Rolling bearing, pivot assembly bearing, and disk drive apparatus
US-2024417645-A1 · Dec 19, 2024 · US
Lubricant compositions
US9951290B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9951290-B2 |
| Application number | US-201615086892-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 31, 2016 |
| Priority date | Mar 31, 2016 |
| Publication date | Apr 24, 2018 |
| Grant date | Apr 24, 2018 |
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Abstract
Official abstract text for this publication.
A method for improving corrosion protection and friction coefficient in an engine or other mechanical component lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition comprising a lubricating oil base stock as a major component, and a mixture of (i) at least one organic molybdenum compound, and (ii) at least one borated ester, as a minor component. Corrosion protection and friction coefficient are improved as compared to corrosion protection and friction coefficient achieved using a lubricating oil containing a minor component other than the mixture of (i) at least one organic molybdenum compound, and (ii) at least one borated ester.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for improving corrosion protection and friction coefficient in an engine or other mechanical component lubricated with a lubricating oil by using as the lubricating oil a formulated oil, said formulated oil having a composition comprising a lubricating oil base stock comprising a monoester and other synthetic base oil; a viscosity modifier; and a mixture of (i) at least one molybdenum dithiophosphate having a molybdenum to sulfur ratio of about 0.93, and (ii) at least one borated ester, as a minor component; wherein corrosion protection and friction coefficient are improved as compared to corrosion protection and friction coefficient achieved using a lubricating oil containing a minor component other than the mixture of (i) at least one molybdenum dithiophosphate having a molybdenum to sulfur ratio of about 0.93, and (ii) at least one borated ester, wherein the monoester comprises about 20 wt. % of the formulated oil, the combination of the other synthetic base oil and viscosity modifier comprise from about 66.47 to 69.037 wt. % of the formulated oil, the at least one molybdenum dithiophosphate having a molybdenum to sulfur ratio of about 0.93 comprises from 0.763 to 1.526 wt. % of the formulated oil, and the at least one borated ester represented by the following formula: as well as unreacted glycerol, glycerol mono-, di- and tri-ester, unreacted unreacted boronating agent and unboronated and comprises from about 0.4 to 1.0 wt. % of the formulated oil, and wherein the formulated oil has a friction coefficient of 0.04 or lower at 140° C., as measured by the Mini Traction Machine (MTM) under a contact pressure of 1.0 GHz, and a copper strip rating of 1A or 1B as measured by ASTM D130 at 150° C. 2. A lubricating oil having a composition comprising a lubricating oil base stock comprising a monoester and other synthetic base oil; a viscosity modifier; and a mixture of (i) at least one molybdenum dithiophosphate having a molybdenum to sulfur ratio of about 0.93, and (ii) at least one borated ester, as a minor component; wherein corrosion protection and friction coefficient are improved as compared to corrosion protection and friction coefficient achieved using a lubricating oil containing a minor component other than the mixture of (i) at least one molybdenum dithiophosphate having a molybdenum to sulfur ratio of about 0.93, and (ii) at least one borated ester, wherein the monoester comprises about 20 wt. % of the formulated oil, the combination of the other synthetic base oil and viscosity modifier comprise from about 66.47 to 69.037 wt. % of the formulated oil, the at least one molybdenum dithiophosphate having a molybdenum to sulfur ratio of about 0.93 comprises from 0.763 to 1.526 wt. % of the formulated oil, and the at least one borated ester is represented by the following formula: as well as unreacted glycerol, glycerol mono-, di- and tri-ester, unreacted unreacted boronating agent and unboronated and comprises from about 0.4 to 1.0 wt. % of the formulated oil, and wherein the formulated oil has a friction coefficient of 0.04 or lower at 140° C., as measured by the Mini Traction Machine (MTM) under a contact pressure of 1.0 GHz, and a copper strip rating of 1A or 1B as measured by ASTM D130 at 150° C.
Assignees
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Classifications
by boron or a compound containing boron · CPC title
Low content or no content compositions · CPC title
Groups 6 or 16 · CPC title
Internal-combustion engines · CPC title
Fuel economy · CPC title
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Frequently asked questions
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- What does patent US9951290B2 cover?
- A method for improving corrosion protection and friction coefficient in an engine or other mechanical component lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition comprising a lubricating oil base stock as a major component, and a mixture of (i) at least one organic molybdenum compound, and (ii) at least one borated ester, as…
- Who is the assignee on this patent?
- Exxonmobil Res & Eng Co
- What technology area does this patent fall under?
- Primary CPC classification C10M141/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 24 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).