Lubricating composition
US-2017009180-A1 · Jan 12, 2017 · US
Lubricant composition
US11021673B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11021673-B2 |
| Application number | US-201716461024-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 16, 2017 |
| Priority date | Nov 17, 2016 |
| Publication date | Jun 1, 2021 |
| Grant date | Jun 1, 2021 |
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Abstract
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The invention provides a lubricating oil composition being a lubricating oil composition containing a base oil composition which includes a lubricant base oil belonging to Group 3 of the base oil categories specified by the American Petroleum Institute (API) and a comb-like polymethacrylate-based viscosity index improver wherein the weight-halving temperature is not less than 310° C., and the sulphur content in the aforementioned lubricating oil composition is not more than 0.3 weight % in terms of the total weight of the aforementioned lubricating oil composition, and the aforementioned lubricating oil composition has an SAE viscosity grade of 0W-20, 5W-20 or 5W-30, a viscosity index of not less than 185 and a high-temperature high-shear viscosity at 100° C. of not more than 7.5 mPa·s.
First claim
Opening claim text (preview).
The invention claimed is: 1. A lubricating oil composition comprising: (a) a base oil composition comprising a lubricant base oil belonging to Group 3 of the base oil categories specified by the American Petroleum Institute (API); and (b) a comb-like polymethacrylate-based viscosity index improver having a weight-halving temperature of at least 310° C., and wherein the lubricating oil composition has a sulphur content of at most 0.3 weight % in terms of the total weight of the lubricating oil composition, an SAE viscosity grade of 0W-20, 5W-20 or 5W-30, a viscosity index of at least 185, and a high-temperature high-shear viscosity at 100° C. of at most 7.5 mPa·s. 2. The lubricating oil composition in accordance with claim 1 wherein the viscosity index of the base oil composition is at least 120. 3. The lubricating oil composition in accordance with claim 1 wherein a % Cp of the base oil composition on the basis of ASTM D3238 is at least 90%. 4. The lubricating oil composition in accordance with claim 1 wherein the weight-halving temperature of the comb-like polymethacrylate based viscosity index improver is at least 320° C. 5. The lubricating oil composition in accordance with claim 1 wherein the sulphur content of the lubricating oil composition is at most 0.25 weight % in terms of the total weight of the lubricating oil composition. 6. The lubricating oil composition in accordance with claim 1 wherein a sulphated ash content of the lubricating oil composition is at most 0.6 weight % in terms of the total weight of the lubricating oil composition. 7. The lubricating oil composition in accordance with claim 1 wherein the comb-like polymethacrylate-based viscosity index improver comprises at least 70% methacrylate. 8. The lubricating oil composition in accordance with claim 7 wherein the viscosity index of the base oil composition is greater than 120. 9. The lubricating oil composition in accordance with claim 7 wherein a % Cp of the base oil composition on the basis of ASTM D3238 is at least 90%. 10. The lubricating oil composition in accordance with claim 7 wherein the weight-halving temperature of the comb-like polymethacrylate based viscosity index improver is at least 320° C. 11. The lubricating oil composition in accordance with claim 7 wherein the sulphur content of the lubricating oil composition is at most 0.25 weight % in terms of the total weight of the lubricating oil composition. 12. The lubricating oil composition in accordance with claim 7 wherein a sulphated ash content of the lubricating oil composition is at most 0.6 weight % in terms of the total weight of the lubricating oil composition.
Assignees
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Classifications
containing aliphatic substituents · CPC title
Sulfur free or low sulfur content compositions · CPC title
Fuel economy · CPC title
Pour-point; Viscosity index · CPC title
Ash-less or low ash content · CPC title
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- What does patent US11021673B2 cover?
- The invention provides a lubricating oil composition being a lubricating oil composition containing a base oil composition which includes a lubricant base oil belonging to Group 3 of the base oil categories specified by the American Petroleum Institute (API) and a comb-like polymethacrylate-based viscosity index improver wherein the weight-halving temperature is not less than 310° C., and the s…
- Who is the assignee on this patent?
- Shell Oil Co
- What technology area does this patent fall under?
- Primary CPC classification C10M169/048. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 01 2021 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).