricating oil base stock as a major component and microcapsules as a minor component;
- wherein said microcapsules are dispersed in said lubricating oil base stock;
wherein said microcapsules comprise (i) core containing a polar solvent and one or more polar lubricating oil additives having solubility in said polar solvent, and (ii) optionally a shell or membrane enclosing said core;
wherein surface performance in the engine is improved as compared to surface performance in an engine achieved using a lubricating oil containing polar lubricating oil additives in a nonpolar lubricating oil base stock and not containing said microcapsules. - View Dependent Claims (19, 20)
- wherein said microcapsules are dispersed in said lubricating oil base stock;
Specification